CN103073163A - 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 the dyeing process, produce broken end for preventing or reducing yarn, line when 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 the obstruction chemical contacts fiber.Therefore, when carrying out dyeing and finishing, fabric is generally all first through destarch.The cotton fabric destarch has the effect of removing partial impurities in the fiber concurrently; Synthetic fabrics sometimes can simultaneously destarch in refinery practice.Destarch is with chemical agent the slurry of being with on the fabric to be removed, and according to different acidization or the enzyme decomposition methods of adopting of slurry therewith, the textile sizing material is hydrolyzed or enzyme decomposes and is the water solubles.The waste water that fabric produces in the 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 half of total amount, and the mud that therefore produces also accounts for half that treatment of dyeing wastewater produces mud.Contain the pollutents such as slurry, slurry resolvent, fiber, acid, alkali and enzyme that various grey cloths are backed off in the desized wastewater, 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 is about chemical sizwe (such as PVA) BOD5/CODcr=0.1.Because the PVA(polyvinyl alcohol) slurry has good performance, and low price, at present, it is to contain the PVA(polyvinyl alcohol that printing and dyeing enterprise uses maximum) chemical sizwe.Therefore most of desized wastewaters contain the PVA(polyvinyl alcohol).The waste water BOD that contains PVA
5/ COD
CrAbout=0.1, not only be difficult to biochemistry, produce a large amount of mud, simultaneously, because the existence of PVA brings a difficult problem also for the regeneration of waste water.Therefore, to the recovery of slurry in the desized wastewater, not only can be with utilization of waste material, environmental contamination reduction, and can alleviate biochemical burden, and being conducive to the dyeing waste water biochemical treatment, reduce mud discharges, and also helps 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.Contain a large amount of wetting ability hydroxyls on the molecular chain of the main component polyvinyl alcohol (PVA) of slurry, have good water-soluble, by synthetic gelifying agent with selective reaction activity, make the hydroxyl generation polymer chemistry reaction of gelifying agent and PVA, hydroxyl is implemented sealing treatment, in a single day PVA loses water-soluble, just can precipitate and separate.The SS-PERCLER method adopts SS-PQ, and the medicaments such as SS-AQ are implemented the net effect that cohesion, gel, absorption are multiplied each other to PVA, and clearance reaches 98%.If PVA move back waste water content 8g/L the time, CODcr be 12000mg/L after removing 98%, make CODcr be down to 240mg/L, enter routine biochemistry with other processing wastewater and 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, when the PVA of desized wastewater concentration reached 12g/L, the rate of recovery reached 90%.The PVA concentration that contains in the rate of recovery of PVA and the waste water is relevant, and when the PVA concentration that contains in the waste water during less than 5g/L, the rate of recovery is very low.In most cases, the PVA concentration in the desized wastewater is less than 5g/L, how between 0.5～2.5g/L, therefore, preferably desized wastewater is concentrated after, carry out again PVA and reclaim.In addition, owing to add a large amount of borax and sodium sulfate, consume a large amount of pharmaceutical chemicalss on the one hand, on the other hand, a large amount of boraxs and sodium sulfate are dissolved in the waste water, cause salinity height in the waste water, cause burden for the biochemical system of wastewater treatment.The Li Wen pin has been introduced and has been adopted spiral wound to reclaim the method for PVA from desized wastewater, and the rate of recovery can reach more than 90%, contains 3%～5% PVA in the concentrated solution, after replenishing PVA, can make again usefulness of slurry, and still, the film systemic contamination is very serious, and running cost is high.This shows that although the treatment process of desized wastewater is existing many, existing desized wastewater is processed and all there is such or such deficiency in the method for mud decrement.
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 the pre-treatment is adjusted the pH value in advance, then utilize the amylolysis material to be hydrolyzed starch mud in the desized wastewater, to reduce stickiness and the ionic concn of desized wastewater, at last again the desized wastewater behind the hydrolyzed starch mud is imposed the film separable programming, and then make desized wastewater reach the effect of solid-liquid separation, to obtain recycle-water, by this, follow-up when carrying out solid-liquid separation effectively to delay, the incrustation of filter membrane stops up the generation with filter cake, and is relative that the film life cycle life-span is prolonged.
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, be provided with filtering net along water (flow) direction in the temporary tank, the end of temporary tank is connected with an 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.Be provided with 2-4 filtering net in the described temporary tank.Described neutralization reaction groove top is provided with the alkali lye transfer lime.This beneficial effect of the invention: 1, every effluent index meets the requirement of country and local relevant water quality standard; 2, system's operation is simple and reliable, safe, easy to operate, reduces running cost and investment cost; 3, select processing technological flow weak point, feasibility, shock-resistant, treatment effect to stablize; 4, convenient operation and management, be convenient to safeguard.
Summary of the invention
The object of the invention is to the problem for existing desized wastewater treatment technology existence, sludge quantity when the efficient processing that can realize desized wastewater being provided and reducing wastewater treatment reduces the intractability of dyeing waste water and processing and the mud decrement devices and methods therefor of a kind of desized wastewater of alleviating the 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 the 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 dialyzate outlet of membrane filtration system connects the filtrate collection pond, and the concentrated solution outlet of membrane filtration system connects the concentrated solution collecting tank;
Concentrated solution treatment system: comprise medicament basin, retort, setting tank, filtration unit and precipitation holding tank; The 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 the 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 the 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 the discharge of wastewater mouth, and 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 the biochemical treatment system, air-floating apparatus, the sludge outlet of biochemistry pool and second pond, the 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 the flocculation tank import, the flocculation tank outlet connects three grades of mud pump outlet, three grades of mud pump outlet connect the water extracter import, the filtrate outlet of water extracter connects the import of supernatant liquor reflux pump, and the clod that water extracter produces is then transported outward.
Membrane filtration system in the 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 the described desized wastewater concentration systems is 3～6bar, and temperature is 70～85 ℃.
Retort in the 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 may further comprise the steps:
1) pulp separation: desized wastewater is pumped into strainer, be collected in after filtering in the wastewater collection pond, be delivered to heat exchanger through the waste water transferpump again waste water is heated, it is concentrated then to enter membrane filtration system, gets filtrate and concentrated solution; Filtrate enters the filtrate collection pond, and concentrated solution enters the concentrated solution collecting tank;
2) concentrated solution is processed: 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 pharmacy jar, pump enters setting tank after the reaction, and device carries out solid-liquid separation and gets slurry sediment and filtered wastewater after filtration again; Slurry sediment is stored in the precipitation holding tank; The wastewater collection that filtering separation gets enters biochemical treatment of wastewater in the filtrate collection pond;
3) biochemical treatment: with step 1) and step 2) filtrate and the mercerizing waste water in the printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water that are collected in the filtrate collection pond of gained mixes in wastewater equalization pond, separates to get qualified discharge waste water and sludge slurry through flocculation reaction, precipitate and separate with the laggard second pond of biochemical treatment again;
4) sludge treatment:
(1) electrolysis: the sludge slurry of settling tank, biochemistry pool and second pond in the step 3) biochemical treatment and the scum silica frost of air-floating apparatus are entered the electrolysis machine electrolysis through pipeline and sludge pump;
(2) gravity concentration: the mud after the electrolysis sent into carry out gravity concentration in the gravity concentration tank, so that the free radical that electrolysis produces further reacts with mud, destroy the structure of mud, crack the microbial cell wall, the cell juice in the extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it easier of Institute of Micro-biology utilizes, and then be back in the biochemistry pool of biochemical treatment system recycle by the supernatant liquor reflux pump;
(3) flocculation sediment: the mud behind the gravity concentration is pumped into flocculation tank, in flocculation tank, add flocculation agent by chemicals dosing plant and carry out flocculation reaction;
(4) dehydration: the mud after the flocculation reaction is fully pumped into dewater in the water extracter to get clod and filtrate, and filtrate is back in the biochemistry pool of step 3) biochemical treatment, finishes desized wastewater and processes and mud decrement.
In step 1), the temperature of described heating can be 70～85 ℃; 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 to add flocculation agent, coagulant aids and the gas floatation agent that has prepared in flocculation tank, carrying out entering settling tank after the 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 separate on air-floating apparatus top enters sludge treating system through pipeline, and filtrate is pumped via pipes in the biochemistry pool; The waste water of air-floating apparatus bottom pumps in the biochemistry pool, through aerobic or anaerobism+aerobic or double oxygen+aerobic processing, and again through the 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 sulfuric acid ferrous iron, 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 the mud, organic substance decomposing.
In step 4) (3) part, described flocculation reaction is the flocculation tank that the mud that gravity concentration tank produces is pumped into the sludge treatment step through pipeline and secondary sludge pump, in flocculation tank, add flocculation agent by chemicals dosing plant, pump into water extracter by three grades of sludge pumps after reacting completely;
Described flocculation agent can be selected from least a in aluminium salt, molysite, poly-aluminium, Polyferric Sulfate, organic polymer coargulator, the microbial flocculant etc.;
Described aluminium salt is optional from Tai-Ace S 150 or aluminum chloride etc.; Optional a kind of in ferric sulfate, ferrous sulfate, iron(ic) chloride etc. of described molysite; A kind of in the optional auto-polymerization aluminum chloride of described poly-aluminium, polyaluminium sulfate, the polymer aluminium silicate etc.; A kind of in the optional auto-polymerization iron(ic) chloride of Polyferric Sulfate, bodied ferric sulfate, the polymeric silicicacid iron etc.; The preferred iron(ic) chloride of described flocculation agent etc.
In step 4) (4) part, described dehydration can be adopted a kind of in filter-press dehydration, centrifuge dehydration, the vacuum filtering and dewatering etc.
Compared with the prior art, the present invention has following advantage:
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 the organic pollutant total amount accounts for half.Because the at present textile industry chemical sizwes that contain polyvinyl alcohol (PVA) that use often contain many PVA, usually BOD more in the desized wastewater
5/ COD
CrAbout=0.1, belong to and be difficult to biochemical organic waste water, in order to improve the intractability of dyeing waste water, done large quantity research both at home and abroad.With the desized wastewater membrane concentration, make that PVA content reaches 30000～100000mg/L in the concentrated solution, with the gel salting-out process PVA in the concentrated solution is precipitated again, not only can significantly alleviate the intractability of dyeing waste water, and can reclaim PVA more than 90%, realize the recycle and reuse of PVA in the desized wastewater.
2, significantly alleviated the processing load for the treatment of of dyeing wastewater biochemical system
Often contain many PVA in the desized wastewater, belong to and be difficult to biochemical organic waste water, after the PVA in the 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, the minimizing of the amount of mud is made an appointment with half in the treatment of dyeing wastewater process
During 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 causes very large processing load up to 500～3000 yuan/tons to printing and dyeing enterprise.Because the organism in the desized wastewater accounts for about half of dyeing wastewater through organic matter total amount, by wherein PVA is reclaimed, the mud that treatment of dyeing wastewater is produced reduces approximately half.
4, solve dyeing waste water recycling utilization membrane pollution problem
Printing and dyeing enterprise is the water rich and influential family, also is heavy polluter, for water saving, reduces dyeing waste water discharging environmental pollution, and in recent years, many enterprises set about after the biochemical treatment of dyeing waste water process, again through membrane sepn, and recycling utilization.But the film system can find to have a large amount of spawns to stop up when operation, causes the film systemic contamination serious, cleans frequently, and severe patient causes the film system crash.Tracing it to its cause, is exactly that the PVA that contains in the waste water causes, and by the PVA in the 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 the source.
Description of drawings
Fig. 1 is that the processing of desized wastewater of the present invention and the structure of mud decrement device embodiment form synoptic diagram.
Embodiment
The present invention be to existing desized wastewater treatment technology through further investigation after, process and the mud decrement apparatus and method for a kind of desized wastewater based on membrane concentration that the physicochemical property of desized wastewater proposes.
Be further described below in conjunction with processing and the mud decrement device of accompanying drawing to desized wastewater of the present invention.
Referring to Fig. 1, the processing of desized wastewater of the present invention and mud decrement device are made of desized wastewater concentration systems, concentrated solution treatment system, biochemical treatment system and sludge treating system.
The desized wastewater concentration systems is made 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.The 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 extracter 48.
The import of the fine filter 11 of desized wastewater concentration systems connects with the 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, the import of heat exchanger 14 outlet connecting film filtering systems 15, the dialyzate 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 the desized wastewater concentration systems, and the precipitation outlet of filtration unit 24 connects with the import of precipitation holding tank 25.
The import of the sludge pump 41 of sludge treating system connects settling tank 33 in the 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, and the clod that water extracter 48 produces is then transported outward.
The operating pressure of the membrane filtration system 15 in the described desized wastewater concentration systems is 3～6bar, and temperature is 70～85 ℃.
Processing and the mud decrement of a kind of desized wastewater of the present invention may further comprise the steps:
Step (1) pulp separation: desized wastewater is pumped into fine filter 11, behind fine filtering, be collected in the wastewater collection pond 12, be delivered to heat exchanger 14 through waste water transferpump 13 again waste water is heated to 70～85 ℃, then enter membrane filtration system 15 and concentrate 5～20 times, getting 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 is processed: 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 pharmacy jar 21, pump enters setting tank 23 behind reaction 15～22min, installs after filtration 24 again and carries out solid-liquid separation and get slurry sediment and filtered wastewater; Slurry sediment is stored in the precipitation holding tank 25; The wastewater collection that filtering separation gets enters biochemical treatment of wastewater in filtrate collection pond 16.
Step (3) biochemical treatment: filtrate and the mercerizing waste water in the printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water that step (1) and step (2) gained are collected in the filtrate collection pond 16 mix in wastewater equalization pond, separate to get qualified discharge waste water and sludge slurry through flocculation reaction, precipitate and separate, the laggard second pond of biochemical treatment again;
Step (4) sludge treatment: 1) electrolysis: the scum silica frost of the sludge slurry of settling tank 33, biochemistry pool 35 and second pond 36 and air-floating apparatus 34 enters electrolysis machine 42 electrolysis through pipeline and sludge pump 41 in step (3) biochemical treatment; 2) gravity concentration: the mud after the electrolysis enters gravity concentration tank 43, so that the free radical that electrolysis produces further reacts with mud, destroy the structure of mud, crack the microbial cell wall, the cell juice in the extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it easier of 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 behind the gravity concentration is pumped into flocculation tank 46, in flocculation tank 46, add flocculation agent by chemicals dosing plant and carry out flocculation reaction; 4) dehydration: the mud after the flocculation reaction is fully pumped into dewater in the water extracter 48 to get 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, the printing and dyeing mill, then carries out biochemical treatment.
The described flocculation reaction of step (3) biochemical treatment is to add flocculation agent, coagulant aids and the gas floatation agent that has prepared in flocculation tank 32, carrying out entering settling tank 33 after the flocculation reaction separates, settling tank 33 bottoms precipitation enters 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 separate on air-floating apparatus 34 tops enters sludge treating system through pipeline, and filtrate is pumped via pipes in the biochemistry pool 35.
The described flocculation agent of step (3) biochemical treatment 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.
The described waste water with air-floating apparatus 34 bottoms of step (3) biochemical treatment pumps in the biochemistry pool 35, through aerobic or anaerobism+aerobic or double oxygen+aerobic processing, again through second pond 36 precipitate and separate, waste water after the outflow biochemical treatment of second pond 36 tops, the precipitation of second pond 36 bottoms enters sludge treating system through pipeline.
The top layer of electrolysis machine 42 anodes of the described electrolysis of step (4) sludge treatment 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.
The operating voltage of the electrolyzer of the described electrolysis of step (4) sludge treatment can be 2～250V, and adjacent two interelectrode voltages can be 2～18V, and current density can be 3～400mA/cm
2
The described gravity concentration of step (4) sludge treatment is that the mud after the electrolysis is deposited in 48～72h in the gravity concentration tank 43, makes the dead microorganism broken wall liquefaction in the mud, organic substance decomposing.
The described flocculation of step (4) sludge treatment is that the mud that gravity concentration tank 43 produces is entered 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, pump into water extracter 48 by three grades of sludge pumps 47 after reacting completely.
The flocculation agent of the described flocculation of 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 the microbial flocculant; Optimum flocculent is iron(ic) chloride.
The described dehydration of step (4) sludge treatment is a kind of 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: be that the desized wastewater of 13000mg/L pumps into fine filter 11 with COD, behind fine filtering, be collected in the wastewater collection pond 12, be delivered to heat exchanger 14 through waste water transferpump 13 again waste water is heated to 70 ℃, then enter membrane filtration system 15 and concentrate 5 times, getting filtrate and the COD that COD is 1530mg/L is the 58891mg/L concentrated solution; Filtrate enters filtrate collection pond 16, and concentrated solution enters concentrated solution collecting tank 17;
(2) concentrated solution is processed: 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 pharmacy jar 21, pump enters setting tank 23 behind reaction 15～22min, installs after filtration 24 again and carries out solid-liquid separation and get slurry sediment and filtered wastewater; Slurry is stored in the precipitation holding tank 25; The wastewater collection that filtering separation gets enters biochemical treatment of wastewater in filtrate collection pond 16.
(3) biochemical treatment: filtrate and the mercerizing waste water in the printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water that step (1), (2) gained are collected in the filtrate collection pond 16 mix in the wastewater equalization pond 31 of biochemical treatment system, again through flocculation reaction, precipitate and separate, the laggard second pond of biochemical treatment separate COD less than 55mg/L waste water and sludge slurry;
(4) sludge treatment: 1) electrolysis: the scum silica frost of the sludge slurry of settling tank 33, biochemistry pool 35 and second pond 36 and air-floating apparatus 34 enters electrolysis machine 42 electrolysis through pipeline and sludge pump 41 in step (3) biochemical treatment; 2) gravity concentration: the mud after the electrolysis enters gravity concentration tank 43, so that the free radical that electrolysis produces further reacts with mud, destroy the structure of mud, crack the microbial cell wall, the cell juice in the extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it easier of 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 behind the gravity concentration is pumped into flocculation tank 46, in flocculation tank 46, add flocculation agent by chemicals dosing plant and carry out flocculation reaction; 4) dehydration: the mud after the flocculation reaction is fully pumped into dewater in the water extracter 48 to get clod and filtrate, and filtrate is back in the biochemistry pool 46 of step (3) biochemical treatment.4) dehydration: with the mud after the flocculation reaction fully by three grades of sludge pumps 47 pump into dewater in the water extracter 48 water ratio less than 60% clod and filtrate.
Embodiment 2
Certain COD is processing and the mud decrement embodiment of the desized wastewater of 4500mg/L:
(1) pulp separation: be that the desized wastewater of 4500mg/L pumps into fine filter 11 with COD, behind fine filtering, be collected in the wastewater collection pond 12, be delivered to heat exchanger 14 through waste water transferpump 13 again waste water is heated to 70 ℃, then enter membrane filtration system 15 and concentrate 20 times, getting filtrate and the COD that COD is 910mg/L is the 72710mg/L concentrated solution; Filtrate enters filtrate collection pond 16; Concentrated solution enters concentrated solution collecting tank 17;
(2) concentrated solution is processed: 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 pharmacy jar 21, pump enters settling tank 23 behind reaction 15～22min, installs after filtration 24 again and carries out solid-liquid separation and get slurry sediment and filtered wastewater; Slurry is stored in the precipitation holding tank 25; The wastewater collection that filtering separation gets enters biochemical treatment of wastewater in filtrate collection pond 16.
(3) biochemical treatment: filtrate and the mercerizing waste water in the printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water that step (1), (2) gained are collected in the filtrate collection pond 16 mix in the wastewater equalization pond 31 of biochemical treatment system, again through flocculation reaction, precipitate and separate, the laggard second pond of biochemical treatment separate COD less than 55mg/L waste water and sludge slurry;
(4) sludge treatment: 1) electrolysis: the scum silica frost of the sludge slurry of settling tank 33, biochemistry pool 35 and second pond 36 and air-floating apparatus 34 enters electrolysis machine 42 electrolysis through pipeline and sludge pump 41 in step (3) biochemical treatment; 2) gravity concentration: the mud after the electrolysis enters gravity concentration tank 43, so that the free radical that electrolysis produces further reacts with mud, destroy the structure of mud, crack the microbial cell wall, the cell juice in the extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it easier of 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 behind the gravity concentration is pumped into flocculation tank 46, in flocculation tank 46, add flocculation agent by chemicals dosing plant and carry out flocculation reaction; 4) dehydration: the mud after the flocculation reaction is fully pumped into dewater in the water extracter 48 to get clod and filtrate, and filtrate is back in the biochemistry pool 46 of step (3) biochemical treatment.4) dehydration: with the mud after the flocculation reaction fully by three grades of sludge pumps 47 pump into dewater in the water extracter 48 water ratio less than 60% clod and filtrate.
Embodiment 3
Certain COD is processing and the mud decrement embodiment of the desized wastewater of 15261mg/L:
(1) pulp separation: be that the desized wastewater of 17261mg/L pumps into fine filter 11 with COD, behind fine filtering, be collected in the wastewater collection pond 12, be delivered to heat exchanger 14 through waste water transferpump 13 again waste water is heated to 70 ℃, then enter membrane filtration system 15 and concentrate 6 times, getting filtrate and the COD that COD is 1511mg/L is the 95822mg/L concentrated solution; Filtrate enters filtrate collection pond 16, and concentrated solution enters concentrated solution collecting tank 17;
(2) concentrated solution is processed: 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 pharmacy jar 21, pump enters settling tank 23 behind reaction 15～22min, installs after filtration 24 again and carries out solid-liquid separation and get slurry sediment and filtered wastewater; Slurry is stored in the precipitation holding tank 25; The wastewater collection that filtering separation gets enters biochemical treatment of wastewater in filtrate collection pond 16.
(3) biochemical treatment: filtrate and the mercerizing waste water in the printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water that step (1), (2) gained are collected in the filtrate collection pond 16 mix in the wastewater equalization pond 31 of biochemical treatment system, again through flocculation reaction, precipitate and separate, the laggard second pond of biochemical treatment separate COD less than 55mg/L waste water and sludge slurry;
(4) sludge treatment: 1) electrolysis: the scum silica frost of the sludge slurry of settling tank 33, biochemistry pool 35 and second pond 36 and air-floating apparatus 34 enters electrolysis machine 42 electrolysis through pipeline and sludge pump 41 in step (3) biochemical treatment; 2) gravity concentration: the mud after the electrolysis enters gravity concentration tank 43, so that the free radical that electrolysis produces further reacts with mud, destroy the structure of mud, crack the microbial cell wall, the cell juice in the extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it easier of 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 behind the gravity concentration is pumped into flocculation tank 46, in flocculation tank 46, add flocculation agent by chemicals dosing plant and carry out flocculation reaction; 4) dehydration: the mud after the flocculation reaction is fully pumped into dewater in the water extracter 48 to get clod and filtrate, and filtrate is back in the biochemistry pool 46 of step (3) biochemical treatment.4) dehydration: with the mud after the flocculation reaction fully by three grades of sludge pumps 47 pump into dewater in the water extracter 48 water ratio less than 60% clod and filtrate.
Embodiment 4
Certain COD is processing and the mud decrement embodiment of the desized wastewater of 4300mg/L:
(1) pulp separation: be that the desized wastewater of 4590mg/L pumps into fine filter 11 with COD, behind fine filtering, be collected in the wastewater collection pond 12, be delivered to heat exchanger 14 through waste water transferpump 13 again waste water is heated to 70 ℃, then enter membrane filtration system 15 and concentrate 8 times, getting filtrate and the COD that COD is 955mg/L is the 30032mg/L concentrated solution; Filtrate enters filtrate collection pond 16; Concentrated solution enters concentrated solution collecting tank 17;
(2) concentrated solution is processed: 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 pharmacy jar 21, pump enters settling tank 23 behind reaction 15～22min, installs after filtration 24 again and carries out solid-liquid separation and get slurry sediment and filtered wastewater; Slurry is stored in the precipitation holding tank 25; The wastewater collection that filtering separation gets enters biochemical treatment of wastewater in filtrate collection pond 16.
(3) biochemical treatment: filtrate and the mercerizing waste water in the printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water that step (1), (2) gained are collected in the filtrate collection pond 16 mix in the wastewater equalization pond 31 of biochemical treatment system, again through flocculation reaction, precipitate and separate, the laggard second pond of biochemical treatment separate COD less than 55mg/L waste water and sludge slurry;
(4) sludge treatment: 1) electrolysis: the scum silica frost of the sludge slurry of settling tank 33, biochemistry pool 35 and second pond 36 and air-floating apparatus 34 enters electrolysis machine 42 electrolysis through pipeline and sludge pump 41 in step (3) biochemical treatment; 2) gravity concentration: the mud after the electrolysis enters gravity concentration tank 43, so that the free radical that electrolysis produces further reacts with mud, destroy the structure of mud, crack the microbial cell wall, the cell juice in the extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it easier of 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 behind the gravity concentration is pumped into flocculation tank 46, in flocculation tank 46, add flocculation agent by chemicals dosing plant and carry out flocculation reaction; 4) dehydration: the mud after the flocculation reaction is fully pumped into dewater in the water extracter 48 to get clod and filtrate, and filtrate is back in the biochemistry pool 46 of step (3) biochemical treatment.4) dehydration: with the mud after the flocculation reaction fully by three grades of sludge pumps 47 pump into dewater in the water extracter 48 water ratio less than 60% clod and filtrate.
Claims (10)
1. the processing of a desized wastewater and 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 the 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 dialyzate outlet of membrane filtration system connects the filtrate collection pond, and the concentrated solution outlet of membrane filtration system connects the concentrated solution collecting tank;
Described concentrated solution treatment system comprises medicament basin, retort, setting tank, filtration unit and precipitation holding tank; The 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 the 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 the 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 the discharge of wastewater mouth, and 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 the biochemical treatment system, air-floating apparatus, the sludge outlet of biochemistry pool and second pond, the 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 the flocculation tank import, the flocculation tank outlet connects three grades of mud pump outlet, three grades of mud pump outlet connect the water extracter import, the filtrate outlet of water extracter connects the import of supernatant liquor reflux pump, and the clod that water extracter produces is then transported outward.
2. as claimed in claim 1 a kind of processing of desized wastewater and mud decrement device is characterized in that the membrane filtration system in the 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 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 the described desized wastewater concentration systems can be 3～6bar, and temperature can be 70～85 ℃.
3. as claimed in claim 1 a kind of processing of desized wastewater and mud decrement device, it is characterized in that retort in the 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.
4. a desized wastewater is processed and the method for mud decrement, it is characterized in that employing is 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 strainer, be collected in after filtering in the wastewater collection pond, be delivered to heat exchanger through the waste water transferpump again waste water is heated, it is concentrated then to enter membrane filtration system, gets filtrate and concentrated solution; Filtrate enters the filtrate collection pond, and concentrated solution enters the concentrated solution collecting tank;
2) concentrated solution is processed: 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 pharmacy jar, pump enters setting tank after the reaction, and device carries out solid-liquid separation and gets slurry sediment and filtered wastewater after filtration again; Slurry sediment is stored in the precipitation holding tank; The wastewater collection that filtering separation gets enters biochemical treatment of wastewater in the filtrate collection pond;
3) biochemical treatment: with step 1) and step 2) filtrate and the mercerizing waste water in the printing and dyeing mill, the waste water of weaving cotton cloth, dyeing and finishing wastewater and other waste water that are collected in the filtrate collection pond of gained mixes in wastewater equalization pond, separates to get qualified discharge waste water and sludge slurry through flocculation reaction, precipitate and separate with the laggard second pond of biochemical treatment again;
4) sludge treatment:
(1) electrolysis: the sludge slurry of settling tank, biochemistry pool and second pond in the step 3) biochemical treatment and the scum silica frost of air-floating apparatus are entered the electrolysis machine electrolysis through pipeline and sludge pump;
(2) gravity concentration: the mud after the electrolysis sent into carry out gravity concentration in the gravity concentration tank, so that the free radical that electrolysis produces further reacts with mud, destroy the structure of mud, crack the microbial cell wall, the cell juice in the extracellular microbial flows out, and enters water, make the solidity material of difficult degradation become the dissolved matter of easy degraded, make it easier of Institute of Micro-biology utilizes, and then be back in the biochemistry pool of biochemical treatment system recycle by the supernatant liquor reflux pump;
(3) flocculation sediment: the mud behind the gravity concentration is pumped into flocculation tank, in flocculation tank, add flocculation agent by chemicals dosing plant and carry out flocculation reaction;
(4) dehydration: the mud after the flocculation reaction is fully pumped into dewater in the water extracter to get clod and filtrate, and filtrate is back in the biochemistry pool of step 3) biochemical treatment, finishes desized wastewater and processes and mud decrement.
5. a kind of desized wastewater is processed and the method for mud decrement as claimed in claim 4, it is characterized in that in step 1) the temperature of described heating is 70～85 ℃; Described concentrating is concentrated 5～20 times; In step 2) in, the time of described reaction can be 15～22min.
6. a kind of desized wastewater is processed and the method for mud decrement as claimed in claim 4, it is characterized in that in step 3), described flocculation reaction, precipitate and separate and biochemical treatment are to add flocculation agent, coagulant aids and the gas floatation agent that has prepared in flocculation tank, carrying out entering settling tank after the 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 separate on air-floating apparatus top enters sludge treating system through pipeline, and filtrate is pumped via pipes in the biochemistry pool; The waste water of air-floating apparatus bottom pumps in the biochemistry pool, through aerobic or anaerobism+aerobic or double oxygen+aerobic processing, and again through the 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 sulfuric acid ferrous iron, ferric sulfate, Polyferric Sulfate, Tai-Ace S 150, aluminum chloride, poly-aluminium of described flocculation agent or two kinds.
7. a kind of desized wastewater is processed and the method for mud decrement as claimed in claim 4, 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 can be titanium plate or plastic plate; 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
8. a kind of desized wastewater is processed and the method for mud decrement as claimed in claim 4, it is characterized in that step 4) (2) partly in, the time of described gravity concentration is 48～72h.
9. a kind of desized wastewater is processed and the method for mud decrement as claimed in claim 4, it is characterized in that in step 4) (3) part, described flocculation reaction is the flocculation tank that the mud that gravity concentration tank produces is pumped into the sludge treatment step through pipeline and secondary sludge pump, in flocculation tank, add flocculation agent by chemicals dosing plant, pump into water extracter by three grades of sludge pumps after reacting completely;
Described flocculation agent can be selected from least a in aluminium salt, molysite, poly-aluminium, Polyferric Sulfate, organic polymer coargulator, the microbial flocculant etc.;
Described aluminium salt is optional from Tai-Ace S 150 or aluminum chloride etc.; Optional a kind of in ferric sulfate, ferrous sulfate, iron(ic) chloride etc. of described molysite; A kind of in the optional auto-polymerization aluminum chloride of described poly-aluminium, polyaluminium sulfate, the polymer aluminium silicate etc.; A kind of in the optional auto-polymerization iron(ic) chloride of Polyferric Sulfate, bodied ferric sulfate, the polymeric silicicacid iron etc.; The preferred iron(ic) chloride of described flocculation agent etc.
10. a kind of desized wastewater is processed and the method for mud decrement as claimed in claim 4, it is characterized in that in step 4) (4) part, and described dehydration is a kind of in employing filter-press dehydration, centrifuge dehydration, the vacuum filtering and dewatering.
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| CN103922449A (en) * | 2014-04-04 | 2014-07-16 | 张爱均 | Efficient environment-friendly flocculant for treatment of black-odor river |
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| CN105169757A (en) * | 2015-09-23 | 2015-12-23 | 邓永辉 | Waste dehydrating system |
| CN107512843A (en) * | 2017-07-17 | 2017-12-26 | 中山大学 | A kind of sludge dewatering system and its dewatering based on circulation saline solution dialysis |
| CN107512820A (en) * | 2016-06-16 | 2017-12-26 | 吴江市新达印染厂 | The minimizing technology of antimony in a kind of dyeing waste water |
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