CN103739178B - Rapid starting method of anaerobic ammonia oxidation reactor for enhancing sludge hydrolysis - Google Patents
Rapid starting method of anaerobic ammonia oxidation reactor for enhancing sludge hydrolysis Download PDFInfo
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Abstract
The invention discloses a rapid starting method of an anaerobic ammonia oxidation reactor for enhancing sludge hydrolysis. The rapid starting method is characterized by comprising the following steps: carrying out high-substrate concentration pre-treatment on inoculated sludge to accelerate heterotrophic bacteria to be dead of hunger and utilizing the inoculated sludge to an inoculating reactor; continually carrying out policies including high substrate concentration, low hydraulic retention time, high liquid surface ascending velocity, pH (Potential of Hydrogen) regulation and control to rapidly eliminate the heterotrophic bacteria and improve the density of the heterotrophic bacteria in the sludge, so as to finally realize the rapid starting of the anaerobic ammonia oxidation reactor. According to the rapid starting method, the quantity of the heterotrophic bacteria in the sludge can be obviously reduced in short time and the density of anaerobic ammonia oxidation bacteria is increased; the rapid starting method can observe an obvious and continuous anaerobic ammonia oxidation phenomenon of the reactor after the reactor is started for 32 days.
Description
Technical field
The present invention relates to wastewater biological denitrificaion technical field, particularly a kind of quick start method of anaerobic ammonia oxidation reactor.
Background technology
The Eleventh Five-Year Plan period, chemical oxygen demand (COD) (chemical oxygen demand, COD) discharge is effectively controlled, and ammonia nitrogen rises to the principal pollutant of surface water, whole nation surface water ammonia nitrogen exceeds standard phenomenon ubiquity, and caused body eutrophication is very serious.Ammonia nitrogen is included in " 12 " contaminant transport model system by China.Water body nitrate pollution controls to have become current great environmental protection subject urgently to be resolved hurrily.
Ammonia oxidation can nitrite be electron acceptor(EA) be the process of nitrogen and a small amount of nitrate by Anammox.The volume usefulness of this technique can up to 77kg/ (m
3d), far away higher than traditional nitration denitrification technique; Without the need to aeration and interpolation organic carbon source, excess sludge production is low, and compared to traditional biological denitrification process, processing cost significantly reduces.Thus, this process quilt thinks the Novel waste denitrogenation of water technology of the characteristic of most Sustainable development so far.
But anaerobic ammonia oxidizing bacteria is autotroph, and cell yield is low, and the doubling time reaches 11d, responsive to envrionment conditions (as organism, temperature etc.), cause the start-up course of reactor very slow.When adopting conventional activated sludge inoculation, often need several months even year, reactor just can manifest obvious Anammox phenomenon, seriously constrains the engineer applied of this technique.
When inoculating conventional activated sludge and starting anaerobic ammonia oxidation reactor, because of wherein containing a large amount of heterotrophic bacteriums, the competition of matrix and living space can be produced anaerobic ammonia oxidizing bacteria, be unfavorable for growth and the propagation of anaerobic ammonia oxidizing bacteria.As heterotroph denitrifying bacteria can preferentially utilize nitrite to carry out denitrification, Anammox is caused to be difficult to obtain matrix nitrite; In addition, the doubling time of heterotrophic bacterium is significantly shorter than anaerobic ammonia oxidizing bacteria, easilier seizes competitive advantage in the finite space, hinders the amplification of anaerobic ammonia oxidizing bacteria, causes anaerobic ammonia oxidation reactor to start slowly.
For the problems referred to above, the present invention proposes the method that reinforcement sludge hydrolysis starts to accelerate anaerobic ammonia oxidation reactor, by carrying out the pre-treatment of Super matrix concentration to seed sludge, higher starting substrate concentration and lower hydraulic detention time are arranged to reactor, and the measures such as pH regulation and control are carried out to reaction solution, make the hungry hydrolysis fast of the heterotrophic bacterium in seed sludge, and washed out rapidly, improve the density of anaerobic ammonia oxidizing bacteria in reactor at short notice, finally realize the quick startup of anaerobic ammonia oxidation reactor.Test proves, adopts the enhanced hydrolysis starting method of this anaerobic ammonia oxidation reactor greatly can shorten the start time of anaerobic ammonia oxidation reactor.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of convenient, fast reinforcement sludge hydrolysis anaerobic ammonia oxidation reactor quick start method.
A kind of anaerobic ammonia oxidation reactor quick start method of reinforcement sludge hydrolysis, first the pre-treatment of Super matrix concentration is carried out to seed sludge, dead with the hunger of accelerating heterotrophic bacterium, be used further to reaction of inoculation device, then the strategies such as Super matrix concentration, low hydraulic detention time, high surperficial upflow velocity and pH regulation and control are taked to reactor, eliminate heterotrophic bacterium fast, improve the density of anaerobic ammonia oxidizing bacteria in mud, finally realize the quick startup of anaerobic ammonia oxidation reactor.
The anaerobic ammonia oxidation reactor quick start method of reinforcement sludge hydrolysis of the present invention, comprises the following steps:
An anaerobic ammonia oxidation reactor quick start method for reinforcement sludge hydrolysis, comprises the following steps:
(1) choose granule sludge, rinse organics removal with phosphoric acid buffer;
(2) add the mixed solution of ammonia and nitrite, keep anoxia condition, leave standstill after mixing, make the heterotrophic bacterium fast hydrolyzing in mud dead, treat that supernatant liquor is smelly, blackening, supernatant liquor is inclined to, mud after leaving standstill with phosphoric acid buffer cleaning again, cleans the organism that sludge hydrolytic discharges;
(3) repetitive operation step (2) at least 1 time;
(4) mud obtained after step (3) process is added anaerobic ammonia oxidation reactor, keep anoxic condition in reactor, by controlling the water inlet ammonia of reactor and the initial concentration of nitrite and hydraulic detention time, make the hydrolysis self-dissolving of heterotrophic bacterium in mud; Control reaction zone fluid surface upflow velocity, so that the organism of the floc sludge formed after sludge hydrolytic and release is washed out reactor rapidly simultaneously;
(5) mode simultaneously added by quantitative flow to be added dilute alkali liquid to reactor bottom stream, and reinforcement sludge is hydrolyzed, and alleviates because being hydrolyzed caused acidification, adds diluted acid, alleviate because of the alkalinization caused by denitrification to reactor middle and upper part stream.
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, the granularity chosen in step (1) is 1 ~ 4mm, and density is not less than 1.05g/mL, and settling velocity is not less than 20m/h.
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, the ammonia density of the mixed solution of the ammonia described in step (2) and nitrite is 100 ~ 150mg/L, and nitrite concentration is 100 ~ 200mg/L, all in nitrogen.
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, step (1) and (2) middle phosphate buffer density are 1mmol/L, pH is 7.
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, in step (4), the control water inlet ammonia of reactor and the initial concentration of nitrite are 150 ~ 200mg/L, all in nitrogen, hydraulic detention time is 4 ~ 8h, and it is 6.3 ~ 12.7cm/h that reaction zone fluid surface upflow velocity controls.
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, described anaerobic ammonia oxidation reactor is upflow anaerobic sludge blanket reactor, the blade diameter length ratio of reaction zone is 1:10 ~ 1:15, mud add-on is 2/3 ~ 4/5 of reaction zone volume, and working temperature is set to 30 ~ 37 DEG C.
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, the sig water in step (5) is the bicarbonate solution of 1.5 ~ 3.0g/L, and flow acceleration is 30 ~ 50mL/ (Ld).
The anaerobic ammonia oxidation reactor quick start method of described reinforcement sludge hydrolysis, the diluted acid in step (5) is hydrochloric acid or the sulphuric acid soln of 2mmol/L ~ 5mmol/L, and flow acceleration is 20 ~ 40mL/ (Ld).
Compared with prior art, the advantage that has of the present invention:
(1) the present invention adopts Super matrix (especially nitrite) concentration to carry out pre-treatment to seed sludge, promotes that the heterotrophic bacterium fast hydrolyzing in mud is dead by the toxic action of high density matrix; Simultaneously by the flushing repeatedly of phosphoric acid buffer, the organism that sludge hydrolytic discharges is cleaned, avoid it to join the Growth and metabolism affecting anaerobic ammonia oxidizing bacteria in reactor.
(2) the present invention is in reactor start-up process, higher water inlet substrate concn and shorter hydraulic detention time are set, make reactor volume traffic overload, the hydrolysis self-dissolving of heterotrophic bacterium in further quickening mud, reach and significantly reduce the quantity of heterotrophic bacterium and the effect of density at short notice, and then increase the density of anaerobic ammonia oxidizing bacteria.
(3) the present invention adopts high fluid surface upflow velocity, rapidly the organism of the floc sludge formed after sludge hydrolytic and release can be washed out reactor rapidly, alleviates its negative impact to Anammox.
(4) the present invention to add dilute alkali liquid at reactor bottom quantitative flow, can be hydrolyzed by reinforcement sludge, and alleviate because being hydrolyzed caused acidification, at middle part, quantitative flow adds diluted acid, can alleviate because of the alkalinization caused by denitrification, the pH value maintaining reaction solution is in the suitableeest scope (7.5 ~ 8.3) of Anammox.
(5) the enhanced hydrolysis starting method of this anaerobic ammonia oxidation reactor of the present invention is adopted greatly can to shorten the start time of anaerobic ammonia oxidation reactor.
Accompanying drawing explanation
Fig. 1 is the technical process of the anaerobic ammonia oxidation reactor quick start method of reinforcement sludge of the present invention hydrolysis, and in Fig. 1, the concentration of ammonia and nitrite is all in nitrogen;
Fig. 2 is the granule sludge picture adopting embodiments of the invention 1 to start front and back; Fig. 2 a is the photo of seed sludge anaerobic grain sludge, and Fig. 2 b is the mud picture that 70d takes out from reactor, and Fig. 2 c is the photo of single anaerobic ammonium oxidation granular sludge;
Fig. 3 adopts in embodiments of the invention 2 from floc sludge picture (the anaerobic ammonia oxidation reactor picture of Fig. 3 a) and after having started (Fig. 3 b) that reactor water outlet is collected.
Embodiment:
Below by way of case study on implementation, the invention will be further described, and unrestricted the present invention.
Embodiment 1
Anaerobic grain sludge 1L is fetched from certain paper mill effluent treatment station IC reactor, recording its particle diameter is 2.5 ± 0.4mm, density is 1.081 ± 0.055g/mL, settling velocity is 36.7 ± 3.8m/h, first phosphoric acid buffer (1mmol/L is adopted, pH is 7) granule sludge fetched is rinsed 3 times, load the container of 2L, adding ammonia density is 120mg/L, nitrite concentration is that 150mg/L(is all in nitrogen) matrix solution, stir 10min, shady place 1d is statically placed in after passing into argon gas 30min, smelly, after blackening, the continuation phosphoric acid buffer after supernatant liquor that inclines rinses 3 times.Granule sludge after cleaning repeats above operation again and completes pre-treatment 2 times.By pretreated sludge seeding to cubic capacity 2.5L, the Anammox UASB reactor of reaction zone volume 1.1L, initially water inlet matrix ammonia and nitrite concentration are set and are 150mg/L, all in nitrogen, initial hydraulic detention time 7.5 ± 0.3h, reaction zone fluid surface upflow velocity is 6.77 ± 0.76cm/h, carry out the startup of anaerobic ammonia oxidation reactor, in operational process, added the potassium bicarbonate solution of 1.5g/L from the slow stream of reactor bottom by peristaltic pump, average flow acceleration controls as 42mL/ (Ld), the 2mmol/L dilute hydrochloric acid solution that slow stream adds in the middle part of reactor, average flow acceleration controls as 35mL/ (Ld), after continuous operation 32d, namely can observe reactor continuous, obvious Anammox phenomenon, 77d runs, the clearance of reactor to ammonia and nitrite reaches 90% and 99% respectively, move to the red anaerobic ammonium oxidation granular sludge that 100d obtains signature.In whole start-up course, reactor water outlet pH value all-the-time stable is in 7.5 ~ 8.2.
Embodiment 2
Get anaerobic grain sludge from certain beer brewery water treatment station, record its median size 1.7mm, mean density is 1.056g/mL, and settling velocity is 26.4m/h, and adding ammonia density is 150mg/L, and nitrite concentration is 170mg/L; In UASB reactor start-up process, initially water inlet matrix ammonia and nitrite concentration are set and are 180mg/L, all in nitrogen, initial hydraulic detention time 5h, reaction zone fluid surface upflow velocity is 10.19cm/h, in operational process, be flow acceleration by peristaltic pump from the potassium bicarbonate solution that the slow stream of reactor bottom adds 2.0g/L be 35mL/ (Ld)), in the middle part of reactor, slow stream adds 3.5mmol/L dilute hydrochloric acid solution (flow acceleration is 26mL/ (Ld)).
All the other conditions are identical with embodiment 1.
6d before reactor start-up process, reactor water outlet ammonia nitrogen concentration (>300mg/L) is significantly higher than influent ammonium concentration, shows that now mud is hydrolyzed rapidly in reactor, discharges inorganic states ammonia nitrogen; 6th ~ 13d, reactor water outlet ammonia nitrogen concentration is reduced to gradually close to 180mg/L, roughly fair with influent ammonium concentration, 14th ~ 37d, the average water outlet ammonia nitrogen concentration of reactor is 171mg/L, present typical active lagging characteristics in Anammox start-up course, to 42d, ammonia nitrogen removal frank reaches 30%, and the anaerobic ammoxidation activity of this post-reactor strengthens gradually, run through 130d, the granule sludge in reactor almost all changes redness into.
Claims (6)
1. an anaerobic ammonia oxidation reactor quick start method for reinforcement sludge hydrolysis, is characterized in that, comprise the following steps:
(1) choose granule sludge, rinse organics removal with phosphoric acid buffer;
(2) add the mixed solution of ammonia and nitrite, in described ammonia and the mixed solution of nitrite, ammonia density is 100 ~ 150mg/L, and nitrite concentration is 100 ~ 200mg/L, all in nitrogen; Keep anoxia condition, leave standstill after mixing, make the heterotrophic bacterium fast hydrolyzing in mud dead, treat that supernatant liquor is smelly, blackening, supernatant liquor is inclined to, then the mud after leaving standstill with phosphoric acid buffer cleaning, the organism that sludge hydrolytic discharges is cleaned;
(3) repetitive operation step (2) at least 1 time;
(4) mud obtained after step (3) process is added anaerobic ammonia oxidation reactor, keep anoxic condition in reactor, the control water inlet ammonia of reactor and the initial concentration of nitrite are 150 ~ 200mg/L, all in nitrogen, hydraulic detention time is 4 ~ 8h, makes the heterotrophic bacterium hydrolysis self-dissolving in mud; Control reaction zone fluid surface upflow velocity is 6.3 ~ 12.7cm/h simultaneously, and the organism of the floc sludge formed after sludge hydrolytic and release is washed out reactor rapidly;
(5) mode simultaneously added by quantitative flow to be added dilute alkali liquid to reactor bottom stream, and reinforcement sludge is hydrolyzed, and alleviates because being hydrolyzed caused acidification, adds diluted acid, alleviate because of the alkalinization caused by denitrification to reactor middle and upper part stream.
2. the anaerobic ammonia oxidation reactor quick start method of reinforcement sludge hydrolysis according to claim 1, it is characterized in that: the granularity chosen in step (1) is 1 ~ 4mm, density is not less than 1.05g/mL, and settling velocity is not less than 20m/h.
3. the anaerobic ammonia oxidation reactor quick start method of reinforcement sludge hydrolysis according to claim 1, is characterized in that: step (1) and (2) middle phosphate buffer density are 1mmol/L, pH is 7.
4. the anaerobic ammonia oxidation reactor quick start method of reinforcement sludge hydrolysis according to claim 1, it is characterized in that: described anaerobic ammonia oxidation reactor is upflow anaerobic sludge blanket reactor, the blade diameter length ratio of reaction zone is 1:10 ~ 1:15, mud add-on is 2/3 ~ 4/5 of reaction zone volume, and working temperature is set to 30 ~ 37 DEG C.
5. the anaerobic ammonia oxidation reactor quick start method of reinforcement sludge hydrolysis according to claim 1, it is characterized in that: the sig water in step (5) is the bicarbonate solution of 1.5 ~ 3.0g/L, flow acceleration is 30 ~ 50mL/ (Ld).
6. the anaerobic ammonia oxidation reactor quick start method of reinforcement sludge hydrolysis according to claim 1, it is characterized in that: the diluted acid in step (5) is hydrochloric acid or the sulphuric acid soln of 2mmol/L ~ 5mmol/L, flow acceleration is 20 ~ 40mL/ (Ld).
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| CN104556356B (en) * | 2014-12-29 | 2016-09-07 | 中南大学 | A kind of method of quick startup short distance nitration reactor |
| CN105502649B (en) * | 2015-11-25 | 2018-03-30 | 中南大学 | A kind of method alleviated anaerobic ammonium oxidation granular sludge and floated |
| CN105384320B (en) * | 2015-11-25 | 2018-08-17 | 中南大学 | A method of improving nitrosation reactor sludge settling property |
| CN110615525B (en) * | 2018-06-20 | 2022-07-12 | 中国石油化工股份有限公司 | Method for enriching anaerobic ammonium oxidation bacteria and application |
| CN110615526B (en) * | 2018-06-20 | 2022-03-29 | 中国石油化工股份有限公司 | Starting method of anaerobic ammonia oxidation process |
| CN115072866A (en) * | 2022-07-15 | 2022-09-20 | 广东轻工职业技术学院 | Rapid starting operation method of anaerobic ammonia oxidation process |
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| JP4945891B2 (en) * | 2004-10-18 | 2012-06-06 | 株式会社日立プラントテクノロジー | Operation method of anaerobic ammonia oxidation equipment |
| CN102897910B (en) * | 2012-10-24 | 2013-10-30 | 北京工业大学 | Anaerobic ammonia oxidation process start and high-efficiency operation method for treating urban domestic sewage |
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