CHENKan,ZHANGZhi-hao,YEChao,et al.Organic Wastewater Treatment Project Case of Iron Phosphate Cathode Material Production for Battery[J].China Water & Wastewater,2024,40(8):130-136.
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Organic Wastewater Treatment Project Case of Iron Phosphate Cathode Material Production for Battery

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第8期 Page: 130-136 Column: Date of publication: 2024-04-17
Author(s):
CHEN　Kan1; 2;  ZHANG　Zhi-hao1;  YE　Chao2;  FANG　Rui3; 4;  WANG　Qi3; 4;  ZHANG　Kun3; 4;  MA　Ji2;  ZHENG　Tong1
（1. School of Environment， Harbin Institute of Technology， Harbin 150001， China； 2. Suzhou Sujing Environmental Engineering Co. Ltd.， Suzhou 215000， China； 3. Urban Water Resources Development and Utilization National Engineering Research Center， Harbin 150001， China； 4. Guangdong Yuehai Water Investment Co. Ltd.， Shenzhen 518000， China）
Keywords:
automotive battery;  furnace wastewater;  exhaust gas scrubber wastewater;  iron phosphate cathode material;  evaporative drying;  biochemical treatment
Abstract:
The furnace wastewater and exhaust gas scrubber wastewater generated by an enterprise producing iron phosphate cathode materials for automotive batteries has the volume of 15 m3/d, and contains high concentrations of sulfur and nitrogen organic pollutants such as furans, organic amines, and thiazoles, as well as suspended solids, which have poor biodegradability and high treatment costs. Most of suspended solids, COD, NH3-N, and TN in the organic wastewater are fixed into the solid waste for removal by coagulation sedimentation, single-effect evaporation, and scraper drum drying. The treated wastewater is mixed and diluted with 150 m3/d of circulating cooling water from the plant area after coagulation sedimentation, and is further treated using an AO and MBR technology to achieve denitrification and removal of organic substances. The total investment in this project amounted to 12 million yuan, resulting in a 77.2% reduction in treatment cost compared to previous commissioned treatment. Operational results demonstrate that the average removal efficiency of COD, NH3-N, and TN of the combined treatment process achieve 99.79%, 99.87% and 99.90%, respectively. The final effluent quality meets the indirect discharge standards specified in the Emission Standards of Pollutants for Inorganic Chemical Industry (GB/T 31573-2015), with COD≤ 200 mg/L, ammonia nitrogen less than 40 mg/L, and total nitrogen less than 60 mg/L.
Last Update: 2024-04-17