Case of a near zero discharge integrated water treatment system in lithium-iron manganese phosphate plant
This study presents a comprehensive solution for the water treatment system in a lithium-iron manganese phosphate battery cathode materials production facility in Zhejiang prov-ince.The wastewater treatment process includes secondary physicochemical coagulation-precipitati-on,sand filtration,manganese sand filtration,resin adsorption,reverse osmosis,high-pressure re-verse osmosis,and mechanical vapor recompression(MVR).The pure water system utilizes sand filtration,activated carbon filtration,softening resin,reverse osmosis,and concentrated water re-verse osmosis.The reverse osmosis system is equipped with a high-flow internal circulation system to enhance recovery rates and pollution resistance.All treated water from the wastewater treat-ment system is recycled back into the production-grade pure water preparation system.The wastewater consists of high-concentration wastewater,low-concentration wastewater,and general cleaning wastewater with elevated levels of total phosphorus,hardness,manganese,and iron.The post-treatment production-grade pure water exhibits stable electrical conductivity below 15 μS/cm with consistently low levels of manganese,iron,and total phosphorus below 0.1 mg/L.Since its operation,the effluent quality has been excellent,resulting in near-zero discharge for the entire plant's water treatment system.This project demonstrates significant environmental and economic benefits.
Lithium-iron manganese phosphate wastewaterNear zero liquid dischargeWater treatment systemTotal solution
万方数据
维普
