CN107522358A - Cell negative electrode material graphite production wastewater treatment method - Google Patents

Cell negative electrode material graphite production wastewater treatment method Download PDF

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Publication number
CN107522358A
CN107522358A CN201710797812.7A CN201710797812A CN107522358A CN 107522358 A CN107522358 A CN 107522358A CN 201710797812 A CN201710797812 A CN 201710797812A CN 107522358 A CN107522358 A CN 107522358A
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negative electrode
treatment
water
wastewater treatment
sent
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王杰
孙毅
杨正宏
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Henan Yicheng New Energy Co ltd
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Henan Yicheng New Energy Co ltd
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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
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/24Treatment of water, waste water, or sewage by flotation
    • 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
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/281Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • 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
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • 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
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • 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
    • C02F1/54Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56Macromolecular compounds
    • 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
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • 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

Abstract

The invention discloses a kind of cell negative electrode material graphite production wastewater treatment method, comprise the following steps:Press filtration, dissolved air flotation and flocculation sediment tertiary treatment method are used first, remove the solid suspension in waste water water body;Combined again using aeration and add alkali lye to adjust the pH value of water body;Anaerobic Treatment is finally used, using the organic matter macromolecular in the anaerobic bacteria differentiation degraded water body in biochemical sludge, the CODcr contents in water body is reduced, the purified treatment to the industrial wastewater is completed finally by charcoal absorption.This method is to the comprehensive, thorough of graphite production wastewater treatment, ecology, and water pH value is 6.5~7.5, CODcr values in 50mgO after processing2To national relevant emission standards, technical guarantee is provided for the green production of graphite in below 10mg/L for/below L, SS value.This method is practical, suitable for graphite material manufacturing enterprise industrial applications.

Description

Cell negative electrode material graphite production wastewater treatment method
Technical field
The present invention relates to sewage treatment area, and in particular to a kind of cell negative electrode material graphite production wastewater treatment method.
Background technology
Graphite material is larger as main ion secondary battery cathode material lithium, demand at present.And given birth in graphite material Need to carry out raw material chemical purification and separation of solid and liquid processing during production, wherein substantial amounts of industrial wastewater can be produced, it is this Industrial wastewater is in organic chemical reagent that is acid and containing residual and is lost in the graphite microparticles particulate entered, therefore the Industry Waste Aqueous corrosion is strong, CODcr(COD)Content is high, solid suspension(SS values)Content is high(SS values are 300~500mg/ L).Therefore the industrial wastewater must be handled to remove the pollutant in water body, reaches national relevant emission standards, Avoid polluting environment.
Graphite production wastewater treatment method mainly carries out neutralization reaction and removal waste water by adding chemical reagent at present In impurity, but the method majority step can consume chemical reagent, and handle not thorough.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of cell negative electrode material graphite production wastewater treatment method, with complete It is face, ecology to solve the problems, such as caused industrial wastewater pollution environment in graphite material production process.
The present invention provides a kind of cell negative electrode material graphite production wastewater treatment method, and it comprises the following steps:
(1)Caused waste water in graphite production process is sent into filter press, filtered by the filter cloth of filter press;
(2)By step(1)Waste water after filtering is sent into dissolved air flotation pond, and liquid level scum silica frost is struck off scum silica frost collecting pit by Slag Scraping Device;
(3)By step(2)Waste water after processing is sent into flocculation sedimentation tank, opens mixer and carries out mechanical agitation, to flocculation sediment Flocculant is added in pond, the supernatant liquor of formation is discharged into pH regulating reservoirs, lower sediment is sent into sewage pump, sewage pump is by lower floor Pump is precipitated to filter press, the clear liquid obtained after press filtration is discharged into pH regulating reservoirs;
(4)Sodium hydroxide solution is added into pH regulating reservoirs, the pH for making pH adjustment pond is 6.5~7.5, during addition, Start water treatment aeration device;
(5)By step(4)Waste water after processing is sent into the anaerobic treatment pool for having anaerobic bacteria, to handle organic macromolecule;
(6)By step(5)Waste water after processing is sent into sedimentation basin and carries out secondary precipitation;
(7)By step(6)Gained supernatant is sent into charcoal canister and carries out adsorption treatment after precipitation;
Preferably, step(1)The Stress control of middle filter press is 10~30MPa, filter press part material be 304 stainless steels and/ Or polytetrafluoroethylene (PTFE).
Preferably, step(3)Middle flocculant is PAMC(PAM), aluminium polychloride(PAC), sulfuric acid it is sub- Iron(FeSO4), bodied ferric sulfate(PFS), PAFS(PFAS), poly-ferric sulfate chloride(PFCS)In one kind or several Kind, its addition is treat flocculation treatment wastewater quality 0.1 ‰~1 ‰.
Preferably, step(4)Sewerage disposing aerator is micropore aeration pipe, and its material is 304 stainless steels.
Preferably, step(4)It is provided with pH meter in middle pH regulating reservoirs, the pH of water body in real-time detection cell.
Preferably, step(4)In, sodium hydroxide solution mass percent concentration is 25%~30%.
Preferably, step(5)Sludge gas collecting device is provided with the top of middle anaerobism regulating reservoir.
Preferably, step(7)Activated carbon in middle charcoal canister is cocoanut active charcoal, and granularity is 5~20mm.
Preferably, step(2)The scum silica frost of middle scum silica frost collecting pit is by pressing slag machine to be processed into solid refuse outward transport cleaning.
Preferably, by step(3)Lower sediment is handled into gained filter cake by filter press to handle as solid refuse outward transport.
The present invention has following positive beneficial technique effect:
1. the present invention employs physics for the property feature of cell negative electrode material graphite production waste water, synthesis(Press filtration, air supporting point From, charcoal absorption), chemistry(Flocculation sediment)And biological method(Anaerobic Treatment), to industrial wastewater caused by graphite production Handled, solve that the waste water corrosivity is strong, CODcr contents are high, suspension content is high, finally realized to the industrial wastewater Innocuity treatment problem.
2. the tertiary treatment method that the present invention is organically combined using press filtration, dissolved air flotation and flocculation sediment successively, is first removed Solid suspension in waste water water body(Its SS value is set to be down to below 10mg/L), then combined using aeration and add alkali lye to adjust water The pH value of body(It is 6.5 ~ 7.5 to make its pH value), finally using Anaerobic Treatment, break up degradation water using the anaerobic bacteria in biochemical sludge Organic matter macromolecular in body, reduce the CODcr contents in water body(CODcr is down to 50 mgO2/ below L)It is useless to graphite production Comprehensively, thoroughly, water pH value is 6.5~7.5, CODcr values in 50mgO after processing for the processing of water2/ below L, SS value are in 10mg/L Below.
3. using the processing method of the ecologies such as press filtration, Air Exposure, bio anaerobic processing and charcoal absorption, meet and build The theory of vertical friendly environment society.
4. this method is practical, suitable for graphite material manufacturing enterprise industrial applications.
Embodiment
Illustrate the embodiment of the present invention with reference to embodiment, but following examples are used only to describe in detail The present invention, the scope not limiting the invention in any way.
A kind of cell negative electrode material graphite production wastewater treatment method of embodiment 1, comprises the following steps:
(1)Caused waste water in graphite production process is sent into the filter press under 20MPa pressure conditions, by the filter cloth of filter press Filtered, the SS values after filtering in water body are reduced to below 100mg/L.
(2)By step(1)Waste water after processing is sent into dissolved air flotation pond, and liquid level scum silica frost is struck off scum silica frost and collected by Slag Scraping Device Pond, the scum silica frost in scum silica frost collecting pit is passed through after pressure slag machine is processed into solid refuse and transports outward cleaning.SS in water body after treatment Value is reduced to below 60mg/L.
(3)By step(2)Waste water after processing is sent into flocculation sedimentation tank, opens mixer and carries out mechanical agitation, to flocculation PAMC is added in sedimentation basin(PAM), its addition is the 0.5 ‰ of wastewater quality, by the supernatant liquor of formation PH regulating reservoirs are discharged into, lower sediment is sent into sewage pump, sewage pump is clear by what is obtained after press filtration by lower sediment pump to filter press Liquid is discharged into pH regulating reservoirs.SS values are reduced to below 10mg/L in water body after treatment.
(4)The sodium hydroxide solution that mass percent concentration is 25%~30% is uniformly slowly added into pH regulating reservoirs, is adjusted The pH value in pH adjustment pond is saved to 6.5~7.5, during addition, starts water treatment aeration device, the online real-time detection pH of PH meters Value.
(5)By step(4)Waste water after processing is sent into the anaerobic treatment pool for having anaerobic bacteria, to organic macromolecule Reason, while the sludge gas collecting device at the top of anaerobism regulating reservoir is collected processing to biogas caused by Anaerobic wastewater treatment.By CODcr values are reduced to 50mgO after processing2/ below L.
(6)By step(5)Waste water after processing is sent into sedimentation basin and carries out secondary precipitation.
(7)By step(6)Gained supernatant is sent into and had in the 5~20mm charcoal canister of cocoanut active charcoal after precipitation, right Waste water carries out adsorption treatment.
A kind of cell negative electrode material graphite production wastewater treatment method of embodiment 2, comprises the following steps:
(1)Caused waste water in graphite production process is sent into the filter press under 20MPa pressure conditions, by the filter cloth of filter press Filtered, the SS values after filtering in water body are reduced to below 100mg/L.
(2)By step(1)Waste water after processing is sent into dissolved air flotation pond, and liquid level scum silica frost is struck off scum silica frost and collected by Slag Scraping Device Pond, the scum silica frost in scum silica frost collecting pit is passed through after pressure slag machine is processed into solid refuse and transports outward cleaning.SS in water body after treatment Value is reduced to below 60mg/L.
(3)By step(2)Waste water after processing is sent into flocculation sedimentation tank, opens mixer and carries out mechanical agitation, to flocculation Mass ratio 1 is added in sedimentation basin:1 aluminium polychloride(PAC), ferrous sulfate(FeSO4)Mixture, the addition of the mixture For the 0.6 ‰ of wastewater quality, the supernatant liquor of formation is discharged into pH regulating reservoirs, lower sediment is sent into sewage pump, sewage pump will The clear liquid obtained after press filtration is discharged into pH regulating reservoirs by lower sediment pump to filter press.SS values are reduced in water body after treatment Below 10mg/L.
(4)The sodium hydroxide solution that mass percent concentration is 25%~30% is uniformly slowly added into pH regulating reservoirs, is adjusted The pH value in pH adjustment pond is saved to 6.5~7.5, during addition, starts water treatment aeration device, the online real-time detection pH of PH meters Value.
(5)By step(4)Waste water after processing is sent into the anaerobic treatment pool for having anaerobic bacteria, to organic macromolecule Reason, while the sludge gas collecting device at the top of anaerobism regulating reservoir is collected processing to biogas caused by Anaerobic wastewater treatment.By CODcr values are reduced to 50mgO after processing2/ below L.
(6)By step(5)Waste water after processing is sent into sedimentation basin and carries out secondary precipitation.
(7)By step(6)Gained supernatant is sent into and had in the 5~20mm charcoal canister of cocoanut active charcoal after precipitation, right Waste water carries out adsorption treatment.
A kind of cell negative electrode material graphite production wastewater treatment method of embodiment 3, comprises the following steps:
(1)Caused waste water in graphite production process is sent into the filter press under 20MPa pressure conditions, waste water is by filter press Filter cloth is filtered, and the SS values after filtering in water body are reduced to below 100mg/L.
(2)By step(1)Waste water after processing is sent into dissolved air flotation pond, and liquid level scum silica frost is struck off scum silica frost and collected by Slag Scraping Device Pond, the scum silica frost in scum silica frost collecting pit is passed through after pressure slag machine is processed into solid refuse and transports outward cleaning.SS in water body after treatment Value is reduced to below 60mg/L.
(3)By step(2)Waste water after processing is sent into flocculation sedimentation tank, opens mixer and carries out mechanical agitation, to flocculation Bodied ferric sulfate is added in sedimentation basin(PFS), its addition is the 1 ‰ of wastewater quality, and the supernatant liquor of formation is discharged into pH adjusts Pond is saved, lower sediment is sent into sewage pump, the clear liquid obtained after press filtration is discharged into pH by lower sediment pump to filter press by sewage pump Regulating reservoir.SS values are reduced to below 10mg/L in water body after treatment.
(4)The sodium hydroxide solution that mass percent concentration is 25% ~ 30%, regulation are uniformly slowly added into pH regulating reservoirs The pH value in pH adjustment pond during addition, starts water treatment aeration device, online PH meters detect pH in real time to 6.5~7.5 Value.
(5)By step(4)Waste water after processing is sent into the anaerobic treatment pool for having anaerobic bacteria, to organic macromolecule Reason, while the sludge gas collecting device at the top of anaerobism regulating reservoir is collected processing to biogas caused by Anaerobic wastewater treatment.By CODcr values are reduced to 50mgO after processing2/ below L.
(6)By step(5)Waste water after processing is sent into sedimentation basin and carries out secondary precipitation.
(7)By step(6)Gained supernatant is sent into and had in the 5~20mm charcoal canister of cocoanut active charcoal after precipitation, right Waste water carries out adsorption treatment.
A kind of cell negative electrode material graphite production wastewater treatment method of embodiment 4, comprises the following steps:
(1)Caused waste water in graphite production process is sent into the filter press under 20MPa pressure conditions, by the filter cloth of filter press Filtered, the SS values after filtering in water body are reduced to below 100mg/L.
(2)By step(1)Waste water after processing is sent into dissolved air flotation pond, and liquid level scum silica frost is struck off scum silica frost and collected by Slag Scraping Device Pond, the scum silica frost in scum silica frost collecting pit is passed through after pressure slag machine is processed into solid refuse and transports outward cleaning.SS in water body after treatment Value is reduced to below 60mg/L.
(3)By step(2)Waste water after processing is sent into flocculation sedimentation tank, opens mixer and carries out mechanical agitation, to flocculation Polymerization aluminium iron sulfate is added in sedimentation basin(PFAS), its addition is the 0.8 ‰ of wastewater quality, by the supernatant liquor of formation PH regulating reservoirs are discharged into, lower sediment is sent into sewage pump, sewage pump is clear by what is obtained after press filtration by lower sediment pump to filter press Liquid is discharged into pH regulating reservoirs.SS values are reduced to below 10mg/L in water body after treatment.
(4)The sodium hydroxide solution that mass percent concentration is 25%~30% is uniformly slowly added into pH regulating reservoirs, is adjusted The pH value in pH adjustment pond is saved to 6.5~7.5, during addition, starts water treatment aeration device, the online real-time detection pH of PH meters Value.
(5)By step(4)Waste water after processing is sent into the anaerobic treatment pool for having anaerobic bacteria, to organic macromolecule Reason, while the sludge gas collecting device at the top of anaerobism regulating reservoir is collected processing to biogas caused by Anaerobic wastewater treatment.By CODcr values are reduced to 50mgO after processing2/ below L.
(6)By step(5)Waste water after processing is sent into sedimentation basin and carries out secondary precipitation.
(7)By step(6)Gained supernatant is sent into and had in the 5~20mm charcoal canister of cocoanut active charcoal after precipitation, right Waste water carries out adsorption treatment.
A kind of cell negative electrode material graphite production wastewater treatment method of embodiment 5, comprises the following steps:
(1)Caused waste water in graphite production process is sent into the filter press under 20MPa pressure conditions, by the filter cloth of filter press Filtered, the SS values after filtering in water body are reduced to below 100mg/L.
(2)By step(1)Waste water after processing is sent into dissolved air flotation pond, and liquid level scum silica frost is struck off scum silica frost and collected by Slag Scraping Device Pond, the scum silica frost in scum silica frost collecting pit is passed through after pressure slag machine is processed into solid refuse and transports outward cleaning.SS in water body after treatment Value is reduced to below 60mg/L.
(3)By step(2)Waste water after processing is sent into flocculation sedimentation tank, opens mixer and carries out mechanical agitation, to flocculation Poly-ferric sulfate chloride is added in sedimentation basin(PFCS), its addition is the 0.7 ‰ of wastewater quality, and the supernatant liquor of formation is discharged into PH regulating reservoirs, lower sediment is sent into sewage pump, sewage pump arranges the clear liquid obtained after press filtration lower sediment pump to filter press Enter pH regulating reservoirs.SS values are reduced to below 10mg/L in water body after treatment.
(4)The sodium hydroxide solution that mass percent concentration is 25% ~ 30%, regulation are uniformly slowly added into pH regulating reservoirs The pH value in pH adjustment pond during addition, starts water treatment aeration device, online pH meter detects pH in real time to 6.5~7.5 Value.
(5)By step(4)Waste water after processing is sent into the anaerobic treatment pool for having anaerobic bacteria, to organic macromolecule Reason, while the sludge gas collecting device at the top of anaerobism regulating reservoir is collected processing to biogas caused by Anaerobic wastewater treatment.By CODcr values are reduced to 50mgO after processing2/ below L.
(6)By step(5)Waste water after processing is sent into sedimentation basin and carries out secondary precipitation.
(7)By step(6)Gained supernatant is sent into and had in the 5~20mm charcoal canister of cocoanut active charcoal after precipitation, right Waste water carries out adsorption treatment.
Involved instrument and equipment is routine instrument device unless otherwise instructed in above example;Involved work Industry raw material is commercially available regular industrial raw material unless otherwise instructed.
The present invention is described in detail above in conjunction with embodiment, still, person of ordinary skill in the field can Understand, on the premise of present inventive concept is not departed from, each design parameter in above-described embodiment can also be changed, shape Into multiple specific embodiments, it is common excursion of the invention, is no longer described in detail one by one herein.

Claims (10)

  1. A kind of 1. cell negative electrode material graphite production wastewater treatment method, it is characterised in that comprise the following steps:
    (1)Caused waste water in graphite production process is sent into filter press, filtered via the filter cloth of filter press;
    (2)By step(1)Waste water after filtering is sent into dissolved air flotation pond, and liquid level scum silica frost is struck off scum silica frost collecting pit by Slag Scraping Device;
    (3)By step(2)Waste water after processing is sent into flocculation sedimentation tank, opens mixer and carries out mechanical agitation, to flocculation sediment Flocculant is added in pond, the supernatant liquor of formation is discharged into pH regulating reservoirs, lower sediment is sent into sewage pump, sewage pump is by lower floor Pump is precipitated to filter press, the clear liquid obtained after press filtration is discharged into pH regulating reservoirs;
    (4)Sodium hydroxide solution is added into pH regulating reservoirs, the pH for making pH adjustment pond is 6.5~7.5, during addition, Start water treatment aeration device;
    (5)By step(4)Waste water after processing is sent into the anaerobic treatment pool for having anaerobic bacteria, to handle organic macromolecule;
    (6)By step(5)Waste water after processing is sent into sedimentation basin and carries out secondary precipitation;
    (7)By step(6)Gained supernatant is sent into charcoal canister and carries out adsorption treatment after precipitation.
  2. 2. cell negative electrode material graphite production wastewater treatment method according to claim 1, it is characterised in that step(1) Described in the Stress control of filter press be 10~30MPa, filter press part material is 304 stainless steels and/or polytetrafluoroethylene (PTFE).
  3. 3. cell negative electrode material graphite production wastewater treatment method according to claim 1, it is characterised in that in step (3)In, the flocculant is PAMC, aluminium polychloride, ferrous sulfate, bodied ferric sulfate, polyaluminium sulfate At least one of iron, poly-ferric sulfate chloride are several, and its addition is 0.1 ‰~the 1 ‰ of pending wastewater quality.
  4. 4. cell negative electrode material graphite production wastewater treatment method according to claim 1, it is characterised in that in step (4)In, the water treatment aeration device is micropore aeration pipe, and its material is 304 stainless steels.
  5. 5. cell negative electrode material graphite production wastewater treatment method according to claim 1, it is characterised in that in step (4)In, it is provided with pH meter in the pH regulating reservoirs, the pH of water body in real-time detection cell.
  6. A kind of 6. cell negative electrode material graphite production wastewater treatment method according to claim 1, it is characterised in that step (4)In, the sodium hydroxide solution mass percent concentration is 25%~30%.
  7. 7. cell negative electrode material graphite production wastewater treatment method according to claim 1, it is characterised in that in step (5)In, it is provided with sludge gas collecting device at the top of the anaerobism regulating reservoir.
  8. 8. cell negative electrode material graphite production wastewater treatment method according to claim 1, it is characterised in that step(7) Described in activated carbon in charcoal canister be cocoanut active charcoal, granularity is 5~20mm.
  9. 9. cell negative electrode material graphite production wastewater treatment method according to claim 1, it is characterised in that in step (2)In, the scum silica frost of the scum silica frost collecting pit is by pressing slag machine to be processed into solid refuse outward transport cleaning.
  10. 10. cell negative electrode material graphite production wastewater treatment method according to claim 1, it is characterised in that in step (3)In, the lower sediment is handled through filter cake obtained by filter press press filtration as solid refuse outward transport.
CN201710797812.7A 2017-09-06 2017-09-06 Cell negative electrode material graphite production wastewater treatment method Pending CN107522358A (en)

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Application publication date: 20171229