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CN107540154A - Modifying porcelain method - Google Patents

Modifying porcelain method Download PDF

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Publication number
CN107540154A
CN107540154A CN201710506283.0A CN201710506283A CN107540154A CN 107540154 A CN107540154 A CN 107540154A CN 201710506283 A CN201710506283 A CN 201710506283A CN 107540154 A CN107540154 A CN 107540154A
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CN
China
Prior art keywords
water
fenton
molysite
treatment
dyeing waste
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Pending
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CN201710506283.0A
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Chinese (zh)
Inventor
崔文圭
韩相
韩一相
琴墉燮
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World's Water Treatment World
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World's Water Treatment World
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Publication of CN107540154A publication Critical patent/CN107540154A/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/70—Treatment of water, waste water, or sewage by reduction
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/02—Specific form of oxidant
    • C02F2305/026—Fenton's reagent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

The present invention relates to modifying porcelain method,Above-mentioned modifying porcelain method is characterised by,A small amount of molysite is put into the basic dyeing waste water of inflow and preceding for the first time handle is carried out in the state of Fenton reduction,Dyeing waste-water through first time pre-treatment is carried out to carry out Air Exposure after neutralisation treatment,Carry out second of bioremediation of decomposing organic matter by using microbial activity to be removed,Dyeing waste-water is set to put into molysite after being in strong basicity state and remove hard-decomposed polluter by third time Fenton method of reduction treatment again,And dyeing waste-water is set to put into molysite after being in highly acid state again,Removed using the 4th Fenton oxidation processing method come final by biological treatment and Fenton method of reduction treatment come after the reluctant hard-decomposed polluter of residual,PH is adjusted to 7.5 and discharged.

Description

Modifying porcelain method
Technical field
The present invention relates to modifying porcelain method, more specifically, above-mentioned modifying porcelain method is characterised by, A small amount of molysite is put into pre-treatment step to carry out first time pre-treatment, carried out after neutralisation treatment second biological processes it Afterwards, dyeing waste-water is handled using the reduction treatment of third time Fenton, the 4th Fenton oxidation processing method.
The present invention as described above, has following effect：When being handled before carrying out for the first time, pass through Fenton reduction treatment The removal efficiency of organic matter and EG during improving second of biological processes, carry out carrying out third time sweet smell after biological processes Reduction treatment, therefore can reduce using medicine and treatment effeciency can be increased, in addition using the 4th Fenton oxidation at Reason come remove by second of biological processes or the reduction treatment of third time Fenton also because reactivity is low be difficult to remove it is micro- The organic substance of amount, hard-decomposed polluter and PVA etc., and can be reclaimed from molysite precipitate reduction thing sharp again after molysite With, and a part for water is handled during by carrying out neutralisation treatment to first time pre-treatment water using the 4th Fenton oxidation, to subtract The usage amount of few oxidant.
Background technology
For dyeing waste-water, because the form of the fiber of production is with the change of season, prevalence, consumer demand etc. And change, so production process also changes at any time therewith, thus while being difficult to determine the various pollutions included in dyeing waste-water The amount of material, but the key property of the dyeing waste-water generally entered to modifying porcelain field flow is, has 40 DEG C to 80 DEG C Temperature；PH is in 8.5 to 10 or so strong basicity；Show that high chemical oxygen demand (chemical oxygen demand, COD) is dense Degree and biochemical oxygen demand (BOD) (Biochemical Oxygen Demand, BOD) concentration；And comprising as biologically hard-decomposed The starch and EG of material, because be difficult to decompose comprising a variety of dyestuffs for being capable of combined colors colourity, decompose as chemically difficult PVA, TPA of contact scar material etc. and some toxicants.
It is disclosed for the biological treatment of organics removal and for handling difficult decomposition in KR published patent The various sides of the ozone oxidation of contact scar material, electric decomposition, microwave irradiation, plasma utilization decomposition, photochemical catalyst oxidation etc. Method is as the method for handling the polluter in the above-mentioned dyeing waste-water with various characteristics.
Especially, a variety of methods for handling such as ozone oxidation of hard-decomposed polluter, electricity decomposes can basis The character of the dyeing waste-water of inflow and there is very big gap in terms for the treatment of effeciency, therefore be not main methods but Widely used in a part as aid in treatment method.
Dye is described in KR published patent No. 10-1996-0031353 (Korean Patent mandate the 10-0145467th) Color waste water Fenton (Fenton) method for oxidation is as the method for stably and effectively handling hard-decomposed polluter, specifically Ground, after biological method first time TREATMENT OF DYEING WASTEWATER WITH, acid solution is put into order to carry out Fenton oxidation processing, is made Molysite and hydrogen peroxide are put into after the highly acid state, hard-decomposed polluter is reacted with molysite to precipitate It is removed after into trivalent iron molysite deposition thing.
The good treatment efficiency of above-mentioned dyeing waste-water Fenton oxidation method although hard-decomposed polluter, but exist as follows Problem：In order to strengthen the highly acid and oxidability as Fenton oxidation condition of whole dyeing waste-water, and consumed as The high price drug expenditure of sulfuric acid, hydrogen peroxide etc. is high, is not easy because being not easy oxidized TPA or dyestuff etc. under acid state by oxygen Change and treatment effeciency is low, and due to that can not recycle the molysite put into, thus iron salt oxidization reaction precipitate each is formed as Sludge (sludge), so as to increase the yield of dehydrated sludge cake, and then increase the processing cost of dehydrated sludge cake, be especially very difficult to remove Colourity.
Described in KR published patent No. 10-2013-0086598 (license the 10-01379374th) as follows Technology, i.e. in order to improve above mentioned problem, and alkaline solution is put into the dyeing waste-water of inflow, by pH be promoted to 10.5 to 11 or so, it is allowed to put into molysite after being in reducing condition, hard-decomposed polluter is reacted with molysite, be precipitated as divalent The sediment of iron is removed, and the dyeing waste-water to eliminating hard-decomposed polluter carries out biological processes to remove Discharged after organic matter, above-mentioned molysite deposition thing is dissolved using sulfuric acid and is prepared into iron salt solutions again afterwards to recycle.
Compared with above-mentioned dyeing waste-water Fenton oxidation method, above-mentioned dyeing waste-water molysite recovery and treatment method without using for Prepare the hydrogen peroxide that largely uses in the Fenton oxidation method of trivalent molysite, therefore drug consumption is few, so can from as Molysite used in being reclaimed in the molysite deposition thing of divalent molysite simultaneously recycles, so as to not only with outstanding economy but also with easily In decompose colourity the advantages of, but there are the following problems：Due to handling difficulty using molysite recovery method as first time step Decomposability polluter simultaneously uses biological treatment as second of step, therefore when progress first time Fenton reduction treatment When, a part for the organic matter in dyeing waste-water is mixed and precipitated with molysite, so that for handling hard-decomposed pollution The input amount increase of the molysite of material, and then be mixed into water is discharged based on biological treatment or Fenton method of reduction treatment Carry out reluctant PVA etc., cause the water quality inferiority of final discharge water.
The content of the invention
(inventing problem to be solved)
In order to solve problem as described above, it is an object of the present invention to
Pre-treatment is carried out with molysite using the reproducibility of the basic dyeing waste water of inflow, is intricately coagulated with organic matter to disconnect The chain for the hard-decomposed polluter got together, so as to improve the processing effect of organic matter and EG in biological processes facility Rate.
Another object of the present invention is to handle the dyeing waste-water through pre-treatment, first to remove using biological method Organic matter and EG in dyeing waste-water, thus suppress excessively to be dropped in for handling hard-decomposed polluter because of organic matter The molysite amount of Fenton treatment facility, and then reduce EG and reduce Fenton treatment effeciency.
Another object of the present invention is to the dyeing for being handled organics removal first using Fenton method of reduction treatment is given up Water, needed to easily remove TPA etc. in hard-decomposed polluter in a reduction state for Fenton oxidation processing The material of the oxidant of the high price as hydrogen peroxide, so as to reduce medicine usage amount, and then improve colourity, in iron Molysite is regenerated in salt precipitate reduction thing to recycle afterwards.
The further object of the present invention is, utilizing at biology in dyeing waste-water is removed in Fenton oxidation process Reason method or the reluctant PVA of Fenton method of reduction treatment etc., to improve the water quality of discharge water, and disclose economical Modifying porcelain method.
(measure used by solving the problems, such as)
In order to realize purpose as described above,
The present invention modifying porcelain method be characterised by, including：Pre-treatment step S10, flow into dyeing waste-water A Water leg 110, and put into molysite (Fe2SO4) iron ion is combined with the hard-decomposed polluter in dyeing waste-water to be formed Floccule；Biological processes step S20, make to flow into the laggard of pH regulating tanks 210 by pre-treatment step S10 dyeing waste-water A Row neutralisation treatment, and be allowed to flow into aeration tank 220 and carry out Air Exposure；Fenton reduction treatment step S30, to reduction regulating tank 320 transfers pass through biological processes step S20 dyeing waste-water A and put into molysite, are carried out afterwards to the transfer of reduction reaction groove 330 Alkalization is handled, and iron ion is combined with the hard-decomposed polluter in dyeing waste-water to form floccule；Molysite reclaims Step S60, in Fenton reduction treatment step S30 caused floccule be condensed precipitation process and to acid reaction groove 610 Transfer, is prepared into iron salt solutions, upper clear liquid and sediment is separated into by equipment for separating liquid from solid 630 again under strongly acidic conditions, And transfer above-mentioned upper clear liquid to iron salt solutions accumulator tank 640 and again act as iron salt solutions afterwards to use, above-mentioned sediment passes through Discharged after dewater treatment；And drain steps S50, it is displaced through Fenton reduction treatment step S30 to neutralization reaction groove 510 The dyeing waste-water A of processing, and discharged after neutralisation treatment.
Preferably, after Fenton reduction treatment step S30 is carried out, including：Fenton oxidation processing step S40, to oxidation The transfer of regulating tank 420 passes through Fenton reduction treatment step S30 dyeing waste-water A and puts into acid solution to be carried out at acidification afterwards Reason, and floccule is formed to be condensed to input molysite after the transfer of oxidation reaction groove 430, and by oxidation reaction；Upper State in drain steps S50, the dyeing waste-water A to the transfer of neutralization reaction groove 510 by Fenton oxidation processing step S40 processing, and By being discharged after neutralisation treatment.
Preferably, including：Dehydration S70, receive in second of coagulative precipitation groove 230 in biological processes step In S20 caused floccule precipitated come caused by sediment, the caused sediment and the in molysite recycling step S60 In four coagulative precipitation grooves 440 in Fenton oxidation processing step S40 caused floccule precipitated come caused by precipitate Thing, and using dehydrator 710 discharge after dewater treatment.
Preferably, a part of the dyeing waste-water A by Fenton oxidation processing step S40 is transferred to pH regulating tanks (210) it is used in the dyeing waste-water A neutralized by pre-treatment step S10.
(The effect of invention)
The present invention as described above, has following effect：When being handled before carrying out for the first time, pass through Fenton reduction treatment The removal efficiency of organic matter and EG during improving second of biological processes, due to carrying out after biological processes are carried out Fenton reduction treatment three times, therefore can reduce using medicine and treatment effeciency can be increased, in addition using the 4th Fenton Oxidation processes are also difficult to remove by second of biological processes and the reduction treatment of third time Fenton because reactivity is low Micro organic substance, hard-decomposed polluter and PVA for removing etc., and can be reclaimed from molysite precipitate reduction thing molysite it After recycle, and one of water is handled during by carrying out neutralisation treatment to first time pre-treatment water using the 4th Fenton oxidation Point, to reduce the usage amount of oxidant.
Brief description of the drawings
Fig. 1 is the overall flow figure according to the modifying porcelain method of the present invention.
Fig. 2 is the formation picture of device according to the modifying porcelain method of the present invention.
(explanation of reference)
S10：Pre-treatment step；S20：Biological processes step；S30：Fenton reduction treatment step；
S40：Fenton oxidation processing step；S50：Drain steps；S60：Molysite recycling step；
S70：Dehydration；100：Pre-treatment facility；110：Water leg；120：Molysite puts into nozzle；
200：Biological processes facility；210：PH regulating tanks；220：Aeration tank；230：Second of coagulative precipitation groove；
300：Fenton reduction treatment facility；310：Molysite feeding device；320：Reduce regulating tank；
330：Reduction reaction groove；340：Alkaline solution input device；350：Third time coagulative precipitation groove；
400：Fenton oxidation treatment facility；410：Acid solution input device；420：Aoxidize regulating tank；
430：Oxidation reaction groove；440：4th coagulative precipitation groove；500：Drain facility；510：Neutralization reaction groove；
520：Discharge tank；600：Molysite recvery facility；610：Acid reaction groove；620：Sour feeding device；
630：Equipment for separating liquid from solid；640：Iron salt solutions accumulator tank；700：It is dehydrated facility；710：Dehydrator
Embodiment
【Fig. 1】
As shown in figure 1, the modifying porcelain method of the present invention handles the dyeing waste-water of inflow by the steps, Include pre-treatment step S10, biological processes step S20, Fenton reduction treatment step S30, Fenton oxidation processing step S40, drain steps S50, the molysite precipitate reduction thing being deposited in Fenton reduction treatment step S30 is in molysite recycling step By separation of solid and liquid in S60, upper clarification of water regenerates molysite and is stored in after Fig. 2 iron salt solutions accumulator tank 640, in preceding processing step It is reused in rapid S10, Fenton reduction treatment step S30, Fenton oxidation processing step S40, and precipitate reduction thing is in dehydration step With respectively in caused sediment and the molysite oxygen in biological processes step S20 and Fenton oxidation processing step S40 in rapid S70 Change sediment obtain dewater treatment together, above-mentioned each mutual organic linking of equipment and formed integrated.
On the other hand, a part for the processing water through Fenton oxidation processing step S40 is flowed into biological processes step S20, i.e., flowed into Fig. 2 pH regulating tanks 210, can be used for neutralizing the processing water through pre-treatment step S10.
Here, pre-treatment step S10 is performed in Fig. 2 preceding processing sets 100, S20 is Fig. 2's for biological processes step Being performed in biological processes facility 200, Fenton reduction treatment step S30 is performed in Fig. 2 Fenton reduction treatment facility 300, Fenton oxidation processing step S40 is performed in Fig. 2 Fenton oxidation treatment facility 400, and discharges of the drain steps S50 in Fig. 2 is set Performed in applying 500, molysite recycling step S60 is performed in Fig. 2 molysite recvery facility 600, and dehydration S70 is in the de- of Fig. 2 Performed in drainage facility 700.
【Fig. 2】
As shown in Fig. 2 dyeing waste-water A flows into water leg 110, the dyeing occurred according to the inlet time of waste water or waste water Process, using the temperature deviation and pH for being about 25 DEG C to 45 DEG C as 8.5 to 11 between inhomogeneous state flow into, therefore, in order to Definitely regulation needs dyeing waste-water A to be processed character, and is stirred in the state of being stayed in water leg 110 with temporary transient storage Mix, then it is 9 to 10 or so to homogenize to realize pH, and now, such as EG hard-decomposed polluter is with having in dyeing waste-water Machine thing is twisted and mixed, therefore in biological processes facility 200, when using biological treatment come TREATMENT OF DYEING WASTEWATER WITH A When, because of hard-decomposed polluter chain length, and microorganism decomposition EG or organic matter are hindered, so as to reduce the processing of organic matter effect Rate, thus when using molysite input nozzle 120 to the input ratio of water leg 110 as being present in the whole hard-decomposed of dyeing waste-water Polluter processing needed for iron salt concentration 800ppm to 1200ppm 30% small 200ppm to 400ppm concentration iron Salt, then because of the alkalescence that the pH for the dyeing waste-water being homogenized in water leg 210 is 9 to 10 or so, and the molysite put into is gone back Original, so as to enter the first time pre-treatment of the marriage chain for the hard-decomposed polluter for being about to be combined with organic matter disconnection, and then Organic matter or EG etc. decomposition efficiency can be improved in the biological processes facility 200 of second for the treatment of facility.
Dyeing waste-water A through pre-treatment is flowed into biological processes facility 200, and pH7 is adjusted in pH regulating tanks 210 extremely After 8, flow into aeration tank 220 and stopped for a long time in aeration tank 220, and the activity change of aerobic microorganism because of aeration It must enliven, so that by the organic matter in microorganism decomposition dyeing waste-water A or starch, EG etc., in second of coagulative precipitation groove 230 Microorganism corpse or the organic matter not being decomposed are precipitated to bottom and after being removed, are turned into sediment and eliminate organic matter The dyeing waste-water A that handles of warp second.
When the dyeing waste-water A for eliminating organic matter of the upper clarification of water as second of coagulative precipitation groove 230 reduces to Fenton Treatment facility 300 flows into, and after the molysite (Fe2SO4) from molysite feeding device 310 is put into reducing regulating tank 320, The reduction reaction groove 330 of rear end is flowed into, then puts into alkaline solution from alkaline solution input device 340 and mixes, so that dyeing is useless Water A pH is in the reducing environment of 9.5 to 10.5 alkaline state, then the Fe in molysite2+Composition because of strong basicity reducing environment and With SO4 2-After base separation, combined with the hard-decomposed polluter in dyeing waste-water rapidly to form floccule, and then particle becomes Condense and precipitate in the third time coagulative precipitation groove 350 of rear end rapidly while big, and be used as and include hard-decomposed pollutant The molysite precipitate reduction thing of matter is removed, and is handled through such third time, is turned into and eliminate most hard-decomposed pollution The dyeing waste-water by third time processing of material and colourity.
On the other hand, molysite (Fe2SO4) in and Fe2+The SO of a part for separation4 2-Base, carried out once again with NaOH bases anti- Should, make Na+With OH-Base separates, now separated OH-Base carries out free radical and decomposes the colourity of discharge water.
As third time coagulative precipitation groove 350 upper clarification of water the dyeing waste-water A by third time processing to Fenton oxidation Treatment facility 400 flows into, and puts into acid solution using acid solution input device 410 in regulating tank 420 is aoxidized, and maintains pH 2.5 to 3.5 highly acid state, and put into iron salt solutions in the oxidation reaction groove 430 of rear end, then it is strong because of the effect of molysite Strong carry out Fenton oxidation, so as to the hard-decomposed polluter that remains in the dyeing waste-water A through third time processing and micro have Machine thing and reacted cotton-shaped to be formed by biological treatment and Fenton method of reduction treatment come PVA for being difficult to remove etc. Materialization, and then be removed in the 4th coagulative precipitation groove 440 with sediment, thus turn into the dyeing through the 4th processing and give up Water A.
The dyeing waste-water through the 4th processing as the upper clarification of water of the 4th coagulative precipitation groove 440 is pH left for 4 to 5.5 The right waste water by purification, therefore neutralisation treatment is carried out in the neutralization reaction groove 510 in drain facility 500, so that pH is in 7.5, discharge tank 520 is stored in afterwards, finally to the outside drain B of modifying porcelain field.
On the other hand, such as PVA material is not remained in the hard-decomposed polluter of the dyeing waste-water of inflow, therefore In the case of without Fenton oxidation processing, the upper clarification of water of above-mentioned third time coagulative precipitation groove 350 is directly to as drain facility 500 Neutralization reaction groove 510 transfer and carry out neutralisation treatment so that pH be in 7.5, discharge tank 520 is stored in afterwards, finally to dye The outside drain B of color waste water processing station.
On the other hand, although the dyeing waste-water A of strong basicity and the molysite of highly acid are reacted, it is deposited in the above-mentioned 3rd The molysite precipitate reduction thing of the secondary bottom of coagulative precipitation groove 350 remains in that the alkalescence that pH is more than 8.5, when molysite precipitate reduction thing Flowed into the acid reaction groove 610 as molysite recvery facility 600, then from the sour feeding device for being arranged on the top of acid reaction groove 610 The sulfuric acid of 620 inputs makes molysite precipitate reduction thing be in the highly acid state that pH is 1 to 2.5 or so, when this strong acid of holding During property environment, the iron (Fe in molysite precipitate reduction thing2+) composition is dissolved and dissolution, the ferrous components being dissolved carry out anti-with sulfuric acid Answer and be regenerated as molysite (Fe2SO4) solution, when the molysite precipitate reduction thing that acid reaction is carried out in acid reaction groove 610 rests on solid-liquid During separator 630, molysite precipitate reduction thing and upper clear liquid are separated into, because upper clear liquid is iron salt solutions, therefore will be above-mentioned Upper clear liquid is stored in iron salt solutions accumulator tank 640 and then degree and can used as in preceding processing facility 100, Fenton reduction treatment Facility 300, Fenton oxidation processing set the molysite needed for 400.
In addition, the precipitate reduction thing of separation is precipitated in above-mentioned equipment for separating liquid from solid 630 with second of coagulative precipitation groove 230 and the 4th coagulative precipitation groove 440 in respectively coagulative precipitation and the sediment and iron salt oxidization sediment discharged together de- Pass through in the dehydrator 701 of drainage facility 700 after dewater treatment, the outside with the state of dehydrated sludge cake to modifying porcelain field Discharge.

Claims (4)

  1. A kind of 1. modifying porcelain method, it is characterised in that including：
    Pre-treatment step (S10), dyeing waste-water (A) is flowed in into water leg (110), and put into molysite (Fe2SO4) make iron ion It is combined with the hard-decomposed polluter in dyeing waste-water to form floccule；
    Biological processes step (S20), pH regulating tanks (210) will be flowed in by the dyeing waste-water (A) of pre-treatment step (S10) Neutralisation treatment is carried out afterwards, and is allowed to flow in aeration tank (220) and carry out Air Exposure；
    Fenton reduction treatment step (S30), the dyeing waste-water (A) Jing Guo biological processes step (S20) is transferred to reduction and adjusted Section groove (320) simultaneously puts into molysite, and is transferred to progress alkalization processing after reduction reaction groove (330), makes iron ion and dyeing Hard-decomposed polluter in waste water is combined to form floccule；
    Molysite recycling step (S60), in Fenton reduction treatment step (S30) caused floccule be condensed precipitation process And transferred to acid reaction groove (610), iron salt solutions are regenerated as under strongly acidic conditions, are separated by equipment for separating liquid from solid (630) Into upper clear liquid and sediment, and transfer above-mentioned upper clear liquid to iron salt solutions accumulator tank (640) and reuse as iron salt solutions, it is above-mentioned Sediment after dewater treatment by discharging；And
    Drain steps (S50), neutralization will be transferred to instead come the dyeing waste-water (A) handled by Fenton reduction treatment step (S30) Groove (510) is answered, and discharged after neutralisation treatment.
  2. 2. modifying porcelain method according to claim 1, it is characterised in that
    After Fenton reduction treatment step (S30) is carried out, including：Fenton oxidation processing step (S40), Fenton will be passed through and reduced The dyeing waste-water (A) of processing step (S30) is transferred to oxidation regulating tank (420) and puts into acid solution and carries out afterwards at acidification Reason, input molysite after oxidation reaction groove (430) is transferred to, is formed floccule to condense by oxidation reaction,
    In above-mentioned drain steps (S50), the dyeing waste-water (A) by Fenton oxidation processing step (S40) processing is transferred to Neutralization reaction groove (510), by being discharged after neutralisation treatment.
  3. 3. modifying porcelain method according to claim 2, it is characterised in that including：
    Dehydration (S70), receive in second of coagulative precipitation groove (230) to being produced in biological processes step (S20) Floccule precipitated come caused by sediment, the caused sediment and solidifying at the 4th time in molysite recycling step (S60) In poly- stillpot (440) in Fenton oxidation processing step (S40) caused floccule precipitated come caused by sediment, And using dehydrator (710) discharge after dewater treatment.
  4. 4. the modifying porcelain method according to Claims 2 or 3, it is characterised in that Fenton oxidation processing step will be passed through Suddenly a part for the dyeing waste-water (A) of (S40) is transferred to pH regulating tanks (210) and is used in neutralization and passes through pre-treatment step (S10) dyeing waste-water (A).
CN201710506283.0A 2016-06-29 2017-06-28 Modifying porcelain method Pending CN107540154A (en)

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CN110683712A (en) * 2019-10-16 2020-01-14 花法科技有限公司 Polyamide dyeing sewage recycling treatment process
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