Lithium battery waste liquid treatment technology

A treatment process, lithium battery technology, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Water requirements, low denitrification efficiency, etc., to achieve the effect of maintaining the microbial content and decontamination ability, increasing the content, and improving the treatment efficiency

Inactive Publication Date: 2018-10-12
GUANGREEN ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the production of lithium batteries, a large amount of waste liquid will be generated, which contains a large amount of organic pollutants, and it needs to be discharged through artificial waste liquid treatment to meet the national standard of GB30484-2013
[0003] The patent document with the application number 201710015803.8 published on May 17, 2017 proposes a lithium battery waste liquid treatment process and its treatment system, through electrochemical treatment, A2 / O treatment and nitrification and denitrification combined process treatment, reducing lithium The pollutant content of the battery waste liquid makes the discharge meet the national standard GB30484-2013. However, the denitrification efficiency of this method is low, and the denitrification rate can only reach 70%, which cannot meet the high-quality effluent requirements

Method used

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  • Lithium battery waste liquid treatment technology

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Effect test

Embodiment 1

[0021] figure 1 It is a schematic flow chart of the treatment process of lithium battery waste liquid. The lithium battery waste liquid first flows into the aeration regulating tank 1 and is stirred in the aeration regulating tank 1. The ratio of aeration gas to water is 1:1, and the residence time is 6h. , enter the electrochemical treatment system 2 after processing.

[0022] In the electrochemical treatment system 2, the voltage between the two pole plates of the electrochemical treatment system 2 is 5V, the pole distance is 3cm, and the electrocoagulation reaction time is 0.1h to further remove pollutants by electrocoagulation, and the next step is to flow into the coagulation sedimentation tank 3. The coagulation-sedimentation tank 3 performs sedimentation treatment on the lithium battery waste liquid, and after the treatment, it continues to flow to the comprehensive adjustment tank 4 that uses domestic sewage as nutrients. The amount of domestic sewage is 5% of the ma...

Embodiment 2

[0026] figure 1 It is a schematic flow chart of the treatment process of lithium battery waste liquid. The lithium battery waste liquid first flows into the aeration regulating tank 1, and is stirred in the aeration regulating tank 1. The aeration gas-water ratio is 4:1, and the residence time is 12h. , enter the electrochemical treatment system 2 after processing.

[0027] In the electrochemical treatment system 2, the voltage between the two pole plates of the electrochemical treatment system 2 is 45V, the pole distance is 5cm, and the electrocoagulation reaction time is 2h for electrocoagulation to further remove pollutants, and the next step is to flow into the coagulation sedimentation tank 3 . The coagulation-sedimentation tank 3 performs sedimentation treatment on the lithium battery waste liquid, and after the treatment, it continues to flow to the comprehensive adjustment tank 4 that uses domestic sewage as nutrients. The amount of domestic sewage is 35% of the mass...

Embodiment 3

[0031] figure 1 It is a schematic flow chart of the treatment process of lithium battery waste liquid. The lithium battery waste liquid first flows into the aeration regulating tank 1 and is stirred in the aeration regulating tank 1. The ratio of aeration gas to water is 6:1, and the residence time is 18h. ,

[0032] After processing, enter the electrochemical treatment system 2.

[0033] In the electrochemical treatment system 2, the voltage between the two pole plates of the electrochemical treatment system 2 is 85V, the pole distance is 7cm, and the electrocoagulation reaction time is 3h for electrocoagulation to further remove pollutants, and the next step is to flow into the coagulation sedimentation tank 3 . The coagulation-sedimentation tank 3 performs sedimentation treatment on the lithium battery waste liquid, and after the treatment, it continues to flow to the comprehensive adjustment tank 4 that uses domestic sewage as nutrients. The amount of domestic sewage is...

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Abstract

The invention relates to the technical field of sewage processing, and concretely relates to a lithium battery waste liquid treatment technology. The treatment technology comprises the following steps: 1) electrochemical treatment: introducing the lithium battery waste liquid in an electrochemical treatment system for electroflocculation; 2) AOAO treatment: introducing the lithium battery waste liquid after coagulating sedimentation in a first anoxic pool, an aerobic pool, a second anoxic pool and a MBR membrane bioreactor in order; and 3) denitrification and nitrification: introducing the lithium battery waste liquid after AOAO treatment in a denitrification pool for a denitrification reaction and a nitrification aerated biofilter for a nitrification reaction in order, wherein a first back flow pipe to the first anoxic pool can be arranged at the MBR membrane bioreactor, and a second back flow pipe to the denitrification pool can be arranged at the nitrification aerated biofilter. After the lithium battery waste liquid is subjected to the above treatment processes, the discharged waste liquid accords with a national standard requirement of GB30484-2013, and the denitrification rate is greatly increased.

Description

technical field [0001] The invention relates to the field of lithium battery waste liquid treatment, in particular to a treatment process for lithium battery waste liquid. Background technique [0002] Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Due to the advantages of large energy storage, long service life and low discharge rate, lithium batteries are widely used in cameras, mobile phones, notebook computers and other fields. However, during the production of lithium batteries, a large amount of waste liquid will be generated, which contains a large amount of organic pollutants, and it needs to be discharged through artificial waste liquid treatment to meet the national standard of GB30484-2013. [0003] The patent document with the application number 201710015803.8 published on May 17, 2017 proposes a lithium battery waste liquid treatment process and its tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F1/44C02F1/463C02F1/52C02F3/30C02F7/00C02F9/00
Inventor 戴双建钟永光程刚张玉岩
Owner GUANGREEN ENVIRONMENTAL PROTECTION ENG
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