CN101767867B - Activated sludge and processing method of alkaline sewage and high ammonia-nitrogen wastewater using the activated sludge - Google Patents
Activated sludge and processing method of alkaline sewage and high ammonia-nitrogen wastewater using the activated sludge Download PDFInfo
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Abstract
The invention discloses activated sludge for processing alkaline sewage and high ammonia-nitrogen wastewater and a processing method of alkaline sewage and high ammonia-nitrogen wastewater. The processing method of the alkaline sewage and the high ammonia-nitrogen wastewater of the invention can effectively process the alkaline sewage and the high ammonia-nitrogen wastewater at the same time, and has low cost, simple craft, short procedure and low raw material consumption.
Description
Technical field
The present invention is specifically related to the treatment process of a kind of active sludge and a kind of alkaline sewage and high ammonia-nitrogen wastewater.
Background technology
In petroleum refining process, diesel oil and gasoline generally all will remove wherein acidic substance through alkali cleaning.Alkali wash is exactly to utilize 5%～20% NaOH solution to mix with gasoline or diesel oil, and the acidic substance in gasoline or the diesel oil are dissolved in the NaOH solution, and is settlement separate then, with NaOH solution discharger.These solution after the NaOH alkali cleaning are commonly called as alkaline sewage or waste lye.This water water quality complexity, the Pollutant levels height, the amount of sewage is few, and its common ground is to contain pollutents such as phenols, sulfide, is one of long-standing problem of Petrochemical Enterprises environment protection.
The alkaline sewage that refinery produces mainly contains diesel alkaline residue waste water and gasoline alkaline residue waste water two classes.Diesel alkaline residue waste water generally can be used to produce naphthenic acid, and its principle is separated wherein naphthenic acid (or phenol) and oil for acid waste lye being neutralized from alkaline sewage.Gasoline alkaline residue also can be produced petroleum phenol with the neutral method, producing process and diesel alkaline residue, to produce naphthenic acid similar, but because the content of gasoline alkaline residue PetroChina Company Limited. phenol seldom, and basicity height, so must add a large amount of acid neutralizations, so just strengthened cost, so producer is reluctant processing vapor oil alkaline residue mostly, but as sewage discharge.
According to the treatment principle of solid waste " minimizing, resource utilization and innoxious ", the reply alkaline residue carries out resource utilization and harmless treatment.Alkaline residue processing method generally is divided into direct facture and method of chemical treatment at present, and directly facture has methods such as sale, dilution, deep-well injection and burning disposal, wherein based on burning method; Method of chemical treatment is divided into oxidation style, neutralisation, gas formulation etc., but common oxidation style processing efficiency is not high; Wet air oxidation is higher because of its running cost, operation is difficult to steadily etc. is difficult to generally apply; Burning method, neutralisation, gas formulation etc. can generate SO again
2, SO
3, H
2S and cause secondary pollution.
In recent years, some company and enterprise attempts adopting the high-performance bio technology to handle alkaline sewage, as directly adding special efficacy degraded microorganism or metabolism matrix class material altogether, immobilization biological intensifying technology and biological reinforced preparation, and invented novel reactor such as QBR (Quick Bioreactor) etc.Though these methods can effectively be removed the organic composition in the alkaline residue, and the basicity in the alkaline sewage is not had removal effect.
The bio-denitrifying sewage technology is an important research direction in the current water pollution control field.Nearly decades, particularly about nearly ten years,, caused serious " eutrophication " phenomenon, as " red tide ", " wawter bloom " etc. because height is nitrogenous, a large amount of dischargings of phosphorus-containing wastewater.So researching and developing biological denitrification process and device efficient, less energy-consumption has become current field of water treatment important research project.
The sewage denitrification method that generally adopts is traditional biological denitride technology (formula 1-1) at present, and this technology mainly comprises two processes of nitrification and denitrification.Nitrifying process carries out in two steps, and at first ammonia oxidation bacteria (AOB) is converted into nitrite with ammonia nitrogen, then by nitrous acid oxidation bacterium (NOB) nitrite is converted into nitrate, and this two step all will consume a large amount of basicity.Denitrification process is in anoxic and exists under the condition of organic carbon source, is nitrogen by denitrifying bacteria with nitrite and nitrate reduction.The traditional biological decarburization technique is widely used in the denitrogenation processing of ammonia nitrogen waste water, but when handling low C/N ratio wastewater (as some waste water that discharges based on the municipal effluent or the fertilizer plant of resident living sewage), owing to reasons such as carbon source deficiency or fluctuating temperatures, nitric efficiency is lower.
Short range biological denitrification technology (formula 1-2) is compared with the traditional biological denitride technology, be that biological nitrification process is controlled at the ammonia oxidation stage, then directly carry out denitrification, not only saved the required energy of the further aeration oxidation of nitrite, and saved the required carbon source of denitrification nitrate.Therefore, realize that short-cut nitrification and denitrification has great importance for improving nitric efficiency, the saving energy and carbon source.
SBR (Sequencing Batch Reactor) technology is the abbreviation of intermittent activated sludge process sewage treatment process, and its treatment unit has only a sbr reactor pond, is a kind of sewage disposal process by activated sludge process of routine.In operational process, the variation of mixeding liquid volume and running status etc. can require according to character, effluent quality, effluent characteristics and the operation function of concrete sewage to change flexibly in its working time, the reactor.Concerning the sbr reactor device, just sequential control, no spatial control obstacle so can control flexibly, therefore is the optimised process of research Microbial denitrogenation decarburization mechanism and stability thereof.
Summary of the invention
Technical problem to be solved by this invention has provided the diverse method of treatment process of a kind of and existing waster water of alkaline residul from oil refinery and high ammonia-nitrogen wastewater, and a kind of active sludge that is used to handle alkaline sewage and high ammonia-nitrogen wastewater is provided.The treatment process of alkaline sewage of the present invention and high ammonia-nitrogen wastewater can extremely effectively be handled alkaline sewage and high ammonia-nitrogen wastewater simultaneously, and cost is lower, and technology is simple, and flow process is short, and raw material consumption is few.
The inventor finds, utilize basicity in the alkaline sewage as the required basicity of nitrated denitrogenation, utilize in the alkaline sewage other organic pollutants as the required carbon source of denitrification, and adopt intermittent activated sludge process to handle alkaline sewage and high ammonia-nitrogen wastewater, can bring into play synergy, extremely effectively handle alkaline sewage and high ammonia-nitrogen wastewater simultaneously, and technology be simple, flow process is short, and raw material consumption is few.
The general alkaline sewage water quality of table 1
Because in the ammonia nitrogen degradation process, the nitrated stage need consume a large amount of basicity, and denitrification process need add organic carbon source, can see by table 1, and alkaline sewage basicity, volatile phenol content, sulphur content, COD content are all very high.Based on this, the contriver finds through lot of experiments: alkaline sewage is applied in the ammonia nitrogen degradation process, can significantly reduces the dosage of carbon source and basicity, reduce working cost, reach the purpose of " utilization of waste material ", " treatment of wastes with processes of wastes against one another ".Simultaneously, if ammonia nitrogen degradation is controlled at the short-cut nitrification and denitrification stage, compare with traditional technology, can save 25% oxygen at nitrifying process, 40% add organic carbon source and can increase substantially the speed of reaction can be saved at denitrification process, working cost and facility investment can be further reduced.
Therefore, the present invention relates to a kind of active sludge that is used to handle alkaline sewage and high ammonia-nitrogen wastewater, wherein, the flora of the 50%-80% quantity in the microflora belongs to nitrococcus; In the nitrococcus, the quantity of the Nitrosomonas europaea in the nitrous acid monospore Pseudomonas (Nitrosomonas) (Nitrosomonas europaea) accounts for 30%-50%, the bacterial classification quantity of nitrous acid spirillum (Nitrosospira) accounts for 5-25%, and the bacterial classification quantity of nitrous acid Coccus (Nitrosococcus) accounts for 4%-20%;
Denitrifying bacterium probably accounts for the 20%-50% of whole microflora quantity, is excellent with 30%-48%; Described denitrifying bacterium is mainly: account for the bacillus (Bacillus) of denitrifying bacteria quantity 20-30% and account for Rhodopseudomonas (Pseudomonas) of the 20-30% of denitrifying bacteria quantity etc.Also found to account for the floating mould door (Planctomycetes) of denitrifying bacteria quantity 10-20%, as anaerobic ammonia oxidizing bacterias such as Candidatus Brocadia, Candidatus Kuenenia and Candidatus Scalindua genus;
The quantitative proportion of nitrococcus and denitrifying bacteria was excellent with 5: 3～7: 3.
Therefore the present invention relates to the treatment process of a kind of alkaline sewage and high ammonia-nitrogen wastewater, it adopts alternately aerobic-anoxic process that above-mentioned waste water is handled in the sbr reactor device, it comprises the following step: water inlet is a nitrogenous source with the high-concentration ammonia nitrogenous wastewater, with the alkaline sewage is organic carbon source and basicity source, with above-mentioned active sludge high-concentration ammonia nitrogenous wastewater and alkaline sewage are handled, and the conventional SBR operation phase according to different is controlled the ratio of water inlet; Wherein, sludge concentration MLSS is 3～8g/L, and in each cycle, concentration is the disposable reactor that enters of high ammonia nitrogen water inlet of 200～300mg/L; Alkaline sewage divides and adds for 4～8 times, is spaced apart 18～32 hours at every turn, and the COD of always intaking is 800～2000mg/L;
Wherein, high ammonia-nitrogen wastewater is disposable water inlet, and alkaline sewage be repeatedly disperse the water inlet and the domestication stage the SBR method incomplete same.
Wherein, required organic carbon source and the basicity of denitrogenation is provided by alkaline sewage fully.In order to reduce the impact of alkaline sewage to mud, simultaneously cause the too high at short notice phenomenon of pH in the reactor for fear of once adding the alkaline sewage excessive concentration, the mode that the present invention's selection adds alkaline sewage in batches, advance for the first time alkaline residue and ammonia nitrogen composite waste, its flooding quantity accounts for about the 80-90% of Total Water, add alkaline sewage (accounting for about Total Water 10-20%) the follow-up branch again for 4～8 times, is spaced apart 18～32 hours at every turn.It is constant that the influent ammonium concentration in this stage keeps, and is good with 200～300mg/L.Water inlet C/N is than keeping constant, and preferable is 3.5～4.
Wherein, in the short-cut nitrification and denitrification process, what the time of aeration unit was preferable is 4～12 hours, preferred 8 hours; What the time scale of nitrated operation of aeration and anoxic denitrification operation was preferable is 1: 1～4: 1, preferred 1: 1.
Wherein, that described active sludge content MLSS is preferable is 4.5～8.5g/L, and what gas-water ratio was preferable is 80～200.In this step, what load that can stabilizing treatment waste water was preferable is: water inlet COD volumetric loading is 0.8～2kgCOD/m
3.d, the influent ammonia nitrogen volumetric loading is 0.2～0.5kg/m
3.d, water inlet volatile phenol volumetric loading is 0.4～1.2kg/m
3.d, water inlet sulphur content load is 0.15～0.6kg/m
3.d.
Among the present invention, described active sludge can make by the sludge acclimatization method of this area routine, and is preferable, and it can be made by following method:
Adopt alternately aerobic-anoxic process that mud is tamed in the sbr reactor device, it comprises the following step:
(I) short-cut nitrification and denitrification sludge acclimatization: with high ammonia-nitrogen wastewater as nitrogenous source, municipal wastewater or artificial distribution are organic carbon source, with the water inlet of the composite waste of this nitrogenous source and organic carbon source as ammonia nitrogen short-cut nitrification and denitrification sludge acclimatization process, mud is tamed, the domestication time is 8～12 days, (the Mixed Liquor Suspended Solids of sludge concentration MLSS in the domestication process, be mixed liquor suspended solid, MLSS concentration, be used for characterizing sludge concentration in the mixed solution, be 3～8g/L down together), influent ammonium concentration is 50～300mg/L, and water inlet COD is 120～750mg/L; Wherein, the allotment of described composite waste is to mix for the demand of carbon source and basicity according to biology, according to the ammonia nitrogen concentration of water inlet, guarantees to have enough organic carbons and basicity.
(II) alkaline sewage sludge acclimatization: as nitrogenous source, municipal wastewater and alkaline sewage are organic carbon source with high ammonia-nitrogen wastewater, with the composite waste after nitrogenous source and the organic carbon source blending as water inlet.The active sludge that step (I) obtains is further tamed, alkaline sewage to organic carbon source (in COD, contribution down together) progressively is increased to more than 80% by 10%, the domestication time is 14～21 days, the MLSS of mud is 3～8g/L in the domestication process, influent ammonium concentration remains on 200～300mg/L, and water inlet COD is 800～2000mg/L; Wherein, the allotment of described composite waste is to mix for the demand of carbon source and basicity according to biology, according to the ammonia nitrogen concentration of water inlet, guarantees to have enough organic carbons and basicity.
Among the present invention, step (I) and (II) all carry out according to intermittent activated sludge (SBR, SequencingBatch Reactor) method.
In the step (I), described mud, promptly seed sludge is preferable be MLVSS/MLSS between 0.4～0.8, the returned sluge of preferred 0.6～0.7 municipal wastewater treatment plant; Ammonia nitrogen and organic carbon source that the described domestication stage is required can also be provided by the artificial distribution, and perhaps being mixed according to a certain percentage by municipal wastewater interpolation high ammonia-nitrogen wastewater provides; Wherein, the artificial distribution can prepare with glucose blending bicarbonate of ammonia.Preferable, also can suitably add the required micro-salt of microorganism in the mixed water inlet, as nutritive substance phosphorus, water inlet COD: N: what the P ratio was preferable by weight is: 100: 25～40: 1～2; What wherein, described nutritive substance phosphorus was preferable is microcosmic salt (as potassium primary phosphate and/or Sodium phosphate dibasic etc.).The control influent ammonium concentration goes forward one by one stage by stage from low to high and tames, and the ammonia nitrogen concentration of water inlet goes forward one by one and is preferably 50mg/L → 80mg/L → 120mg/L → 250mg/L.The C/N ratio of water inlet should remain on certain limit, and preferable is 2.5～3.In this step, preferable, divide and improve influent ammonia nitrogen and COD load for 4～8 times gradually.
In the step (I), in the short-cut nitrification and denitrification process, what the time of aeration unit was preferable is 1～12 hour, preferred 1 hour; What the time scale of nitrated operation of aeration and anoxic denitrification operation was preferable is 1～4, preferred 3: 1.
Through the sludge acclimatization of step (I), MLSS is 3～8g/L, and water outlet ammonia nitrogen and TN concentration can reach sewage drainage standard, and the nitrosification rate reaches more than 80%, shows short-cut nitrification and denitrification sludge acclimatization success.
In the step (II), the C/N of water inlet is than keeping constant, and preferable is 3.5～4.What the part by weight of alkaline sewage in organic carbon source was preferable is 8.3% → 25% → 50% → 83.3% gradually from low to high.The preferable municipal wastewater by easy biochemistry of remaining organic carbon source provides.In the short-cut nitrification and denitrification process, what the time of aeration unit was preferable is 2～12 hours, preferred 6 hours; What nitrated operation of aeration and anoxic denitrification activity time ratio were preferable is 1～4, preferred 2.In this step, preferable, divide and improve water inlet alkaline sewage load for 4～8 times.
Through the sludge acclimatization of step (II), MLSS is 3～8g/L.Through discovering to this step, alkaline sewage can be used as the organic carbon source of ammonia nitrogen degradation and the main provider of basicity, and wherein poisonous component is to the not influence of biochemical treatment effect, water outlet ammonia nitrogen and TN concentration can reach sewage ammonia nitrogen and total nitrogen emission standard, and the nitrosification rate remains on more than 70% always, and water outlet COD is below 200mg/L.
Among the present invention, the reactor that described treatment process adopts is an intermittent type sbr reactor device, and volume is looked concrete treatment capacity and determined size (general reactor volume is about 1.2～1.8 times of water volume into), and its shape can be rectangle, cylindrical etc.
Among the present invention, the mode of described aeration can adopt blast aeration, pressurized air aeration etc., preferred blast aeration.Suggestion bottom aeration is with under meter control aeration rate.Reactor reply temperature is controlled (heating installation is adopted in suggestion, with temperature in thermocouple and the digital display adjusting apparatus controlling reactor).Mechanical stirring is adopted in the alr mode suggestion.By adopting timer or other control devices (as automatization control) that reaction is moved in the mode at anoxic/aerobic interval.
In the treatment process of the present invention, when the utilization active sludge is handled alkaline sewage and high ammonia-nitrogen wastewater, and in the preferred domestication stage to active sludge, be in the step (I)～(II), all, reach national sewage ammonia nitrogen and total nitrogen emission standard (NH with water outlet with the beginning of water inlet as one-period
3-N＜5mg/L, TN＜15mg/L) as the sign of one-period end, each cycle all comprises into water, reaction, sedimentation, drainage procedure.Preferable, master operation and condition that each cycle comprises are as follows:
(1) water inlet operation: step (I) and what (II) adopt all is once to intake, the inlet valve of connection water inlet pipe to be opened, waste water directly enters the sbr reactor device under action of gravity, close inlet valve after reaching predetermined amount.When alkaline sewage and high ammonia-nitrogen wastewater being handled with active sludge, be divided into 4～8 water inlets within the one-period, water inlet for the first time is made up of high ammonia-nitrogen wastewater and alkaline sewage, water intake mode is with domestication stage (accounting for the 80-95% of total water inlet volume), divide subsequently and add alkaline sewage (account for the 5-20% of Total Water, Jin Shui main purpose is to replenish basicity) for 3 to 7 times respectively herein.
(2) reaction process: this operation mainly is made up of a plurality of aeration units, and each aeration unit comprises nitrated operation of aeration and anoxic denitrification operation.The time span of aeration unit time and each operation is controlled by TW-A06 type timer.Preferable, this operation also has the alkaline residue water inlet.
In this operation, the present invention controls the domestication that reaction conditions is beneficial to nitrococcus.In the scope of 25 ℃ to 35 ℃ of temperature, the activity of nitrococcus is higher than nitrifier, thus control reaction temperature at 25～35 ℃, in order to cut down the consumption of energy, preferred temperature is 25～28 ℃.Because the low dissolved axygen state helps the growth of nitrococcus, so the control aeration rate makes the interior dissolved oxygen of reactor in lower level, preferred DO 0.2～0.5mg/L.It is 8～9 o'clock that the maximum nitrosification speed of nitrococcus occurs in pH, and it is 7.0～8.5 o'clock that the maximum rate of nitrification of Nitromonas occurs in pH, so preferred reaction pH is 7.5～8.3.
What the nitrated operation of aeration was preferable is: after waste water enters reactor, start devices such as temperature control, stirring, conditioned reaction pH.Open air intake valve simultaneously, regulate aeration rate, make the interior DO of reactor in optimum range.
What the anoxic denitrification operation was preferable is: stop aeration, create anaerobic environment, operating parameters such as controlled temperature, stirring velocity are identical with the nitrated operation of aeration.
(3) precipitation operation: close inlet valve, air intake valve, water discharging valve and spoil disposal valve, treat the mud natural subsidence.
(4) drainage procedure: to 1/2～1/3 o'clock of reaction soln volume, open water discharging valve at sludge settling, with processed waste water outside rising pipe is discharged to reactor.
Handle waster water of alkaline residul from oil refinery with method of the present invention, COD can be dropped to below the 200mg/L from 800～2000mg/L, the water inlet volumetric loading is at 0.8～2kgCOD/m
3.d the time, the COD clearance is 80%～90%; Water inlet volatile phenol volumetric loading is 0.4～1.2kg/m
3.d the time, water outlet volatile phenol concentration is lower than 35mg/L, and degradation efficiency is more than 90%; Water inlet sulphur content volumetric loading is 0.15～0.6kg/m
3.d the time, water outlet volatile phenol concentration is lower than 15mg/L, and degradation efficiency greatly reduces the foul smell in the water outlet more than 90%; The influent ammonia nitrogen volumetric loading is 0.2～0.5kg/m
3.d the time, water outlet NH
3-N＜15mg/L, TN＜15mg/L reaches national sewage ammonia nitrogen and total nitrogen emission standard.
In the treatment process of the present invention, above-mentioned each optimum condition is arbitrary combination without prejudice to the field on the basis of common sense, promptly gets each preferred embodiment.
The alkaline sewage that the present invention relates to derives from the alkaline sewage that produces in the refinery petrol and diesel oil treating process, and other raw materials and reagent are all commercially available to be got.
Positive progressive effect of the present invention is:
(1) in the treatment process of the present invention, used reactor and reaction process have less investment, energy consumption is low, processing costs is cheap, be convenient to characteristics such as operational administrative.
(2) treatment process of the present invention has been utilized and has been difficult to the very high alkaline sewage of individual curing or individual curing expense as carbon source and the alkali source of handling ammonia nitrogen waste water, and significantly reduced of the impact of alkaline residue treating processes to the sewage-farm operation, reduce contingent great number and entrusted processing costs.Efficiently handled alkaline sewage on the one hand, avoided pollution, protected environment environment; Can also fully discover and use the potential value that exists in the alkaline residue on the other hand, realize the purpose of " treatment of wastes with processes of wastes against one another ", meet the requirement of enterprise's cleaning development, conservation of nature environment, realization saving type, Sustainable development.
Embodiment
Further specify the present invention with embodiment below, but the present invention is not limited.
The 1 short-cut nitrification and denitrification sludge acclimatization stage 1 of embodiment
Seed sludge is a Shanghai Coke Plant aerobic aeration pond mud, adopts the artificial distribution as water inlet, and organic carbon source wherein and nitrogenous source are from glucose and bicarbonate of ammonia, and influent ammonium concentration is 100mg/L, and COD is 300mg/L.At pH 7.7～8.3,25 ± 1 ℃ of temperature, dissolved oxygen is less than 0.5mg/L, aeration unit 1h, aeration part 45min wherein, anoxic part 15min.Under this reaction conditions, mud is tamed.After 5 days domestication, sludge concentration MLSS is 4.5g/L, and the water outlet ammonia nitrogen concentration is 85.2mg/L, and COD is 50mg/L.
The 2 short-cut nitrification and denitrification sludge acclimatization stages 2 of embodiment
Seed sludge is mayor's bridge sewage purification plant, Shanghai second pond returned sluge, adopts Shanghai Chang Qiao purification water factory's water inlet and Yanzhou Coal Mining Lunan Chemical Fertilizer Plant water outlet to carry out blending and does into water, and its main nitrogen containing component is urea, bicarbonate of ammonia etc.At pH 7.7～8.3,25 ± 1 ℃ of temperature, dissolved oxygen is less than 0.5mg/L, aeration unit 2h, wherein aeration part 90min tames mud under the reaction conditions of anoxic part 30min.This stage has been carried out 4 cycles, about 12 days sludge acclimatization altogether.Each cycle influent ammonium concentration is respectively 50mg/L, 80mg/L, 120mg/L and 250mg/L, and COD concentration is 120mg/L, 200mg/L, 300mg/L and 625mg/L.After treatment, ammonia nitrogen concentration is respectively 3.2mg/L, 2.5mg/L, 3.3mg/L and 3.7mg/L in each cycle water outlet, all be lower than 5mg/L, TN＜15mg/L, national sewage ammonia nitrogen and total nitrogen emission standard have been reached, and the nitrosification rate reaches more than 80%, and sludge concentration MLSS is 5～7g/L, so can be considered short-cut nitrification and denitrification sludge acclimatization success.
The embodiment 3 alkaline sewage degradation bacteria domestication stage 1
This stage is that (mud of embodiment 2) carries out on the basis of short-cut nitrification and denitrification sludge acclimatization success, seed sludge is from short-cut nitrification and denitrification sludge acclimatization stages 2 mud, nitrogenous source provides by adding bicarbonate of ammonia, and the allotment influent ammonium concentration is 300mg/L.Organic carbon source is made up of alkaline sewage and municipal wastewater two portions.The alkaline sewage that produces in the gasoline refining of alkaline sewage from SINOPEC's Chang Ling refinery wherein; Municipal wastewater purifies the biochemical water inlet of water factory from Shanghai Chang Qiao, and its contribution margin to COD respectively is 500mg/L.At pH 7.7～8.3,25 ± 1 ℃ of temperature, dissolved oxygen is less than 0.5mg/L, aeration unit 1h, aeration part 45min further tames short-cut nitrification and denitrification mud under the condition of anoxic part 15min, and organic carbon source and nitrogenous source are in the disposable adding of initial reaction stage.Find that through domestication in 10 days ammonia nitrogen concentration drops to below the detection line in the water outlet, is lower than the national sewage ammonia nitrogen emission standard of 5mg/L.The nitrosification rate maintains 70～90% always.Water outlet COD is 128mg/L, and degradation efficiency is 89%.Find that by mensuration its clearance is all more than 80% to sulphur content and volatile phenol.
The embodiment 4 alkaline sewage degradation bacteria domestication stage 2
Seed sludge is the mud after the domestication in the short-cut nitrification and denitrification sludge acclimatization stage 2, and the water inlet nitrogenous source is from Yanzhou Coal Mining Lunan Chemical Fertilizer Plant waste water, and ammonia nitrogen concentration is 300mg/L; Organic carbon source is made up of alkaline sewage and municipal wastewater two portions, the alkaline sewage that produces in the gasoline refining of alkaline sewage from SINOPEC's Chang Ling refinery, municipal wastewater purifies water factory's water inlet from Shanghai Chang Qiao, and its contribution margin to COD respectively is 600mg/L.At pH 7.7～8.3,25 ± 1 ℃ of temperature, dissolved oxygen is less than 0.5mg/L, aeration unit 6h, wherein aeration part 4h further tames short-cut nitrification and denitrification mud under the condition of anoxic part 2h.Nitrogenous source is in the disposable adding of initial reaction stage, and organic carbon source divides 6 equivalent to add behind uniform mixing.Through domestication in 7 days, in the water outlet, ammonia nitrogen concentration was lower than detection line, and TN is 7.39mg/L, is lower than the national sewage total nitrogen emission standard of 15mg/L.The nitrosification rate maintains 70～90% always.Water outlet COD is 228mg/L, and degradation efficiency is 81%.Find that by mensuration its clearance is all more than 80% to sulphur content and volatile phenol.
Embodiment 5 stable operation stage 1
Mud is alkaline sewage degradation bacteria domestication stages 2 mud (mud among the embodiment 4 after the domestication), the low carbon source high ammonia-nitrogen wastewater that produces in the Preparation of Catalyst of nitrogenous source from SINOPEC's Chang Ling refinery; The alkaline sewage that produces in the gasoline refining of organic carbon source from SINOPEC's Chang Ling refinery, its contribution margin to COD is 1200mg/L, is 764mg/L to the contribution of basicity, influent ammonium concentration is 300mg/L.At pH 7.7～8.3,25 ± 1 ℃ of temperature, dissolved oxygen is less than 0.5mg/L, aeration unit 6h, aeration part 4h utilizes the short-cut nitrification and denitrification mud that domestication is good among the embodiment 4 to handle under the condition of anoxic part 2h.Nitrogenous source is in the disposable adding of initial reaction stage, and organic carbon source divides 6 addings.Find that through 7 days aeration operation backs ammonia nitrogen concentration drops to below the detection line in the water outlet, is lower than the national sewage ammonia nitrogen emission standard of 5mg/L, the nitrosification rate maintains 70～90% always; TN is 37.39mg/L, is higher than the national sewage total nitrogen emission standard of 15mg/L.After the 7th day aeration unit finishes, stop aeration, and regulate pH about 7, through sedimentation in 1 day and denitrification, the 8th day, TN reduced to 5.6mg/L, satisfied the national sewage total nitrogen emission standard of TN＜15mg/L.Water outlet COD is 160mg/L, and degradation efficiency is 86.7%; Total volatile phenol content of intaking is 315mg/L, and water outlet volatile phenol concentration was 41.5mg/L in the 8th day, and degradation efficiency is 86.8%; The water inlet total sulfur content is 196.5mg/L, and the water outlet sulphur content was 25mg/L in the 8th day, and degradation efficiency is 87.3%.
Embodiment 6 stable operation stage 2
Mud is stable operation stage 1 mud (mud among the embodiment 4 after the domestication), the low carbon source high ammonia-nitrogen wastewater that produces in the Preparation of Catalyst of nitrogenous source from SINOPEC's Chang Ling refinery; Organic carbon source removes diesel alkaline residue waste water behind the naphthenic acid from Zhenghai, Zhejiang petro-chemical corporation; Wherein Jin Shui ammonia nitrogen concentration is 250mg/L, and COD is 2000mg/L, and basicity is 415mg/L.Because this alkaline sewage is low to the contribution of basicity than gasoline alkaline residue waste water, therefore add sodium bicarbonate and replenish part basicity, control pH maintains 7.7～8.3.Temperature is 27 ± 1 ℃ in the controlling reactor, and dissolved oxygen is controlled to be 0.3-0.5mg/L; Aeration unit 8h, wherein aeration part 4h handles waste water under the condition of anoxic part 4h.Nitrogenous source (high ammonia-nitrogen wastewater) is in the disposable adding of initial reaction stage, and organic carbon source (diesel alkaline residue waste water) divides 8 times and adds.Water inlet for the first time is made up of high ammonia-nitrogen wastewater and alkaline sewage, and flooding quantity accounts for 90% of total water inlet volume, divides subsequently and adds alkaline sewage respectively 7 times, accounts for 10% of Total Water.Find after moving 8 days that the water outlet ammonia nitrogen concentration is lower than detection line, TN concentration is 12.3mg/L, can reach national sewage ammonia nitrogen and total nitrogen emission standard; Water outlet COD is 217mg/L.
The microbiological analysis of embodiment 7 short-cut nitrification and denitrification acclimation sludges
After through domestication, the acclimation sludge among the embodiment 2 has been carried out the evaluation of microflora, identify and the 16SrDNA order-checking through Physiology and biochemistry, identify dominant strain.Qualification result shows that in the described active sludge, the flora of 70% in the microflora belongs to nitrococcus; Wherein (be meant in all nitrococcus), Nitrosomonas europaea in the nitrous acid monospore Pseudomonas (Nitrosomonas) (Nitrosomonas europaea) accounts for 45%, the bacterial classification of nitrous acid spirillum (Nitrosospira) accounts for 20%, and the bacterial classification of nitrous acid Coccus (Nitrosococcus) accounts for 12%;
Denitrifying bacterium accounts for 48% of whole microflora; Described denitrifying bacterium is mainly: the Rhodopseudomonas (Pseudomonas) of the bacillus (Bacillus) and 30% (being to account for denitrifying bacteria) of 30% (being to account for denitrifying bacteria) etc.Also found to account for the floating mould door (Planctomycetes) of flora quantity 10% (being to account for denitrifying bacteria), as anaerobic ammonia oxidizing bacterias such as Candidatus Brocadia, CandidatusKuenenia and Candidatus Scalindua genus; The quantitative proportion of nitrococcus and denitrifying bacteria is 7: 3.
The microbiological analysis of embodiment 8 short-cut nitrification and denitrification acclimation sludges
After through domestication, to the sampling carrying out of the mud after the steady running among the embodiment 6 evaluation of microflora, identify and the 16SrDNA order-checking through Physiology and biochemistry, identify dominant strain.Qualification result shows that in the described active sludge, in the described active sludge, the flora of 50% in the microflora belongs to nitrococcus; Wherein (be meant in all nitrococcus), Nitrosomonas europaea in the nitrous acid monospore Pseudomonas (Nitrosomonas) (Nitrosomonas europaea) accounts for 40%, the bacterial classification of nitrous acid spirillum (Nitrosospira) accounts for 15%, and the bacterial classification of nitrous acid Coccus (Nitrosococcus) accounts for 8%;
Denitrifying bacterium accounts for 29% of whole microflora; Described denitrifying bacterium is mainly: the Rhodopseudomonas (Pseudomonas) of the bacillus (Bacillus) and 24% (being to account for denitrifying bacteria) of 30% (accounting for the ratio of denitrifying bacteria) etc.Also found to account for the floating mould door (Planctomycetes) of flora quantity 20% (being to account for denitrifying bacteria), as anaerobic ammonia oxidizing bacterias such as Candidatus Brocadia, CandidatusKuenenia and Candidatus Scalindua genus;
The quantitative proportion of nitrococcus and denitrifying bacteria is 5: 3.
The 9 short-cut nitrification and denitrification sludge acclimatization stages 3 of embodiment
Seed sludge is mayor's bridge sewage purification plant, Shanghai second pond returned sluge, adopts Shanghai Chang Qiao purification water factory's water inlet and Yanzhou Coal Mining Lunan Chemical Fertilizer Plant water outlet to carry out blending and does into water, and its main nitrogen containing component is urea, bicarbonate of ammonia etc.At pH 7.7～8.3,25 ± 1 ℃ of temperature, dissolved oxygen is less than 0.5mg/L, aeration unit 2h, wherein aeration part 90min tames mud under the reaction conditions of anoxic part 30min.This stage has been carried out 4 cycles, about 10 days sludge acclimatization altogether.Each cycle influent ammonium concentration is respectively 50mg/L, 80mg/L, 120mg/L and 250mg/L, and COD concentration is 120mg/L, 200mg/L, 300mg/L and 625mg/L.After treatment, ammonia nitrogen concentration is respectively 3.2mg/L, 2.5mg/L, 3.3mg/L and 3.7mg/L in each cycle water outlet, all be lower than 5mg/L, TN＜15mg/L, national sewage ammonia nitrogen and total nitrogen emission standard have been reached, and the nitrosification rate reaches more than 80%, and sludge concentration MLSS is 8g/L, so can be considered short-cut nitrification and denitrification sludge acclimatization success.
The embodiment 10 alkaline sewage degradation bacteria domestication stage 3
This stage is to carry out on the basis of short-cut nitrification and denitrification sludge acclimatization success, seed sludge is from short-cut nitrification and denitrification sludge acclimatization stages 2 mud (mud after embodiment 9 domestications), nitrogenous source provides by adding bicarbonate of ammonia, and the allotment influent ammonium concentration is 200mg/L.Organic carbon source is made up of alkaline sewage and municipal wastewater two portions.The alkaline sewage that produces in the gasoline refining of alkaline sewage from SINOPEC's Chang Ling refinery wherein; Municipal wastewater purifies the biochemical water inlet of water factory from Shanghai Chang Qiao, and its contribution margin to COD respectively is 500mg/L.At pH 7.7～8.3,25 ± 1 ℃ of temperature, dissolved oxygen is less than 0.5mg/L, aeration unit 1h, aeration part 45min further tames short-cut nitrification and denitrification mud under the condition of anoxic part 15min, and organic carbon source and nitrogenous source are in the disposable adding of initial reaction stage.Find that through domestication in 10 days ammonia nitrogen concentration drops to below the detection line in the water outlet, is lower than the national sewage ammonia nitrogen emission standard of 5mg/L.The nitrosification rate maintains 70～90% always.Water outlet COD is 128mg/L, and degradation efficiency is 89%.Find that by mensuration its clearance is all more than 80% to sulphur content and volatile phenol.
Embodiment 11 stable operation stage 3
Mud is alkaline sewage degradation bacteria domestication stages 3 mud (mud among the embodiment 10 after the domestication), the low carbon source high ammonia-nitrogen wastewater that produces in the Preparation of Catalyst of nitrogenous source from SINOPEC's Chang Ling refinery; The alkaline sewage that produces in the gasoline refining of organic carbon source from SINOPEC's Chang Ling refinery, its contribution margin to COD is 2000mg/L, is 764mg/L to the contribution of basicity, influent ammonium concentration is 300mg/L.At pH 7.7～8.3,25 ± 1 ℃ of temperature, dissolved oxygen is less than 0.5mg/L, aeration unit 6h, aeration part 4h utilizes the short-cut nitrification and denitrification mud that domestication is good among the embodiment 4 to handle under the condition of anoxic part 2h.Nitrogenous source is in the disposable adding of initial reaction stage, and organic carbon source divides 6 addings.Find that through 7 days aeration operation backs ammonia nitrogen concentration drops to below the detection line in the water outlet, is lower than the national sewage ammonia nitrogen emission standard of 5mg/L, the nitrosification rate maintains 70～90% always; TN is 37.39mg/L, is higher than the national sewage total nitrogen emission standard of 15mg/L.After the 7th day aeration unit finishes, stop aeration, and regulate pH about 7, through sedimentation in 1 day and denitrification, the 8th day, TN reduced to 5.6mg/L, satisfied the national sewage total nitrogen emission standard of TN＜15mg/L.Water outlet COD is 160mg/L, and degradation efficiency is 86.7%; Total volatile phenol content of intaking is 315mg/L, and water outlet volatile phenol concentration was 41.5mg/L in the 8th day, and degradation efficiency is 86.8%; The water inlet total sulfur content is 196.5mg/L, and the water outlet sulphur content was 25mg/L in the 8th day, and degradation efficiency is 87.3%.
The microbiological analysis of embodiment 12 active sludge of the present invention
After through domestication, the mud after the domestication among the embodiment 10 has been carried out the evaluation of microflora, identify and the 16SrDNA order-checking through Physiology and biochemistry, identify dominant strain.Qualification result shows that in the described active sludge, the flora of 80% in the microflora belongs to nitrococcus; Wherein (be meant in all nitrococcus), Nitrosomonas europaea in the nitrous acid monospore Pseudomonas (Nitrosomonas) (Nitrosomonas europaea) accounts for 30%, the bacterial classification of nitrous acid spirillum (Nitrosospira) accounts for 25%, and the bacterial classification of nitrous acid Coccus (Nitrosococcus) accounts for 20%;
Denitrifying bacterium accounts for 20% of whole microflora; Described denitrifying bacterium is mainly: the Rhodopseudomonas (Pseudomonas) of the bacillus (Bacillus) and 20% (being to account for denitrifying bacteria) of 20% (being to account for denitrifying bacteria) etc.Also found to account for the floating mould door (Planctomycetes) of flora quantity 10% (being to account for denitrifying bacteria), as anaerobic ammonia oxidizing bacterias such as Candidatus Brocadia, CandidatusKuenenia and Candidatus Scalindua genus; The quantitative proportion of nitrococcus and denitrifying bacteria is 5: 5.
The 13 short-cut nitrification and denitrification sludge acclimatization stages 4 of embodiment
Seed sludge is mayor's bridge sewage purification plant, Shanghai second pond returned sluge, adopts Shanghai Chang Qiao purification water factory's water inlet and Yanzhou Coal Mining Lunan Chemical Fertilizer Plant water outlet to carry out blending and does into water, and its main nitrogen containing component is urea, bicarbonate of ammonia etc.At pH 7.7～8.3,25 ± 1 ℃ of temperature, dissolved oxygen is less than 0.5mg/L, aeration unit 2h, wherein aeration part 90min tames mud under the reaction conditions of anoxic part 30min.This stage has been carried out 4 cycles, about 10 days sludge acclimatization altogether.Each cycle influent ammonium concentration is respectively 50mg/L, 80mg/L, 120mg/L and 250mg/L, and COD concentration is 120mg/L, 200mg/L, 300mg/L and 625mg/L.After treatment, ammonia nitrogen concentration is respectively 3.2mg/L, 2.5mg/L, 3.3mg/L and 3.7mg/L in each cycle water outlet, all be lower than 5mg/L, TN＜15mg/L, national sewage ammonia nitrogen and total nitrogen emission standard have been reached, and the nitrosification rate reaches more than 80%, and sludge concentration MLSS is 8g/L, so can be considered short-cut nitrification and denitrification sludge acclimatization success.
The embodiment 14 alkaline sewage degradation bacteria domestication stage 4
This stage is to carry out at (mud after embodiment 13 domestications) on the basis of short-cut nitrification and denitrification sludge acclimatization success, seed sludge is from short-cut nitrification and denitrification sludge acclimatization stages 2 mud, nitrogenous source provides by adding bicarbonate of ammonia, and the allotment influent ammonium concentration is 200mg/L.Organic carbon source is made up of alkaline sewage and municipal wastewater two portions.The alkaline sewage that produces in the gasoline refining of alkaline sewage from SINOPEC's Chang Ling refinery wherein; Municipal wastewater purifies the biochemical water inlet of water factory from Shanghai Chang Qiao, and its contribution margin to COD respectively is 500mg/L.At pH 7.7～8.3,25 ± 1 ℃ of temperature, dissolved oxygen is less than 0.5mg/L, aeration unit 1h, aeration part 45min further tames short-cut nitrification and denitrification mud under the condition of anoxic part 15min, and organic carbon source and nitrogenous source are in the disposable adding of initial reaction stage.Find that through domestication in 10 days ammonia nitrogen concentration drops to below the detection line in the water outlet, is lower than the national sewage ammonia nitrogen emission standard of 5mg/L.The nitrosification rate maintains 70～90% always.Water outlet COD is 128mg/L, and degradation efficiency is 89%.Find that by mensuration its clearance is all more than 80% to sulphur content and volatile phenol.
Embodiment 15 stable operation stage 4
Mud is alkaline sewage degradation bacteria domestication stages 4 mud (mud among the embodiment 14 after the domestication), the low carbon source high ammonia-nitrogen wastewater that produces in the Preparation of Catalyst of nitrogenous source from SINOPEC's Chang Ling refinery; The alkaline sewage that produces in the gasoline refining of organic carbon source from SINOPEC's Chang Ling refinery, its contribution margin to COD is 2000mg/L, is 764mg/L to the contribution of basicity, influent ammonium concentration is 300mg/L.At pH 7.7～8.3,25 ± 1 ℃ of temperature, dissolved oxygen is less than 0.5mg/L, aeration unit 6h, aeration part 4h utilizes the short-cut nitrification and denitrification mud that domestication is good among the embodiment 4 to handle under the condition of anoxic part 2h.Nitrogenous source is in the disposable adding of initial reaction stage, and organic carbon source divides 6 addings.Find that through 7 days aeration operation backs ammonia nitrogen concentration drops to below the detection line in the water outlet, is lower than the national sewage ammonia nitrogen emission standard of 5mg/L, the nitrosification rate maintains 70～90% always; TN is 37.39mg/L, is higher than the national sewage total nitrogen emission standard of 15mg/L.After the 7th day aeration unit finishes, stop aeration, and regulate pH about 7, through sedimentation in 1 day and denitrification, the 8th day, TN reduced to 5.6mg/L, satisfied the national sewage total nitrogen emission standard of TN＜15mg/L.Water outlet COD is 160mg/L, and degradation efficiency is 86.7%; Total volatile phenol content of intaking is 315mg/L, and water outlet volatile phenol concentration was 41.5mg/L in the 8th day, and degradation efficiency is 86.8%; The water inlet total sulfur content is 196.5mg/L, and the water outlet sulphur content was 25mg/L in the 8th day, and degradation efficiency is 87.3%.
The microbiological analysis of embodiment 16 active sludge of the present invention
After through domestication, the mud after the domestication among the embodiment 14 has been carried out the evaluation of microflora, identify and the 16SrDNA order-checking through Physiology and biochemistry, identify dominant strain.Qualification result shows that in the described active sludge, the flora of 80% in the microflora belongs to nitrococcus; Wherein (be meant in all nitrococcus), Nitrosomonas europaea in the nitrous acid monospore Pseudomonas (Nitrosomonas) (Nitrosomonas europaea) accounts for 50%, the bacterial classification of nitrous acid spirillum (Nitrosospira) accounts for 5%, and the bacterial classification of nitrous acid Coccus (Nitrosococcus) accounts for 4%;
Denitrifying bacterium accounts for 30% of whole microflora; Described denitrifying bacterium is mainly: the Rhodopseudomonas (Pseudomonas) of the bacillus (Bacillus) and 20% (being to account for denitrifying bacteria) of 20% (being to account for denitrifying bacteria) etc.Also found to account for the floating mould door (Planctomycetes) of flora quantity 10% (being to account for denitrifying bacteria), as anaerobic ammonia oxidizing bacterias such as Candidatus Brocadia, CandidatusKuenenia and Candidatus Scalindua genus; The quantitative proportion of nitrococcus and denitrifying bacteria is 10: 3.
Claims (14)
1. active sludge that is used to handle alkaline sewage and high ammonia-nitrogen wastewater, it is characterized in that: in the described active sludge, the flora of the 50%-80% quantity in the microflora belongs to nitrococcus; In the nitrococcus, Nitrosomonas europaea in the nitrous acid monospore Pseudomonas (Nitrosomonas) (Nitrosomonas europaea) quantity accounts for 30%-50%, the bacterial classification quantity of nitrous acid spirillum (Nitrosospira) accounts for 5-25%, and the bacterial classification quantity of nitrous acid Coccus (Nitrosococcus) accounts for 4%-20%;
Denitrifying bacterium accounts for the 20%-50% of whole microflora quantity; Described denitrifying bacterium is mainly: account for the bacillus (Bacillus) of the 20%-30% of denitrifying bacteria quantity and account for the Rhodopseudomonas (Pseudomonas) of the 20%-30% of denitrifying bacteria quantity; And floating mould door (Planctomycetes) anaerobic ammonia oxidizing bacteria that accounts for denitrifying bacteria quantity 10%-20%.
2. active sludge as claimed in claim 1 is characterized in that: described denitrifying bacterium accounts for the 30%-48% of whole microflora.
3. the treatment process of alkaline sewage and high ammonia-nitrogen wastewater, it is characterized in that: it adopts alternately aerobic-anoxic process that above-mentioned waste water is handled in the sbr reactor device, it comprises the following step: water inlet is a nitrogenous source with the high-concentration ammonia nitrogenous wastewater, with the alkaline sewage is organic carbon source and basicity source, with claim 1 or 2 described active sludge high-concentration ammonia nitrogenous wastewater and alkaline sewage are handled, and the conventional SBR operation phase according to different is controlled the ratio of water inlet; Wherein, sludge concentration MLSS is 3～8g/L, and in each cycle, concentration is the disposable reactor that enters of high ammonia nitrogen water inlet of 200～300mg/L; Alkaline sewage divides and adds for 4～8 times, is spaced apart 18～32 hours at every turn, and the COD of always intaking is 800～2000mg/L.
4. treatment process as claimed in claim 3 is characterized in that: in described treatment process, it is constant that influent ammonium concentration keeps, and is 200～300mg/L; Water inlet C/N is 3.5～4 than keeping constant; In the short-cut nitrification and denitrification process, the time of aeration unit is 4～12 hours; The time scale of nitrated operation of aeration and anoxic denitrification operation is 1: 1～4: 1; Described MLSS is 4.5～6.5g/L, and gas-water ratio is 80～200.
5. treatment process as claimed in claim 4 is characterized in that: in the short-cut nitrification and denitrification process, the time of aeration unit is 8 hours; The time scale of nitrated operation of aeration and anoxic denitrification operation is 1: 1.
6. treatment process as claimed in claim 3 is characterized in that: in described treatment process, the load of stabilizing treatment waste water is: water inlet COD volumetric loading is 0.8～2kgCOD/m
3.d, the influent ammonia nitrogen volumetric loading is 0.2～0.5kg/m
3.d, water inlet volatile phenol volumetric loading is 0.4～1.2kg/m
3.d, water inlet sulphur content load is 0.15～0.6kg/m
3.d.
7. treatment process as claimed in claim 3 is characterized in that: described active sludge is made by following method: adopt alternately aerobic-anoxic process that mud is tamed in the sbr reactor device, it comprises the following step:
(I) short-cut nitrification and denitrification sludge acclimatization: with high ammonia-nitrogen wastewater as nitrogenous source, municipal wastewater or artificial distribution are organic carbon source, with the water inlet of the composite waste of this nitrogenous source and organic carbon source as ammonia nitrogen short-cut nitrification and denitrification sludge acclimatization process, mud is tamed, the domestication time is 8～12 days, sludge concentration MLSS is 3～8g/L in the domestication process, and influent ammonium concentration is 50～300mg/L, and water inlet COD is 120～750mg/L;
(II) alkaline sewage sludge acclimatization: as nitrogenous source, municipal wastewater and alkaline sewage are organic carbon source with high ammonia-nitrogen wastewater, with the composite waste after nitrogenous source and the organic carbon source blending as water inlet; The active sludge that step (I) obtains is further tamed, in COD, alkaline sewage progressively is increased to more than 80% to the contribution of organic carbon source by 10%, the domestication time is 14～21 days, the MLSS of mud is 3～8g/L in the domestication process, influent ammonium concentration remains on 200～300mg/L, and water inlet COD is 800～2000mg/L;
Wherein, step (I) and (II) all carry out according to the intermittent activated sludge method.
8. treatment process as claimed in claim 7 is characterized in that:
In the step (I), described mud is the municipal wastewater treatment plant returned sluge of MLVSS/MLSS between 0.4～0.8; The ammonia nitrogen concentration of water inlet goes forward one by one stage by stage from low to high and tames, and is 50mg/L → 80mg/L → 120mg/L → 250mg/L; The C/N of water inlet is 2.5～3 than keeping constant; Also add nutritive substance phosphorus in the mixed water inlet, water inlet COD: N: the P ratio is by weight: 100: 25～40: 1～2; In the short-cut nitrification and denitrification process, the time of aeration unit is 1～12 hour; The time scale of nitrated operation of aeration and anoxic denitrification operation is 1～4; In this step, divide and improve influent ammonia nitrogen and COD load for 4～8 times gradually;
In the step (II), water inlet C/N is 3.5～4 than keeping constant; The part by weight of alkaline sewage in organic carbon source is 8.3% → 25% → 50% → 83.3% gradually from low to high, and remaining organic carbon source is provided by municipal wastewater; In the short-cut nitrification and denitrification process, the time of aeration unit is 2～12 hours; Nitrated operation of aeration and anoxic denitrification activity time ratio are 1～4; In this step, divide and improve water inlet alkaline sewage load for 4～8 times.
9. treatment process as claimed in claim 8 is characterized in that:
In the step (I), described nutritive substance phosphorus is potassium primary phosphate and/or Sodium phosphate dibasic; In the short-cut nitrification and denitrification process, the time of aeration unit is 1 hour; The time scale of nitrated operation of aeration and anoxic denitrification operation is 3: 1;
In the step (II), in the short-cut nitrification and denitrification process, the time of aeration unit is 6 hours; Nitrated operation of aeration and anoxic denitrification activity time ratio are 2: 1.
10. treatment process as claimed in claim 3 is characterized in that: when with active sludge alkaline sewage and high ammonia-nitrogen wastewater being handled, with the beginning of water inlet as one-period, reach national ammonia nitrogen and total nitrogen standard of drainage, i.e. NH with water outlet
3The sign that-N＜5mg/L, TN＜15mg/L finish as one-period, each cycle all comprises into water, reaction, sedimentation, drainage procedure.
11. treatment process as claimed in claim 7, it is characterized in that: when alkaline sewage and high ammonia-nitrogen wastewater being handled with active sludge, and step (I) and (II) in, all with the beginning of water inlet as one-period, reach national ammonia nitrogen and total nitrogen standard of drainage, i.e. NH with water outlet
3The sign that-N＜5mg/L, TN＜15mg/L finish as one-period, each cycle all comprises into water, reaction, sedimentation, drainage procedure.
12. treatment process as claimed in claim 10 is characterized in that: master operation and condition that each cycle comprises are as follows:
(1) water inlet operation: when alkaline sewage and high ammonia-nitrogen wastewater being handled with active sludge, be divided into 4～8 water inlets within the one-period, water inlet for the first time is made up of high ammonia-nitrogen wastewater and alkaline sewage, water intake mode is with the domestication stage, flooding quantity accounts for the 80-95% of total water inlet volume, divide subsequently and add alkaline sewage respectively 3 to 7 times, account for the 5-20% of Total Water;
(2) reaction process: this operation mainly is made up of a plurality of aeration units, and each aeration unit comprises nitrated operation of aeration and anoxic denitrification operation; The time span of aeration unit time and each operation is controlled by TW-A06 type timer; And this operation also has the alkaline residue water inlet;
(3) precipitation operation: close inlet valve, air intake valve, water discharging valve and spoil disposal valve, treat the mud natural subsidence;
(4) drainage procedure: to 1/2～1/3 o'clock of reaction soln volume, open water discharging valve at sludge settling, with processed waste water outside rising pipe is discharged to reactor.
13. treatment process as claimed in claim 11 is characterized in that: master operation and condition that each cycle comprises are as follows:
(1) water inlet operation: step (I) and (II) in what adopt all is once to intake, the inlet valve of connection water inlet pipe is opened, waste water directly enters the sbr reactor device under action of gravity, close inlet valve after reaching predetermined amount; When alkaline sewage and high ammonia-nitrogen wastewater being handled with active sludge, be divided into 4～8 water inlets within the one-period, water inlet for the first time is made up of high ammonia-nitrogen wastewater and alkaline sewage, water intake mode is with the domestication stage, flooding quantity accounts for the 80-95% of total water inlet volume, divide subsequently and add alkaline sewage respectively 3 to 7 times, account for the 5-20% of Total Water;
(2) reaction process: this operation mainly is made up of a plurality of aeration units, and each aeration unit comprises nitrated operation of aeration and anoxic denitrification operation; The time span of aeration unit time and each operation is controlled by TW-A06 type timer; And this operation also has the alkaline residue water inlet;
(3) precipitation operation: close inlet valve, air intake valve, water discharging valve and spoil disposal valve, treat the mud natural subsidence;
(4) drainage procedure: to 1/2～1/3 o'clock of reaction soln volume, open water discharging valve at sludge settling, with processed waste water outside rising pipe is discharged to reactor.
14. as claim 12 or 13 described treatment processs, it is characterized in that: the reaction conditions in the reaction process is as follows: temperature is 25 ℃～35 ℃; Dissolved oxygen in the reactor is DO 0.2～0.5mg/L; The pH of reaction is 7.5～8.3.
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| CN105366887B (en) * | 2015-11-25 | 2017-12-05 | 华东理工大学 | Oil refinery waste water comprehensive processing technique |
| CN107739086B (en) * | 2017-03-31 | 2020-04-28 | 青岛锦龙弘业环保有限公司 | Denitrification method of high-salinity wastewater |
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