CN101700943B - Printing and dyeing waste water advanced treatment and recovery method - Google Patents

Printing and dyeing waste water advanced treatment and recovery method Download PDF

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Publication number
CN101700943B
CN101700943B CN 200910154247 CN200910154247A CN101700943B CN 101700943 B CN101700943 B CN 101700943B CN 200910154247 CN200910154247 CN 200910154247 CN 200910154247 A CN200910154247 A CN 200910154247A CN 101700943 B CN101700943 B CN 101700943B
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China
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water
treatment
waste water
printing
dyeing
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CN101700943A (en
Inventor
杨波
李方
田晴
张国华
钟启俊
魏爽
徐飞
叶萌
孙健
王凤蕊
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Pinghu Xinyuan Cci Capital Ltd
Donghua University
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ZHEJIANG XINCHENG DYEING CO Ltd
Donghua University
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Abstract

The invention discloses a printing and dyeing waste water advanced treatment recovery method which comprises a waste water advanced treatment system formed by a biological treatment system and a follow-up materialization precision treatment system; wherein the biological treatment system comprises a grating collector well (1), an adjusting tank (2), an anaerobic hydrolysis acidification tank (3), an aerobic biological contact oxidation tank (4), a biochemistry settling tank (5) and a biological aerated filter (6); wherein the materialization precision treatment system comprises a compound water purification system (7), an active carbon adsorption system (8), an ion exchange resin (9) and a precise filtering system (10); the grating collector well (1), the adjusting tank (2), the anaerobic hydrolysis acidification tank (3), the aerobic biological contact oxidation tank (4), the biochemistry settling tank (5) and the biological aerated filter (6), the water purification system (7), the active carbon adsorption system (8), the ion exchange resin (9) and the precise filtering system (10) form a set of complete yarn dyeing waste water advanced treatment technological process. The method is suitable for spinning printing and dyeing enterprises limited by output of supplying water or discharge of water and realizes the energy conservation and emission reduction of the spinning printing and dyeing enterprises and the reduced operational cost.

Description

A kind of printing and dyeing waste water advanced treatment recovery method
Technical field
The present invention relates to the deep treatment method of dyeing waste water, comprise biological treatment system and materialization treatment system two portions, the dyeing waste water advanced treatment process flow process of this two parts complete is to realize the technique reuse after the waste water advanced processing.The present invention is applicable to be subject to service discharge restriction (water-deficient area particularly, comprise the water quality type water-deficient area) or the textile printing and dyeing enterprises of water displacement restriction (overall control of pollutant discharge of enterprise), realize the energy-saving and emission-reduction of textile printing and dyeing enterprises and the running cost of reduction.
Background technology
Textile dyeing and finishing industry is the integral part of Chinese national economy, and the number of directly being engaged in raw material production, processing is 1.2 hundred million people approximately.There are certain gap in China's textile printing and dyeing industry technology, facilities and administration level and developed country, and the energy consumption of unit product, water consumption is larger, such as about 250 tons of the water consumptions of 1 ton of fabric of China's dyeing and finishing, are about 100 tons and German cotton is spinning.Textile industry year approximately 2,300,000,000 tons of water displacement, belong to the 5th of industrial water drainage, wherein mainly be dyeing and finishing wastewater, particularly reclamation rate is less than 10%, for minimum in all industries of national economy, so the independent research energy-saving and emission-reduction, resource recovery, waste water advanced processing and reuse are very urgent tasks.
China clearly proposes at environmental protection index, and by 2010, the quantity of wastewater effluent of unit output value reduced by 22% than 2005, among energy-saving and emission-reduction work has become in the weight of textile industry development.Energy-saving and emission-reduction are that dyeing is the important lever that dyeing carries out industry restructuring, optimizes allocation of resources.Consider from the angle of enterprise self, because the dual restrictive function of environmental capacity and water of productive use (directly translate into to enterprise supply water, the increasing substantially of draining quantitative limitation and water supply, effluent charge), advanced treatment and the reuse of factory effluent also become the unique channel that enterprise continues development.
Because a lot of classes of kind of textile dyeing and finishing, only with regard to fabric fibre, the natural fibers such as cotton, fiber crops, silk, hair had both been comprised, also comprise the man-made fiber such as the regenerated fibers such as viscose fiber, copper ammonia fibre and terylene, polyamide fibre, polyvinyl, the technique of their dyeing and finishings, used dyestuff difference are very large, therefore the classification of textile dyeing and finishing waste water is a lot, and the composition of Pollutants in Wastewater also varies.For different textile dyeing and finishing waste water, different with parameter to the technique of its processing.
Reuse of wastewater is processed three processes that generally comprise: the first step is that the qualified discharge that utilizes common materialization, biochemical process to satisfy waste water is processed; Second step is that the tail water that satisfies the mark emission request is carried out advanced treatment, water quality general satisfaction miscellaneous water water quality standard after processing; The 3rd step was that further purifying treatment is carried out in the second step water outlet, removed more up hill and dale the pollutent in the waste water, made final outflow water water quality satisfy the reuse requirement.In these three processes, key is advanced treatment and the 3rd step purifying treatment of second step, and the first step is the basis.Research and utilization diatomite advanced treatment process is arranged, utilize diatomite flocculation, adsorb and be filtered into the function of one, realization is to the advanced treatment of dyeing waste water, but diatomite can not be removed salt, can't solve salt accumulation problem, and the use procedure meeting produces a certain amount of materialized mud.Also has the technical process of research and utilization " ultra-filtration membrane+reverse osmosis membrane ", utilize the membrane technique realization to the advanced treatment of dyeing waste water, but membrane process investment and working cost are too high, and contain a large amount of colloids in the dyeing and finishing wastewater biological treatment tail water, very easily cause film to pollute, can greatly reduce the work-ing life of film.
The water quality situation of printing and dyeing technology water is the important factor that affects processing quality, and the unmanageable most of factor of printing and dyeing final product quality also is because process water water quality is unstable caused.For the current demand of printing and dyeing enterprise energy-saving and emission-reduction and Sustainable development, seek low-cost, stable dyeing waste water advanced treatment process, seem particularly important at present.
Summary of the invention
The objective of the invention is according to dyeing waste water and the printing and dyeing technology water characteristics to the water quality particular requirement, with existing biological treatment system and materialization treatment system reasonable combination, form low-cost, the stable printing and dyeing waste water advanced treatment recovery method (technical process) of a cover.
What the present invention will solve is the advanced treatment and reuse of dyeing waste water problem, to seek out a kind of low cost, stable and easy to operate printing and dyeing waste water advanced treatment recovery method.
For realizing purpose of the present invention, technical scheme of the present invention is: it comprises by being the advanced waste treatment system that the accurate treatment system of biological treatment system and follow-up materialization consists of; Biological treatment system comprise the grid pump well 1., equalizing tank 2., anaerobic hydrolysis acidification tank 3., the aerobic bio-contact oxidation pond 4., biochemical sedimentation basin 5. with BAF 6.; The accurate treatment system of materialization comprise compound water cleaning systems 7., the charcoal absorption system 8., ion exchange resin 9. with ultra-filtration system 10.; The grid pump well 1., equalizing tank 2., anaerobic hydrolysis acidification tank 3., the aerobic bio-contact oxidation pond 4., biochemical sedimentation basin 5., BAF 6., water cleaning systems 7., the charcoal absorption system 8., 10. 9. ion exchange resin consist of the complete yarn dyeing wastewater deep treatment process flow process of a cover with ultra-filtration system.
3. above-mentioned anaerobic hydrolysis acidification tank is provided with compounded mix through surface modification-filling fibers silk in 4. with aerobic biological contact oxidation pond, in order to improve the adhesion property of microorganism on the compounded mix silk, increase the microorganism concn of biological treatment system, the compactedness of filler is not less than 2/3rds of each pond effective volume; 3. submersible agitator is set at anaerobic hydrolysis acidification tank in, and the mass transfer effect of the intermittent operation control anaerobic hydrolysis-acidification by agitator and the reoxygenation of water body, the effect of mass transmitting during anaerobic hydrolysis acidification tank is 3. guaranteed; Submersible agitator is intermittent operation, and startup and the intermittent time of submersible agitator is set according to state of arts; Anaerobic hydrolysis acidification tank 3. with aerobic biological contact oxidation pond 4. in, the microorganic adhesion that dyestuff, auxiliary agent are had good Degradation on compounded mix, guaranteed anaerobic hydrolysis acidification tank 3. with aerobic biological contact oxidation pond biological treatment effect 4..
For the lower characteristics of Pollutant levels in the light polluted waste liquid, to anaerobic hydrolysis acidification tank 3. with aerobic biological contact oxidation pond 4. in the filling fibers of compounded mix process, increase the roughness on filling fibers surface, to be conducive to microorganism adhering on filling fibers.
Mode enterprising, that go out down that 5. BAF adopts, filtrate is gac; About activated carbon particle size Dmax=2mm, about Dmin=1mm, K80<2.0; 5. BAF is provided with special compounded mix unit before the filtrate district, compounded mix district and filtrate district spatially are parallel organization, be the aerobic bio-contact oxidation pond 4. water outlet through biochemical sedimentation basin precipitation 5. after, after supernatant liquor passes through first BAF compounded mix zone 6., the hydraulic detention time of waste water in the compounded mix district is 1~2h, enters the filtrate district again and carries out a biological disposal upon and filteration.The biological filter has increased the compounded mix unit, and organic matter removal efficient has been improved 5~10%
7. the compound water cleaning systems (compound reactor) of the accurate treatment system of materialization comprises dosing system, tube settling and sand filter three parts of water purification agent, the water purification agent that wherein adds be novel, to dyeing and printing process close friend's water purification agent---sodium bentonite; Avoid having dysgenic salts substances to enter to dyeing and printing process in the purification of water quality process.Wilkinite is take montmorillonite as main component, because there is some positively charged ion in the laminate structure that the montmorillonite structure cell forms, and the effect of these positively charged ions and montmorillonite structure cell is very insecure, easily by other cationic exchange, therefore have preferably ion exchangeable; Select wilkinite as the preliminary exchange that realizes calcium, magnesium ion in the water body of water purification agent, for follow-up ion exchange resin system reduces the heavy burdens; Sand filter arranges the automatic backwash system according to filtration resistance.
8. the charcoal absorption system utilizes the gac of different gradation to form the activated carbon column of series winding, has improved pollutent in the water body and ion adsorption capacity.Each activated carbon column is divided into upper and lower two portions, and essence is the activated carbon column of upper and lower two series windings in same tank body.
Ion exchange system is the strong-acid type cation exchange system 9..
Accurate filter is the facility of checking on of advanced treatment system as a whole, avoids tiny activated carbon granule and resin particle etc. to enter dyeing, affects quality product.10. accurate filter uses the porcelain filter of 5um, avoids Stainless Steel Filter may produce in the water after a small amount of iron ion enters processing.
Before yarn dyeing waste water is processed, at first yarn dyeing waste water is classified, wherein contain a large amount of dyestuffs, auxiliary agent and other organic pollutant and salt in the heavily contaminated waste water of 1 cylinder, 2 cylinders, directly enter the waste water treatment plant and carry out discharging after the processing up to standard; The light polluted waste liquid that dyes rinsing of removing contamination that 3 cylinders are later enters advanced waste treatment system, 1. this waste water be introduced into the grid pump well, after removing the part fiber SS in the waste water, 2. the equalizing tank that penetration depth is processed engineering ground carries out water quality, the water yield is regulated, the later process link that enters again advanced waste treatment system as the water source of the waste water advanced processing of yarn dyeing.
Anaerobic hydrolysis acidification tank of the present invention water outlet 3. enter biological contact oxidation pond 4. after, under aerobic condition, realize most of organic degradeds in the waste water.Because the light poaching wastewater COD that pollutes CrConcentration only is 150~300mg/L, if adopt common activated sludge process, then be difficult to assurance system microorganism concn, therefore filling fibers surface compounded mix after treatment be set as microorganism carrier in the aeration tank in 5., with the content of microorganism in the assurance system.
5. biological contact oxidation pond 4. water outlet enters biochemical sedimentation basin, and through 5. solid-liquid separation of biochemical sedimentation basin, the mud part of precipitation is back to equalizing tank and anaerobic hydrolysis acidification tank, only enters on a small quantity sludge sump, concentrates, processed again.
Enter the biological filter through the supernatant liquor of biochemical sedimentation basin after 5. solid, liquid separates and 6. make advanced treatment.Biological filter 6. pond uses compounded mix and gac as microorganism carrier, holds back under the dual function in microorganism biological degraded and media filtration, and realization is further degraded to water soluble contaminants matter in the water body and held back most of SS.
Biological filter 6. water outlet enters clean water basin, enters follow-up accurate materialization treatment system again, comprises compound water cleaning systems (compound reactor), charcoal absorption, ion exchange system and accurate filter.
Compound reactor comprises dosing district, tube settling district and sand filtration district.In the dosing district, utilize the water inlet surplus water head as hybrid power, (bentonitic interlayer cation kind determines bentonitic type, and interlayer cation is Na as water purification agent to add sodium bentonite +The time claim sodium bentonite), by bentonitic adsorption, remove organism remaining in most of water body, turbidity and colourity material, simultaneously a small amount of calcium, magnesium ion in the water body are replaced.After the tube settling district precipitation through compound reactor, supernatant liquor enters Sand Filtration System.Sand Filtration System comprises water distributor, quartz sand filter media and back-purge system.Be that SS and the colloidal material avoid the compound reactor water outlet to take out of pollute gac, so the compound reactor water outlet passes through first Sand Filtration System, hold back most suspended solidss and colloidal pollutent in the water body.The Sand Filtration System water outlet enters the activated carbon filtration system.
In the activated carbon filtration system, after the activated carbon column of part is at first passed through in water inlet, enter again the activated carbon column of lower part; The particle diameter of gac is 1mm~2mm in the activated carbon column of top, and the particle diameter of gac is 0.6mm~1.2mm in the activated carbon column of bottom.The series winding operation of different gradation activated carbon column can utilize to a greater extent the loading capacity of gac, and can reduce the back flushing number of times.Gac has huge specific surface area (500~1700m 2/ g), can realize the removal to residual organic substances in the water body, and adsorbable a small amount of calcium, magnesium, iron, manganese plasma.The gac water outlet enters ion exchange system.
Printing and dyeing technology water to hardness require high, 9. ion exchange system realizes calcium, magnesium etc. in the water body are affected cationic effective removal of printing quality by Zeo-karb, remove simultaneously a small amount of Fe and Mn that exists (mainly being produced by equipment corrosion), the Zeo-karb water outlet directly enters in the water reservoir.The supporting regeneration system rapidly of ion exchange system, regeneration waste liquid are sneaked into 1 cylinder, 2 cylinder dyeing waste waters enter the waste water treatment plant and process.
The 5um accurate filter is set in the water reservoir, avoids tiny active carbon powder, resin particle etc. to enter water body; Filter material is pottery, and a small amount of iron ion that may cause when avoiding selecting stainless material enters in the water body, affects the dyeing and printing products quality.
Beneficial effect of the present invention:
1, the present invention reconfigures existing ripe biological process of wastewater treatment and materialization treatment process, by to increasing compounded mix district, the selection of purifying agent, the measures such as series winding of adsorption tower different gradation gac before the modification of the optimization of biological treatment parameter, composite biological packing silk, the BAF, the characteristics that have that running cost is low, operating performance are stable, easy to operate can realize automatic operation simultaneously.
2, the present invention can effectively solve the waste water advanced processing problem of printing and dyeing mill, organism in the reuse water quality, colourity, turbidity, hardness, iron ion, mn ion etc. all satisfy the dyeing and printing process requirement, can solve the contradiction between printing and dyeing enterprise development and the pollutant emission, realize the target for energy-saving and emission-reduction of enterprise, reduce the running cost of enterprise, significantly improve the class of dyeing and printing products.
Description of drawings
Fig. 1 process flow sheet of the present invention.
Among the figure 1. be the grid pump well, 2. for equalizing tank, 3. anaerobic hydrolysis acidification tank, 4. the aerobic bio-contact oxidation pond, 5. biochemical sedimentation basin, 6. aeration and biological filter, 7. for compound water cleaning systems, 8. be charcoal absorption system, 9. ion exchange resin, 10. ultra-filtration system.
Embodiment
Below in conjunction with drawings and the specific embodiments, further set forth the present invention.Should be understood that these embodiment only are used for explanation the present invention, and be not used in restriction use range of the present invention.
Embodiment 1
A kind of printing and dyeing waste water advanced treatment recovery method, comprise the accurate treatment system of biological treatment system and follow-up materialization, wherein 1. biological treatment system comprises the grid pump well, equalizing tank 2., anaerobic hydrolysis acidification tank 3., the aerobic bio-contact oxidation pond 4., biochemical sedimentation basin 5. with BAF 6., 7. the accurate treatment system of materialization comprises compound water cleaning systems, the charcoal absorption system 8., ion exchange resin 9. with ultra-filtration system 10., by 1.~10. consisting of the complete yarn dyeing wastewater deep treatment process flow process of a cover, 1.~10. be provided with between and be interconnected, 10. 1. the flow direction of waste water for arriving, be that waste water enters the grid pump well and 1. pumps into afterwards equalizing tank 2., flow through anaerobic hydrolysis acidification tank successively more 3., the aerobic bio-contact oxidation pond 4., biochemical sedimentation basin 5. with BAF 6., compound water cleaning systems 7., the charcoal absorption system 8., ion exchange resin 9. with ultra-filtration system 10., flow out at last the reuse clear water.
Before yarn dyeing waste water is processed, at first yarn dyeing waste water is classified, wherein contain a large amount of dyestuffs, auxiliary agent and other organic pollutant and salt in the heavily contaminated waste water of 1 cylinder, 2 cylinders, directly enter the waste water treatment plant and carry out discharging after the processing up to standard; The light polluted waste liquid that dyes rinsing of removing contamination that 3 cylinders are later enters advanced waste treatment system, 1. this waste water be introduced into the grid pump well, after removing the part fiber SS in the waste water, 2. the equalizing tank of sending into (pumping into) advanced treatment engineering ground carries out water quality, the water yield is regulated, the anaerobic hydrolysis acidification tank, biological contact oxidation pond and the BAF that enter (inflow) biological treatment system as the water source of the waste water advanced processing of yarn dyeing.Removal to organism and colourity is the main task of anaerobic hydrolysis acidification tank, biological contact oxidation pond and BAF biological treatment system.
Biological treatment system of the present invention goes decolouring can be divided into two stages to waste water.Fs be dye molecule to sludge flocculation, sedimentation, migration, enrichment stage, the dye molecule in this stage waste water with the contact process of microorganism in be adsorbed on the thalline, and be trapped in the mud of reactor; Subordinate phase is the biological degradation stage, and this stage utilizes the enzyme of microorganism secretion that dye molecule is carried out catalyzed oxidation, reduction, destroys unsaturated conjugated system wherein, reach the purpose of decolouring, and intermediate product finally is decomposed into CO under microbial process 2, H 2The small-molecule substance such as O or be converted into the required nutritive substance of bacterium and synthetic new protoplasma.
Aerobic process is common biological treatment, but because the BOD/COD ratio of dyeing waste water generally lower (<0.25), biodegradability is bad, causes single aerobic process to chroma in waste water, COD clearance not high (50%~60%).
Anaerobic-aerobic treatment process of the present invention can remedy the deficiency of aerobic process to a certain extent.And some to be difficult to resolve the biodegradability of compound (such as aromatics, and phenyl ring is the main framework of dye molecule) under aerobic condition bad, and under anaerobic can effectively be decomposed.Such as the biological degradation of azoic dyestuff, its first step reaction is the reductive cleavage of the two keys of azo, and the katalaze enzyme of this reaction is azo reductase, and most azo reductases are loss of activity under aerobic conditions, and activity can be recovered after the deoxygenation.
Anaerobic hydrolysis acidification tank of the present invention: the mass transfer effect and the too much reoxygenation of avoiding water body of controlling anaerobic hydrolysis-acidification by the intermittent operation of agitator; By the filling fibers surface being set through the compounded mix of modification, improve the adhesion property of microorganism on filling fibers, increase the microorganism concn of biological treatment system.The hydraulic detention time of hydrolysis acidification pool is not less than 20h.
Aerobic bio-contact oxidation of the present invention pond: the filling fibers surface is set through the compounded mix of modification in the aerobic bio-contact oxidation pond, improves the adhesion property of microorganism on filling fibers, increase the microorganism concn of biological treatment system.The hydraulic detention time of aerobic hydrolysis acidification pool is not less than 11.5h.
Biological filter of the present invention: increased the compounded mix unit, organic matter removal efficient has been improved 5~10%.Waste water is not less than 1.5~2h at compounded mix unit hydraulic detention time, and the filtering velocity of biological filter is not more than 5m/h.
Compound reactor of the present invention: add sodium bentonite as water purification agent, by bentonitic adsorption, remove organism remaining in most of water body, turbidity and colourity material, simultaneously a small amount of calcium, magnesium ion in the water body are replaced, the Sand Filtration System of compound reactor can be realized the effectively catching to the SS that takes out of in the water outlet and the pollution of colloidal material.
Charcoal absorption of the present invention system: each unit is divided into upper and lower two portions, and essence is the activated carbon column of upper and lower two series windings in same tank body, and the mode of upper entering and lower leaving is adopted in water inlet.The particle diameter of gac is 1mm~2mm in the activated carbon column of top, and the particle diameter of gac is 0.6mm~1.2mm in the activated carbon column of bottom.The charcoal absorption system realizes the removal to residual organic substances in the water body, and adsorbable a small amount of calcium, magnesium, iron, manganese plasma.
Ion exchange system of the present invention: Zeo-karb is realized the effective removal to calcium, magnesium ion and Fe and Mn in the water body.
5um of the present invention pottery accurate filter: avoid tiny active carbon powder, resin particle etc. to enter water body.
Now take certain yarn dyeing company limited as example illustrates treatment effect of the present invention.
This yarn dyeing company limited produces waste water 2000m every day 3/ d, behind the yarn dyeing waste water process heavily contaminated effluent segregation, light polluted waste liquid is 1500m 3/ d, water-quality guideline sees Table 1.
The light dyeing waste-water water-quality guideline of polluting of table 1
Project Chemical oxygen demand (COD) (COD Cr) Biochemical oxygen demand (BOD) (BOD 5) Suspended substance (SS) Colourity (doubly) pH
Index (mg/L) 150~300 25~45 ≤70 ≤100 6.5~8.5
After waste water is processed through the present invention, from biological filter effluent quality such as table 2:
The waste water advanced processing of table 2 biological filter effluent quality index
The water quality project Unit Index
COD Cr mg/L 20~30
BOD 5 mg/L ≤5
SS mg/L ≤20
Colourity Extension rate ≤2
Transparency cm >30
The pH value 6.5~8.5
Total hardness With CaCO 3Meter ≤80
Through after the compound water cleaning systems of biological filter of the present invention water outlet process, charcoal absorption, ion exchange system and the secondary filter, final quality of reused water sees Table 3 again:
Table 3 quality of reused water index
The water quality project Unit Index
COD Cr mg/L <5
BOD 5 mg/L <2
Colourity Platinum cobalt degree ≤5
Total hardness With CaCO 3Meter ≤18
The pH value 6.5~8.5
Above-mentioned waste water is after the present invention processes, and obtaining the reuse every day water yield is 1000~1200m 3, total reclamation rate is 50~60%, 1.94 yuan/m of reuse cost 3, wherein: 0.74 yuan/m of biological treatment system processing cost 3(comprise system's depreciation, the electricity charge, labour cost, the electricity charge are 0.47 yuan/m to waste water 3Waste water); The accurate materialization treatment system processing costs such as compound water cleaning systems, charcoal absorption, ion exchange system are 1.20 yuan/m 3Waste water (comprising equipment amortization, gac and ion exchange resin replacement charge, the electricity charge and labour cost).

Claims (7)

1. a printing and dyeing waste water advanced treatment recovery method is characterized in that the method comprises the advanced waste treatment system that is made of biological treatment system and the accurate treatment system of follow-up materialization; Biological treatment system comprises grid pump well, equalizing tank, anaerobic hydrolysis acidification tank, aerobic bio-contact oxidation pond, biochemical sedimentation basin and BAF; The accurate treatment system of materialization comprises compound water cleaning systems, charcoal absorption system, ion exchange resin and ultra-filtration system, and grid pump well, equalizing tank, anaerobic hydrolysis acidification tank, aerobic bio-contact oxidation pond, biochemical sedimentation basin, BAF, compound water cleaning systems, charcoal absorption system, ion exchange resin and ultra-filtration system consist of the complete yarn dyeing wastewater deep treatment process flow process of a cover;
Before yarn dyeing waste water is processed, at first yarn dyeing waste water is classified, wherein contain a large amount of dyestuffs, auxiliary agent and other organic pollutant and salt in the heavily contaminated waste water of 1 cylinder, 2 cylinders, directly enter the waste water treatment plant and carry out discharging after the processing up to standard; The light polluted waste liquid that dyes rinsing of removing contamination that 3 cylinders are later then enters advanced waste treatment system, this waste water is introduced into grid pump well and equalizing tank, it is carried out after water quality and quantity regulates the later process link that enters again advanced waste treatment system as the water source of the waste water advanced processing of yarn dyeing;
The compound water cleaning systems of the accurate treatment system of materialization comprises dosing system, tube settling and sand filter three parts of water purification agent, the water purification agent that wherein adds be novel, to dyeing and printing process close friend's water purification agent---sodium bentonite; Wilkinite is take montmorillonite as main component, because there is some positively charged ion in the laminate structure that the montmorillonite structure cell forms, and the effect of these positively charged ions and montmorillonite structure cell is very insecure, easily by other cationic exchange, therefore have preferably ion exchangeable; Select wilkinite as the preliminary exchange that realizes calcium, magnesium ion in the water body of water purification agent, for follow-up ion exchange resin system reduces the heavy burdens; Sand filter arranges the automatic backwash system according to filtration resistance.
2. printing and dyeing waste water advanced treatment recovery method according to claim 1 is characterized in that in anaerobic hydrolysis acidification tank and the aerobic biological contact oxidation pond compounded mix-filling fibers being set all, and the compactedness of filler is not less than 2/3rds of each pond effective volume; Submersible agitator is set in anaerobic hydrolysis acidification tank, guarantees the effect of mass transmitting in the anaerobic hydrolysis acidification tank, submersible agitator is intermittent operation, and startup and the intermittent time of submersible agitator is set according to state of arts; In anaerobic hydrolysis acidification tank and the aerobic biological contact oxidation pond, the microorganic adhesion that dyestuff, auxiliary agent are had good Degradation guarantees the biological treatment effect of anaerobic hydrolysis acidification tank and aerobic biological contact oxidation pond on compounded mix.
3. printing and dyeing waste water advanced treatment recovery method according to claim 1, it is characterized in that for the lower characteristics of Pollutant levels in the light polluted waste liquid, filling fibers in anaerobic hydrolysis acidification tank and the aerobic biological contact oxidation pond is processed, increase the roughness on filling fibers surface, to be conducive to microorganism adhering on filling fibers.
4. printing and dyeing waste water advanced treatment recovery method according to claim 1 is characterized in that BAF adopts mode enterprising, that go out down, and filtrate is gac; Activated carbon particle size Dmax is 2mm, and Dmin is 1mm, K80<2.0; BAF is provided with special compounded mix unit before the filtrate district, compounded mix district and filtrate district spatially are parallel organization, be after the water outlet of aerobic bio-contact oxidation pond precipitates through biochemical sedimentation basin, after supernatant liquor passes through first the compounded mix zone of BAF, the hydraulic detention time of waste water in the compounded mix district is 1~2h, enters the filtrate district again and carries out a biological disposal upon and filteration.
5. printing and dyeing waste water advanced treatment recovery method according to claim 1, each unit of charcoal absorption system that it is characterized in that the accurate treatment system of materialization is divided into upper and lower two portions, essence is the activated carbon column of upper and lower two series windings in same tank body, the mode of upper entering and lower leaving is adopted in water inlet, after the activated carbon column of part is at first passed through in water inlet, enter again the activated carbon column of lower part; The particle diameter of gac is 1mm~2mm in the activated carbon column of top, and the particle diameter of gac is 0.6mm~1.2mm in the activated carbon column of bottom.
6. printing and dyeing waste water advanced treatment recovery method according to claim 1 is characterized in that the ion exchange resin of the accurate treatment system of materialization is Zeo-karb, mainly removes the positively charged ion that calcium in the water body, magnesium, iron, manganese affect printing quality.
7. printing and dyeing waste water advanced treatment recovery method according to claim 1, the ultra-filtration system that it is characterized in that the accurate treatment system of materialization uses the porcelain filter of 5 μ m, avoids Stainless Steel Filter may produce in the water after a small amount of iron ion enters processing.
CN 200910154247 2009-11-19 2009-11-19 Printing and dyeing waste water advanced treatment and recovery method Expired - Fee Related CN101700943B (en)

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