CN104649521B - The printing-dyeing waste water treatment process of circulation in a kind of muddy water strengthening - Google Patents

The printing-dyeing waste water treatment process of circulation in a kind of muddy water strengthening Download PDF

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CN104649521B
CN104649521B CN201510094247.9A CN201510094247A CN104649521B CN 104649521 B CN104649521 B CN 104649521B CN 201510094247 A CN201510094247 A CN 201510094247A CN 104649521 B CN104649521 B CN 104649521B
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pond
waste water
regulating reservoir
dyeing waste
water
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CN104649521A (en
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石泰山
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石泰山
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/30Nature of the water, waste water, sewage or sludge to be treated from the textile industry
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes

Abstract

In muddy water strengthening, a printing-dyeing waste water treatment process for circulation, relates to treatment of dyeing wastewater and sludge circulation utilization. Dyeing waste water is collected in wastewater collection pond, waste water is divided into three parts, pump into respectively acidification reaction pond, neutralization reaction pond and regulating reservoir, waste water in neutralization reaction pond is from flowing into a heavy pond, waste water after precipitation is from flowing into regulating reservoir, when regulating reservoir pH is lower than 6.5 time, part waste water pumps into regulating reservoir, makes regulating reservoir wastewater pH be greater than 6.5; By the part sludge reflux in a heavy pond to acidification reaction pond and neutralization reaction pond; Waste water in regulating reservoir is pumped into hydrolysis acidification pool, and then gravity flow enters intermediate pool, anoxic pond, Aerobic Pond, second pond successively; By the part sludge reflux of second pond to regulating reservoir, anoxic pond, Aerobic Pond, neutralization reaction pond; By the waste water of second pond, from flowing into transition pond, coagulating basin, after coagulating, waste water gravity flow enters final deposition pool, and the sludge reflux of final deposition pool is to neutralization reaction pond, the discharge of wastewater of final deposition pool; By concentrated a heavy pond mud or directly press filtration, or pump into press filtration after digestion in sludge digestion tank, digester water outlet enters in regulating reservoir.

Description

The printing-dyeing waste water treatment process of circulation in a kind of muddy water strengthening
Technical field
The present invention relates to treatment of dyeing wastewater and sludge circulation utilization, especially relate to the dyeing waste water of circulation in a kind of muddy water strengtheningTreatment process.
Background technology
Dyeing waste water generally comprises cotton and cotton blending dyeing waste water, hair dyeing waste water, waste water from washing wool, silk dyeing and finishing waste water, silk spinningRefining wastewater, silk reeling wastewater, numb dyeing waste water, chemical fibre dyeing waste water, wax-dyeing process waste water etc. Gathering in common dyeing waste waterThe B/C of vinyl alcohol (PVA) slurry and dyestuff is little, and biodegradability is poor, affects COD and the colourity qualified discharge of waste water, auxiliary agent,Surfactant, temperature, colourity, basicity etc. affect microbial activity and wastewater regenerating and recycling.
Dyeing water treatment method is common is aerobe processing, preposition anaerobism, hydrolysis acidification, materialization coagulation etc. one or severalCombination is as pretreatment, to increase the B/C ratio of waste water. In the time that aerobic biological treatment cannot satisfy regulatory requires, need to increase the degree of depthProcess as biofilter, advanced oxidation, coagulation decoloration, sand filtration, sterilization etc.
Cotton and cotton blending printing-dyeing waste water treatment process divides composite waste treatment process and waste water sub-prime treatment process. Composite waste processingTechnique comprises grid-pH adjustment-regulating reservoir-hydrolysis acidification-aerobe processing-materialization processing; Waste water sub-prime treatment process comprises and boilingThe high-concentration waste waters such as white silk, destarch after anaerobism or hydrolysis acidification again with other waste water mixed processing, the spent lye of alkali decrement returns through alkaliReceive recycling after again with other waste water mixed processing.
Printing and dyeing enterprise is the market demand that adapts to the many kinds of small lot, causes the kind of dyes of dyeing waste-water and fluctuation of concentration larger,Make the production management of waste water decoloring technique become complicated, lack and automatically control and automatic early-warning, the production management of waste water treatment is difficult toAccording to colourity, corresponding discoloration method is taked in variation. The concentrated waste water treatment facility of printing and dyeing industry garden or printing and dyeing production base is receivedThe kind of dyes that comprises of waste water more more complete, the more difficult random fluctuation of decoloration process is to tackle various dyestuffs. Use broad-spectrum high efficacyDecolorizer make decolorizing printing and dyeing waste water relatively easy, make to adopt different decolorizers according to different dyes in waste water production management processRelatively simplify.
Slurry is mainly polyvinyl alcohol (PVA), and biodegradability is poor, and source is used biodegradable green slurry can reduce PVAUse amount, or use various technology to reclaim PVA slurry, or in end treatment process, extend the slurry time of staying or adopt efficient anti-Answer device to increase the means such as sludge concentration and promote slurry biodegradation. PVA slurry advantage is a lot, is difficult to eliminate or replace completely, returnsReceipts technology is still unstable; The anaerobism of end treatment, hydrolysis acidification are the effective ways that increase the B/C ratio of PVA slurry, but shouldTechnique is easily subject to the impact of sulfate radical in waste water reduction, and dyestuff is easily reduced to amine substance, with the increase of the PVA degree of polymerization,The time of staying that need to increase waste water could promote the degraded of the PVA in waste water.
Printing and dyeing relate to dyestuff water-insoluble dye and water-soluble dye, and water-insoluble dye is as disperse dyes, reducing dye, sulphurChange dyestuff etc. is suspension or colloid in waste water, be easy to be decoloured by inorganic coagulant, and water-soluble dye is as reactive dye and sunIonic dye is difficult for being decoloured by inorganic coagulant. Anaerobic hydrolysis, charcoal absorption, chemical oxidation to water-soluble dye effectively andPoor to water-insoluble dye effect. Aerobic activated sludge is to dye decolored many absorption owing to activated sludge. In chemical oxidationOzone oxidation be but that the better method cost of decolouring is higher, better but sludge quantity is large, clorox is into Fenton reagent effectThis lower decolorizer can cause and accelerate azo bond cracking but easily produce carcinogenic aniline and other noxious materials.
Chinese patent CN1240624 discloses a kind of bioremediation of the dyeing waste water containing aniline, adopts anaerobic baffle plate anti-Answer device (ABR) and order to criticize the treatment process that sequencing batch reactor activated sludge reaction device (SBR) combines. Chinese patent CN100361910Open a kind of four step printing-dyeing waste water treatment process with anaerobism-anoxic-aerobic-coagulating sedimentation, utilize anoxic treatment as anaerobismWith aerobic efficient linking transition, improve the biodegradability energy of anaerobic effluent. The open one of Chinese patent CN101638286B containsThe sewage water treatment method of dyeing waste water, carries out water distribution through pretreated sewage via distribution well, and a part of sewage enters one section and exposes to the sunAerobe processing is carried out in gas pond, and another part sewage enters anaerobic fixed film reactor and is hydrolyzed. Chinese patent CN100404440 public affairsOpen a kind of chemical fiber printing alkali reducing quantity waste water resources pretreatment method, first regulate pH value to 2.5~5.0 of waste water with acid, then to uselessIn water, add flocculant, carry out after sufficiently mixing Separation of Solid and Liquid, thereby by 75~90%CODcr contaminants removal in waste water,Improve wastewater biodegradability. Chinese patent CN101456649B discloses a kind of side of dyeing waste water high-efficiency biological strengthening treatmentMethod, by through pretreated dyeing waste water in gravity flow mode or enter the anoxic zone in efficient A/O pond by the mode of water pump lifting;Then waste water enters aerobic zone by the mode of gravity flow.
Chinese patent CN103204608B discloses a kind of dyeing waste water integrated conduct method, and waste water is through using flyash after gridAbsorption, can drop into suitable additive in adsorption process in advance; Go out to regulate pH value to enter in bubble tower after water filtration to enter oneStep decolouring is processed; Then enter hydrolysis acidification pool and carry out after Anaerobic Treatment, enter the further biochemical treatment of BAF, enterRow biological oxidation and hold back suspended solid; Finally by crossing after cartridge filter and ion exchange tower advanced treating. Chinese patentCN103274524B discloses a kind of dyeing waste water preprocess method based on anaerobism section phase detachment technique, and anaerobism section is divided into IPhase and II phase, fermentation and hydrogen production produces acid mutually and methanogenic phase, utilizes the organic matter in waste water that electron donor is provided, and utilizes sulfuric acidThe reducing power of salt reduction process and its reduzate sulfide, realizes effective decolouring of dyestuff mutually at I, improve waste water and can give birth toVoltinism, and realize mutually organic efficient removal at II. It is high that Chinese patent CN101955282B discloses a kind of printing and dyeing enterpriseThe method of saliferous dyeing waste-water zero-emission, first waste water enter regulating reservoir homogeneous, then enters reaction tank, adds sulphur in reaction tankAcid is ferrous to be regulated pH value and coagulating occurs, and after reaction, water outlet enters sedimentation basin precipitation, and sedimentation basin supernatant is through electrochemistryReactor for treatment, then enters that second-level settling pond scums and sediment, then enters aeration tank aeration, after aeration by manganese sand mistakeFilter iron removal by filtration; Water outlet after filtration is first by ultrafiltration membrane treatment, and the dense water of milipore filter is got back to regulating reservoir, and fresh water enters NF membraneProcess; NF membrane output fresh water enters reverse osmosis membrane, and output concentrate recirculation is to regulating reservoir or direct evaporation process; Reverse osmosis membrane is denseWater enters electric dialyzator, and electrodialysis fresh water refluxes as reverse osmosis membrane water inlet, and the dense water of electrodialysis enters evaporimeter and evaporates; SteamSend out the steam producing and can be back to printing and dyeing production, the residue that evaporation produces is as disposition of solid waste; In whole process, do not dischargeWater pollutant.
Chinese patent CN103359897B discloses a kind of technique and device of processing high concentration sulphate textile printing and dyeing wastewater, by heightConcentration sulfate radical textile printing and dyeing wastewater adds pH adjusting agent to carry out neutralization reaction, and reacted waste water regulates in a subtle way laggard through sedimentationElectrolytic cell, becomes low toxicity or innocuous substance with Fe/C electrolysis by large molecule poisonous. Chinese patent CN103058455BOpenly utilize the system of activated coke treatment of dyeing and printing, comprise and connect successively the hydrolysis acidification device, the activated sludge tank, heavy that arrangePond, shallow lake and biofilter; In described hydrolysis acidification device, be added with activated coke, from described hydrolysis acidification device out contain workProperty Jiao's water outlet enters described activated sludge tank again. Chinese patent CN103435217B discloses a kind of locating of dyeing waste water of vulcanizingScience and engineering skill, adopts the comprehensive of preaeration catalytic oxidation, materialization desulfurization, UV-Fenton catalytic oxidation, hydrolysis acidification, catalytic oxidationProcessing method, makes waste water reach first discharge standard. The one that discloses Chinese patent CN103359878B realizes dyeing waste water zeroThe processing method of discharge. This processing method comprises the steps: dyeing waste water stoste to carry out materialization and biochemical treatment; Water outlet is enteredRow sand filtration, ultrafiltration and security personnel filter even depth processing, and the film processing system of then sending into nanofiltration or counter-infiltration carries out film processing; WarpFilm processing obtains fresh water and dense water; Fresh water is low COD soft deionized water, as fresh water (FW) direct reuse in dyeing process,Boiler add water, generally washing or recirculated cooling water; Dense water is the waste water containing organic pollution of high salinity high rigidity, through FentonThe processing of oxidation coupling lime-soda process, is the water outlet of low COD soft high salinity after processing, and by the technological requirement of dyeing, directly mendsAfter salt adding, be back to dyeing process. Chinese patent CN102897936B disclose a kind of dye-printing desizing waste water processing method andDevice, is that the desized wastewater after pre-treatment is adjusted to pH value in advance, then utilizes in starch decomposing material water solution desized wastewaterStarch mud, to reduce stickiness and the ion concentration of desized wastewater, finally again the desized wastewater after hydrolyzed starch mud is imposed to filmSeparable programming, and then make desized wastewater reach the effect of Separation of Solid and Liquid, to obtain recycle-water, by this, follow-up effectively to delayWhile carrying out Separation of Solid and Liquid, the incrustation of filter membrane stops up the generation with filter cake, relative that the film life cycle life-span is extended. China speciallyProfit CN102936084B relates to a kind of printing-dyeing waste water treatment process of zero sludge discharge, and this technique is through IC anaerobism by desized wastewaterPond process after water outlet and aerobic nitrification liquid jointly enter intermittently anoxic pond, make to occur in anoxic pond denitrification, sulphur oxidation, dirt simultaneouslyMud absorption propagation and the dense place of mud, reclaim the nitre state oxygen in aerobic nitrification liquid, the sulphion concentration that reduction enters Aerobic Pond, makes ICSuspended particulate in anaerobic pond water outlet is adsorbed, and clarification and effluent enters oxidation pond. After aerobic excess sludge performance suction-operatedEnter CSTR pond digestion decrement, final excess sludge, after filter press is processed, pumps into fluidized bed furnace by plunger displacement pump and completes dirtMud burns. This technique has significantly improved the settling property of sedimentation mud, improved the clearance of COD, has realized excess sludgeZero-emission, and produce without pernicious gas, environmental protection more, efficient, technique is workable, and one-time investment is low, processes effectFruit obviously. Chinese patent CN101948220B discloses a kind for the treatment of method of printing and dying wastewater. First dyeing waste water being introduced to pulse detestsOxygen reactor carries out Anaerobic Treatment, and Anaerobic Treatment water outlet enters biological contact oxidation pond, and the water outlet of biological contact oxidation pond is from flowing toEnter second pond and carry out Separation of Solid and Liquid, second pond water outlet penetration depth treatment system carry out advanced treating finally obtain can reuse middle water,Described advanced treatment system comprise charcoal fiber ionic membrane treating apparatus, coagulative precipitation tank, filtration with manganese sand device, accurate filter,Ion exchange tower. The present invention re-starts optimum organization to existing ripe waste water treatment process.
Chinese patent CN101830579B discloses a kind of Methods of Color Removal of Dyestuff Effluent and system. The method is by dyeing waste waterPart adjust pH, to acidity, then obtains destainer through interior electrolytic treatments; Then using gained destainer as decolorizer with surplusRemaining dyeing waste water mixes under alkali condition, just can reach the object of decolouring and removal part COD. Chinese patentCN103121737B discloses a kind of method of electrochemical treatments dyeing waste water. Chinese patent CN103183451B discloses onePlant the treatment method of printing and dying wastewater that utilizes compound biological enzyme. In Chinese patent CN102992525B desized wastewater, PVA's returnsReceiving apparatus and method thereof.
Summary of the invention
The object of the present invention is to provide the printing-dyeing waste water treatment process of circulation in a kind of muddy water strengthening.
The present invention includes following steps:
1) dyeing waste water is collected in wastewater collection pond;
2) dyeing waste water in wastewater collection pond is divided into three parts:
The dyeing waste water of Part I pumps in acidification reaction pond, regulates pH value to 2.0~4.5 of dyeing waste water in acidification reaction pond;
The dyeing waste water of Part II pumps in neutralization reaction pond and mixes with the water outlet of acidification reaction pond, adjusts dyeing waste water pH value extremely6.0~8.5;
The dyeing waste water of Part III is introduced regulating reservoir for regulating the dyeing waste water pH value of regulating reservoir;
3) the waste water gravity flow in neutralization reaction pond is entered to a heavy pond, the waste water gravity flow after a heavy pond precipitation enters regulating reservoir,Regulating reservoir is provided with overfall;
When regulating reservoir pH is lower than 6.5 time, the part dyeing waste water in wastewater collection pond is pumped into regulating reservoir, make regulating reservoir waste waterPH is greater than 6.5;
By the part sludge reflux in a heavy pond, to acidification reaction pond, part sludge reflux is to neutralization reaction pond;
4) waste water in regulating reservoir is pumped into hydrolysis acidification pool, then gravity flow enters intermediate pool, anoxic pond, Aerobic Pond, two successivelyHeavy pond;
5) by step 4) in the part sludge reflux of second pond to regulating reservoir, part sludge reflux is to anoxic pond and Aerobic Pond, twoThe excess sludge in heavy pond pumps into neutralization reaction pond;
6) the waste water gravity flow of second pond is entered to transition pond, coagulating basin, after coagulating, waste water gravity flow enters final deposition pool, final deposition poolSludge reflux to neutralization reaction pond, the discharge of wastewater of final deposition pool; Transition pond return of waste water to regulating reservoir for regulating regulating reservoirWater temperature or water level;
7) by step 3) in a heavy pond mud be collected in sludge concentration tank, or directly press filtration, or pump in sludge digestion tankPress filtration after digestion, digester water outlet enters in regulating reservoir.
In step 1) in, the hydraulic detention time in described wastewater collection pond can be 0.5~1h.
In step 2) in, in described adjusting acidification reaction pond, pH value to 2.0~4.5 of dyeing waste water, can add sulfuric acid, hydrochloric acidOr ferrous sulfate etc. regulates pH value to 2.0~4.5; The hydraulic detention time in described acidification reaction pond, neutralization reaction pond can be 0.5~1h。
In step 3) in, described in the return sludge ratio that is back to acidification reaction pond and is back to neutralization reaction pond can be 25%~50%;The surface loading in one heavy pond can be 1.0~2.5m3/m2H, the hydraulic detention time in acidification reaction pond and neutralization reaction pond can be 2.0~3.0h; The hydraulic detention time of regulating reservoir can be 6~12h, and the water level of regulating reservoir can be 50%~90% of regulating reservoir total height,The water temperature of regulating reservoir can be 30~38 DEG C.
In step 4) in, the part return of waste water of described intermediate pool is to regulating reservoir, for regulating water temperature or the water level of regulating reservoir;
The hydraulic detention time of described hydrolysis acidification pool can be 6~12h;
The hydraulic detention time of described intermediate pool can be 0.5~1.0h;
The hydraulic detention time of described anoxic pond can be 5.0~10.0h;
The hydraulic detention time of described Aerobic Pond can be 15.0~30.0h;
The surface loading of described second pond can be 1.0~2.5m3/m2H, hydraulic detention time can be 2.0~3.0h.
In step 5) in, described in be back to anoxic pond and Aerobic Pond return sludge ratio can be 50%~150%.
In step 6) in, the surface loading of described final deposition pool can be 0.6~1.0m3/m2H, hydraulic detention time can be 2.0~3.0h。
The present invention utilizes acidification reaction that the organic matter of the difficult for biological degradation in slurry, dyestuff and the alkali decrement waste water of part waste water is analysedGo out, reduce the COD of waste water by the suction-operated of fresh residual active sludge and materialized mud. Part mud and return of waste waterReduce the water temperature of waste water to regulating reservoir, make regulating reservoir there is the partial function of hydrolysis acidification pool, increase the hydrolysis acidification time of staying.Mud can reduce sludge yield through anaerobic digestion, promotes to be degraded by the hardly degraded organic substance of sludge absorption, reduces waste water hydraulic retentionTime.
Brief description of the drawings
Fig. 1 is the process chart of the embodiment of the present invention.
Detailed description of the invention
The present invention is further illustrated in connection with accompanying drawing for following examples.
Referring to Fig. 1, the embodiment of the present invention comprises the following steps:
1) dyeing waste water is collected in wastewater collection pond; The hydraulic detention time in described wastewater collection pond is 0.5~1h.
2) dyeing waste water in wastewater collection pond is divided into three parts:
The dyeing waste water of Part I pumps in acidification reaction pond, regulates pH value to 2.0~4.5 of dyeing waste water in acidification reaction pond;
The dyeing waste water of Part II pumps in neutralization reaction pond and mixes with the water outlet of acidification reaction pond, adjusts dyeing waste water pH value extremely6.0~8.5;
The dyeing waste water of Part III is introduced regulating reservoir for regulating the dyeing waste water pH value of regulating reservoir;
In described adjusting acidification reaction pond, pH value to 2.0~4.5 of dyeing waste water, can add the tune such as sulfuric acid, hydrochloric acid or ferrous sulfateJoint pH value to 2.0~4.5; The hydraulic detention time in described acidification reaction pond, neutralization reaction pond can be 0.5~1h.
3) the waste water gravity flow in neutralization reaction pond is entered to a heavy pond, the waste water gravity flow after a heavy pond precipitation enters regulating reservoir,Regulating reservoir is provided with overfall;
When regulating reservoir pH is lower than 6.5 time, the part dyeing waste water in wastewater collection pond is pumped into regulating reservoir, make regulating reservoir waste waterPH is greater than 6.5;
By the part sludge reflux in a heavy pond, to acidification reaction pond, part sludge reflux is to neutralization reaction pond;
The described acidification reaction pond that is back to can be 25%~50% with the return sludge ratio that is back to neutralization reaction pond; The table in one heavy pondFace load can be 1.0~2.5m3/m2H, the hydraulic detention time in acidification reaction pond and neutralization reaction pond can be 2.0~3.0h; AdjustThe hydraulic detention time in joint pond can be 6~12h, and the water level of regulating reservoir can be 50%~90% of regulating reservoir total height, regulating reservoirWater temperature can be 30~38 DEG C.
4) waste water in regulating reservoir is pumped into hydrolysis acidification pool, then gravity flow enters intermediate pool, anoxic pond, Aerobic Pond, two successivelyHeavy pond;
The part return of waste water of described intermediate pool is to regulating reservoir, for regulating water temperature or the water level of regulating reservoir;
The hydraulic detention time of described hydrolysis acidification pool can be 6~12h;
The hydraulic detention time of described intermediate pool can be 0.5~1.0h;
The hydraulic detention time of described anoxic pond can be 5.0~10.0h;
The hydraulic detention time of described Aerobic Pond can be 15.0~30.0h;
Surface loading 1.0~the 2.5m of described second pond3/m2H, hydraulic detention time 2.0~3.0h.
5) by step 4) in the part sludge reflux of second pond to regulating reservoir, part sludge reflux is to anoxic pond and Aerobic Pond, twoThe excess sludge in heavy pond pumps into neutralization reaction pond; The described return sludge ratio that is back to anoxic pond and Aerobic Pond can be 50%~ 150%。
6) the waste water gravity flow of second pond is entered to transition pond, coagulating basin, after coagulating, waste water gravity flow enters final deposition pool, final deposition poolSludge reflux to neutralization reaction pond, the discharge of wastewater of final deposition pool; Transition pond return of waste water to regulating reservoir for regulating regulating reservoirWater temperature or water level; The surface loading of described final deposition pool can be 0.6~1.0m3/m2H, hydraulic detention time can be 2.0~3.0h.
7) by step 3) in a heavy pond mud be collected in sludge concentration tank, or directly press filtration, or pump in sludge digestion tankPress filtration after digestion, digester water outlet enters in regulating reservoir.
Taking the cotton dyeing waste water of mixed collection as example, regulating reservoir CODcr is 1800~3300mg/L, colourity 1600~6400Doubly, pH10~12. 50% acidification reaction pH is adjusted to 2.5, PVA slurry and part dyestuff is separated out, through neutralization reaction, and biochemistryMud and the reaction of materialized mud recirculate mixing precipitate and separate, regulating reservoir waste water COD cr reduces to 1200~2000mg/L.
Materialized mud and residue biochemical sludge are back to neutralization reaction pond by the present invention, reinforcement sludge to the slurry in dyeing waste water andThe absorption of dyestuff separation. The multistage regulating reservoir that is back to of waste water, the water temperature of control and regulation waste water is 30~38 DEG C, biochemical sludge portionDivide and be back to regulating reservoir, keep regulating reservoir water level 50%~90%, make regulating reservoir possess the partial function of hydrolysis acidification. Materialization dirtMud, biochemical sludge and the slurry of separating out and dyestuff pump into anaerobic digester, and the time of staying 12~36h consumes the water outlet waste water in pondCollecting pit. The regular press filtration of digester mud, pressure filtration yielding water enters wastewater collection pond, mud cake storage. In printing-dyeing waste water treatment processVarious mud be all back to a heavy pond, unifiedly flow into sludge concentration tank by a heavy pond.

Claims (10)

1. a printing-dyeing waste water treatment process for circulation in muddy water strengthening, is characterized in that comprising the following steps:
1) dyeing waste water is collected in wastewater collection pond;
2) dyeing waste water in wastewater collection pond is divided into three parts:
The dyeing waste water of Part I pumps in acidification reaction pond, regulates pH value to 2.0~4.5 of dyeing waste water in acidification reaction pond;
The dyeing waste water of Part II pumps in neutralization reaction pond and mixes with the water outlet of acidification reaction pond, adjusts dyeing waste water pH value extremely6.0~8.5;
The dyeing waste water of Part III is introduced regulating reservoir for regulating the dyeing waste water pH value of regulating reservoir;
3) the waste water gravity flow in neutralization reaction pond is entered to a heavy pond, the waste water gravity flow after a heavy pond precipitation enters regulating reservoir,Regulating reservoir is provided with overfall;
When regulating reservoir pH is lower than 6.5 time, the part dyeing waste water in wastewater collection pond is pumped into regulating reservoir, make regulating reservoir waste waterPH is greater than 6.5;
By the part sludge reflux in a heavy pond, to acidification reaction pond, part sludge reflux is to neutralization reaction pond;
4) waste water in regulating reservoir is pumped into hydrolysis acidification pool, then gravity flow enters intermediate pool, anoxic pond, Aerobic Pond, two successivelyHeavy pond;
5) by step 4) in the part sludge reflux of second pond to regulating reservoir, part sludge reflux is to anoxic pond and Aerobic Pond, twoThe excess sludge in heavy pond pumps into neutralization reaction pond;
6) enter coagulating basin after the waste water gravity flow of second pond is entered to transition pond, after coagulating, waste water gravity flow enters final deposition pool again,The sludge reflux of final deposition pool is to neutralization reaction pond, the discharge of wastewater of final deposition pool; Transition pond return of waste water to regulating reservoir is used for regulating tuneWater temperature or the water level in joint pond;
7) by step 3) in a heavy pond mud be collected in sludge concentration tank, or directly press filtration, or pump in sludge digestion tankPress filtration after digestion, digester water outlet enters in regulating reservoir.
2. the printing-dyeing waste water treatment process that a kind of muddy water circulates in strengthening as claimed in claim 1, is characterized in that in step 1)In, the hydraulic detention time in described wastewater collection pond is 0.5~1h.
3. the printing-dyeing waste water treatment process that a kind of muddy water circulates in strengthening as claimed in claim 1, is characterized in that in step 2)In, in described adjusting acidification reaction pond pH value to 2.0~4.5 of dyeing waste water, are to add sulfuric acid, hydrochloric acid or ferrous sulfate to regulatePH value to 2.0~4.5.
4. the printing-dyeing waste water treatment process that a kind of muddy water circulates in strengthening as claimed in claim 1, is characterized in that in step 2)In, the hydraulic detention time in described acidification reaction pond and neutralization reaction pond is 0.5~1h.
5. the printing-dyeing waste water treatment process that a kind of muddy water circulates in strengthening as claimed in claim 1, is characterized in that in step 3)In, described in the return sludge ratio that is back to acidification reaction pond and is back to neutralization reaction pond be 25%~50%.
6. the printing-dyeing waste water treatment process that a kind of muddy water circulates in strengthening as claimed in claim 1, is characterized in that in step 3)In, the surface loading in a heavy pond is 1.0~2.5m3/m2H, the hydraulic detention time in acidification reaction pond and neutralization reaction pond is 2.0~3.0h; The hydraulic detention time of regulating reservoir is 6~12h, and the water level of regulating reservoir is 50%~90% of regulating reservoir total height, adjustsThe water temperature in joint pond is 30~38 DEG C.
7. the printing-dyeing waste water treatment process that a kind of muddy water circulates in strengthening as claimed in claim 1, is characterized in that in step 4)In, the part return of waste water of described intermediate pool is to regulating reservoir, for regulating water temperature or the water level of regulating reservoir.
8. the printing-dyeing waste water treatment process that a kind of muddy water circulates in strengthening as claimed in claim 1, is characterized in that in step 4)In, the hydraulic detention time of described hydrolysis acidification pool is 6~12h;
The hydraulic detention time of described intermediate pool is 0.5~1.0h;
The hydraulic detention time of described anoxic pond is 5.0~10.0h;
The hydraulic detention time of described Aerobic Pond is 15.0~30.0h;
The surface loading of described second pond is 1.0~2.5m3/m2H, hydraulic detention time is 2.0~3.0h.
9. the printing-dyeing waste water treatment process that a kind of muddy water circulates in strengthening as claimed in claim 1, is characterized in that in step 5)In, described in be back to anoxic pond and Aerobic Pond return sludge ratio be 50%~150%.
10. the printing-dyeing waste water treatment process that a kind of muddy water circulates in strengthening as claimed in claim 1, is characterized in that in step 6)In, the surface loading of described final deposition pool is 0.6~1.0m3/m2H, hydraulic detention time is 2.0~3.0h.
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CN110668639A (en) * 2019-09-30 2020-01-10 华东理工大学 Treatment method for zero discharge of wastewater in polyformaldehyde production

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