CN103073163B - Treatment and sludge reduction device and method of de-sizing wastewater - Google Patents
Treatment and sludge reduction device and method of de-sizing wastewater Download PDFInfo
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Abstract
The invention provides a treatment and sludge reduction device and method of de-sizing wastewater and relates to wastewater treatment. The device is provided with a de-sizing wastewater concentrating system, a concentrated liquid treatment system, a biochemical treatment system and a sludge treatment system. The de-sizing wastewater concentrating system is provided with a fine filter, a de-sizing wastewater collecting tank, a wastewater conveying pump, a heat exchanger, a membrane filtering system, a filtering liquid collecting tank and a concentrated liquid collecting tank; the concentrated liquid treatment system is provided with a medicament storing pot, a reaction pot, a sedimentation pot, a filtering device and a sediment collection pot; the biochemical treatment system is provided with a wastewater adjusting tank, a flocculation reaction tank, a sedimentation tank, an air floating device, a biochemical tank and a secondary sedimentation tank; and the sludge treatment system is provided with a sludge pump, an electrolyzing machine, a gravity concentration tank, a secondary sludge pump, a liquid supernatant reflowing pump, a flocculation reaction tank, a tertiary sludge pump and a dehydration machine. The method comprises the following steps of slurry separation, concentrated liquid treatment, biochemical treatment and sludge treatment. According to the treatment and sludge reduction device and method disclosed by the invention, the efficient treatment of the de-sizing wastewater can be realized; the amount of sludge in a wastewater treatment process is reduced, the treatment difficulty of dyeing wastewater is reduced and environmental pollution is relieved.
Description
Technical field
The present invention relates to a kind of wastewater treatment, especially relate to a kind of processing and mud decrement devices and methods therefor of desized wastewater.
Background technology
Weaving and printing and dyeing are traditional industries of China, occupy critical role in national economy.Starching and destarch are the important procedures in weaving and dyeing process, produce broken end for preventing or reducing yarn, line in the time weaving, and increase work efficiency, and yarn, line are processed to increase its intensity with slurry, are called starching.Slurry divides two natural with synthetic classes.The former has starch, treated starch, seaweed gel etc.; The latter uses carboxymethyl cellulose (CMC), polyvinyl alcohol, polyacrylic ester etc.Both also can be made into mixed slurry mutually.But slurry can affect the wettability of fabric in dyeing and finishing process, and hinder chemical fiber is contacted.Therefore,, in the time carrying out dyeing and finishing, fabric is generally all first through destarch.Cotton fabric destarch has the effect of removing partial impurities in fiber concurrently; Synthetic fabrics sometimes can destarch simultaneously in refinery practice.Destarch is with chemical agent, the slurry of being with on fabric to be removed, and according to different acidization or the enzyme decomposition methods of adopting of slurry therewith, textile sizing material is hydrolyzed or enzyme decomposes and is the water solubles.The waste water that fabric produces in destarch process is called desized wastewater, although its wastewater flow rate only accounts for 10%～15% of dyeing waste water total amount, but seriously polluted, pollutant load accounts for the half of total amount, the mud therefore producing also accounts for the half for the treatment of of dyeing wastewater generation mud.In desized wastewater, contain the pollutents such as slurry, slurry resolvent, fiber, acid, alkali and enzyme that various grey cloths back off, be alkalescence, slightly yellow; CODCr and BOD
5quite high; Its biodegradable is different with the difference of slurry: starch size BOD
5/ CODcr=0.3～0.5, chemical sizwe (as PVA) BOD5/CODcr=0.1 left and right.Due to PVA(polyvinyl alcohol) slurry has good performance, and low price, at present, it is to contain PVA(polyvinyl alcohol that printing and dyeing enterprise uses maximum) chemical sizwe.Therefore most of desized wastewaters contain PVA(polyvinyl alcohol).The waste water BOD that contains PVA
5/ COD
cr=0.1 left and right, is not only difficult to biochemistry, produces a large amount of mud, meanwhile, because the existence of PVA brings a difficult problem also to the regeneration of waste water.Therefore, to the recovery of slurry in desized wastewater, not only can, by utilization of waste material, reduce environmental pollution, and can alleviate biochemical burden, be conducive to dyeing waste water biochemical treatment, reduce mud discharging, also help the recycling utilization of waste water.At present, many about reporting for work of the recovery method of slurry, mainly contain the several different methods such as foamet, coagulating sedimentation, absorption method, heavy metal chelating method, plasma decomposition method, ultra-filtration method, biology (bacterium) decomposition method, wherein with cohesion, gel, the comprehensive best results of absorption.On the molecular chain of the main component polyvinyl alcohol (PVA) of slurry, contain a large amount of wetting ability hydroxyls, have good water-soluble, by the synthetic gelifying agent with selective reaction activity, gelifying agent is reacted with the hydroxyl generation polymer chemistry of PVA, hydroxyl is implemented to sealing treatment, once PVA loses water-soluble, just can precipitate and separate.SS-PERCLER method adopts SS-PQ, and the medicaments such as SS-AQ implement to PVA the net effect that cohesion, gel, absorption are multiplied each other, and clearance reaches 98%.If PVA move back waste water content 8g/L time, CODcr be 12000mg/L after removing 98%, make CODcr be down to 240mg/L, with other processing wastewater enter routine biochemistry process qualified discharge.Guo Li, Huang Chengwu and Xu Jingcheng, Zheng Tao philosophy have been introduced the method that adopts the sedimentation from the desized wastewater that contains PVA of borax gel precipitation to reclaim PVA, it is to add borax and sodium sulfate in the desized wastewater that contains PVA, optimum amount is borax 1.4g/L and sodium sulfate 14g/L, in the time that the PVA of desized wastewater concentration reaches 12g/L, the rate of recovery reaches 90%.The rate of recovery of PVA is relevant with the PVA concentration containing in waste water, and in the time that the PVA concentration containing in waste water is less than 5g/L, the rate of recovery is very low.In most cases, the PVA concentration in desized wastewater is less than 5g/L, how between 0.5～2.5g/L, therefore, preferably desized wastewater is concentrated after, then carry out PVA recovery.In addition, owing to adding a large amount of boraxs and sodium sulfate, on the one hand consume a large amount of pharmaceutical chemicalss, on the other hand, a large amount of boraxs and sodium sulfate are dissolved in waste water, cause in waste water salinity high, cause burden to the biochemical system of wastewater treatment.Li Wen pin has been introduced and has been adopted spiral wound from desized wastewater, to reclaim the method for PVA, and the rate of recovery can reach more than 90%, contains 3%～5% PVA in concentrated solution, by supplementing after PVA, can make slurry use again, and still, film systemic contamination is very serious, and running cost is high.As can be seen here, although the treatment process of desized wastewater is existing many, existing desized wastewater is processed and the method for mud decrement all exists such or such deficiency.
Chinese patent CN102897936A discloses a kind for the treatment of process and device thereof of dye-printing desizing waste water, that the desized wastewater after pre-treatment is adjusted to pH value in advance, then utilize the starch mud in amylolysis material water solution desized wastewater, to reduce stickiness and the ionic concn of desized wastewater, finally again the desized wastewater after hydrolyzed starch mud is imposed to film separable programming, and then make desized wastewater reach the effect of solid-liquid separation, to obtain recycle-water, by this, follow-up while carrying out solid-liquid separation effectively to delay, the incrustation of filter membrane stops up the generation with filter cake, relative that the film life cycle life-span is extended.
Chinese patent CN102774987A discloses a kind of desized wastewater treatment unit, this device comprises temporary tank, neutralization reaction groove and settling bath, the front end of described temporary tank is provided with wastewater inlet pipe, in temporary tank, be provided with filtering net along water (flow) direction, the end of temporary tank is connected with one end of neutralization reaction groove by water pipe, the other end of described neutralization reaction groove is connected with settling bath by water pipe, and the rising pipe of described settling bath is provided with activated charcoal filter.In described temporary tank, be provided with 2-4 filtering net.Described neutralization reaction groove top is provided with alkali lye transfer lime.This beneficial effect of the invention: 1, every effluent index meets country and the local requirement about water quality standard; 2, system operation is simple and reliable, safe, easy to operate, reduces running cost and investment cost; 3, select short, the feasibility of processing technological flow, shock-resistant, treatment effect stable; 4, convenient operation and management, be convenient to safeguard.
Summary of the invention
The object of the invention is to the problem existing for existing desized wastewater treatment technology, sludge quantity when can realizing the efficient processing of desized wastewater and reducing wastewater treatment is provided, reduces processing and the mud decrement devices and methods therefor of the intractability of dyeing waste water and a kind of desized wastewater of alleviation dyeing waste water environmental pollution.
The processing of desized wastewater of the present invention and mud decrement device are provided with:
Desized wastewater concentration systems: comprise fine filter, desized wastewater collecting tank, waste water transferpump, heat exchanger, membrane filtration system, filtrate collection pond and concentrated solution collecting tank; The import of fine filter connects with desized wastewater groove, the outlet of fine filter connects with the import of desized wastewater collecting tank, the outlet of desized wastewater collecting tank connects the import of waste water transferpump, waste water carries pump outlet to connect heat exchanger inlets, the import of heat exchanger outlet connecting film filtering system, the filtrate outlet of membrane filtration system connects filtrate collection pond, and the concentrated solution outlet of membrane filtration system connects concentrated solution collecting tank;
Concentrated solution treatment system: comprise medicament basin, retort, setting tank, filtration unit and precipitation holding tank; Medicament basin is positioned at the top of retort and connects with the dosing mouth of retort, the charging opening of retort connects with the concentrated solution collecting tank outlet of desized wastewater concentration systems, the outlet of retort connects with the import of setting tank, the outlet of setting tank connects with the import of filtration unit, and the precipitation outlet of filtration unit connects with the import of precipitation holding tank; The filtrate outlet of filtration unit connects with the import in filtrate collection pond in desized wastewater concentration systems;
Biochemical treatment system: comprise wastewater equalization pond, flocculation tank, settling tank, air-floating apparatus, biochemistry pool and second pond, the filtrate collection pond outlet of desized wastewater concentration systems connects the import of the wastewater equalization pond of biochemical treatment system, the outlet of wastewater equalization pond connects the import of flocculation tank, the outlet of flocculation tank connects the import of settling tank, the wastewater outlet of settling tank connects the import of air-floating apparatus, the sludge outlet of settling tank connects the sludge pump import of sludge treating system, the filtrate outlet of air-floating apparatus connects the import of biochemistry pool, the scum silica frost outlet of air-floating apparatus connects the sludge pump import of sludge treating system, the wastewater outlet of biochemistry pool connects second pond import, the sludge outlet of biochemistry pool connects the sludge pump import of sludge treating system, the wastewater outlet of second pond connects discharge of wastewater mouth, the sludge outlet of second pond connects the sludge pump import of sludge treating system,
Sludge treating system: comprise sludge pump, electrolysis machine, gravity concentration tank, secondary sludge pump, supernatant liquor reflux pump, flocculation tank, three grades of sludge pumps and water extracter, the import of sludge pump connects settling tank in biochemical treatment system, air-floating apparatus, the sludge outlet of biochemistry pool and second pond, mud pump outlet connects the mud import of electrolysis machine, the sludge outlet of electrolysis machine connects the import of gravity concentration tank, the supernatant liquor outlet of gravity concentration tank connects the import of supernatant liquor reflux pump, supernatant liquor backflow pump outlet connects the import in biochemical treatment system mesophytization pond, the sludge outlet of gravity concentration tank connects the import of secondary sludge pump, secondary mud pump outlet connects with flocculation tank import, flocculation tank outlet connects three grades of mud pump outlet, three grades of mud pump outlet connect water extracter import, the filtrate outlet of water extracter connects the import of supernatant liquor reflux pump, the clod that water extracter produces is transported outward.
Membrane filtration system in described desized wastewater concentration systems can adopt ceramic membrane filter system or metal membrane filter system etc.; The ceramic membrane element aperture of ceramic membrane filter system can be 20～80nm; The metallic membrane element aperture of metal membrane filter system can be 30～80nm;
The operating pressure of the membrane filtration system in described desized wastewater concentration systems is 3～6bar, and temperature is 70～85 DEG C.
Retort in described concentrated solution treatment system is three mouthfuls of retort with transit mixer, and retort is separately installed with a salting-out agent basin, a sour basin and a gelifying agent basin.
The method of desized wastewater processing of the present invention and mud decrement, comprises the following steps:
1) pulp separation: desized wastewater is pumped into fine filter, be collected in after filtering in desized wastewater collecting tank, then be delivered to heat exchanger through waste water transferpump waste water is heated, then enter membrane filtration system concentrated, obtain filtrate and concentrated solution; Filtrate enters filtrate collection pond, and concentrated solution enters concentrated solution collecting tank;
2) concentrated solution processing: will be delivered to retort through the concentrated solution of step 1) pulp separation gained, add the gelifying agent, acid and the salting-out agent that are stored in medicament basin, after reaction, pump enters setting tank, then device carries out solid-liquid separation and obtains slurry sediment and filtered wastewater after filtration; Slurry sediment is stored in precipitation holding tank; The wastewater collection that filtering separation obtains enters biochemical treatment of wastewater in filtrate collection pond;
3) biochemical treatment: by step 1) and step 2) filtrate that is collected in filtrate collection pond of gained mixes in wastewater equalization pond with the mercerizing waste water in printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water, then separates to obtain qualified discharge waste water and sludge slurry through flocculation reaction, precipitate and separate with the laggard second pond of biochemical treatment;
4) sludge treatment:
(1) electrolysis: the sludge slurry of settling tank, biochemistry pool and second pond in step 3) biochemical treatment and the scum silica frost of air-floating apparatus are entered to electrolysis machine electrolysis through pipeline and sludge pump;
(2) gravity concentration: the mud after electrolysis is sent into and carried out gravity concentration in gravity concentration tank, the free radical that electrolysis is produced further reacts with mud, destroy the structure of mud, crack microbial cell wall, the cell juice in extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it more easily for Institute of Micro-biology utilizes, and then be back in the biochemistry pool of biochemical treatment system recycle by supernatant liquor reflux pump;
(3) flocculation sediment: the mud after gravity concentration is pumped into flocculation tank, add flocculation agent to carry out flocculation reaction by chemicals dosing plant in flocculation tank;
(4) dehydration: the mud after flocculation reaction is completely pumped into dewater to obtain in water extracter clod and filtrate, and filtrate is back in the biochemistry pool of step 3) biochemical treatment, completes desized wastewater and processes and mud decrement.
In step 1), the temperature of described heating can be 70～85 DEG C; Described concentrating is concentrated 5～20 times; The COD of described filtrate is 600～1600mg/L, and the COD of described concentrated solution is 30000～100000mg/L.
In step 2) in, the time of described reaction can be 15～22min.
In step 3), described flocculation reaction, precipitate and separate and biochemical treatment are in flocculation tank, to add the flocculation agent, coagulant aids and the gas floatation agent that have prepared, carrying out entering settling tank after flocculation reaction separates, settling tank bottom precipitation enters sludge treating system through pipeline, settling tank top waste water flows into air-floating apparatus and carries out dissolved air flotation, the scum silica frost that air-floating apparatus top separates enters sludge treating system through pipeline, and filtrate is pumped via pipes in biochemistry pool; The waste water of air-floating apparatus bottom pumps in biochemistry pool, through aerobic or anaerobism+aerobic or double oxygen+aerobic processing, then through second pond precipitate and separate, waste water after the outflow biochemical treatment of second pond top, the precipitation of second pond bottom enters sludge treating system through pipeline;
The mixture of optional a kind of in ferrous sulfate, ferric sulfate, Polyferric Sulfate, Tai-Ace S 150, aluminum chloride, poly-aluminium etc. of described flocculation agent or two kinds.
In step 4) (1) part, the top layer of the anode of described electrolysis machine is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, and the substrate of described anode can be titanium plate or plastic plate etc.; The operating voltage of the electrolyzer of described electrolysis can be 2～250V, and adjacent two interelectrode voltages can be 2～18V, and current density can be 3～400mA/cm
2.
In step 4) (2) part, the time of described gravity concentration can be 48～72h, makes the dead microorganism broken wall liquefaction in mud, organic substance decomposing.
In step 4) (3) part, described flocculation reaction is the flocculation tank that the mud of gravity concentration tank generation is pumped into sludge treatment step through pipeline and secondary sludge pump, in flocculation tank, add flocculation agent by chemicals dosing plant, after reacting completely, pump into water extracter by three grades of sludge pumps;
Described flocculation agent can be selected from least one in aluminium salt, molysite, poly-aluminium, Polyferric Sulfate, organic polymer coargulator, microbial flocculant etc.;
Described aluminium salt is optional from Tai-Ace S 150 or aluminum chloride etc.; The optional one in ferric sulfate, ferrous sulfate, iron(ic) chloride etc. of described molysite; One in the optional auto-polymerization aluminum chloride of described poly-aluminium, polyaluminium sulfate, polymer aluminium silicate etc.; One in the optional auto-polymerization iron(ic) chloride of Polyferric Sulfate, bodied ferric sulfate, polymeric silicicacid iron etc.; The preferred iron(ic) chloride of described flocculation agent etc.
In step 4) (4) part, described dehydration can adopt the one in filter-press dehydration, centrifuge dehydration, vacuum filtering and dewatering etc.
Compared with the prior art, tool of the present invention has the following advantages:
1, realized the recycle and reuse of PVA
Dyeing waste water mainly comprises destarch, boiling-off, bleaching, mercerising, dyeing, stamp and arrangement etc., and desized wastewater generally accounts for 10%～15% of total amount, and organic pollutant total amount accounts for half.Due to, the chemical sizwes that use containing polyvinyl alcohol (PVA) of textile industry at present, often contain many PVA, conventionally BOD more in desized wastewater
5/ COD
cr=0.1 left and right, belongs to and is difficult to biochemical organic waste water, in order to improve the intractability of dyeing waste water, has done large quantity research both at home and abroad.By desized wastewater membrane concentration, make PVA content in concentrated solution reach 30000～100000mg/L, with gel salting-out process, PVA in concentrated solution is precipitated again, not only can significantly alleviate the intractability of dyeing waste water, and can reclaim more than 90% PVA, realize the recycle and reuse of PVA in desized wastewater.
2, significantly alleviated the processing load for the treatment of of dyeing wastewater biochemical system
In desized wastewater, often contain many PVA, belong to and be difficult to biochemical organic waste water, after the PVA in desized wastewater is reclaimed, can make the total amount of organic of dyeing waste water reduce one times, BOD
5/ COD
crbring up to 0.5 from 0.1, significantly alleviate the processing load for the treatment of of dyeing wastewater biochemical system.
3, in treatment of dyeing wastewater process, the amount of mud reduces about half
When treatment of dyeing wastewater, can produce a large amount of mud, this mud is by dangerous solid waste water property management reason, and processing costs, up to 500～3000 yuan/ton, causes very large processing load to printing and dyeing enterprise.Due to, the organism in desized wastewater accounts for the half left and right of dyeing wastewater through organic matter total amount, reclaims by the PVA to wherein, and the mud that can make treatment of dyeing wastewater produce reduces about half.
4, solve dyeing waste water recycling utilization membrane pollution problem
Printing and dyeing enterprise is water rich and influential family, and Ye Shi heavy polluter, for water saving, reduces dyeing waste water discharge environmental pollution, and in recent years, many enterprises set about dyeing waste water after biochemical treatment, then through membrane sepn, recycling utilization.But film system, in the time of operation, can find that there is a large amount of spawns and stop up, and causes film systemic contamination serious, cleans frequently, severe patient causes film system crash.Tracing it to its cause, is exactly that the PVA containing in waste water causes, and by the PVA in desized wastewater is reclaimed, has not only realized the recycle of PVA, has also solved the membrane pollution problem of dyeing waste water recycling utilization from source.
Brief description of the drawings
Fig. 1 is the processing of desized wastewater of the present invention and the structure of mud decrement device embodiment composition schematic diagram.
Embodiment
The present invention be to existing desized wastewater treatment technology after further investigation, a kind of desized wastewater based on membrane concentration proposing for the physicochemical property of desized wastewater is processed and mud decrement apparatus and method.
Processing below in conjunction with accompanying drawing to desized wastewater of the present invention and mud decrement device are further described.
Referring to Fig. 1, the processing of desized wastewater of the present invention and mud decrement device are made up of desized wastewater concentration systems, concentrated solution treatment system, biochemical treatment system and sludge treating system.
Desized wastewater concentration systems is made up of fine filter 11, desized wastewater collecting tank 12, waste water transferpump 13, heat exchanger 14, membrane filtration system 15, filtrate collection pond 16 and concentrated solution collecting tank 17.Concentrated solution treatment system comprises medicament basin 21, retort 22, setting tank 23, filtration unit 24 and precipitation holding tank 25.Biochemical treatment system comprises wastewater equalization pond 31, flocculation tank 32, settling tank 33, air-floating apparatus 34, biochemistry pool 35 and second pond 36.Sludge treating system comprises sludge pump 41, electrolysis machine 42, gravity concentration tank 43, secondary sludge pump 44, supernatant liquor reflux pump 45, flocculation tank 46, three grades of sludge pumps 47 and water extracters 48.
The import of the fine filter 11 of desized wastewater concentration systems connects with desized wastewater receiving tank, the outlet of fine filter 11 connects with the import of desized wastewater collecting tank 12, the outlet of desized wastewater collecting tank 12 connects the import of waste water transferpump 13, the outlet of waste water transferpump 13 connects heat exchanger 14 imports, heat exchanger 14 exports the import of connecting film filtering system 15, the filtrate outlet of membrane filtration system 15 connects the import in filtrate collection pond 16, and the concentrated solution outlet of membrane filtration system 15 connects 17 imports of concentrated solution collecting tank.
The medicament basin 21 of concentrated solution treatment system is positioned at the top of retort 22, connect with the dosing mouth of retort 22, the charging opening of retort 22 connects with concentrated solution collecting tank 17 outlets of desized wastewater concentration systems, the outlet of retort 22 connects with the import of setting tank 23, the outlet of setting tank 23 connects with the import of filtration unit 24, the filtrate outlet of filtration unit 24 connects with the import in filtrate collection pond 16 in desized wastewater concentration systems, and the precipitation outlet of filtration unit 24 connects with the import of precipitation holding tank 25.
Filtrate collection pond 16 outlets of desized wastewater concentration systems connect the import of the wastewater equalization pond 31 of biochemical treatment system, the outlet of wastewater equalization pond 31 connects the import of flocculation tank 32, the outlet of flocculation tank 32 connects the import of settling tank 33, the wastewater outlet of settling tank 33 connects the import of air-floating apparatus 34, the sludge outlet of settling tank 33 connects sludge pump 41 imports of sludge treating system, the filtrate outlet of air-floating apparatus 34 connects the import of biochemistry pool 35, the scum silica frost outlet of air-floating apparatus 34 connects sludge pump 41 imports of sludge treating system, the wastewater outlet of biochemistry pool 35 connects second pond 36 imports, the sludge outlet of biochemistry pool 35 connects sludge pump 41 imports of sludge treating system, the wastewater outlet of second pond 36 connects discharge of wastewater mouth, the sludge outlet of second pond 36 connects sludge pump 41 imports of sludge treating system.
The import of the sludge pump 41 of sludge treating system connects settling tank 33 in biochemical treatment system, air-floating apparatus 34, the sludge outlet of biochemistry pool 35 and second pond 36, the outlet of sludge pump 41 connects the mud import of electrolysis machine 42, the sludge outlet of electrolysis machine 42 connects the import of gravity concentration tank 43, the supernatant liquor outlet of gravity concentration tank 43 connects the import of supernatant liquor reflux pump 45, the outlet of supernatant liquor reflux pump 45 connects the import in biochemical treatment system mesophytization pond 35, the sludge outlet of gravity concentration tank 43 connects the import of secondary sludge pump 44, the outlet of secondary sludge pump 44 connects with flocculation tank 46 imports, flocculation tank 46 outlets connect the outlet of three grades of sludge pumps 47, the outlet of three grades of sludge pumps 47 connects water extracter 48 imports, the filtrate outlet of water extracter 48 connects the import of supernatant liquor reflux pump 45, the clod that water extracter 48 produces is transported outward.
Membrane filtration system 15 in described desized wastewater concentration systems is the one of ceramic membrane filter system or metal membrane filter system; The ceramic membrane element aperture of ceramic membrane filter system is 20～80nm; The metallic membrane element aperture of metal membrane filter system is 30～80nm.
The operating pressure of the membrane filtration system 15 in described desized wastewater concentration systems is 3～6bar, and temperature is 70～85 DEG C.
Retort 22 in described concentrated solution treatment system is three mouthfuls of retort with transit mixer, and retort 22 is separately installed with a salting-out agent basin, a sour basin and a gelifying agent basin.
Processing and the mud decrement of a kind of desized wastewater of the present invention comprise the following steps:
Step (1) pulp separation: desized wastewater is pumped into fine filter 11, after fine filtering, be collected in desized wastewater collecting tank 12, be delivered to heat exchanger 14 through waste water transferpump 13 again waste water is heated to 70～85 DEG C, then enter membrane filtration system 15 and concentrate 5～20 times, obtaining filtrate and the COD that COD is 600～1600mg/L is 30000～100000mg/L concentrated solution; Filtrate enters filtrate collection pond 16, and concentrated solution enters concentrated solution collecting tank 17;
Step (2) concentrated solution processing: will be delivered to retort 22 through the concentrated solution of step (1) pulp separation gained, add the gelifying agent, acid and the salting-out agent that are stored in medicament basin 21, after reaction 15～22min, pump enters setting tank 23, then installs after filtration 24 and carry out solid-liquid separation and obtain slurry sediment and filtered wastewater; Slurry sediment is stored in precipitation holding tank 25; The wastewater collection that filtering separation obtains enters biochemical treatment of wastewater in filtrate collection pond 16.
Step (3) biochemical treatment: the filtrate that step (1) and step (2) gained are collected in filtrate collection pond 16 mixes in wastewater equalization pond with the mercerizing waste water in printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water, then separate to obtain qualified discharge waste water and sludge slurry through flocculation reaction, precipitate and separate, the laggard second pond of biochemical treatment;
Step (4) sludge treatment: 1) electrolysis: in step (3) biochemical treatment, settling tank 33, biochemistry pool 35 and the sludge slurry of second pond 36 and the scum silica frost of air-floating apparatus 34 enter electrolysis machine 42 electrolysis through pipeline and sludge pump 41; 2) gravity concentration: the mud after electrolysis enters gravity concentration tank 43, the free radical that electrolysis is produced further reacts with mud, destroy the structure of mud, crack microbial cell wall, the cell juice in extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it more easily for Institute of Micro-biology utilizes, and then be back in the biochemistry pool 35 of biochemical treatment system recycle by supernatant liquor reflux pump 45.3) flocculation sediment: the mud after gravity concentration is pumped into flocculation tank 46, add flocculation agent to carry out flocculation reaction by chemicals dosing plant in flocculation tank 46; 4) dehydration: the mud after flocculation reaction is completely pumped into dewater to obtain in water extracter 48 clod and filtrate, and filtrate is back in the biochemistry pool 35 of step (3) biochemical treatment.
Step (1) pulp separation gained concentrated solution mixes in wastewater equalization pond 31 through mercerizing waste water, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water in the separating obtained liquid of gel precipitation, step (1) pulp separation gained filtrate, printing and dyeing mill, then carries out biochemical treatment.
Described in step (3) biochemical treatment, flocculation reaction is in flocculation tank 32, to add the flocculation agent, coagulant aids and the gas floatation agent that have prepared, carrying out entering settling tank 33 after flocculation reaction separates, settling tank 33 bottom precipitations enter sludge treating system through pipeline, settling tank top waste water flows into air-floating apparatus 34 and carries out dissolved air flotation, the scum silica frost that air-floating apparatus 34 tops separate enters sludge treating system through pipeline, and filtrate is pumped via pipes in biochemistry pool 35.
Described in step (3) biochemical treatment, flocculation agent is the mixture of a kind of of ferrous sulfate, ferric sulfate, Polyferric Sulfate, Tai-Ace S 150, aluminum chloride, poly-aluminium or two kinds.
Described in step (3) biochemical treatment, the waste water of air-floating apparatus 34 bottoms is pumped in biochemistry pool 35, through aerobic or anaerobism+aerobic or double oxygen+aerobic processing, again through second pond 36 precipitate and separate, waste water after second pond 36 tops outflow biochemical treatments, the precipitation of second pond 36 bottoms enters sludge treating system through pipeline.
Described in step (4) sludge treatment, the top layer of electrolysis machine 42 anodes of electrolysis is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, and the substrate of described nano-catalytic noble electrode can be titanium plate or plastic plate.
Described in step (4) sludge treatment, the operating voltage of the electrolyzer of electrolysis can be 2～250V, and adjacent two interelectrode voltages can be 2～18V, and current density can be 3～400mA/cm
2.
Described in step (4) sludge treatment, gravity concentration is that the mud after electrolysis is deposited in to 48～72h in gravity concentration tank 43, makes the dead microorganism broken wall liquefaction in mud, organic substance decomposing.
Described in step (4) sludge treatment, flocculation is that the mud that gravity concentration tank 43 is produced enters the flocculation tank 46 of sludge treatment step through pipeline and secondary sludge pump 44 pumps, in flocculation tank 46, add flocculation agent by chemicals dosing plant, after reacting completely, pump into water extracter 48 by three grades of sludge pumps 47.
The flocculation agent flocculating described in step (4) sludge treatment is one or more combinations in aluminium salt (Tai-Ace S 150, aluminum chloride), molysite (ferric sulfate, ferrous sulfate, iron(ic) chloride), poly-aluminium (polymerize aluminum chloride, polyaluminium sulfate, polymer aluminium silicate), Polyferric Sulfate (poly-ferric chloride, bodied ferric sulfate, polymeric silicicacid iron), organic polymer coargulator or microbial flocculant; Optimum flocculent is iron(ic) chloride.
Described in step (4) sludge treatment, dehydration is the one of filter-press dehydration, centrifuge dehydration or vacuum filtering and dewatering
Provide the processing of desized wastewater and the specific embodiment of mud decrement below in conjunction with Fig. 1:
Embodiment 1
Certain COD is processing and the mud decrement embodiment of the desized wastewater of 13000mg/L:
(1) pulp separation: the desized wastewater that is 13000mg/L by COD pumps into fine filter 11, after fine filtering, be collected in desized wastewater collecting tank 12, be delivered to heat exchanger 14 through waste water transferpump 13 again waste water is heated to 70 DEG C, then enter membrane filtration system 15 and concentrate 5 times, obtaining filtrate and the COD that COD is 1530mg/L is 58891mg/L concentrated solution; Filtrate enters filtrate collection pond 16, and concentrated solution enters concentrated solution collecting tank 17;
(2) concentrated solution processing: will be delivered to retort 22 through the concentrated solution of step (1) pulp separation gained, add the gelifying agent, acid and the salting-out agent that are stored in medicament basin 21, after reaction 15～22min, pump enters setting tank 23, then installs after filtration 24 and carry out solid-liquid separation and obtain slurry sediment and filtered wastewater; Slurry is stored in precipitation holding tank 25; The wastewater collection that filtering separation obtains enters biochemical treatment of wastewater in filtrate collection pond 16.
(3) biochemical treatment: the filtrate that step (1), (2) gained are collected in filtrate collection pond 16 mixes in the wastewater equalization pond 31 of biochemical treatment system with the mercerizing waste water in printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water, then separate to such an extent that COD is less than 55mg/L waste water and sludge slurry through flocculation reaction, precipitate and separate, the laggard second pond of biochemical treatment;
(4) sludge treatment: 1) electrolysis: in step (3) biochemical treatment, settling tank 33, biochemistry pool 35 and the sludge slurry of second pond 36 and the scum silica frost of air-floating apparatus 34 enter electrolysis machine 42 electrolysis through pipeline and sludge pump 41; 2) gravity concentration: the mud after electrolysis enters gravity concentration tank 43, the free radical that electrolysis is produced further reacts with mud, destroy the structure of mud, crack microbial cell wall, the cell juice in extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it more easily for Institute of Micro-biology utilizes, and then be back in the biochemistry pool 35 of biochemical treatment system recycle by supernatant liquor reflux pump 45.3) flocculation sediment: the mud after gravity concentration is pumped into flocculation tank 46, add flocculation agent to carry out flocculation reaction by chemicals dosing plant in flocculation tank 46; 4) dehydration: the mud after flocculation reaction is completely pumped into dewater to obtain in water extracter 48 clod and filtrate, and filtrate is back in the biochemistry pool 46 of step (3) biochemical treatment.4) dehydration: the mud after flocculation reaction is completely pumped into the water ratio clod and the filtrate that are less than 60% of dewatering in water extracter 48 to obtain by three grades of sludge pumps 47.
Embodiment 2
Certain COD is processing and the mud decrement embodiment of the desized wastewater of 4500mg/L:
(1) pulp separation: the desized wastewater that is 4500mg/L by COD pumps into fine filter 11, after fine filtering, be collected in desized wastewater collecting tank 12, be delivered to heat exchanger 14 through waste water transferpump 13 again waste water is heated to 70 DEG C, then enter membrane filtration system 15 and concentrate 20 times, obtaining filtrate and the COD that COD is 910mg/L is 72710mg/L concentrated solution; Filtrate enters filtrate collection pond 16; Concentrated solution enters concentrated solution collecting tank 17;
(2) concentrated solution processing: will be delivered to retort 22 through the concentrated solution of the concentrated gained of step (1), add the gelifying agent, acid and the salting-out agent that are stored in medicament basin 21, after reaction 15～22min, pump enters settling tank 23, then installs after filtration 24 and carry out solid-liquid separation and obtain slurry sediment and filtered wastewater; Slurry is stored in precipitation holding tank 25; The wastewater collection that filtering separation obtains enters biochemical treatment of wastewater in filtrate collection pond 16.
(3) biochemical treatment: the filtrate that step (1), (2) gained are collected in filtrate collection pond 16 mixes in the wastewater equalization pond 31 of biochemical treatment system with the mercerizing waste water in printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water, then separate to such an extent that COD is less than 55mg/L waste water and sludge slurry through flocculation reaction, precipitate and separate, the laggard second pond of biochemical treatment;
(4) sludge treatment: 1) electrolysis: in step (3) biochemical treatment, settling tank 33, biochemistry pool 35 and the sludge slurry of second pond 36 and the scum silica frost of air-floating apparatus 34 enter electrolysis machine 42 electrolysis through pipeline and sludge pump 41; 2) gravity concentration: the mud after electrolysis enters gravity concentration tank 43, the free radical that electrolysis is produced further reacts with mud, destroy the structure of mud, crack microbial cell wall, the cell juice in extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it more easily for Institute of Micro-biology utilizes, and then be back in the biochemistry pool 35 of biochemical treatment system recycle by supernatant liquor reflux pump 45.3) flocculation sediment: the mud after gravity concentration is pumped into flocculation tank 46, add flocculation agent to carry out flocculation reaction by chemicals dosing plant in flocculation tank 46; 4) dehydration: the mud after flocculation reaction is completely pumped into dewater to obtain in water extracter 48 clod and filtrate, and filtrate is back in the biochemistry pool 46 of step (3) biochemical treatment.4) dehydration: the mud after flocculation reaction is completely pumped into the water ratio clod and the filtrate that are less than 60% of dewatering in water extracter 48 to obtain by three grades of sludge pumps 47.
Embodiment 3
Certain COD is processing and the mud decrement embodiment of the desized wastewater of 15261mg/L:
(1) pulp separation: the desized wastewater that is 17261mg/L by COD pumps into fine filter 11, after fine filtering, be collected in desized wastewater collecting tank 12, be delivered to heat exchanger 14 through waste water transferpump 13 again waste water is heated to 70 DEG C, then enter membrane filtration system 15 and concentrate 6 times, obtaining filtrate and the COD that COD is 1511mg/L is 95822mg/L concentrated solution; Filtrate enters filtrate collection pond 16, and concentrated solution enters concentrated solution collecting tank 17;
(2) concentrated solution processing: will be delivered to retort 22 through the concentrated solution of the concentrated gained of step (1), add the gelifying agent, acid and the salting-out agent that are stored in medicament basin 21, after reaction 15～22min, pump enters settling tank 23, then installs after filtration 24 and carry out solid-liquid separation and obtain slurry sediment and filtered wastewater; Slurry is stored in precipitation holding tank 25; The wastewater collection that filtering separation obtains enters biochemical treatment of wastewater in filtrate collection pond 16.
(3) biochemical treatment: the filtrate that step (1), (2) gained are collected in filtrate collection pond 16 mixes in the wastewater equalization pond 31 of biochemical treatment system with the mercerizing waste water in printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water, then separate to such an extent that COD is less than 55mg/L waste water and sludge slurry through flocculation reaction, precipitate and separate, the laggard second pond of biochemical treatment;
(4) sludge treatment: 1) electrolysis: in step (3) biochemical treatment, settling tank 33, biochemistry pool 35 and the sludge slurry of second pond 36 and the scum silica frost of air-floating apparatus 34 enter electrolysis machine 42 electrolysis through pipeline and sludge pump 41; 2) gravity concentration: the mud after electrolysis enters gravity concentration tank 43, the free radical that electrolysis is produced further reacts with mud, destroy the structure of mud, crack microbial cell wall, the cell juice in extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it more easily for Institute of Micro-biology utilizes, and then be back in the biochemistry pool 35 of biochemical treatment system recycle by supernatant liquor reflux pump 45.3) flocculation sediment: the mud after gravity concentration is pumped into flocculation tank 46, add flocculation agent to carry out flocculation reaction by chemicals dosing plant in flocculation tank 46; 4) dehydration: the mud after flocculation reaction is completely pumped into dewater to obtain in water extracter 48 clod and filtrate, and filtrate is back in the biochemistry pool 46 of step (3) biochemical treatment.4) dehydration: the mud after flocculation reaction is completely pumped into the water ratio clod and the filtrate that are less than 60% of dewatering in water extracter 48 to obtain by three grades of sludge pumps 47.
Embodiment 4
Certain COD is processing and the mud decrement embodiment of the desized wastewater of 4300mg/L:
(1) pulp separation: the desized wastewater that is 4590mg/L by COD pumps into fine filter 11, after fine filtering, be collected in desized wastewater collecting tank 12, be delivered to heat exchanger 14 through waste water transferpump 13 again waste water is heated to 70 DEG C, then enter membrane filtration system 15 and concentrate 8 times, obtaining filtrate and the COD that COD is 955mg/L is 30032mg/L concentrated solution; Filtrate enters filtrate collection pond 16; Concentrated solution enters concentrated solution collecting tank 17;
(2) concentrated solution processing: will be delivered to retort 22 through the concentrated solution of the concentrated gained of step (1), add the gelifying agent, acid and the salting-out agent that are stored in medicament basin 21, after reaction 15～22min, pump enters settling tank 23, then installs after filtration 24 and carry out solid-liquid separation and obtain slurry sediment and filtered wastewater; Slurry is stored in precipitation holding tank 25; The wastewater collection that filtering separation obtains enters biochemical treatment of wastewater in filtrate collection pond 16.
(3) biochemical treatment: the filtrate that step (1), (2) gained are collected in filtrate collection pond 16 mixes in the wastewater equalization pond 31 of biochemical treatment system with the mercerizing waste water in printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water, then separate to such an extent that COD is less than 55mg/L waste water and sludge slurry through flocculation reaction, precipitate and separate, the laggard second pond of biochemical treatment;
(4) sludge treatment: 1) electrolysis: in step (3) biochemical treatment, settling tank 33, biochemistry pool 35 and the sludge slurry of second pond 36 and the scum silica frost of air-floating apparatus 34 enter electrolysis machine 42 electrolysis through pipeline and sludge pump 41; 2) gravity concentration: the mud after electrolysis enters gravity concentration tank 43, the free radical that electrolysis is produced further reacts with mud, destroy the structure of mud, crack microbial cell wall, the cell juice in extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it more easily for Institute of Micro-biology utilizes, and then be back in the biochemistry pool 35 of biochemical treatment system recycle by supernatant liquor reflux pump 45.3) flocculation sediment: the mud after gravity concentration is pumped into flocculation tank 46, add flocculation agent to carry out flocculation reaction by chemicals dosing plant in flocculation tank 46; 4) dehydration: the mud after flocculation reaction is completely pumped into dewater to obtain in water extracter 48 clod and filtrate, and filtrate is back in the biochemistry pool 46 of step (3) biochemical treatment.4) dehydration: the mud after flocculation reaction is completely pumped into the water ratio clod and the filtrate that are less than 60% of dewatering in water extracter 48 to obtain by three grades of sludge pumps 47.
Claims (10)
1. the processing of desized wastewater and a mud decrement device, is characterized in that being provided with desized wastewater concentration systems, concentrated solution treatment system, biochemical treatment system and sludge treating system:
Described desized wastewater concentration systems comprises fine filter, desized wastewater collecting tank, waste water transferpump, heat exchanger, membrane filtration system, filtrate collection pond and concentrated solution collecting tank; The import of fine filter connects with desized wastewater groove, the outlet of fine filter connects with the import of desized wastewater collecting tank, the outlet of desized wastewater collecting tank connects the import of waste water transferpump, waste water carries pump outlet to connect heat exchanger inlets, the import of heat exchanger outlet connecting film filtering system, the filtrate outlet of membrane filtration system connects filtrate collection pond, and the concentrated solution outlet of membrane filtration system connects concentrated solution collecting tank;
Described concentrated solution treatment system comprises medicament basin, retort, setting tank, filtration unit and precipitation holding tank; Medicament basin is positioned at the top of retort and connects with the dosing mouth of retort, the charging opening of retort connects with the concentrated solution collecting tank outlet of desized wastewater concentration systems, the outlet of retort connects with the import of setting tank, the outlet of setting tank connects with the import of filtration unit, and the precipitation outlet of filtration unit connects with the import of precipitation holding tank; The filtrate outlet of filtration unit connects with the import in filtrate collection pond in desized wastewater concentration systems;
Described biochemical treatment system comprises wastewater equalization pond, flocculation tank, settling tank, air-floating apparatus, biochemistry pool and second pond, the filtrate collection pond outlet of desized wastewater concentration systems connects the import of the wastewater equalization pond of biochemical treatment system, the outlet of wastewater equalization pond connects the import of flocculation tank, the outlet of flocculation tank connects the import of settling tank, the wastewater outlet of settling tank connects the import of air-floating apparatus, the sludge outlet of settling tank connects the sludge pump import of sludge treating system, the filtrate outlet of air-floating apparatus connects the import of biochemistry pool, the scum silica frost outlet of air-floating apparatus connects the sludge pump import of sludge treating system, the wastewater outlet of biochemistry pool connects second pond import, the sludge outlet of biochemistry pool connects the sludge pump import of sludge treating system, the wastewater outlet of second pond connects discharge of wastewater mouth, the sludge outlet of second pond connects the sludge pump import of sludge treating system,
Described sludge treating system comprises sludge pump, electrolysis machine, gravity concentration tank, secondary sludge pump, supernatant liquor reflux pump, flocculation tank, three grades of sludge pumps and water extracter, the import of sludge pump connects settling tank in biochemical treatment system, air-floating apparatus, the sludge outlet of biochemistry pool and second pond, mud pump outlet connects the mud import of electrolysis machine, the sludge outlet of electrolysis machine connects the import of gravity concentration tank, the supernatant liquor outlet of gravity concentration tank connects the import of supernatant liquor reflux pump, supernatant liquor backflow pump outlet connects the import in biochemical treatment system mesophytization pond, the sludge outlet of gravity concentration tank connects the import of secondary sludge pump, secondary mud pump outlet connects with flocculation tank import, flocculation tank outlet connects three grades of mud pump outlet, three grades of mud pump outlet connect water extracter import, the filtrate outlet of water extracter connects the import of supernatant liquor reflux pump, the clod that water extracter produces is transported outward,
Membrane filtration system in described desized wastewater concentration systems adopts ceramic membrane filter system or metal membrane filter system; The ceramic membrane element aperture of ceramic membrane filter system is 20～80nm; The metallic membrane element aperture of metal membrane filter system is 30～80nm; The operating pressure of the membrane filtration system in described desized wastewater concentration systems is 3～6bar, and temperature is 70～85 DEG C.
2. a kind of processing of desized wastewater and mud decrement device as claimed in claim 1, it is characterized in that the retort in described concentrated solution treatment system is three mouthfuls of retort with transit mixer, retort is separately installed with a salting-out agent basin, a sour basin and a gelifying agent basin.
3. a method for desized wastewater processing and mud decrement, is characterized in that, adopts a kind of processing and mud decrement device of desized wastewater as claimed in claim 1, said method comprising the steps of:
1) pulp separation: desized wastewater is pumped into fine filter, be collected in after filtering in desized wastewater collecting tank, then be delivered to heat exchanger through waste water transferpump waste water is heated, then enter membrane filtration system concentrated, obtain filtrate and concentrated solution; Filtrate enters filtrate collection pond, and concentrated solution enters concentrated solution collecting tank;
2) concentrated solution processing: will be delivered to retort through the concentrated solution of step 1) pulp separation gained, add the gelifying agent, acid and the salting-out agent that are stored in medicament basin, after reaction, pump enters setting tank, then device carries out solid-liquid separation and obtains slurry sediment and filtered wastewater after filtration; Slurry sediment is stored in precipitation holding tank; The wastewater collection that filtering separation obtains enters biochemical treatment of wastewater in filtrate collection pond;
3) biochemical treatment: by step 1) and step 2) filtrate that is collected in filtrate collection pond of gained mixes in wastewater equalization pond with the mercerizing waste water in printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water, then separates to obtain qualified discharge waste water and sludge slurry through flocculation reaction, precipitate and separate with the laggard second pond of biochemical treatment;
4) sludge treatment:
(1) electrolysis: the sludge slurry of settling tank, biochemistry pool and second pond in step 3) biochemical treatment and the scum silica frost of air-floating apparatus are entered to electrolysis machine electrolysis through pipeline and sludge pump;
(2) gravity concentration: the mud after electrolysis is sent into and carried out gravity concentration in gravity concentration tank, the free radical that electrolysis is produced further reacts with mud, destroy the structure of mud, crack microbial cell wall, the cell juice in extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it more easily for Institute of Micro-biology utilizes, and then be back in the biochemistry pool of biochemical treatment system recycle by supernatant liquor reflux pump;
(3) flocculation sediment: the mud after gravity concentration is pumped into flocculation tank, add flocculation agent to carry out flocculation reaction by chemicals dosing plant in flocculation tank;
(4) dehydration: the mud after flocculation reaction is completely pumped into dewater to obtain in water extracter clod and filtrate, and filtrate is back in the biochemistry pool of step 3) biochemical treatment, completes desized wastewater and processes and mud decrement.
4. a kind of desized wastewater is processed and the method for mud decrement as claimed in claim 3, it is characterized in that in step 1), and the temperature of described heating is 70～85 DEG C; Described concentrating is concentrated 5～20 times; In step 2) in, the time of described reaction is 15～22min.
5. a kind of desized wastewater is processed and the method for mud decrement as claimed in claim 3, it is characterized in that in step 3), described flocculation reaction, precipitate and separate and biochemical treatment are in flocculation tank, to add the flocculation agent, coagulant aids and the gas floatation agent that have prepared, carrying out entering settling tank after flocculation reaction separates, settling tank bottom precipitation enters sludge treating system through pipeline, settling tank top waste water flows into air-floating apparatus and carries out dissolved air flotation, the scum silica frost that air-floating apparatus top separates enters sludge treating system through pipeline, and filtrate is pumped via pipes in biochemistry pool; The waste water of air-floating apparatus bottom pumps in biochemistry pool, through aerobic or anaerobism+aerobic or double oxygen+aerobic processing, then through second pond precipitate and separate, waste water after the outflow biochemical treatment of second pond top, the precipitation of second pond bottom enters sludge treating system through pipeline;
Described flocculation agent is selected from the mixture of a kind of in ferrous sulfate, ferric sulfate, Polyferric Sulfate, Tai-Ace S 150, aluminum chloride, poly-aluminium or two kinds.
6. a kind of desized wastewater is processed and the method for mud decrement as claimed in claim 3, it is characterized in that in step 4) (1) part, the top layer of the anode of described electrolysis machine is coated with the metal oxide inertia catalyst coatings that crystal grain is 10～35nm, and the substrate of described anode is titanium plate or plastic plate; The operating voltage of the electrolyzer of described electrolysis is 2～250V, and adjacent two interelectrode voltages are 2～18V, and current density is 3～400mA/cm
2.
7. a kind of desized wastewater is processed and the method for mud decrement as claimed in claim 3, it is characterized in that, in step 4) (2) part, the time of described gravity concentration is 48～72h.
8. a kind of desized wastewater is processed and the method for mud decrement as claimed in claim 3, it is characterized in that in step 4) (3) part, described flocculation reaction is the flocculation tank that the mud of gravity concentration tank generation is pumped into sludge treatment step through pipeline and secondary sludge pump, in flocculation tank, add flocculation agent by chemicals dosing plant, after reacting completely, pump into water extracter by three grades of sludge pumps;
Described flocculation agent is selected from least one in aluminium salt, molysite, poly-aluminium, Polyferric Sulfate, organic polymer coargulator, microbial flocculant;
Described aluminium salt is selected from Tai-Ace S 150 or aluminum chloride; Described molysite is selected from the one in ferric sulfate, ferrous sulfate, iron(ic) chloride; Described poly-aluminium is selected from the one in polymerize aluminum chloride, polyaluminium sulfate, polymer aluminium silicate; Polyferric Sulfate is selected from the one in poly-ferric chloride, bodied ferric sulfate, polymeric silicicacid iron.
9. a kind of desized wastewater is processed and the method for mud decrement as claimed in claim 8, it is characterized in that described flocculation agent is iron(ic) chloride.
10. a kind of desized wastewater is processed and the method for mud decrement as claimed in claim 3, it is characterized in that in step 4) (4) part, and described dehydration is the one in employing filter-press dehydration, centrifuge dehydration, vacuum filtering and dewatering.
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| CN103288316A (en) * | 2013-07-02 | 2013-09-11 | 湖南中天诚环保科技有限公司 | In-plant decrement treatment method for urban sludge |
| CN103922449B (en) * | 2014-04-04 | 2015-08-26 | 张爱均 | A kind of high-efficiency environment friendly flocculation agent administered for black smelly river |
| CN104973730A (en) * | 2015-06-19 | 2015-10-14 | 湖州石淙印染有限公司 | Dyeing wastewater treatment method |
| CN105169757A (en) * | 2015-09-23 | 2015-12-23 | 邓永辉 | Waste dehydrating system |
| CN107512820B (en) * | 2016-06-16 | 2020-11-03 | 吴江市新达印染厂 | Method for removing antimony in printing and dyeing wastewater |
| CN107512843B (en) * | 2017-07-17 | 2020-10-30 | 中山大学 | Sludge dewatering system based on circulating salt solution dialysis and dewatering method thereof |
| CN108358361A (en) * | 2018-03-22 | 2018-08-03 | 天津市众源环保工程有限公司 | A kind of organic sewage environment-friendly treatment method and device |
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