CN110395856A - A kind of processing method of electrophoretic-coating wastewater - Google Patents

A kind of processing method of electrophoretic-coating wastewater Download PDF

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Publication number
CN110395856A
CN110395856A CN201910830373.4A CN201910830373A CN110395856A CN 110395856 A CN110395856 A CN 110395856A CN 201910830373 A CN201910830373 A CN 201910830373A CN 110395856 A CN110395856 A CN 110395856A
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water
enters
sewage
tank
sludge
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赵亮
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Hebei Yuejing Environmental Protection Technology Co Ltd
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Hebei Yuejing Environmental Protection Technology Co Ltd
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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
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • 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
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46176—Galvanic cells
    • 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
    • C02F1/5281—Installations for water purification using chemical agents
    • 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
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • 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
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/62—Heavy metal compounds
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • 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
    • C02F2103/14—Paint wastes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • 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
    • 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
    • C02F3/308—Biological phosphorus removal

Abstract

The invention discloses a kind of processing methods of electrophoretic-coating wastewater, it is related to sewage treatment field, comprising the following steps: quaternization, grid intercept suspended matter, light electrolysis, air bearing pretreatment, PH readjustment, mud-water separation, biochemical treatment, active carbon filter filtering and qualified discharge；Technique of the invention is more scientific and reasonable, the biodegradability of waste water can be improved in this technique, raw water is pre-processed using light electrolysis and air bearing, enter biochemical system, using discharging after advanced treating, influent COD 1200 afterwards, COD is 300 after the floating pretreatment of light electrolysis aerating, removal rate is up to 75%, then final outflow water water quality is limpid after biochemical treatment, reaches country-level A emission request.

Description

A kind of processing method of electrophoretic-coating wastewater
Technical field
The present invention relates to technical field of sewage, specially a kind of processing method of electrophoretic-coating wastewater.
Background technique
The processing method of electrophoretic-coating wastewater still based on biochemical treatment, but due in such waste water containing more Noxious material, if biggish impact will be caused to biochemical part without pretreatment, at present both at home and abroad for the pre- of electrophoresis waste water Processing mainly has coagulation, air bearing, light electrolysis, electric flocculation and reverse osmosis etc.；Macromolecular organic contamination may be implemented in micro electrolysis tech The chain rupture of object improves the biodegradability of waste water, is widely used in the pretreatment of dyeing waste water, pharmacy waste water and wastewater from chemical industry etc. In；The biochemical of electrophoretic-coating wastewater is poor, needs early period to pre-process, conventional pretreatment such as coagulation, electric flocculation, reverse osmosis equal scarce Point is very big, is not that sludge quantity is big, is exactly that equipment needs cleaning repeatedly that can just reuse, otherwise effect discount significantly is such as electric Flocculation, reverse osmosis to need membranous system, at high cost, the defects of running time is short, and the service life of film is short.
Summary of the invention
The purpose of the present invention is to provide the processing methods of electrophoretic-coating wastewater, to solve the problems, such as that background technique proposes.
To achieve the above object, the invention provides the following technical scheme: a kind of processing method of electrophoretic-coating wastewater, including Following steps:
S1: the reaction settling basin of Devices in Workshop intermitten service is added in electrophoretic-coating wastewater, and setting automatic alkali adding device is a set of, fixed When lye is added in electrophoresis waste water, to after being reacted when discharging electrophoresis waste water precipitation and separation provide reaction condition, on Clear liquid discharging enters workshop drainage ditch, and into Sewage Disposal, solid waste can be temporarily stored into solid waste slot, at regular outward transport It sets；
S2: the industrial wastewater into Sewage Disposal enters grid canal through sewage conduct first, by grid, retains in pipe network Bulky grain suspended matter, then gravity flow enters conditioning tank, is promoted by elevator pump into coagulation floatation, and most of in waste water suspends Object, oils and particulate matter are removed in flotation tank；
S3: flotation tank water outlet gravity flow, which enters, promotes pump sump, is lifted into Fe-C micro electrolysis pond, needs promoted in pond before light electrolysis Acid solution is added, pH value is adjusted between 3-5, so as to light electrolysis normal operation, surfactant refractory organic compounds are through micro- Electrolysis, a part are removed, and another part can be converted into easily biological-degradable substance；
S4: then sewage enters PH readjustment pond, adds lye in pond, pH value is transferred to 9-11 or so, convenient for substances such as zinc ions Removal, while the feeding lime in flocculation tank adds simultaneously using the chemical reaction precipitation method for removing phosphate Flocculant and flocculation aid, to help wadding body to be formed and precipitation and separation, sewage after the reaction abundant muddy water in inclined-tube sedimentation tank divides From；Then enter collecting-tank and sanitary sewage is mixed together, it is continuous into subsequent processing work；
S5: sanitary sewage mixing industrial wastewater after pretreatment, pump are lifted into biochemistry pool, main biochemistry pool by anaerobic reation pool, Contact-oxidation pool and sedimentation basin three parts composition, COD and major pollutants are degraded in this section, and the organic matter in waste water is being detested It is degraded in oxygen reactor by anaerobic bacterial digestion, reduces the organic loading of method for subsequent processing；Waste water enters contact-oxidation pool, connects Microorganism in touching oxidation pond on filler is degraded and is removed to the Organic pollutant in sewage, and then plays purification sewage Effect；Contact-oxidation pool water outlet enters sedimentation basin, and the biomembrane to fall off from filler carries out precipitating removal in sedimentation basin；Together When, biochemistry pool mixed liquor and precipitating sludge are respectively provided with mixed liquor and flow back with sludge reflux to guarantee sludge quantity in biochemistry pool, Also function to the effect of biological carbon and phosphorous removal.
S6: sedimentation basin water outlet enters intermediate pool, enters quartz sand filter tank through water pump lifting, filter tank is gone again in water removal Organic pollutant and suspended matter, filter tank water outlet enter active carbon filter, the dissolved organic matter not removed can be in active carbon Suction-operated under remove, the waste water after filtering through active carbon filter enters clear water reserviors, water outlet realize can reuse, row up to standard It puts.
Waste water COD index is 1200mg/L in the S1-S3, the waste water COD of qualified discharge after treatment in the S6 Index is 50mg/L.
The sludge that the sedimentation basin precipitation and separation in the inclined-tube sedimentation tank and S5 in flotation tank, S4 in the S2 comes out, It is uniformly stored in sludge storage pool, through carrying out filters pressing processing, dewatered sludge by sludge plate-frame filter press in sludge concentration tank After 80%, outward transport is disposed moisture content.
Lye in the S1 and S3 is granular or sheet.
Compared with prior art, the beneficial effects of the present invention are: technique of the invention is more scientific and reasonable, this technique can The biodegradability for improving waste water pre-processes raw water using light electrolysis and air bearing, enters biochemical system afterwards, after advanced treating Discharge, 1200 mg/L of influent COD, COD is 50 mg/L after the floating pretreatment of light electrolysis aerating, and removal rate is up to 95%, water outlet Water quality is limpid, reaches country-level A emission request.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described, Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the scope of protection of the invention.
Embodiment:
S1: the reaction settling basin of Devices in Workshop intermitten service is added in electrophoretic-coating wastewater, and setting automatic alkali adding device is a set of, fixed When electrophoresis waste water in lye is added, to precipitation and separation after can reacting when discharging electrophoresis waste water, supernatant is discharged into vehicle Between drainage ditch, into Sewage Disposal, solid waste can be temporarily stored into solid waste slot, periodically outward transport disposition；
S2: the industrial wastewater into Sewage Disposal enters grid canal through sewage conduct first, by grid, retains in pipe network Bulky grain suspended matter, then gravity flow enters conditioning tank, is promoted by elevator pump into coagulation floatation, and most of in waste water suspends Object, oils and particulate matter are removed in flotation tank；
S3: flotation tank water outlet gravity flow, which enters, promotes pump sump, is lifted into Fe-C micro electrolysis pond, needs promoted in pond before light electrolysis Acid solution is added, pH value is adjusted to 4, so as to light electrolysis normal operation, hard-degraded substance is acted on through light electrolysis, and a part is gone It removes, another part can be converted into easily biological-degradable substance；
S4: then sewage enters PH readjustment pond, adds lye in pond, pH value is transferred to 10, convenient for the removal of zinc ion, while Feeding lime in flocculation tank, using chemical precipitation method for removing total phosphorus, the sewage after reaction is in inclined-tube sedimentation tank Abundant mud-water separation；Then enter collecting-tank and sanitary sewage is mixed together, it is continuous into subsequent processing work；
S5: sanitary sewage mixing industrial wastewater after pretreatment, pump are lifted into biochemistry pool, main biochemistry pool by anaerobic reation pool, Contact-oxidation pool and sedimentation basin three parts composition, COD and major pollutants are degraded in this section, and the organic matter in waste water is being detested It is degraded in oxygen reactor by anaerobic bacterial digestion, reduces the organic loading of method for subsequent processing；Waste water enters contact-oxidation pool, connects Microorganism in touching oxidation pond on filler is degraded and is removed to the Organic pollutant in sewage, and then plays purification sewage Effect；Contact-oxidation pool water outlet enters sedimentation basin, and the biomembrane to fall off from filler carries out precipitating removal in sedimentation basin；
S6: sedimentation basin water outlet enters intermediate pool, enters quartz sand filter tank through water pump lifting, having in water removal is gone in filter tank again Machine pollutant and suspended matter, filter tank water outlet enter active carbon filter, and the dissolved organic matter not removed can be in the suction of active carbon Removed under attached effect, the waste water after filtering through active carbon filter enters clear water reserviors, water outlet realize can reuse, qualified discharge.
Waste water COD index is 1200 mg/L in S1-S3, and the waste water COD index of qualified discharge is 50 after treatment in S6 mg/L。
The sludge that the sedimentation basin precipitation and separation in the inclined-tube sedimentation tank and S5 in flotation tank, S4 in S2 comes out is unified It is stored in sludge storage pool, through carrying out filters pressing processing by sludge plate-frame filter press, dewatered sludge is aqueous in sludge concentration tank After 80%, outward transport is disposed rate.
Lye in S1 and S3 is granular.
Technique of the invention is more scientific and reasonable, and the biodegradability of waste water can be improved in this technique, gentle using light electrolysis Floating pretreatment raw water, enters biochemical system afterwards, using being discharged after advanced treating, 1200 mg/L of influent COD, by light electrolysis COD is 50 mg/L after the floating pretreatment of aerating, and removal rate is up to 95%, and effluent quality is limpid, reaches country-level A emission request.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is defined by the appended.

Claims (4)

1. a kind of processing method of electrophoretic-coating wastewater, which comprises the following steps:
S1: the reaction settling basin of Devices in Workshop intermitten service is added in electrophoretic-coating wastewater, and setting automatic alkali adding device is a set of, fixed When lye is added in electrophoresis waste water, to after being reacted when discharging electrophoresis waste water precipitation and separation provide reaction condition, on Clear liquid discharging enters workshop drainage ditch, and into Sewage Disposal, solid waste can be temporarily stored into solid waste slot, at regular outward transport It sets；
S2: the industrial wastewater into Sewage Disposal enters grid canal through sewage conduct first, by grid, retains in pipe network Bulky grain suspended matter, then gravity flow enters conditioning tank, is promoted by elevator pump into coagulation floatation, and most of in waste water suspends Object, oils and particulate matter are removed in flotation tank；
S3: flotation tank water outlet gravity flow, which enters, promotes pump sump, is lifted into Fe-C micro electrolysis pond, needs promoted in pond before light electrolysis Acid solution is added, pH value is adjusted between 3-5, so as to light electrolysis normal operation, surfactant refractory organic compounds are through micro- Electrolysis, a part are removed, and another part can be converted into easily biological-degradable substance；
S4: then sewage enters PH readjustment pond, adds lye in pond, pH value is transferred to 9-11 or so, convenient for substances such as zinc ions Removal, while the feeding lime in flocculation tank adds simultaneously using the chemical reaction precipitation method for removing phosphate Flocculant and flocculation aid, to help wadding body to be formed and precipitation and separation, sewage after the reaction abundant muddy water in inclined-tube sedimentation tank divides From；Then enter collecting-tank and sanitary sewage is mixed together, it is continuous into subsequent processing work；
S5: sanitary sewage mixing industrial wastewater after pretreatment, pump are lifted into biochemistry pool, main biochemistry pool by anaerobic reation pool, Contact-oxidation pool and sedimentation basin three parts composition, COD and major pollutants are degraded in this section, and the organic matter in waste water is being detested It is degraded in oxygen reactor by anaerobic bacterial digestion, reduces the organic loading of method for subsequent processing；Waste water enters contact-oxidation pool, connects Microorganism in touching oxidation pond on filler is degraded and is removed to the Organic pollutant in sewage, and then plays purification sewage Effect；Contact-oxidation pool water outlet enters sedimentation basin, and the biomembrane to fall off from filler carries out precipitating removal in sedimentation basin；Together When, biochemistry pool mixed liquor and precipitating sludge are respectively provided with mixed liquor and flow back with sludge reflux to guarantee sludge quantity in biochemistry pool, Also function to the effect of biological carbon and phosphorous removal；
S6: sedimentation basin water outlet enters intermediate pool, enters quartz sand filter tank through water pump lifting, having in water removal is gone in filter tank again Machine pollutant and suspended matter, filter tank water outlet enter active carbon filter, and the dissolved organic matter not removed can be in the suction of active carbon Removed under attached effect, the waste water after filtering through active carbon filter enters clear water reserviors, water outlet realize can reuse, qualified discharge.
2. a kind of processing method of electrophoretic-coating wastewater according to claim 1, it is characterised in that: give up in the S1-S3 Water COD index is 1200mg/L, and the waste water COD index of qualified discharge is 50mg/L after treatment in the S6.
3. a kind of processing method of electrophoretic-coating wastewater according to claim 1, it is characterised in that: the air bearing in the S2 The sludge that the sedimentation basin precipitation and separation in inclined-tube sedimentation tank and S5 in pond, S4 comes out, is uniformly stored in sludge storage pool, passes through In sludge concentration tank, filters pressing processing is carried out by sludge plate-frame filter press, dewatered moisture percentage in sewage sludge is transported outside after 80% Row disposition.
4. a kind of processing method of electrophoretic-coating wastewater according to claim 1, it is characterised in that: in the S1 and S3 Lye is granular or sheet.
CN201910830373.4A 2019-09-04 2019-09-04 A kind of processing method of electrophoretic-coating wastewater Pending CN110395856A (en)

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Cited By (2)

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CN112408713A (en) * 2020-11-27 2021-02-26 湖南中拓环境工程有限公司 Method and system for recycling and treating electrophoresis wastewater
CN113087314A (en) * 2021-05-06 2021-07-09 广东新洁源环保工程有限公司 Wastewater treatment system and treatment process

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Application publication date: 20191101