CN104230121A - Treatment method for printing and dyeing wastewater - Google Patents
Treatment method for printing and dyeing wastewater Download PDFInfo
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- CN104230121A CN104230121A CN201410511641.3A CN201410511641A CN104230121A CN 104230121 A CN104230121 A CN 104230121A CN 201410511641 A CN201410511641 A CN 201410511641A CN 104230121 A CN104230121 A CN 104230121A
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Abstract
The invention relates to a treatment method for printing and dyeing wastewater, and belongs to the field of methods for wastewater treatment. The treatment method for printing and dyeing wastewater comprises the following steps: removing impurities from the printing and dyeing wastewater through grids, feeding the wastewater to a regulating reservoir, utilizing a pump to lift the wastewater up to enter a hydrolysis acidification pool, conducting hydrolytic acidification, discharging the acidified water to an aerobiotic pool, conducting aeration and oxidation, discharging the wastewater from the aerobiotic pool to a sand filter, after precipitation and filtration, feeding the wastewater to a chemical oxidation pool, oxidizing the wastewater and draining when the water reaches the standard. The treatment method disclosed by the invention combines multiple treatment manners to comprehensively treat the wastewater; a total removal rate of COD (Chemical Oxygen Demand) in the wastewater by the treatment method is up to 84.4%, and the chromaticity removal rate is up to 97.2%; through practical application, by the treatment method, the precipitated sludge is fully returned to the anaerobic pool, so no residual sludge is discharged; the system is stable in running, convenient to manage, and capable of achieving a good treatment effect to obtain environment benefits and social benefits.
Description
Technical field
The present invention relates to a kind for the treatment of process of dyeing waste water, belong to method of wastewater treatment field.
Background technology
Dyeing waste water refers to cotton, hair, the natural fibers such as chemical fibre and chemical fibre textile product are in drift refining, dyeing, the waste water produced in stamp and arrangement process, dyeing is industrial wastewater discharge rich and influential family, it is large that dyeing waste water has the water yield, organic pollutant content is high, colourity is dark, alkalescence is large, the features such as change of water quality, belong to unmanageable trade effluent, the dyestuff of printing and dyeing industry owing to using, auxiliary agent is different, in the dyeing waste water of each factory discharge, pollutent character and quantity also differ widely, therefore also varied to the groundwater pollution control of dyeing waste water, first should from the thinking polluting whole-process control, adopt advanced process for cleanly preparing, make production process waste minimization, for the dyeing waste water that cannot reclaim removing, then should select suitable treatment process according to the water quality of waste water and water yield feature, make waste water qualified discharge after treatment.
The water quality of dyeing waste water is different with the kinds of fibers of employing and the difference of complete processing, contaminant component is widely different, general dyeing waste water pH value is 6-10, COD is 400-1000mg/L, BOD5 is 100-4000mg/L, SS is 100-200mg/L, colourity be 100-400 doubly, when after the kinds of fibers and complete processing change of dyeing and printing process and employing, waste water quality will have change greatly.
At present, domestic treatment of dyeing wastewater means are based on biochemical process, what have also connects chemical method with it, external is also substantially like this, due to the development of chemical & blended fabric in recent years and the progress of finishing process in printing and dye-ing technology, the bio-refractory solution organism such as PVA slurry, New-type adjuvant are made to enter dyeing waste water in a large number, process adds difficulty, some biological treatment systems drop to about 0% by original 70%COD clearance, even lower, the removal of colourity is a great problem for the treatment of of dyeing wastewater, and old biochemical process always can not be satisfactory in decolouring.In addition, the ratio that the COD that the chemical sizwes such as PVA cause accounts for the total COD of dyeing waste water is quite large, because of to be difficult to utilize by common micro-organisms and make its clearance only at 20%-30%, for the problems referred to above, recent domestic all has carried out some research work, wherein representative have: the plant selection and application of anaerobic-aerobic biological treatment technique, efficient decolorizing bacteria and PVA degradation bacteria, the development of efficient de-bag coagulating agent, photocatalytic degradation decolouring etc.
20 century 70s, domestic to dyeing waste water based on biological treatment, account for more than 80%, especially account for the overwhelming majority with Aerobic biological process method, from existing situation, accelerate aeration and contact oxidation method with surface in China's Dyeing and Printing Wastewater Biological Treatment method and occupy the majority.In addition, blast aeration activated sludge process, jet-flow aeration activated sludge process, blodiscs etc. also have application, biological fluidized bed is still in the tentative application stage, but because biology is not high to chroma removal rate, general about 50%, so when colority of water requires higher, physical or chemical treatment need be aided with, Aerobic biological process is obvious to BOD removal effect, generally can reach about 80%, but colourity and COD clearance not high especially as chemical sizwes such as PVA, tensio-active agent, the widespread use of solvent and a cloth Alkali reduction technology, simple Aerobic biological process difficulty is increasing, water outlet is difficult to up to standard.In addition, the high working cost of aerobic method and excess sludge process or handling problems are always the difficult problems that field of waste water treatment is not resolved.Therefore, the Anaerobic Microbiological Treatment Technology of dyeing waste water starts to be subject to people's attention, and seeks efficient, low consumption, the treatment of dyeing wastewater new technology of reduced investment shown important day.
Summary of the invention
The present invention aims to provide the treatment process being applicable to dyeing waste water that a kind of technique is simple, easy to operate, working cost is low, treatment effect is good.
The treatment process of dyeing waste water of the present invention, comprises the following steps:
Dyeing waste water is by certainly flowing into equalizing tank after grid removing impurity, and then promote with pump and enter hydrolysis acidification pool, after acidication, water outlet flows into Aerobic Pond, carry out gas explosion oxidation, waste water enters sand filter from Aerobic Pond, after sedimentation and filtration, enter chemical oxidation pond, and after entering oxidation, standard water discharge is discharged.
Preferably, the equalizing tank residence time of the present invention is 6h, and the hydrolysis acidification pool residence time is 8h, and the Aerobic Pond residence time is 7h, and the settling tank residence time is 1.5h, and the chemical oxidation pond residence time is 1h.
Preferred, the dissolved oxygen in Aerobic Pond of the present invention controls at 2-3mg/L.
Preferred further, settling tank of the present invention adopts vertical sedimentation basin, and water enters in pond from the pipe core of precipitation, and clear water after precipitation flows into sand filter by the prionodont overflow weir of pond periphery, and the surface load of settling tank is 1.3m
3/ m
2h.
Further preferred, the oxygenant in chemical oxidation pond of the present invention is dioxide peroxide.
Treatment process of the present invention, considers and reduces adding of chemical agent as far as possible, and reduces mud handling capacity to avoid producing " secondary pollution ", determines to adopt the waste water treatment process based on biochemical process.
Waste water mean residence time in equalizing tank is 6h, and the pH value of normal water inlet is 8-9, therefore can not establish pH value varitrol, and waste water is after spraying cooling, and the water temperature entered in wastewater equalization pond remains on 30-35 DEG C throughout the year; The residence time of waste water in hydrolysis acidification pool is 8h, combined stuffing through selecting is installed in hydrolysis acidification pool, be beneficial to the biofilm of anerobe, utilize the effect of the acidication stage acid-producing bacteria in anaerobic process that the macromolecular organic compounds such as mill base various in waste water, slurry, washing composition are transformed into the small molecular organic compounds that can be biodegradable, improve the ratio of BOD5/CODcr, thus improve the biodegradability of waste water, for the process of subsequent bio catalytic oxidation and qualified discharge create favourable condition, this element plays an important role in whole technique; The residence time of waste water in Aerobic Pond is 7h, in Aerobic Pond, install biofilm packing, make aerobic treatment system impact load have stronger adaptability, mud is few in one-tenth amount, in pond, microbial film is after domestication, adaptive faculty is comparatively strong, and CODcr, BOD5 clearance is high, in Aerobic, dissolved oxygen in Aerobic Pond is the key of Systematical control, in Aerobic Pond, changed the aeration rate of gas blower by frequency transformer, the dissolved oxygen in Aerobic Pond is controlled at 2-3mg/L; Settling tank adopts vertical sedimentation basin, water enters in pond from the pipe core of precipitation, clear water after precipitation flows into sand filter by the prionodont overflow weir of pond periphery, the residence time of waste water in settling tank is 1.5h, the surface load of settling tank is 1.3m3/m2h, the biochemical sludge precipitated in settling tank can be back to mud collecting tank with sludge pipe, mud in mud collecting tank, enter wastewater equalization pond by flow by gravity, or pump in anaerobic pond to reduce the biological sludge amount of process with sludge pump; After sand filter filters, enter chemical oxidation pond, carry out oxidative decoloration with dioxide peroxide to waste water, and play disinfection, the residence time of waste water in chemical oxidation pond is 1h, and process water is discharged after oxidative decoloration.
Raw wastewater is after biochemical treatment, although be stripped of the most of colourity in waste water, but colour is still deep, must through processing ability qualified discharge further, chemical flocculation can be adopted to remove colourity in waste water, but chemical flocculation certainly leads to a large amount of chemical sludge, separately to build the process disposal facility of mud, and have the risk of generation " secondary pollution ", therefore adopt conventional chemical oxidation decoloration process chlorine to be cheap conventional chemical oxidation discoloring agent, adopt chlorine bleaching in the method, consider that the organism with chlorine decolours in likely chlorine and water generates poisonous organic chloride, and the transport of chlorine, storage and the danger used, so changing chlorine decolouring into more environmental protection and the decolouring of safe dioxide peroxide in the future.
Treatment process of the present invention, adopt the comprehensive treating process be made up of several treatment process, the total decreasing ratio of the COD of described treatment process to waste water reaches 84.4%, and colourity decreasing ratio is 97.2%, shows through practical application, precipitating sludge is all back to anaerobic pond, discharged without residual mud, system run all right, convenient management, and good treatment effect can be obtained, reach the unification of environmental benefit and social benefit.
Embodiment
Embodiment one:
Dyeing waste water is by certainly flowing into equalizing tank after grid removing impurity, waste water mean residence time in equalizing tank is 6h, and the pH value of normal water inlet is 8-9, therefore can not establish pH value varitrol, waste water is after spraying cooling, and the water temperature entered in wastewater equalization pond remains on 30-35 DEG C throughout the year; The residence time of waste water in hydrolysis acidification pool is 8h, combined stuffing through selecting is installed in hydrolysis acidification pool, be beneficial to the biofilm of anerobe, utilize the effect of the acidication stage acid-producing bacteria in anaerobic process that the macromolecular organic compounds such as mill base various in waste water, slurry, washing composition are transformed into the small molecular organic compounds that can be biodegradable, improve the ratio of BOD5/CODcr, thus improve the biodegradability of waste water, for the process of subsequent bio catalytic oxidation and qualified discharge create favourable condition, this element plays an important role in whole technique; The residence time of waste water in Aerobic Pond is 7h, in Aerobic Pond, install biofilm packing, make aerobic treatment system impact load have stronger adaptability, mud is few in one-tenth amount, in pond, microbial film is after domestication, adaptive faculty is comparatively strong, and CODcr, BOD5 clearance is high, in Aerobic, dissolved oxygen in Aerobic Pond is the key of Systematical control, in Aerobic Pond, changed the aeration rate of gas blower by frequency transformer, the dissolved oxygen in Aerobic Pond is controlled at 2-3mg/L; Settling tank adopts vertical sedimentation basin, water enters in pond from the pipe core of precipitation, clear water after precipitation flows into sand filter by the prionodont overflow weir of pond periphery, the residence time of waste water in settling tank is 1.5h, the surface load of settling tank is 1.3m3/m2h, the biochemical sludge precipitated in settling tank can be back to mud collecting tank with sludge pipe, mud in mud collecting tank, enter wastewater equalization pond by flow by gravity, or pump in anaerobic pond to reduce the biological sludge amount of process with sludge pump; After sand filter filters, enter chemical oxidation pond, carry out oxidative decoloration with dioxide peroxide to waste water, and play disinfection, the residence time of waste water in chemical oxidation pond is 1h, and process water is discharged after oxidative decoloration.
Embodiment two: treatment effect
Use the treatment process of dyeing waste water of the present invention, process the dyeing waste water that certain printing and dyeing mill produces, result as shown in Table-1.
。
Claims (5)
1. the treatment process of dyeing waste water, comprises the following steps:
Dyeing waste water is by certainly flowing into equalizing tank after grid removing impurity, and then promote with pump and enter hydrolysis acidification pool, after acidication, water outlet flows into Aerobic Pond, carry out gas explosion oxidation, waste water enters sand filter from Aerobic Pond, after sedimentation and filtration, enter chemical oxidation pond, and after entering oxidation, standard water discharge is discharged.
2. the treatment process of dyeing waste water as claimed in claim 1, it is characterized in that the described equalizing tank residence time is 6h, the hydrolysis acidification pool residence time is 8h, and the Aerobic Pond residence time is 7h, the settling tank residence time is 1.5h, and the chemical oxidation pond residence time is 1h.
3. the treatment process of dyeing waste water as claimed in claim 1, is characterized in that the dissolved oxygen in described Aerobic Pond controls at 2-3mg/L.
4. the treatment process of dyeing waste water as claimed in claim 1, it is characterized in that described settling tank adopts vertical sedimentation basin, water enters in pond from the pipe core of precipitation, and clear water after precipitation flows into sand filter by the prionodont overflow weir of pond periphery, and the surface load of settling tank is 1.3m
3/ m
2h.
5. the treatment process of dyeing waste water as claimed in claim 1, is characterized in that the oxygenant in described chemical oxidation pond is dioxide peroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410511641.3A CN104230121A (en) | 2014-09-29 | 2014-09-29 | Treatment method for printing and dyeing wastewater |
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| CN201410511641.3A CN104230121A (en) | 2014-09-29 | 2014-09-29 | Treatment method for printing and dyeing wastewater |
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| CN104230121A true CN104230121A (en) | 2014-12-24 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174665A (en) * | 2015-10-30 | 2015-12-23 | 朱忠良 | Treatment method for dyeing and printing effluent |
| CN105836968A (en) * | 2016-05-12 | 2016-08-10 | 安徽国能亿盛环保科技有限公司 | Printing and dyeing wastewater treatment process |
| CN107857444A (en) * | 2017-12-14 | 2018-03-30 | 缪宜霖 | A kind of environment protection method for handling dyeing waste water |
| CN108862852A (en) * | 2018-07-04 | 2018-11-23 | 东华大学 | A kind of method that magnetic bio charcoal strengthens dyeing waste water biological denitrificaion |
| CN109133543A (en) * | 2018-11-02 | 2019-01-04 | 石狮市展耀纺织科技有限公司 | A kind of printing and dyeing pre-treatment waste water treatment system and its treatment process |
| CN109371722A (en) * | 2018-10-25 | 2019-02-22 | 绍兴柯桥展望印染有限公司 | All-cotton knitting cloth printing technology |
| CN114956474A (en) * | 2022-06-17 | 2022-08-30 | 广东轻工职业技术学院 | Biochemical combination method for treating PVA-containing printing and dyeing wastewater |
-
2014
- 2014-09-29 CN CN201410511641.3A patent/CN104230121A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174665A (en) * | 2015-10-30 | 2015-12-23 | 朱忠良 | Treatment method for dyeing and printing effluent |
| CN105836968A (en) * | 2016-05-12 | 2016-08-10 | 安徽国能亿盛环保科技有限公司 | Printing and dyeing wastewater treatment process |
| CN107857444A (en) * | 2017-12-14 | 2018-03-30 | 缪宜霖 | A kind of environment protection method for handling dyeing waste water |
| CN108862852A (en) * | 2018-07-04 | 2018-11-23 | 东华大学 | A kind of method that magnetic bio charcoal strengthens dyeing waste water biological denitrificaion |
| CN109371722A (en) * | 2018-10-25 | 2019-02-22 | 绍兴柯桥展望印染有限公司 | All-cotton knitting cloth printing technology |
| CN109133543A (en) * | 2018-11-02 | 2019-01-04 | 石狮市展耀纺织科技有限公司 | A kind of printing and dyeing pre-treatment waste water treatment system and its treatment process |
| CN114956474A (en) * | 2022-06-17 | 2022-08-30 | 广东轻工职业技术学院 | Biochemical combination method for treating PVA-containing printing and dyeing wastewater |
| CN114956474B (en) * | 2022-06-17 | 2023-11-28 | 广东轻工职业技术学院 | Biochemical combination method for treating PVA-containing printing and dyeing wastewater |
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