厌氧流化床生物技术处理高硝态氮化工废水

摘要

某化工厂催化剂生产废水含有大量NO3--N,单股废水NO3--N质量浓度达到1350 mg/L,影响了全厂综合污水处理场正常运行.车间采用厌氧流化床生物反应器进行脱NO3--N预处理,实际运行结果表明,该工艺对高浓度NO3--N废水具有良好的去除效果,NO3--N去除率达90%以上,出水水质稳定,可满足综合污水处理场接收要求.同时,工程采用高浓度废碱液作为碳源,含氨废水作为氮源,节约药剂投加成本,降低了装置运行费用.%The wastewater from catalyst production unit of a chemical plant contains a lot of nitrate nitrogen.The concentration of nitrate nitrogen in single wastewater reaches 1350 mg/L,which has affected the normal operation of the comprehensive wastewater treatment station.The wastewater with high-concentration nitrate nitrogen has been pretreated by anaerobic fluidized bed bioreactor in the workshop.The results from actual operation show that the process is suitable for treating chemical wastewater containing high-concentration nitrate nitrogen and the effluent quality is stable.The removal rate of nitrate nitrogen reached more than 90%,which could meet the acceptable requirements of the sewage treatment station of the company.At the same time,the high concentration waste lye was used as carbon source,and the Ammonia-containing wastewater was used as nitrogen source,which could save the reagent cost and reduce the operation cost of the device.