CN104649521A - Printing and dyeing wastewater treatment process for intensifying internal circulation of sludge water - Google Patents
Printing and dyeing wastewater treatment process for intensifying internal circulation of sludge water Download PDFInfo
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- CN104649521A CN104649521A CN201510094247.9A CN201510094247A CN104649521A CN 104649521 A CN104649521 A CN 104649521A CN 201510094247 A CN201510094247 A CN 201510094247A CN 104649521 A CN104649521 A CN 104649521A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to a printing and dyeing wastewater treatment process for intensifying the internal circulation of sludge water and relates to printing and dyeing wastewater treatment and sludge recycling. According to the printing and dyeing wastewater treatment process, printing and dyeing wastewater is collected into a wastewater collection tank, the printing and dyeing wastewater is divided into three parts which are respectively pumped into an acidifying reaction tank, a neutralization reaction tank and a regulation tank, the wastewater inside the neutralization reaction tank automatically flows into a sedimentation tank, sediment wastewater automatically flows into the regulation tank, and a part of the wastewater is pumped into the regulation tank when the pH of the regulation tank is lower than 6.5 so that the pH of the wastewater inside the regulation tank is higher than 6.5; a part of sludge inside the regulation tank returns into the acidifying reaction tank and the neutralization reaction tank; the wastewater inside the regulation tank is pumped into a hydrolysis acidification tank and then automatically flows into an intermediate tank, an anoxic tank, an aerobic tank and a secondary sedimentation tank sequentially; a part of sludge inside the secondary sedimentation tank returns into the regulation tank, the anoxic tank, the aerobic tank and the neutralization reaction tank; the wastewater inside the secondary sedimentation tank automatically flows into a transition tank and a coagulation tank, the wastewater automatically flows into a final sedimentation tank after coagulation reaction, the sludge inside the final sedimentation tank returns to the neutralization reaction tank, and the wastewater inside the final sedimentation tank is discharged; the sludge inside the sedimentation tank is concentrated or directly subjected to pressure filtration or subjected to the pressure filtration after being digested by being pumped into a sludge digestion tank, and effluent water of the sludge digestion tank is discharged into the regulation tank.
Description
Technical field
The present invention relates to treatment of dyeing wastewater and sludge circulation utilization, especially relate to the printing-dyeing waste water treatment process of a kind of muddy water strengthening internal recycle.
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 spinning refining wastewater, silk reeling wastewater, numb dyeing waste water, chemical fibre dyeing waste water, wax-dyeing process waste water etc.Polyvinyl alcohol (PVA) slurry in common dyeing waste water and the B/C of dyestuff little, biodegradability is poor, affect COD and the colourity qualified discharge of waste water, auxiliary agent, tensio-active agent, temperature, colourity, basicity etc. affect microorganism active and wastewater regenerating and recycling.
Dyeing water treatment method is common is Aerobic biological process, preposition anaerobism, acidication, materialization coagulation etc. one or several combination as pre-treatment, to increase the B/C ratio of waste water.When Aerobic biological process cannot satisfy regulatory require time, advanced treatment need be increased as biological filter, 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 dual treatment technique.Composite waste treatment process comprises grid-pH adjustment-equalizing tank-acidication-Aerobic biological process-materializing strategy; Waste water dual treatment technique comprise the high-concentration waste water such as kiering, destarch after anaerobism or acidication again with other waste water combination treatment, the waste lye of Alkali reduction after alkali collection recycling again with other waste water combination treatment.
Printing and dyeing enterprise is the market requirement adapting to short run multi items, cause the kind of dyes of dyeing waste-water and fluctuation of concentration larger, the production management of waste water decoloring technique is made to become complicated, lack and automatically control and automatic early-warning, the production management of waste water treatment is difficult to take corresponding decoloring method according to colourity variation.The kind of dyes that the waste water of the concentrated waste water treatment facility receiving of printing and dyeing industry garden or printing and dyeing production base comprises is more more complete, and the more difficult random fluctuation of decoloration process is to tackle various dyestuff.Use the discoloring agent of broad-spectrum high efficacy to make decolorizing printing and dyeing waste water relatively easy, make to adopt different discoloring agent relative simplicity according to different dyes in waste water production management process.
Slurry is polyvinyl alcohol (PVA) mainly, biodegradability is poor, source uses biodegradable green slurry can reduce PVA usage quantity, or use various technology to reclaim PVA slurry, or extend slurry residence time in end treatment process or adopt high efficiency reactor to increase the means promotion slurry biological degradations such as sludge concentration.PVA slurry advantage is a lot, is difficult to eliminate or replace completely, and recovery technology is still unstable; The anaerobism of end treatment, acidication are the effective ways of the B/C ratio increasing PVA slurry, but this technique is easily by the impact of the sulfate radical reduction in waste water, and dyestuff is easily reduced to amine substance, with the increase of the PVA polymerization degree, need the residence time increasing 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, water-insoluble dye such as dispersed dye, vat dyes, thioxine dyes etc. are suspension or colloid in waste water, be easy to be decoloured by inorganic coagulant, water-soluble dye such as reactive dyestuffs and cationic dyestuff are then not easily decoloured by inorganic coagulant.Anaerobic hydrolysis, charcoal absorption, chemical oxidation are effectively poor to water-insoluble dye effect to water-soluble dye.Aerobic activated sludge is to dye decolored many absorption owing to active sludge.But the ozone oxidation in chemical oxidation is that the better method cost of decolouring is higher, Fenton reagent effect is better but sludge quantity is large, and clorox is that lower-cost discoloring agent can cause and accelerates azo bond cracking but easily produce carcinogenic aniline and other toxic substances.
Chinese patent CN1240624 discloses a kind of bioremediation of the dyeing waste water containing aniline, and employing anaerobic baffled reactor (ABR) and sequence criticize the treatment process that sequencing batch reactor activated sludge reaction device (SBR) combines.The open one of Chinese patent CN100361910, with four step printing-dyeing waste water treatment process of anaerobism-anoxic-aerobic-coagulating sedimentation, utilizes anaerobic treatment as the efficient linking transition of anaerobic and aerobic, improves the biodegradability energy of anaerobic effluent.Chinese patent CN101638286B discloses a kind of sewage water treatment method containing dyeing waste water, water distribution is carried out via distributing well through pretreated sewage, part sewage enters one section of aeration tank and carries out Aerobic biological process, and another part sewage enters anaerobic fixed film reactor and is hydrolyzed.Chinese patent CN100404440 discloses a kind of chemical fiber printing alkali reducing quantity waste water resources pretreatment method, pH value to 2.5 ~ 5.0 of waste water are first regulated with acid, flocculation agent is added again in waste water, carry out solid-liquid separation after sufficiently mixing, thus by 75 ~ 90%COD cr contaminants removal in waste water, improve wastewater biodegradability.Chinese patent CN101456649B discloses a kind of method of dyeing waste water high-efficiency biological strengthening treatment, by through pretreated dyeing waste water with from stream mode or the oxygen-starved area being entered 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 adsorbs in advance with flyash after grid, can drop into suitable additive in adsorption process; After going out water filtration, adjust ph enters further desolventing technology in bubble tower; Then enter after hydrolysis acidification pool carries out anaerobic treatment, enter the further biochemical treatment of BAF, carry out bio-oxidation and retain suspended solids; After eventually passing cartridge filter and ion exchange tower advanced treatment.Chinese patent CN103274524B discloses a kind of dyeing waste water pretreatment process based on anoxic zone phase separation technology, anaerobism section is divided into I phase and II phase, namely fermentation and hydrogen production produces acid phase and methanogenic phase, the organism in waste water is utilized to provide electron donor, utilize the reducing power of sulfate-reducing process and its reduzate sulfide, realize effective decolouring of dyestuff in I phase, improve wastewater biodegradability, and realize organic efficient removal in II phase.Chinese patent CN101955282B discloses the method for a kind of printing and dyeing enterprise height saliferous dyeing waste-water zero release, first waste water enter equalizing tank homogeneous, then reaction tank is entered, add ferrous sulfate adjust ph in reaction tank and coagulating occurs, after reaction, water outlet enters settling tank precipitation, and settling tank supernatant liquor, through electrochemical reactor process, then enters second-level settling pond and scums and sediment, enter aeration tank aeration again, by manganese sand filter iron removal by filtration after aeration; Water outlet after filtration is first by ultrafiltration membrane treatment, and the dense water of ultra-filtration membrane gets back to equalizing tank, and fresh water enters nanofiltration membrane treatment; Nanofiltration membrane output fresh water enters reverse osmosis membrane, and output concentrate recirculation is to equalizing tank or direct evaporation process; The dense water of reverse osmosis membrane enters electrodialyzer, and the backflow of electrodialysis fresh water is as reverse osmosis membrane water inlet, and the dense water of electrodialysis enters vaporizer and evaporates; The steam that evaporation produces can be back to printing and dyeing and produce, and the residue that evaporation produces is as disposition of solid waste; Not discharge water pollutent in whole process.
Chinese patent CN103359897B discloses a kind of technique and the device that process high concentration sulphate textile printing and dyeing wastewater, high concentration sulphate textile printing and dyeing wastewater is added pH adjusting agent and carries out neutralization reaction, reacted waste water through sedimentation regulate laggard enter micro cell, with Fe/C electrolysis, macromole toxic substance is become low toxicity or non-toxic substance.Chinese patent CN103058455B openly utilizes the system of activated coke treatment of dyeing and printing, comprise connect setting successively hydrolysis acidification device, activated sludge tank, settling tank and biological filter; In described hydrolysis acidification device, be added with activated coke, from described hydrolysis acidification device out enter described activated sludge tank again containing the water outlet of activated coke.Chinese patent CN103435217B discloses a kind for the treatment of process of sulfuration dyeing waste water, adopts the integrated conduct method of preaeration catalyzed oxidation, materialization desulfurization, UV-Fenton catalyzed oxidation, acidication, catalytic oxidation, makes waste water reach first discharge standard.Chinese patent CN103359878B discloses a kind for the treatment of process realizing dyeing waste water zero release.This treatment process comprises the steps: to carry out materialization and biochemical treatment to dyeing waste water stoste; Water outlet is carried out sand filtration, ultrafiltration and security personnel and is filtered even depth process, and the film processing system then sending into nanofiltration or reverse osmosis carries out film process; Fresh water and dense water is obtained through film process; Fresh water is low COD soft deionized water, adds water, general washing or recirculated cooling water as process water direct reuse in dyeing process, boiler; Dense water is the waste water containing organic pollutant of high salinity high rigidity, through the process of Fenton oxidation coupling lime-soda process, is the water outlet of low COD soft high salinity, by the processing requirement of dyeing, is back to dyeing process after directly adding salt after process.Chinese patent CN102897936B discloses a kind for the treatment of process and device thereof of dye-printing desizing waste water, be by pre-treatment after the leading adjusted to ph of desized wastewater, then the starch mud in amylolysis material water solution desized wastewater is utilized, to reduce stickiness and the ionic concn of desized wastewater, finally again thin film separation program is imposed to the desized wastewater after hydrolyzed starch mud, and then make desized wastewater reach the effect of solid-liquid separation, to obtain recycle-water, by this, with effectively delay follow-up carry out solid-liquid separation time, the incrustation blocking of filter membrane and the generation of filter cake, relative that the film life cycle life-span is extended.Chinese patent CN102936084B relates to a kind of printing-dyeing waste water treatment process of zero sludge discharge, this technique desized wastewater water outlet and aerobic nitrification liquid after the process of IC anaerobic pond is entered jointly interval anoxic pond, make denitrification, sulphur oxidation, sludge absorption propagation and mud dense place occur in anoxic pond simultaneously, reclaim the nitre state oxygen in aerobic nitrification liquid, reduce the sulfonium ion concentration entering Aerobic Pond, suspended particle in the water outlet of IC anaerobic pond is adsorbed, and clarification and effluent enters oxidation pond.Aerobic excess sludge enters CSTR pond digestion decrement after playing adsorption, and final excess sludge, after pressure filter process, pumps into fluidizing furnace by ram pump and completes sludge incineration.This technique significantly improves the settling property of settled sludge, improves the clearance of COD, achieves the zero release of excess sludge, and produces without obnoxious flavour, environmental protection more, efficient, and process operability is strong, and one-time investment is low, and treatment effect is obvious.Chinese patent CN101948220B discloses a kind for the treatment of method of printing and dying wastewater.First dyeing waste water is introduced pulse anaerobic reactor and carry out anaerobic treatment, anaerobic treatment water outlet enters biological contact oxidation pond, the water outlet gravity flow of biological contact oxidation pond enters second pond and carries out solid-liquid separation, secondary clarifier effluent penetration depth treatment system carries out that advanced treatment finally obtains can the middle water of reuse, and described advanced treatment system comprises Carbon fibe ionic membrane treatment unit, coagulative precipitation tank, manganese sand filter, accurate filter, ion exchange tower.The waste water treatment process of the present invention to existing maturation re-starts optimum combination.
Chinese patent CN101830579B discloses a kind of Methods of Color Removal of Dyestuff Effluent and system.The method is by a part of adjust pH of dyeing waste water to acidity, then obtains destainer through Inner electrolysis process; Then gained destainer is mixed with residue dyeing waste water in the basic conditions as discoloring agent, just can reach the object of decolouring and removal part COD.Chinese patent CN103121737B discloses a kind of method of electrochemical treatment dyeing waste water.Chinese patent CN103183451B discloses a kind for the treatment of method of printing and dying wastewater utilizing compound biological enzyme.The retrieving arrangement of PVA and method thereof in Chinese patent CN102992525B desized wastewater.
Summary of the invention
A kind of muddy water is the object of the present invention is to provide to strengthen the printing-dyeing waste water treatment process of internal recycle.
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 first part 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 second section pumps in neutralization reaction pond and mixes with the water outlet of acidification reaction pond, adjustment dyeing waste water pH value to 6.0 ~ 8.5;
The dyeing waste water of Part III introduces equalizing tank for regulating the dyeing waste water pH value in equalizing tank;
3) the waste water gravity flow in neutralization reaction pond is entered a heavy pond, the waste water gravity flow after a heavy pond precipitation enters equalizing tank, and equalizing tank is provided with overflow port;
When equalizing tank pH lower than 6.5 time, the part dyeing waste water in wastewater collection pond is pumped into equalizing tank, makes equalizing tank wastewater pH be greater than 6.5;
Partial sludge in one heavy pond is back to acidification reaction pond, and partial sludge is back to neutralization reaction pond;
4) waste water in equalizing tank is pumped into hydrolysis acidification pool, then gravity flow enters intermediate pool, anoxic pond, Aerobic Pond, second pond successively;
5) by step 4) in the partial sludge of second pond be back to equalizing tank, partial sludge is back to anoxic pond and Aerobic Pond, and the excess sludge of second pond pumps into neutralization reaction pond;
6) by the waste water of second pond gravity flow enter transition pond, coagulation basin, after coagulating waste water gravity flow enter final deposition pool, the sludge reflux of final deposition pool to neutralization reaction pond, the discharge of wastewater of final deposition pool; Transition pond return of waste water to equalizing tank for regulating water temperature or the water level of equalizing tank;
7) by step 3) in a heavy pond mud be collected in sludge thickener, or directly press filtration, or pump into press filtration after digestion in sludge digestion tank, digester water outlet enters in equalizing tank.
In step 1) in, the hydraulic detention time in described wastewater collection pond can be 0.5 ~ 1h.
In step 2) in, in described adjustment acidification reaction pond, pH value to 2.0 ~ 4.5 of dyeing waste water, can add adjust ph to 2.0 ~ 4.5 such as sulfuric acid, hydrochloric acid or ferrous sulfate; The hydraulic detention time in described acidification reaction pond, neutralization reaction pond can be 0.5 ~ 1h.
In step 3) in, described in be back to acidification reaction pond and the return sludge ratio that is back to neutralization reaction pond can be 25% ~ 50%; The surface load in one heavy pond can be 1.0 ~ 2.5m
3/ m
2h, the hydraulic detention time in acidification reaction pond and neutralization reaction pond can be 2.0 ~ 3.0h; The hydraulic detention time of equalizing tank can be 6 ~ 12h, and the water level of equalizing tank can be 50% ~ 90% of equalizing tank total height, and the water temperature of equalizing tank can be 30 ~ 38 DEG C.
In step 4) in, the effluent part of described intermediate pool is back to equalizing tank, for regulating water temperature in equalizing tank or water level;
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 load of described second pond can be 1.0 ~ 2.5m
3/ m
2h, 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 load of described final deposition pool can be 0.6 ~ 1.0m
3/ m
2h, hydraulic detention time can be 2.0 ~ 3.0h.
The present invention utilizes acidification reaction that the organism of the difficult for biological degradation in the slurry of effluent part, dyestuff and alkali decrement waste water is separated out, and the adsorption by fresh residual active sludge and materialized mud reduces the COD of waste water.Partial sludge and return of waste water reduce the water temperature of waste water to equalizing tank, make equalizing tank have the partial function of hydrolysis acidification pool, increase the acidication residence time.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 detention time.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of the embodiment of the present invention.
Embodiment
Following examples will the present invention is further illustrated by reference to the accompanying drawings.
See 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 first part 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 second section pumps in neutralization reaction pond and mixes with the water outlet of acidification reaction pond, adjustment dyeing waste water pH value to 6.0 ~ 8.5;
The dyeing waste water of Part III introduces equalizing tank for regulating the dyeing waste water pH value in equalizing tank;
In described adjustment acidification reaction pond, pH value to 2.0 ~ 4.5 of dyeing waste water, can add adjust ph to 2.0 ~ 4.5 such as sulfuric acid, hydrochloric acid or ferrous sulfate; 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 a heavy pond, the waste water gravity flow after a heavy pond precipitation enters equalizing tank, and equalizing tank is provided with overflow port;
When equalizing tank pH lower than 6.5 time, the part dyeing waste water in wastewater collection pond is pumped into equalizing tank, makes equalizing tank wastewater pH be greater than 6.5;
Partial sludge in one heavy pond is back to acidification reaction pond, and partial sludge is back to neutralization reaction pond;
The described acidification reaction pond that is back to can be 25% ~ 50% with the return sludge ratio being back to neutralization reaction pond; The surface load in one heavy pond can be 1.0 ~ 2.5m
3/ m
2h, the hydraulic detention time in acidification reaction pond and neutralization reaction pond can be 2.0 ~ 3.0h; The hydraulic detention time of equalizing tank can be 6 ~ 12h, and the water level of equalizing tank can be 50% ~ 90% of equalizing tank total height, and the water temperature of equalizing tank can be 30 ~ 38 DEG C.
4) waste water in equalizing tank is pumped into hydrolysis acidification pool, then gravity flow enters intermediate pool, anoxic pond, Aerobic Pond, second pond successively;
The effluent part of described intermediate pool is back to equalizing tank, for regulating water temperature in equalizing tank or water level;
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 load 1.0 ~ the 2.5m of described second pond
3/ m
2h, hydraulic detention time 2.0 ~ 3.0h.
5) by step 4) in the partial sludge of second pond be back to equalizing tank, partial sludge is back to anoxic pond and Aerobic Pond, and the excess sludge of second pond pumps into neutralization reaction pond; The described return sludge ratio being back to anoxic pond and Aerobic Pond can be 50% ~ 150%.
6) by the waste water of second pond gravity flow enter transition pond, coagulation basin, after coagulating waste water gravity flow enter final deposition pool, the sludge reflux of final deposition pool to neutralization reaction pond, the discharge of wastewater of final deposition pool; Transition pond return of waste water to equalizing tank for regulating water temperature or the water level of equalizing tank; The surface load of described final deposition pool can be 0.6 ~ 1.0m
3/ m
2h, hydraulic detention time can be 2.0 ~ 3.0h.
7) by step 3) in a heavy pond mud be collected in sludge thickener, or directly press filtration, or pump into press filtration after digestion in sludge digestion tank, digester water outlet enters in equalizing tank.
For the cotton dyeing waste water of mixed collection, equalizing tank CODcr is 1800 ~ 3300mg/L, colourity 1600 ~ 6400 times, pH10 ~ 12.50% acidification reaction pH is adjusted to 2.5, PVA slurry and some dyes is separated out, and through neutralization reaction, biochemical sludge and materialized mud recirculate mixing reaction also precipitate and separate, equalizing tank 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, and reinforcement sludge is to the absorption of the slurry in dyeing waste water and dyestuff and be separated.Waste water is multistage is back to equalizing tank, and the water temperature of regulating and controlling waste water is 30 ~ 38 DEG C, and biochemical sludge is partly refluxed to equalizing tank, keeps equalizing tank water level 50% ~ 90%, makes equalizing tank possess the partial function of acidication.Slurry and the dyestuff of materialized mud, biochemical sludge and precipitation pump into anaerobic digester, the residence time 12 ~ 36h, consume the water outlet wastewater collection pond in pond.The regular press filtration of digester mud, pressure filtration yielding water enters wastewater collection pond, and mud cake is stored.Various mud in printing-dyeing waste water treatment process are all back to a heavy pond, unified by a heavy pond inflow sludge thickener.
Claims (10)
1. a printing-dyeing waste water treatment process for muddy water strengthening internal recycle, 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 first part 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 second section pumps in neutralization reaction pond and mixes with the water outlet of acidification reaction pond, adjustment dyeing waste water pH value to 6.0 ~ 8.5;
The dyeing waste water of Part III introduces equalizing tank for regulating the dyeing waste water pH value in equalizing tank;
3) the waste water gravity flow in neutralization reaction pond is entered a heavy pond, the waste water gravity flow after a heavy pond precipitation enters equalizing tank, and equalizing tank is provided with overflow port;
When equalizing tank pH lower than 6.5 time, the part dyeing waste water in wastewater collection pond is pumped into equalizing tank, makes equalizing tank wastewater pH be greater than 6.5;
Partial sludge in one heavy pond is back to acidification reaction pond, and partial sludge is back to neutralization reaction pond;
4) waste water in equalizing tank is pumped into hydrolysis acidification pool, then gravity flow enters intermediate pool, anoxic pond, Aerobic Pond, second pond successively;
5) by step 4) in the partial sludge of second pond be back to equalizing tank, partial sludge is back to anoxic pond and Aerobic Pond, and the excess sludge of second pond pumps into neutralization reaction pond;
6) by the waste water of second pond gravity flow enter transition pond, coagulation basin, after coagulating waste water gravity flow enter final deposition pool, the sludge reflux of final deposition pool to neutralization reaction pond, the discharge of wastewater of final deposition pool; Transition pond return of waste water to equalizing tank for regulating water temperature or the water level of equalizing tank;
7) by step 3) in a heavy pond mud be collected in sludge thickener, or directly press filtration, or pump into press filtration after digestion in sludge digestion tank, digester water outlet enters in equalizing tank.
2. a kind of muddy water strengthens the printing-dyeing waste water treatment process of internal recycle as claimed in claim 1, it is characterized in that in step 1) in, the hydraulic detention time in described wastewater collection pond is 0.5 ~ 1h.
3. a kind of muddy water strengthens the printing-dyeing waste water treatment process of internal recycle as claimed in claim 1, it is characterized in that in step 2) in, pH value to 2.0 ~ 4.5 of dyeing waste water in described adjustment acidification reaction pond add sulfuric acid, hydrochloric acid or ferrous sulfate adjust ph to 2.0 ~ 4.5.
4. a kind of muddy water strengthens the printing-dyeing waste water treatment process of internal recycle as claimed in claim 1, it is characterized in that in step 2) in, the hydraulic detention time in described acidification reaction pond, neutralization reaction pond is 0.5 ~ 1h.
5. the printing-dyeing waste water treatment process of a kind of muddy water strengthening internal recycle 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. a kind of muddy water strengthens the printing-dyeing waste water treatment process of internal recycle as claimed in claim 1, it is characterized in that in step 3) in, the surface load in a heavy pond is 1.0 ~ 2.5m
3/ m
2h, the hydraulic detention time in acidification reaction pond and neutralization reaction pond can be 2.0 ~ 3.0h; The hydraulic detention time of equalizing tank can be 6 ~ 12h, and the water level of equalizing tank can be 50% ~ 90% of equalizing tank total height, and the water temperature of equalizing tank can be 30 ~ 38 DEG C.
7. the printing-dyeing waste water treatment process of a kind of muddy water strengthening internal recycle as claimed in claim 1, is characterized in that in step 4) in, the effluent part of described intermediate pool is back to equalizing tank, for regulating water temperature in equalizing tank or water level.
8. a kind of muddy water strengthens the printing-dyeing waste water treatment process of internal recycle as claimed in claim 1, it 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 load of described second pond is 1.0 ~ 2.5m
3/ m
2h, hydraulic detention time is 2.0 ~ 3.0h.
9. the printing-dyeing waste water treatment process of a kind of muddy water strengthening internal recycle 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. a kind of muddy water strengthens the printing-dyeing waste water treatment process of internal recycle as claimed in claim 1, it is characterized in that in step 6) in, the surface load of described final deposition pool is 0.6 ~ 1.0m
3/ m
2h, hydraulic detention time is 2.0 ~ 3.0h.
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| CN105110465A (en) * | 2015-09-10 | 2015-12-02 | 苏州旭达环保科技有限公司 | Three-phase anaerobic treatment system and method for printing and dyeing wastewater |
| CN106430810A (en) * | 2016-08-26 | 2017-02-22 | 长兴县夹浦污水处理有限公司 | Printing-dyeing textile wastewater and domestic wastewater mixed treatment system |
| CN108301489A (en) * | 2018-02-09 | 2018-07-20 | 刘诗军 | Pipeline system and control method thereof |
| CN109987800A (en) * | 2019-04-30 | 2019-07-09 | 江苏环保产业技术研究院股份公司 | A kind of device and its operation method of low energy consumption high-efficiency intensive treatment dyeing waste water |
| CN110143724A (en) * | 2019-05-30 | 2019-08-20 | 河北宁纺集团有限责任公司 | A kind of new process of highly concentrated dyeing and printing sewage processing |
| CN110668639A (en) * | 2019-09-30 | 2020-01-10 | 华东理工大学 | Treatment method for zero discharge of wastewater in polyformaldehyde production |
| CN113277688A (en) * | 2021-07-12 | 2021-08-20 | 湖州新利商标制带有限公司 | Device and method for efficient biological treatment and coupling sludge reduction of trademark fabric production wastewater |
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| CN110143724A (en) * | 2019-05-30 | 2019-08-20 | 河北宁纺集团有限责任公司 | A kind of new process of highly concentrated dyeing and printing sewage processing |
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| CN113277688A (en) * | 2021-07-12 | 2021-08-20 | 湖州新利商标制带有限公司 | Device and method for efficient biological treatment and coupling sludge reduction of trademark fabric production wastewater |
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