CN104370367A - Method for pretreating textile dyeing wastewater containing high-concentration sulfate by coupling catalytic iron with hydrolysis and acidification - Google Patents
Method for pretreating textile dyeing wastewater containing high-concentration sulfate by coupling catalytic iron with hydrolysis and acidification Download PDFInfo
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- CN104370367A CN104370367A CN201410562109.4A CN201410562109A CN104370367A CN 104370367 A CN104370367 A CN 104370367A CN 201410562109 A CN201410562109 A CN 201410562109A CN 104370367 A CN104370367 A CN 104370367A
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- catalytic iron
- iron material
- acidification
- hydrolysis
- catalytic
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
- C02F1/705—Reduction by metals
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to a method for pretreating textile dyeing wastewater containing high-concentration sulfate by coupling catalytic iron with hydrolysis and acidification. A catalytic iron material is added into a hydrolysis-acidification coupled reaction tank and operates in two modes (fixed mode and mobile mode). The technical scheme is as follows: the method comprises the following steps: (1) preparation of catalytic iron material: preparing a corresponding catalytic iron material according to the characteristics of wastewater and varieties of pollutants; (2) setting a hydrolysis-acidification coupled reaction tank, and adding the catalytic iron material into the hydrolysis-acidification coupled reaction tank; (3) sending high-concentration SO4<2-> textile dyeing wastewater into the hydrolysis-acidification coupled reaction tank filled with the catalytic iron material, and controlling the hydraulic retention time at 2-10 hours and the pH value of the influent water at 5.0-10.5; and (4) carrying out aerobic biological treatment on the effluent water which is pretreated by the catalytic iron and hydrolysis-acidification coupled reaction tank. The catalytic iron material and hydrolysis-acidification are coupled to pretreat the textile dyeing wastewater containing high-concentration SO4<2-> so as to generate synergistic effect, thereby enhancing the SO4<2-> removal rate in the wastewater; the method lowers the content of sulfides and reduces the inhibition of the toxic organic matters and sulfides on the microbes; and the coagulation and modification actions of the iron ions are utilized to promote the whole biochemical reaction.
Description
Technical field
The present invention relates to Water Pollution Control Engineering field, be specifically related to a kind of sewerage pretreatment method, particularly use the pre-treatment of catalytic iron coupling hydrolysis acidification technique containing high density SO
4 2-the method of textile printing and dyeing wastewater.
Background technology
Textile printing and dyeing wastewater, because quantity discharged is large, water quality is complicated, intractability is high, becomes the Focal point and difficult point of waste water treatment technical study.For improving the biodegradability of textile printing and dyeing wastewater, need to carry out pre-treatment to waste water.More common technique is " ferrous sulfate coagulation+acidication " technique.Ferrous sulfate is coagulating agent common and the most cheap and easy to get, and its solution is in acid; And textile printing and dyeing wastewater is in alkalescence, the pH value regulating waste water can be avoided thus, save cost.Macromolecular substance, as the effective preprocessing means of one, can be decomposed into small-molecule substance by acidication, improves the biodegradability of waste water, reduces the difficulty of follow-up aerobic treatment.
Find in Practical Project, because textile printing and dyeing process adds a large amount of sodium sulfate, coagulating waste water process adds ferrous sulfate also with SO simultaneously
4 2-add, SO in causing acidication pre-treatment to intake
4 2-content very high.Acidication, as the first two stage of anaerobic process, is an amphimicrobian process.Sulfate reduction Pseudomonas anerobe, can sulphate reducing be sulfide, utilize organism for hydrogen donor, in the process of sulphate reducing, obtain energy.In anaerobic reactor, vitriol can be used as electron acceptor(EA) by sulphate reducing bacteria (SRB), is finally reduced to hydrogen sulfide.Cross high-sulfate to exist, stimulate and impel the propagation of sulfatereducting bacteria, thus producing a large amount of hydrogen sulfide.The solubleness of hydrogen sulfide in water is very high, every gram of S
2-be equivalent to 2gCOD.Hydrogen sulfide is toxic, can produce restraining effect to microorganism, is unfavorable for that biochemical reaction normally carries out.Fact proved, although reactor for hydrolysis and acidification is not strict anaerobic reactor, the sulfate wastewater of high density still can stimulate the growth of sulphate reducing bacteria, produces a large amount of S
2-, not only cause the COD clearance of waste water to decline, and the serious vital movement suppressing acidication bacterium, therefore S
2-removal be a problem demanding prompt solution.
Summary of the invention
Object of the present invention, being by catalytic iron being coupled with acidication, realizing S in waste water
2-removal and poison organic reduction and transform, improve acidication pretreating effect; The scope of application is for containing high density SO
4 2-textile printing and dyeing wastewater pre-treatment.
A kind of catalytic iron coupling hydrolysis acidification pre-treatment that the present invention proposes is containing the method for high concentration sulphate textile printing and dyeing wastewater, and concrete steps are as follows:
(1) prepare catalytic iron material, prepare corresponding catalytic iron material according to the characteristic sum pollutant kind of waste water; Described catalytic iron material, adopt iron surface copper facing bimetallic system, copper weight of iron ratio should control at (0.1 – 0.3): 100; Or adopting copper scale and iron filings mixed system, copper weight of iron ratio should control at (1 – 3): 100;
(2) acidication coupling reaction pond is set, in acidication coupling reaction pond, adds the catalytic iron material that step (1) obtains;
(3) enter containing high concentration sulphate textile printing and dyeing wastewater the acidication coupling reaction pond that step (2) placed catalytic iron material, controlling hydraulic detention time is 2 – 10h; Inlet flow-patterm is 5.0 – 10.5;
(4) Aerobic biological process is carried out again through the pretreated water outlet of catalytic iron and acidication coupling reaction pond.
In the present invention, described catalytic iron material is fixed in acidication coupling reaction pond, makes fixed reaction bed, and it is 0.05 – 0.4kg/m that catalytic iron material adds rate
3; Or catalytic iron material is by stirring arm forced movement, make movable bed, it is 0.02 – 0.1kg/m that catalytic iron material adds rate
3.
Catalytic iron is coupled with acidication by method of the present invention, be not play separately both effect, but produce the synergy of synergy: the 1. fast restore effect of catalytic iron, can reduce to poison organism or heavy metal to the suppression of microorganism and murder by poisoning; The Fe of reduction by catalytic iron generation simultaneously
2+can with S
2-generate FeS precipitation, reduce S
2-the murder by poisoning of microorganism is suppressed, improves the processing efficiency of acidication.2. Fe
2+cell membrane permeability can be increased, accelerate the absorption of nutritive substance, and as the integral part of electron transport chain, participate in the transmission of electronics, promote biochemical reaction; Also there is coagulation and surface modification effect simultaneously, improve flocculation or the carrier surface forming biofilm property of bacterium, promote active sludge precipitation.3. the coupled modes of integration can be imitated and be reduced structures floor space, predigested running and management maintenance operation.
Embodiment
Embodiment 1:pH slant acidity textile printing and dyeing wastewater
Intermetallic composite coating waste product iron filings (are commonly called as: iron plane flower, material is carbon steel) and (thick 0.05 to 0.4mm) leftover bits, the mechanically grating of cold rolling red copper pool, maximum path length is no more than 600mm, add in reaction tank with iron copper mass than 100:1 Homogeneous phase mixing, dosage is 0.03kg/m
3, establish dull and stereotyped slurry bottom pond, catalytic iron material microinching, forms campaign-styled reaction bed.High density SO
4 2-textile printing and dyeing wastewater enters the acidication coupling reaction pond being provided with catalytic iron material, and inlet flow-patterm is 5.0.Without dissolved oxygen in acidication coupling reaction pond, hydraulic detention time controls at 2.0h.
Treatment effect: water outlet COD clearance is 26.6%, SO
4 2-clearance is 40.6%, S
2-concentration is 12.1mg/L.
Embodiment 2:pH meta-alkalescence textile printing and dyeing wastewater
Adopting the campaign-styled reaction bed that example 1 is identical, only changing iron copper mass than being 100:3.High density SO
4 2-textile printing and dyeing wastewater enters catalytic iron and acidication coupling reaction pond, and inlet flow-patterm is 10.5.Without dissolved oxygen in acidication coupling reaction pond, hydraulic detention time controls at 10h.
Treatment effect: water outlet COD clearance is 40.3%, SO
4 2-clearance is 62.7%, S
2-concentration is 0.00mg/L.
Embodiment 3: fixed-bed reactor
Adopt the iron material that example 1 is identical, by the mode of electroless plating, 0.3% bronze medal simple substance is plated in iron filings surface, form catalytic iron material, it is 0.20 kg/m that mechanically compress is prepared into tap density
3filler.High density SO
4 2-textile printing and dyeing wastewater enters catalytic iron and acidication coupling reaction pond, and inlet flow-patterm is 8.4.Without dissolved oxygen in acidication coupling reaction pond, hydraulic detention time controls at 2.0h.
Treatment effect: water outlet COD clearance is 32.6%, SO
4 2-clearance is 38.9%, S
2-concentration is 9.46mg/L.
Embodiment 4: movable bed reactor
Adopt the catalytic iron material preparation method that example 3 is identical; Adopt the campaign-styled reaction bed of example 1, only changing dosage is 0.02kg/m
3.High density SO
4 2-textile printing and dyeing wastewater enters catalytic iron and acidication coupling reaction pond, and inlet flow-patterm is 8.4.Without dissolved oxygen in acidication coupling reaction pond, hydraulic detention time controls at 10h.
Treatment effect: water outlet COD clearance is 42.6%, SO
4 2-clearance is 68.9%, S
2-concentration is 0.00mg/L.
Embodiment 5: copper-steel material material mixing fixed-bed reactor
Adopt iron and copper product that example 1 is identical, it is 0.40 kg/m that mechanically compress is prepared into tap density
3filler.High density SO
4 2-textile printing and dyeing wastewater enters catalytic iron and acidication coupling reaction pond, and inlet flow-patterm is 8.4.Without dissolved oxygen in acidication coupling reaction pond, hydraulic detention time controls at 10h.
Treatment effect: water outlet COD clearance is 43.7%, SO
4 2-clearance is 69.4%, S
2-concentration is 0.00mg/L.
Embodiment 6: copper-steel material material hybrid motion bed bioreactor
Adopt the campaign-styled reaction bed that example 1 is identical, only changing dosage is 0.05 kg/m
3.High density SO
4 2-textile printing and dyeing wastewater enters catalytic iron and acidication coupling reaction pond, and inlet flow-patterm is 8.4.Without dissolved oxygen in reaction tank, hydraulic detention time controls at 2.0h.
Treatment effect: water outlet COD clearance is 18.6%, SO
4 2-clearance is 38.3%, S
2-concentration is 8.3mg/L.
Claims (2)
1. the pre-treatment of catalytic iron coupling hydrolysis acidification is containing a method for high concentration sulphate textile printing and dyeing wastewater, it is characterized in that concrete steps are as follows:
(1) prepare catalytic iron material, prepare corresponding catalytic iron material according to the characteristic sum pollutant kind of waste water; Described catalytic iron material, adopt iron surface copper facing bimetallic system, copper weight of iron ratio should control at (0.1 – 0.3): 100; Or adopting copper scale and iron filings mixed system, copper weight of iron ratio should control at (1 – 3): 100;
(2) acidication coupling reaction pond is set, in acidication coupling reaction pond, adds the catalytic iron material that step (1) obtains;
(3) enter containing high concentration sulphate textile printing and dyeing wastewater the acidication coupling reaction pond that step (2) placed catalytic iron material, controlling hydraulic detention time is 2 – 10h; Inlet flow-patterm is 5.0 – 10.5;
(4) Aerobic biological process is carried out again through the pretreated water outlet of catalytic iron and acidication coupling reaction pond.
2. catalytic iron coupling hydrolysis acidification according to claim 1 pre-treatment is containing the method for high concentration sulphate textile printing and dyeing wastewater, it is characterized in that described catalytic iron material is fixed in acidication coupling reaction pond, make fixed reaction bed, it is 0.05 – 0.4kg/m that catalytic iron material adds rate
3; Or catalytic iron material is by stirring arm forced movement, make movable bed, it is 0.02 – 0.1kg/m that catalytic iron material adds rate
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562109.4A CN104370367A (en) | 2014-10-22 | 2014-10-22 | Method for pretreating textile dyeing wastewater containing high-concentration sulfate by coupling catalytic iron with hydrolysis and acidification |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562109.4A CN104370367A (en) | 2014-10-22 | 2014-10-22 | Method for pretreating textile dyeing wastewater containing high-concentration sulfate by coupling catalytic iron with hydrolysis and acidification |
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| CN104370367A true CN104370367A (en) | 2015-02-25 |
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| CN201410562109.4A Pending CN104370367A (en) | 2014-10-22 | 2014-10-22 | Method for pretreating textile dyeing wastewater containing high-concentration sulfate by coupling catalytic iron with hydrolysis and acidification |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104926039A (en) * | 2015-06-19 | 2015-09-23 | 王桂霞 | Method for treating printing and dyeing wastewater |
| CN115403138A (en) * | 2021-05-26 | 2022-11-29 | 上海泓济环保科技股份有限公司 | Method for treating high-sulfate pharmaceutical wastewater by coupling iron-based material with anaerobic organisms |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348314A (en) * | 2008-09-12 | 2009-01-21 | 镇江市水业总公司 | Catalytic ion reduction and anaerobic hydrolytic acidification cooperated industrial wastewater pretreatment method |
| JP5238002B2 (en) * | 2010-09-16 | 2013-07-17 | 水ｉｎｇ株式会社 | Organic waste water treatment apparatus and treatment method |
| CN103359897A (en) * | 2013-08-07 | 2013-10-23 | 山东太平洋环保有限公司 | Process and device for treating high-concentration sulfate radical textile-dyeing wastewater |
-
2014
- 2014-10-22 CN CN201410562109.4A patent/CN104370367A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348314A (en) * | 2008-09-12 | 2009-01-21 | 镇江市水业总公司 | Catalytic ion reduction and anaerobic hydrolytic acidification cooperated industrial wastewater pretreatment method |
| JP5238002B2 (en) * | 2010-09-16 | 2013-07-17 | 水ｉｎｇ株式会社 | Organic waste water treatment apparatus and treatment method |
| CN103359897A (en) * | 2013-08-07 | 2013-10-23 | 山东太平洋环保有限公司 | Process and device for treating high-concentration sulfate radical textile-dyeing wastewater |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104926039A (en) * | 2015-06-19 | 2015-09-23 | 王桂霞 | Method for treating printing and dyeing wastewater |
| CN115403138A (en) * | 2021-05-26 | 2022-11-29 | 上海泓济环保科技股份有限公司 | Method for treating high-sulfate pharmaceutical wastewater by coupling iron-based material with anaerobic organisms |
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Application publication date: 20150225 |