Customer Profile: * * Lithium Energy is one of the world's major suppliers of green high-energy lithium batteries with international advanced technology level. It has a collaborative research and development platform from materials, cells, BMS to systems, mainly producing consumer batteries and power batteries, providing a full system new energy solution for the new energy era represented by the Internet of Things and new energy vehicles.

        Project Name: * * Lithium Energy Co., Ltd.

        Project Name: * * Lithium Energy Battery Steel Shell Rinse Wastewater

        Project scale: 24 tons/day battery cleaning wastewater reuse

        Run time: 2024

        Main process: degreasing filter+degreasing ultrafiltration+pretreatment+three-stage RO+EDI

        Processing standard: 10M Ω. cm

        Project features: The rinsing wastewater contains a small amount of lifting oil, a small amount of cleaning agent, and rust inhibitor, with a COD of up to 1500mg/L,; No biochemical or physicochemical treatment system, stable effluent quality, reliable equipment operation, beautiful site, highly recognized by the owner.

      Process and membrane system selection

      In order to achieve standard treatment and high-quality reuse of wastewater, we have adopted the following process flow:

      Oil removal filter: Use an oil removal filter to remove most of the grease in wastewater.

      Oil removal ultrafiltration: using ultrafiltration to further remove oil and suspended solids from wastewater.

      Pre treatment: Remove large particulate impurities and suspended solids from wastewater through facilities such as sand filtration and carbon filtration.

      Membrane system treatment: This is the core link of the entire treatment process. After comprehensive evaluation, we have chosen the third level RO+EDI：

      Using reverse osmosis membrane to remove soluble inorganic salts, heavy metal ions, macromolecular organic compounds, colloids, and microorganisms.

      EDI: Using high voltage at both ends of the electrode to move charged ions in water, and cooperating with ion exchange resin and selective resin membrane to accelerate ion movement and removal, thus achieving the purpose of water purification. The final water resistance rate of this project remains stable at 10M Ω. cm.

      The success of the case provides valuable experience for the treatment and reuse of such wastewater. We will continue to explore and optimize wastewater treatment processes, strive to play a more important role in the field of wastewater treatment and reuse, and contribute more to achieving the goal of sustainable development of water resources.