锂电池生产废水处理及中水回用工程实例

采用电絮凝-混凝-AAO法-MBR-反硝化滤池-硝化滤池-清水池组合工艺初步处理某新能源公司锂电池生产废水后,再使用超滤-反渗透工艺对该废水进行深度处理以达到回用目的-工程实际运行结果表明,一级RO出水COD为20mg/L,NH3-N.TN.TP的质量浓度分别为0.77、14.8、0.06mg/L,pH为7.2,SS未检出,水质满足GB/T19923-2005中敞开式循环冷却水系统补充水标准的要求,可直接回用;二级RO出水COD为17mg/L,NH3-N,TN.TP的质量浓度分别为0.42.11.6.0.03mg/L,pH为6.7,SS未检出,水质达到GB3838-2002的IV类标准和GB30484-2013的表3新建企业水污染物排放限值的直接排放标准.水处理运行费用共计46.56元/m3.

Engineering Project of Lithium Battery Production Wastewater Treatment and Reuse

After the preliminary treatment of a new energy company's lithium battery production wastewater by electroflocculation/coagulation/AAO/ MBR/ denitrification filter/nitrification filter/clearing tank process, the wastewater was further treated using an ultrafiltration/reverse osmosis process to reach reuse purposes. The actual operation results of the project showed that, the COD, mass concentration of NH3-N, TN and TP in first-stage RO effluent was 20 mg/L, 0.77, 14.8 and 0.06 mg/L, respectively, pH was 7.2 and SS was not detected, the water quality met the requirements of the supplementary water standard for the open circulating cooling water system of GB/T 19923-2005, and could be directly reused. The COD, mass concentration ofNH3-N, TN and TP in secondary RO effluent was 17 mg/L, 0.42, 11.6 and 0.03 mg/L, respectively, pH was 6.7 and SS was not detected, The water quality reached the Class IV standard of GB 3838-2002 and the direct emission standards for new enterprise water pollutant discharge limits in Table 3 of GB 30484 - 2013. The total water treatment cost was 46.56 yuan/m^3.