UASB+两级AO+MBR工艺处理高浓度原料药废水

Engineering Design of UASB,Two-stage AO,and MBR Process for Treating High Concentration API Wastewater

某原料药废水处理项目设计处理规模为1500 m^(3)/d,废水特点是高TDS、高COD、高TN、低pH,水质水量波动较大。根据方案研究并经小试验证,确定处理流程为pH调节+缓冲调节+UASB+两级AO+MBR。实际工程运行结果表明,对COD、氨氮和总氮的平均去除率分别为96.77%、96.89%和91.00%,系统处理出水水质可稳定达到并优于辽宁省《污水综合排放标准》(DB 21/1627—2008)中排入市政污水管线标准,直接处理费用约7.42元/m^(3)。

The treatment capacity of an API wastewater treatment project is 1500 m^(3)/d.The wastewater is characterized by high TDS,high COD,high TN,low pH,great fluctuation of water quality and quantity.According to the scheme study and small-scale test,the treatment scheme is determined as pH regulation,buffering regulation,UASB,two-stage AO,and MBR.The operation results of the project show that the average removal rates of COD,ammonia nitrogen and total nitrogen are 96.77%,96.89%and 91.00%respectively.The treated effluent of the system can stably reach and surpass the discharge criteria for draining into municipal sewage pipeline specified in the Integrated Wastewater Discharge Standard(DB 21/1627-2008)of Liaoning Province,and the direct wastewater treatment cost is about7.42 yuan/m^(3).