In the production process of lithium batteries, process wastewater and cleaning sewage will be generated, and the direct discharge of these sewage will cause certain pollution to the surrounding environment. The main sources of lithium battery wastewater are the production wastewater generated in the production process and the ground and equipment flushing water, and the main components are lithium cobalt oxide, NMP (methylpyrrolidone), toner and esters containing small molecule organic matter. The difficulty in the treatment of lithium battery production wastewater lies in the high relative cost of treating wastewater, the high requirements for operators, and the difficulty in ensuring the quality of industrial wastewater treatment effluent. Therefore, for lithium battery wastewater treatment, it is necessary to build a lithium battery wastewater treatment system project with targeted needs according to the specific situation of each production enterprise and the discharge standards of local industrial wastewater, so as to ensure the efficient and stable operation of the wastewater treatment station after completion.

As a professional industrial wastewater treatment environmental protection equipment engineering technology company specializing in providing one-stop solutions for wastewater reuse and zero discharge,  Protection analyzes lithium battery wastewater treatment technology methods for lithium battery manufacturers, provides targeted customized lithium battery wastewater treatment technology solutions, and builds lithium battery wastewater treatment environmental protection equipment projects with stable operation and standards.

1. Lithium battery wastewater treatment technology method

At present, the treatment of lithium battery production wastewater mainly adopts physicochemical method, chemical oxidative decomposition, electrochemical method, activated carbon adsorption, reverse osmosis, evaporation and other treatment technologies. However, these methods are relatively expensive to treat wastewater, and have high requirements for operators, so it is difficult to achieve stable discharge or zero discharge of wastewater. Since wastewater will contain pollutants such as heavy metals, the pretreatment method can be coagulation and sedimentation. Hydroxide precipitates are formed in the wastewater under alkaline conditions, which are then coagulated and precipitated by the addition of PAM. After pretreatment, all kinds of wastewater enter the regulating tank, and then use biochemical treatment to remove organic matter and other pollutants in the wastewater. Biochemical treatment can be carried out in the form of "UASB + A/O tank + secondary sedimentation tank" to remove pollutants from wastewater through the action of microorganisms. Then the evaporation and concentration treatment is carried out to achieve the purpose of stable discharge up to the standard. For lithium battery manufacturers with strict requirements,  Protection adopts the advanced treatment technology of lithium battery wastewater, and reuses the lithium battery wastewater for production after advanced treatment, so as to achieve zero discharge of lithium battery wastewater.

2. Lithium battery wastewater treatment process

Core process: DTRO, MBR evaporation, desalination (electrodialysis system, RO system)

Standard discharge: conditioning system, physicochemical pretreatment system, biochemical system, MBR system, ion exchange

Reclaimed water reuse: regulation system, filtration system, coagulation and flocculation, evaporation system, ceramic membrane, biochemical, air flotation, RO, ultrafiltration

Zero emission: conditioning system, physicochemical pretreatment system, biochemical system, MBR system, ion exchange, ultrafiltration, reverse osmosis, evaporation

In the production process of lithium batteries, a small amount of process wastewater and cleaning sewage will be generated, and the direct discharge of these sewage will cause certain pollution to the surrounding environment.