水解+A/O+混凝沉淀处理丙烯腈-腈纶废水

摘要

Hydrolysis+A/O+coagulation and sedimentation process has been used for treating acrylonitrile-acrylic fibre wastewater. When the influent COD concentration is below 850 mg/L,and HRT of hydrolysis tank and A/O system are more than 15 h and 65 h,respectively, the COD,NH3-N and SCN-concentration of the biologically treated effluents are less than 150 mg/L, 10 mg/L and 0.5 mg/L,respectively. The effluent COD concentration ,after being treated by coagulation sedimentation,is below 100 mg/L, and the cost of coagulant per ton is less than CNY 2.4.%采用水解+A/O+混凝沉淀工艺对丙烯腈-腈纶生产废水进行处理,进水COD<850mg/L,水解停留时间>15h,A/O停留时间65h时,生物处理出水COD<150mg/L,NH3-N<10mg/L;SCN-<0.5 mg/L;经混凝沉淀处理后COD<100mg/L,吨水药剂费用<2.4元.