CN108640420A - A kind for the treatment of process of lithium battery waste liquid - Google Patents
A kind for the treatment of process of lithium battery waste liquid Download PDFInfo
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- CN108640420A CN108640420A CN201810437918.0A CN201810437918A CN108640420A CN 108640420 A CN108640420 A CN 108640420A CN 201810437918 A CN201810437918 A CN 201810437918A CN 108640420 A CN108640420 A CN 108640420A
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- lithium battery
- waste liquid
- pond
- battery waste
- denitrification
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The present invention relates to technical field of sewage, and in particular to a kind for the treatment of process of lithium battery waste liquid, treatment process include the following steps：(1) electrochemical treatments：Lithium battery waste liquid is introduced into electrochemical treatments system and carries out electric flocculation reaction；(2) AOAO processing：Lithium battery waste liquid after coagulating kinetics is introduced into the first anoxic pond, aerobic tank, the second anoxic pond and MBR membrane bioreactors successively；(3) denitrification and nitrification：By AOAO, treated that lithium battery waste liquid introduces successively that denitrification pond carries out anti-nitration reaction and nitrating aeration biofilter carries out nitration reaction, MBR membrane bioreactors are equipped with the first return duct to the first anoxic pond, and nitrating aeration biofilter is equipped with the second return duct to denitrification pond.After lithium battery waste liquid undergoes the above treatment process, the waste liquid not only emitted meets the requirements of the national standard of GB30484 2013, but also denitrification percent is greatly improved.
Description
Technical field
The present invention is novel to be related to lithium battery field of waste liquid treatment, and in particular to a kind for the treatment of process of lithium battery waste liquid.
Background technology
It by lithium metal or power alloy is negative material, using the battery of non-aqueous electrolytic solution that lithium battery, which is a kind of,.Due to
The advantages such as lithium battery energy savings are big, service life is long, discharge rate is low are widely used in video camera, cell phone, notes
Among the fields such as this computer.But lithium battery will produce a large amount of waste liquid in production, which contains a large amount of organic pollution,
Need the national standard that can just meet GB30484-2013 by artificial liquid waste processing discharge.
Application No. is propose a kind of lithium battery in 201710015803.8 patent document disclosed in 17 days Mays in 2017
The treatment process and its processing system of waste liquid are handled, drop by electrochemical treatments, A2/O processing and nitration denitrification group technology
The pollutant load of low lithium battery waste liquid, makes discharge meet standard GB/T 30484-2013, however, the nitric efficiency of this method
Relatively low, denitrification percent can only achieve 70%, cannot be satisfied the water outlet requirement of high quality.
Invention content
The purpose of the present invention is to provide a kind for the treatment of process of lithium battery waste liquid, which has higher denitrogenation
Treatment effeciency.
The technical solution adopted in the present invention is a kind for the treatment of process of lithium battery waste liquid, is included the following steps：(1) electrochemical
Handle：Lithium battery waste liquid is introduced into electrochemical treatments system and carries out electric flocculation reaction；(2) AOAO processing：By electrochemical treatments
Lithium battery waste liquid afterwards introduces the first anoxic pond, aerobic tank, the second anoxic pond and MBR membrane bioreactors successively；(3) denitrification
And nitrification：By AOAO, treated that lithium battery waste liquid introduces successively that denitrification pond carries out anti-nitration reaction and nitrating aeration biological filter
Pond carries out nitration reaction.The first return duct, the MBR are equipped between the MBR membrane bioreactors and first anoxic pond
The lithium battery waste reflux ratio of membrane bioreactor to first anoxic pond is denitrification pond and described described in 50%-150%
The second return duct, the lithium battery in the denitrification pond to the nitrating aeration biofilter are equipped between nitrating aeration biofilter
Reflux ratio is 50%-150%.
The electrochemical treatments that the present invention uses make the colloidal state impurity and suspended impurity coagulative precipitation in waste water and detach, band
Swimming occurs in the electric field for the contaminant particle of electricity, and Partial charge is neutralized by electrode and it is promoted to take off steady coagulation, simultaneously because
The oxidation of anode and Huaiyuan effect of cathode, can remove multiple pollutant in water removal.The sewage of wherein return duct reflux has
More microorganisms keep content of microorganisms and ability of depolluting, promote the efficiency of processing lithium battery waste liquid, obtain higher matter
The discharge sewage of amount.AOAO processing and nitration denitrification process are finally used, further decreases and is polluted in lithium battery waste liquid
Object content, the comparison prior art remove 70% nitrogen content, and the present invention can further reach in removal lithium battery waste liquid 95% and contain
Nitrogen quantity realizes advanced nitrogen, improves effluent quality.
Preferably, anoxic pond dissolved oxygen amount is 0.2-0.5ppm, and the aerobic tank dissolved oxygen amount is 2-4ppm.In this dissolved oxygen amount
Under environment, it is more advantageous to microorganism decomposition, improves decomposition efficiency.
Preferably, before the step (1) further include step A pretreatments：Lithium battery waste liquid is introduced into aerating regulation pond,
It is stirred in the aerating regulation pond, aeration gas-water ratio is 1:1-8:1, residence time 6-24h.Using the processing mode,
The microorganism in lithium battery waste liquid can be enabled largely to multiply, be conducive to subsequent processing.
Preferably, further include step B processing between the step (1) and step (2)：By the lithium battery after electrochemical treatments
Waste liquid is introduced into successively in coagulative precipitation tank and comprehensive adjustment pond, is launched in the comprehensive adjustment pond for promoting microbial proliferation
Sanitary sewage, the injected volume of the sanitary sewage are the 5-100% of the mass flow of lithium battery waste liquid.Containing more in sanitary sewage
The element for kind meeting microbial proliferation, sanitary sewage can be handled simultaneously by so that this programme is become a kind of, at the sewage of lithium battery waste liquid
Science and engineering skill.
Preferably, the electrochemical treatments system in the step (1) causes electricity wadding by the two-plate that DC pulse is powered
Solidifying to react, the voltage between the two-plate is 5-120V, and pole span 3-10cm, the electric flocculation reaction time is 0.1-4h.The present invention
The detail parameters for having adjusted electric flocculation improve the object efficiency of depolluting of electric flocculation reaction.
Preferably, the treatment conditions in the denitrification pond in the step (3) are：5-40 DEG C of water temperature, dissolved oxygen is less than
0.5mg/L, hydraulic detention time 1-10h；The treatment conditions of the nitrating aeration biofilter are：It is aerated gas-water ratio 3:1-
10:1, dissolved oxygen is greater than or equal to 2mg/L, hydraulic detention time 2-10 hours.The condition of offer makes denitrification pond and nitrification expose
Microorganism in gas biofilter reaches balance, will not excessively multiply and also have enough capacities of decomposition.
Compared with prior art, the present invention has following advantageous effect：
A kind for the treatment of process of lithium battery waste liquid of the present invention, the electrochemistry of use, AOAO are handled and are nitrified, at denitrification
Reason combines.Electrochemical treatments are a kind of electric flocculation processing method, so that colloidal state impurity in waste water, suspended impurity is agglomerated using electrolysis heavy
It forms sediment and detaches, and due to the reduction of the oxidation of anode and cathode, multiple pollutant in water removal can be removed.In the present invention
First return duct and the second return duct, sewage is refilled before the step of pond in, since the sewage of reflux has more
Microorganism, can effectively promote the content of microorganism in pond, and then promoted to lithium battery liquid waste processing efficiency.Compared to existing skill
Art, electrochemistry, AOAO processing and nitrification, the denitrification combination processing flow that this programme uses, makes nitric efficiency highest be promoted to
96.5%, lithium battery waste liquid nitrogen-containing pollutant content is greatly reduced, not only conforms with GB30484-2013 requirements, and realize depth
Denitrogenation meets the requirement of high standard effluent quality, more environmentally-friendly.
Description of the drawings
Fig. 1 is a kind of flow diagram of the treatment process of lithium battery waste liquid of the present invention；
In figure：
1, aerating regulation pond 2, electrochemical treatments system 3, coagulative precipitation tank
4, comprehensive adjustment pond 5, the first anoxic pond 6, aerobic tank
7, the second anoxic pond 8, MBR membrane bioreactors 9, denitrification pond
10, nitrating aeration biofilter 11, the first return duct 12, the second return duct
Specific embodiment
Embodiment 1
Fig. 1 is a kind of flow diagram of the treatment process of lithium battery waste liquid, and lithium battery waste liquid flows into aerating regulation first
Pond 1 is stirred in aerating regulation pond 1, and aeration gas-water ratio is 1：1, residence time 6h are disposed into electrochemical treatments
System 2.
In electrochemical treatments system 2, the voltage wherein between the two-plate of electrochemical treatments system 2 is 5V, and pole span is
3cm, electric flocculation reaction time are that 0.1h progress electric flocculation further removes pollutant, flow into coagulative precipitation tank 3 in next step.Coagulation
Sedimentation basin 3 carries out precipitation process to lithium battery waste liquid, and the comprehensive tune using sanitary sewage as nutrients is continued towards after having handled
Save pond 4.The injected volume of sanitary sewage is the 5% of the mass flow of lithium battery waste liquid, effectively facilitates microbial proliferation.
Follow-up lithium battery followed by the first anoxic pond 5, aerobic tank 6, the second anoxic pond 7 and MBR membrane bioreactors 8 into
Single step reaction, the first anoxic pond 5 and MBR membrane bioreactors 8 be equipped with the first return duct 11, in the middle MBR membrane bioreactors 8 to
The lithium battery waste reflux ratio of first anoxic pond 5 is 50%, is disposed into denitrification pond 9.Wherein anoxic pond dissolved oxygen amount is
0.2ppm, aerobic tank 2ppm.
The treatment conditions in denitrification pond 9 are：5 DEG C, dissolved oxygen 0.1mg/L, hydraulic detention time 1h of water temperature；Nitrification exposes
The treatment conditions of gas biofilter 10 are：It is aerated gas-water ratio 3:1, dissolved oxygen 2mg/L, hydraulic detention time 2h, in this condition
Lower processing lithium battery waste liquid.Wherein nitrating aeration biofilter 10 and denitrification pond 9 are additionally provided with the second return duct 12, denitrification pond
The 9 lithium battery reflux ratio to nitrating aeration biofilter 10 is 50%, and the lithium battery waste liquid discharge being disposed substantially conforms to state
Family standard GB30484-2013, denitrification percent are effectively promoted to 95% or so.
Embodiment 2
Fig. 1 is a kind of flow diagram of the treatment process of lithium battery waste liquid, and lithium battery waste liquid flows into aerating regulation first
Pond 1 is stirred in aerating regulation pond 1, and aeration gas-water ratio is 4:1, residence time 12h are disposed at electrochemistry
Reason system 2.
In electrochemical treatments system 2, the voltage wherein between the two-plate of electrochemical treatments system 2 is 45V, and pole span is
5cm, electric flocculation reaction time are that 2h progress electric flocculation further removes pollutant, flow into coagulative precipitation tank 3 in next step.Coagulation is heavy
Shallow lake pond 3 carries out precipitation process to lithium battery waste liquid, and the comprehensive adjustment using sanitary sewage as nutrients is continued towards after having handled
Pond 4.The injected volume of sanitary sewage is the 35% of the mass flow of lithium battery waste liquid, effectively facilitates microbial proliferation.
Follow-up lithium battery followed by the first anoxic pond 5, aerobic tank 6, the second anoxic pond 7 and MBR membrane bioreactors 8 into
Single step reaction, the first anoxic pond 5 and MBR membrane bioreactors 8 be equipped with the first return duct 11, in the middle MBR membrane bioreactors 8 to
The lithium battery waste reflux ratio of first anoxic pond 5 is 75%, is disposed into denitrification pond 9.Wherein anoxic pond dissolved oxygen amount is
0.3ppm, aerobic tank 2.5ppm.
The treatment conditions in denitrification pond 9 are：20 DEG C, dissolved oxygen 0.2mg/L, hydraulic detention time 4h of water temperature；Nitrification
The treatment conditions of biological aerated filter 10 are：It is aerated gas-water ratio 5:1, dissolved oxygen 3mg/L, hydraulic detention time 4h, at this
Lithium battery waste liquid is handled under part.Wherein nitrating aeration biofilter 10 and denitrification pond 9 are additionally provided with the second return duct 12, denitrification
The lithium battery reflux ratio of pond 9 to nitrating aeration biofilter 10 is 75%, and the lithium battery waste liquid discharge being disposed substantially conforms to
Standard GB/T 30484-2013, denitrification percent are effectively promoted to 96% or so.
Embodiment 3
Fig. 1 is a kind of flow diagram of the treatment process of lithium battery waste liquid, and lithium battery waste liquid flows into aerating regulation first
Pond 1 is stirred in aerating regulation pond 1, and aeration gas-water ratio is 6:1, residence time 18h,
It is disposed and enters electrochemical treatments system 2.
In electrochemical treatments system 2, the voltage wherein between the two-plate of electrochemical treatments system 2 is 85V, and pole span is
7cm, electric flocculation reaction time are that 3h progress electric flocculation further removes pollutant, flow into coagulative precipitation tank 3 in next step.Coagulation is heavy
Shallow lake pond 3 carries out precipitation process to lithium battery waste liquid, and the comprehensive adjustment using sanitary sewage as nutrients is continued towards after having handled
Pond 4.The injected volume of sanitary sewage is the 7% of the mass flow of lithium battery waste liquid, effectively facilitates microbial proliferation.
Follow-up lithium battery followed by the first anoxic pond 5, aerobic tank 6, the second anoxic pond 7 and MBR membrane bioreactors 8 into
Single step reaction, the first anoxic pond 5 and MBR membrane bioreactors 8 be equipped with the first return duct 11, in the middle MBR membrane bioreactors 8 to
The lithium battery waste reflux ratio of first anoxic pond 5 is 125%, is disposed into denitrification pond 9.Wherein anoxic pond dissolved oxygen amount is
0.4ppm, aerobic tank 3ppm.
The treatment conditions in denitrification pond 9 are：30 DEG C, dissolved oxygen 0.3mg/L, hydraulic detention time 7h of water temperature；Nitrification
The treatment conditions of biological aerated filter 10 are：It is aerated gas-water ratio 7:1, dissolved oxygen 4mg/L, hydraulic detention time 8 hours, herein
Under the conditions of handle lithium battery waste liquid.Wherein nitrating aeration biofilter 10 and denitrification pond 9 are additionally provided with the second return duct 12, anti-nitre
The lithium battery reflux ratio for changing pond 9 to nitrating aeration biofilter 10 is 125%, the basic symbol of lithium battery waste liquid discharge being disposed
Standard GB/T 30484-2013 is closed, denitrification percent is effectively promoted to 95% or so.
Embodiment 4
Fig. 1 is a kind of flow diagram of the treatment process of lithium battery waste liquid, and lithium battery waste liquid flows into aerating regulation first
Pond 1 is stirred in aerating regulation pond 1, and aeration gas-water ratio is 8:1, the residence time is for 24 hours, to be disposed at electrochemistry
Reason system 2.
In electrochemical treatments system 2, the voltage wherein between the two-plate of electrochemical treatments system 2 is 120V, and pole span is
10cm, electric flocculation reaction time are that 4h progress electric flocculation further removes pollutant, flow into coagulative precipitation tank 3 in next step.Coagulation
Sedimentation basin 3 carries out precipitation process to lithium battery waste liquid, and the comprehensive tune using sanitary sewage as nutrients is continued towards after having handled
Save pond 4.The injected volume of sanitary sewage is the 100% of the mass flow of lithium battery waste liquid, effectively facilitates microbial proliferation.
In electrochemical treatments system 3, the voltage wherein between the two-plate of electrochemical treatments system 3 is 120V, and pole span is
10cm, electric flocculation reaction time are that 4h progress electric flocculation further removes pollutant, flow into make added with sanitary sewage in next step
For the comprehensive adjustment pond 4 of nutrients, the injected volume of sanitary sewage is the 100% of the mass flow of lithium battery waste liquid, promotes micro- life
Object is multiplied.
Follow-up lithium battery followed by the first anoxic pond 5, aerobic tank 6, the second anoxic pond 7 and MBR membrane bioreactors 8 into
Single step reaction, the first anoxic pond 5 and MBR membrane bioreactors 8 be equipped with the first return duct 11, in the middle MBR membrane bioreactors 8 to
The lithium battery waste reflux ratio of first anoxic pond 5 is 150%, is disposed into denitrification pond 9.Wherein anoxic pond dissolved oxygen amount is
0.5ppm, aerobic tank 4ppm.
The treatment conditions in denitrification pond 9 are：40 DEG C, dissolved oxygen 0.4mg/L, hydraulic detention time 10h of water temperature；Nitrification
The treatment conditions of biological aerated filter 10 are：It is aerated gas-water ratio 10:1, dissolved oxygen 5mg/L, hydraulic detention time 10 hours,
Lithium battery waste liquid is handled under the conditions of this.Wherein nitrating aeration biofilter 10 and denitrification pond 9 are additionally provided with the second return duct 12, instead
The lithium battery reflux ratio of nitrification tank 9 to nitrating aeration biofilter 10 is 150%, and the lithium battery waste liquid discharge being disposed is basic
Meet standard GB/T 30484-2013, denitrification percent is effectively promoted to 96.5% or so.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although being explained in detail to the present invention with reference to preferred embodiment, those skilled in the art answer
Work as understanding, technical scheme of the present invention can be modified or replaced equivalently, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (6)
1. a kind for the treatment of process of lithium battery waste liquid, it is characterised in that：Include the following steps：
(1) electrochemical treatments：Lithium battery waste liquid is introduced into electrochemical treatments system and carries out electric flocculation reaction；
(2) AOAO processing：Lithium battery waste liquid after electrochemical treatments is introduced into the first anoxic pond, aerobic tank, the second anoxic successively
Pond and MBR membrane bioreactors；
(3) denitrification and nitrification：By AOAO treated lithium battery waste liquid introduces successively denitrification pond carries out anti-nitration reactions and
Nitrating aeration biofilter carries out nitration reaction；
In step (2), the first return duct, the MBR films are equipped between the MBR membrane bioreactors and first anoxic pond
The lithium battery waste reflux ratio of bioreactor to first anoxic pond is 50%-150%；
In step (3), the second return duct, the denitrification are equipped between the denitrification pond and the nitrating aeration biofilter
The lithium battery waste reflux ratio of pond to the nitrating aeration biofilter is 50%-150%.
2. a kind for the treatment of process of lithium battery waste liquid according to claim 1, it is characterised in that：
The anoxic pond dissolved oxygen amount is 0.2-0.5ppm, and the aerobic tank dissolved oxygen amount is 2-4ppm.
3. a kind for the treatment of process of lithium battery waste liquid according to claim 1, it is characterised in that：
Further include step A pretreatments before the step (1)：Lithium battery waste liquid introduces aerating regulation pond, in the aerating regulation
It is stirred in pond, aeration gas-water ratio is 1:1-8:1, residence time 6-24h.
4. a kind for the treatment of process of lithium battery waste liquid according to claim 1, it is characterised in that：
Further include step B processing between the step (1) and step (2)：Lithium battery waste liquid after electrochemical treatments is drawn successively
Enter in coagulative precipitation tank and comprehensive adjustment pond, the sanitary sewage for promoting microbial proliferation launched in the comprehensive adjustment pond,
The injected volume of the sanitary sewage is the 5-100% of the mass flow of lithium battery waste liquid.
5. a kind for the treatment of process of lithium battery waste liquid according to claim 1, it is characterised in that：
Electrochemical treatments system in the step (1) causes electric flocculation reaction by the two-plate that DC pulse is powered, described
Voltage between two-plate is 5-120V, and pole span 3-10cm, the electric flocculation reaction time is 0.1-4h.
6. a kind for the treatment of process of lithium battery waste liquid according to claim 1, it is characterised in that：
The treatment conditions in the denitrification pond in the step (3) are：5-40 DEG C of water temperature, dissolved oxygen are less than 0.5mg/L, hydraulic retention
Time is 1-10h；
The treatment conditions of the nitrating aeration biofilter are：It is aerated gas-water ratio 3:1-10:1, dissolved oxygen is greater than or equal to 2mg/
L, hydraulic detention time 2-10 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810437918.0A CN108640420A (en) | 2018-05-09 | 2018-05-09 | A kind for the treatment of process of lithium battery waste liquid |
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| CN201810437918.0A CN108640420A (en) | 2018-05-09 | 2018-05-09 | A kind for the treatment of process of lithium battery waste liquid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109384358A (en) * | 2018-12-17 | 2019-02-26 | 南京大学 | A kind of integrated denitrification filter pool for charging flocculation plant |
| CN110436593A (en) * | 2019-08-16 | 2019-11-12 | 金为环保科技(常州)有限公司 | A method of N methyl pyrrolidone in recycling Anode of lithium cell waste liquid |
| CN111875061A (en) * | 2020-08-06 | 2020-11-03 | 江苏道同环境科技有限公司 | Recycling device and process for high-hardness nitrate wastewater |
| CN113293100A (en) * | 2021-04-23 | 2021-08-24 | 东莞市科绿智能环保科技有限公司 | Method for culturing special microorganisms for lithium battery wastewater treatment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109384358A (en) * | 2018-12-17 | 2019-02-26 | 南京大学 | A kind of integrated denitrification filter pool for charging flocculation plant |
| CN110436593A (en) * | 2019-08-16 | 2019-11-12 | 金为环保科技(常州)有限公司 | A method of N methyl pyrrolidone in recycling Anode of lithium cell waste liquid |
| CN111875061A (en) * | 2020-08-06 | 2020-11-03 | 江苏道同环境科技有限公司 | Recycling device and process for high-hardness nitrate wastewater |
| CN113293100A (en) * | 2021-04-23 | 2021-08-24 | 东莞市科绿智能环保科技有限公司 | Method for culturing special microorganisms for lithium battery wastewater treatment |
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Application publication date: 20181012 |