厌氧-好氧-物化组合工艺处理木薯淀粉废水

摘要

采用厌氧-好氧法处理木薯淀粉废水。废水处理规模为2000m3/d,厌氧停留5h,好氧为8h。COD为12000～15000 mg/L,BOD为7200～9000 mg/L,SS为4500～5500 mg/L,色度50倍,pH值为3.5的木薯淀粉废水,经工艺处理后,出水的COD为55～73mg/L,BOD为10～12 mg/L,SS为27～28 mg/L,色度为20,pH值为7.5～7.6,主要指标达到《污水综合排放标准》（GB8978-1996）一级排放标准。%In the thesis,anaerobic-aerobic process was used for cassava starch wastewater treatment（2000m3/d）.The hydraulic retention time of anaerobic process and aerobic process are 5h and 8h,respectively.Results showed,after treatment,the chroma decreases from 50 to 20;pH value increase from 3.5 to 7.5～7.6;COD,BOD and SS of influent decrease from 12000～15000mg/L,7200～10000mg/L,4500～5500mg/L to 55～73mg/L,10～12mg/L,27～28mg/L,respectively.The main indexes of effluent meet the First Grade of Integrated Wastewater Discharge Standard（GB8978-1996）.