摘要
采用多段AO+MBR工艺处理实际煤化工废水。将两段AO设计成OAAO形式,一段O池对BOD_5去除率为80%,有效解决了MBR回流污泥中大量溶解氧对A池的冲击与A段反硝化对碳源的需求问题。在某煤化工项目中,当进水COD为400~600 mg/L,在一级O池污泥负荷设计为0.08 kgBOD_5/(kgMLSS·d)、一级A池设计反硝化速率为0.044 kgNO_3^--N/(kgMLSS·d)、二级O池污泥负荷设计为0.08 kgBOD_5/(kgMLSS·d)、二级A池设计反硝化速率为0.029 kgNO_3^--N/(kgMLSS·d)、MBR的通量设计为12 L/(m^2·h)时,COD去除率>95%,氨氮去除率>99%,出水SS<1.5 mg/L。
The multistage AO/MBR process was used to treat coal chemical industry wastewater. The two-stage AO was designed to be a OAAO form, the removal rate of BOD in the first-stage O tank was 80%, which could effectively solve the impact of dissolved oxygen of MBR return sludge on A tank and the demand for carbon source in denitrification of A tank. In a coal chemical industry project, when the influent COD was 400 to 600 mg/L, the removal rates of COD and NH3 - N were more than 95% and 99%, respectively, and the effluent SS was less than 1.5 mg/L under the conditions as follows： the sludge load rate of 0.08 kgBOD5/（kgMLSS · d） in the first-stage O tank, the denitrification rate of 0. 044 kgNO3- - N/（ kgMLSS · d） in the first-stage A tank, the sludge load rate of 0.08 kgBODJ （ kgMLSS· d） in the second-stage O tank, the denitrification rate of 0. 029 kgNO3- - N/（ k in the second-stage A tank, and the flux of 12 L/（m2 · h） in the MBR.
作者
罗瑞春
郭慧枝
常明
罗茜
刘军
LUO Rui-chun GUO Hui-zhi CHANG Ming LUO Qian LIU Jun(Poten Environment Group Co. Ltd., Xi＇ an 710065, China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2017年第4期71-74,共4页
China Water & Wastewater
关键词
煤化工废水
多段AO
MBR
反硝化
碳源
coal chemical industry wastewater
multistage AO process
MBR
denitrifica-tion
carbon source
