CN100357201C - Artificial leather effluent treating process - Google Patents
Artificial leather effluent treating process Download PDFInfo
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- CN100357201C CN100357201C CNB2005101231023A CN200510123102A CN100357201C CN 100357201 C CN100357201 C CN 100357201C CN B2005101231023 A CNB2005101231023 A CN B2005101231023A CN 200510123102 A CN200510123102 A CN 200510123102A CN 100357201 C CN100357201 C CN 100357201C
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- wastewater
- dmf
- artificial leather
- treatment
- cod
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000002649 leather substitute Substances 0.000 title claims abstract 15
- 239000002351 wastewater Substances 0.000 claims abstract description 76
- 238000011084 recovery Methods 0.000 claims abstract description 14
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000007062 hydrolysis Effects 0.000 claims abstract description 6
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 6
- 238000004062 sedimentation Methods 0.000 claims abstract description 3
- 238000005345 coagulation Methods 0.000 claims abstract 3
- 230000015271 coagulation Effects 0.000 claims abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000004821 distillation Methods 0.000 claims description 2
- 238000011010 flushing procedure Methods 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 238000001125 extrusion Methods 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 1
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 39
- 238000004065 wastewater treatment Methods 0.000 description 10
- 230000001112 coagulating effect Effects 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 7
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 239000010786 composite waste Substances 0.000 description 5
- 239000010985 leather Substances 0.000 description 5
- 238000010992 reflux Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000001311 chemical methods and process Methods 0.000 description 2
- 230000009615 deamination Effects 0.000 description 2
- 238000006481 deamination reaction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Physical Water Treatments (AREA)
Abstract
本发明公开了人造革废水处理的一种方法，根据废水中COD和DMF浓度高低选择合适的处理工艺采取分质处理方法，对COD和DMF浓度高的废水采用先进入DMF回收系统回收DMF；回收后废水进行厌氧处理；然后对DMF厌氧处理后水解产生的氨氮进行吹脱去除；吹脱去除后的废水与其它低COD浓度的人造革工艺混合废水一道再进行缺氧/好氧+混凝沉淀工艺处理。达到国家排放标准后排放。本方法对于人造革废水中高含量的DMF物质有着很好的处理效果。
The invention discloses a method for the treatment of artificial leather wastewater. According to the concentration of COD and DMF in the waste water, a suitable treatment process is selected to adopt a quality separation treatment method, and the waste water with high COD and DMF concentration is first entered into a DMF recovery system to recover DMF; after recovery Anaerobic treatment of wastewater; then stripping and removal of ammonia nitrogen produced by hydrolysis after DMF anaerobic treatment; the waste water after stripping and removal is combined with other low COD concentration artificial leather process mixed wastewater for anoxic/aerobic + coagulation sedimentation Process treatment. Discharge after reaching the national emission standard. The method has a good treatment effect on high-content DMF substances in artificial leather wastewater.
Description
Technical field
The invention belongs to the Industrial Wastewater Treatment field, more particularly is the processing of leatheroid factory effluent.
Background technology
Leatheroid waste water composition complexity, variation water quality is big, mainly contains COD, SS, DMF pollutents such as (dimethyl formamides) in the waste water.Especially towards tower waste water COD and DMF concentration 30,000～100,000mg/L, the COD of the Cleaning Wastewater of coagulating pan, accumulator tank and recycling bin and DMF concentration are 15, about 000mg/L.DMF content is higher in this class waste water, and DMF is a kind of organic solvent, and price is higher, has higher reclamation and is worth.Overhead water COD and DMF are about 1600mg/L, and DMF content is still higher, can produce a large amount of ammonia nitrogens behind the DMF anaerobic hydrolysis.
Except that containing higher concentration DMF, also contain auxiliary agent, dyestuff etc. than the difficult degradation pollutent in the leatheroid waste water, the overall complicated component of waste water has certain degree of difficulty to art breading, and single physico-chemical process or biochemical process all are difficult to up to standard.
The leatheroid method of wastewater treatment generally mixes various waste water at present, adopts the anaerobic-aerobic treatment process, this treatment process water outlet COD, NH
3-N concentration is higher, is difficult to reach the requirement of discharging standards, and the processing of leatheroid waste water must be considered the influence of a large amount of ammonia nitrogens to carrying out a biological disposal upon that produces behind the DMF anaerobic hydrolysis.
Summary of the invention:
The present invention seeks to: the various waste water at existing leatheroid production are handled respectively, to COD and DMF concentration 10, the above waste water of 000mg/L adopts minimizing and resource utilization, reduce the content of principal pollutant DMF in the waste water, adopt physical chemistry method to remove the ammonia nitrogen that the DMF anaerobic hydrolysis produces simultaneously, a large amount of ammonia nitrogens that produce behind the DMF of the processing of the leatheroid waste water consideration simultaneously anaerobic hydrolysis are to the influence of biological treatment.
Technical solution of the present invention is: a kind of method of leatheroid wastewater treatment, just select suitable treatment process to take branch matter treatment process according to COD in the waste water and DMF concentration, to COD and DMF concentration height 10, the above waste water of 000mg/L adopts minimizing and resource utilization, reduce the content of principal pollutant DMF in the waste water, as towards tower waste water COD and DMF concentration all 10, the waste water that 000mg/L is above, enter the DMF recovery system and reclaim DMF, reclaim back waste water and carry out anaerobic treatment, and the ammonia nitrogen that the posthydrolysis of DMF anaerobic treatment produces is carried out stripping remove.Waste water after stripping is removed utilizes anoxic/aerobic+coagulation-settlement process to handle with the leatheroid composite waste of other low COD and DMF concentration.
The leatheroid technology composite waste of other low COD concentration also can carry out anaerobic treatment by DMF recovery back waste water together.
Contain COD, the higher waste water of DMF concentration refers to towards the Cleaning Wastewater of tower water and coagulating pan, accumulator tank and recycling bin, the processing of DMF recovery system is through the plate-and-frame filter press extruding, and the waste water that squeezes out enters the DMF recovery system and is meant that distillation or alternate manner reclaim DMF.
Described ammonia-nitrogen desorption method is: utilize Ca (OH)
2The pH value of waste water is adjusted to 10 ~ 11, and the stripping device adopts stripping tower, and gas-water ratio is 200 ~ 400: 1.
The anaerobic treatment reactor adopts rising streaming anaerobic reactor, 15 ~ 24 hours residence time.Anaerobic-aerobic loads biologic packing material in the pond, 2 ~ 4 hours anoxic residence time, 24 ~ 36 hours aerobic residence time.Anoxic pond DO is that 0.5mg/L, Aerobic Pond DO are 2.0 ~ 4.0mg/L.The anaerobic pond temperature is 15 ~ 35 ℃, and the temperature of anoxic, Aerobic Pond is 15 ~ 38 ℃.
The present invention adopts " DMF recovery-anaerobism-ammonia-nitrogen desorption-anaerobic-aerobic (A/O) technology-coagulating sedimentation " art breading leatheroid waste water, the water outlet COD after the processing
Cr≤ 100mg/L; NH
3-N≤15mg/L; Colourity≤40 times.
Mainly by pollutent contain high density DMF waste water reclamation-anaerobism pre-treatment after mixes with other waste water, after the processing of A/O-coagulation-settlement process, reach discharging standards.
Handler's fabricate-leather method of wastewater treatment of the present invention compared with prior art has following advantage:
1. consider pollutent resource utilization and minimizing, reclaim DMF, reduce the content of principal pollutant DMF in the waste water.
2. according to the height of Pollutant levels, the anaerobism preconditioning technique of high-concentration waste water is set, has solved anaerobic degradation and the ammonia nitrogen removal of leatheroid wastewater treatment the biggest problem DMF.
3. treatment system stability and high efficiency, the water outlet after the processing can be used as the water source of reuse water, has good economic benefits.
Description of drawings
Fig. 1 is the schematic flow sheet of inventor's fabricate-leather method of wastewater treatment.
Embodiment
Each main units comprises in inventor's fabricate-leather method of wastewater treatment flow process: main kind of waste water is: collect waste water A, overhead water B and other waste water C towards tower water, coagulating pan, accumulator tank and recycling bin.A kind of leatheroid method of wastewater treatment of the present invention may further comprise the steps:
(1) water collecting basin: collect the waste water A towards tower water, coagulating pan, accumulator tank and recycling bin, water collecting pool volume is not less than the maximum emission of any waste water wherein.
(2) equalizing tank 1: collect overhead water B, 18 hours adjusting time.
(3) equalizing tank 2: collect composite waste C, 15 hours adjusting time.
(4) DMF waste water press filteration system: the waste water that contains high density DMF in catchmenting is removed foreign material in the waste water through press filteration system, and the waste water after the press filtration enters the DMF recovery system.
(5) anaerobic pond: the pressurization of waste water in the equalizing tank 1 enters anaerobic pond, and anaerobic pond adopts the rising flow reactor, and fill or filled biomass filler not the inside, and to keep certain upflow velocity, anaerobic pond hydraulic detention time be 12 ~ 24 hours.
(6) efficient deamination system: comprise that pH regulator pond, soda acid add, stripping tower.Anaerobic pond water outlet pH adjusts to 10 ~ 11, and pressurization enters stripping tower, and the stripping gas-water ratio is 200 ~ 400, and the medicament of adjusting pH adopts Ca (OH)
2And H
2SO
4
(7) anaerobic-aerobic system: composite waste carries out denitrification in anoxic pond, Aerobic Pond carries out nitration reaction, removes COD and NH in the waste water
3-N.Anoxic pond DO is lower than 0.5mg/L, hydraulic detention time 2 ~ 4 hours; Aerobic Pond DO is 2.0 ~ 4.0mg/L, hydraulic detention time 18 ~ 36 hours.System's internal reflux ratio is 200% ~ 400%, and external reflux ratio is 50% ~ 100%.Biologic packing material is installed in the anaerobic-aerobic system or biologic packing material is not installed.
(8) coagulative precipitation tank: go out remaining organism in the anaerobic-aerobic system, water outlet reaches discharging standards or further advanced treatment and reclamation.
The preferred operational conditions of handler's fabricate-leather method of wastewater treatment of the present invention is: 18 hours anaerobic pond residence time, stripping gas-water ratio 300: 1, anoxic pond 3 hours, Aerobic Pond 24 hours, internal reflux ratio 300%, external reflux ratio 75%.
The basic equipment of cell process of the present invention is prior art, and specific processing condition all provide: comprise DMF recovery-anaerobism-ammonia-nitrogen desorption-anaerobic-aerobic (A/O) technology.
Enter respectively in the water collecting basin towards tower water, accumulator tank, coagulating pan, wash water, pump up to the plate-and-frame filter press filtration, filter residue is mixed coal and is burned, filtrate flows into the storage pond, be forced into the DMF that reclaims in the recovery tower in the waste water with water pump, after the recovery, waste water and other reclaim liquid and discharge with the form of overhead water.Overhead water is forced in the anaerobic pond with water pump from flowing to equalizing tank, and the DMF in the waste water decomposes by anaerobion, produces ammonia nitrogen, enters denitrification system, is mixed into equalizing tank 2 with other waste water after the denitrogenation, and the ammonia of stripping enters ammonia recovery system.Sanitary sewage, ground wash-down water, tanning water, water coolant, ash-flushing water etc. enter equalizing tank 2, the composite waste pressurization enters the anaerobic-aerobic system in the equalizing tank 2, waste water mixes with the internal reflux mixed solution in the anoxic pond, carry out denitrification, carry out nitrated in the Aerobic Pond, thereby organism and ammonia nitrogen in the removal waste water, mixed-liquor return is to anoxic pond in the Aerobic Pond.Through after the mud-water separation, sludge part is back to anoxic pond at second pond in water outlet in the anaerobic-aerobic pond, and supernatant liquor enters that coagulative precipitation tank further purifies the back discharging or as the water source of reuse water.Leatheroid waste water is through treatment scheme shown in Figure 1, and each structures handler fabricate-leather water treatment effect sees Table 1.
Each structures treatment effect table of table 1
| The structures title | COD | BOD 5 | NH 3-N | ||||||
| Water inlet | Water outlet | Clearance (%) | Water inlet | Water outlet | Clearance (%) | Water inlet | Water outlet | Clearance (%) | |
| Equalizing tank 1 | 1800 | 1800 | - | 550 | 550 | - | 15 | 15 | - |
| Anaerobic pond | 1800 | 1000 | 44.4 | 550 | 300 | 45.5 | 15 | 360 | - |
| The deamination system | 1000 | 950 | 5.0 | - | - | - | 360 | 145 | 59.7 |
| Equalizing tank 2 | 1200 | 1200 | - | 600 | 600 | - | 100 | 100 | - |
| Anoxic pond | 1200 | 750 | 37.5 | 600 | 250 | 58.3 | - | - | - |
| Aerobic Pond | 750 | 100 | 86.7 | 250 | 20 | 92.0 | - | 15 | 85 |
| Coagulative precipitation tank | 100 | 60 | 40.0 | 20 | 10 | 50.0 | - | - | - |
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101231023A CN100357201C (en) | 2005-12-15 | 2005-12-15 | Artificial leather effluent treating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101231023A CN100357201C (en) | 2005-12-15 | 2005-12-15 | Artificial leather effluent treating process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1810685A CN1810685A (en) | 2006-08-02 |
| CN100357201C true CN100357201C (en) | 2007-12-26 |
Family
ID=36843832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101231023A Active CN100357201C (en) | 2005-12-15 | 2005-12-15 | Artificial leather effluent treating process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100357201C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830609B (en) * | 2010-05-28 | 2011-08-17 | 浙江大学 | Method for removing ammonia nitrogen from artificial leather manufacturing waste water |
| CN102295391B (en) * | 2011-08-08 | 2012-12-26 | 浙江商达环保有限公司 | PU (Poly Urethane)-leather wastewater-processing method |
| CN102583877A (en) * | 2012-01-19 | 2012-07-18 | 宜兴市环球水处理设备有限公司 | Novel paint wastewater treatment device |
| CN102923911B (en) * | 2012-11-01 | 2013-10-30 | 中国石油集团工程设计有限责任公司 | Natural gas purification plant high-concentration production wastewater treatment system and treatment method |
| CN103112951B (en) * | 2013-03-18 | 2014-04-02 | 南京大学宜兴环保研究院 | Biochemical method for treating synthetic leather wastewater containing dimethylformamide |
| JP6690197B2 (en) * | 2014-12-11 | 2020-04-28 | 三菱ケミカル株式会社 | Method and system for treating wastewater containing organic matter |
| CN105198174B (en) * | 2015-10-29 | 2018-09-11 | 南京大学盐城环保技术与工程研究院 | A kind of processing method of organic nitrogen DMF wastewater from chemical industry |
| CN105906158B (en) * | 2016-06-14 | 2019-07-26 | 华东理工大学 | A coal chemical wastewater pretreatment method combining hydrolysis acidification and ammonia nitrogen stripping |
| CN107089764B (en) * | 2017-04-25 | 2021-04-30 | 湖北绿色家园材料技术股份有限公司 | Method for utilizing waste water in polyamide production |
| CN109280564A (en) * | 2017-07-20 | 2019-01-29 | 浙江丰登化工股份有限公司 | A kind of resource utilization method of the waste water containing DMF |
| CN110451725A (en) * | 2019-08-14 | 2019-11-15 | 浙江巨能环境工程有限公司 | A kind of DMF and DMAC high-concentration waste water biological treatment system and processing method |
| CN110451733A (en) * | 2019-08-27 | 2019-11-15 | 安徽环境科技集团股份有限公司 | A kind for the treatment of process of leather-making waste water |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61125485A (en) * | 1984-11-19 | 1986-06-13 | Hitachi Zosen Eng Kk | Method for recovering dmf |
| JPH07275890A (en) * | 1994-04-13 | 1995-10-24 | Kuraray Co Ltd | Decomposition method of dimethylformamide |
| CN1212239A (en) * | 1997-09-22 | 1999-03-31 | 曾兆祥 | Leather-making waste water treatment method |
| CN1247166A (en) * | 1998-10-22 | 2000-03-15 | 贝德恩·迪林 | Biological treatment method and device for dye-containing wastewater in textile and leather industry |
-
2005
- 2005-12-15 CN CNB2005101231023A patent/CN100357201C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61125485A (en) * | 1984-11-19 | 1986-06-13 | Hitachi Zosen Eng Kk | Method for recovering dmf |
| JPH07275890A (en) * | 1994-04-13 | 1995-10-24 | Kuraray Co Ltd | Decomposition method of dimethylformamide |
| CN1212239A (en) * | 1997-09-22 | 1999-03-31 | 曾兆祥 | Leather-making waste water treatment method |
| CN1247166A (en) * | 1998-10-22 | 2000-03-15 | 贝德恩·迪林 | Biological treatment method and device for dye-containing wastewater in textile and leather industry |
Non-Patent Citations (1)
| Title |
|---|
| DMF对制革废水处理的影响及处理方法 王为等.中国皮革，第34卷第19期 2005 * |
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