【摘要】 废旧塑料回收加工过程产生大量废水,其SS、COD、BOD5浓度均较高,但沉降性和可生化性较好,可以采用混凝沉淀/曝气生物滤池工艺处理,混凝剂PAC投量为200 mg/L,设计负荷为2.5 kgBOD5/(m3滤料.d)。运行结果表明,该处理工艺具有占地少、效率高、启动快、投资省、能耗低、运行管理方便等特点,在不加混凝剂的情况下出水水质达到《污水综合排放标准》(GB8978—1996)一级标准,加混凝剂后出水各项指标达到《生活杂用水水质标准》(CJ 25.1—89)。更多还原

【Abstract】 A large amount of wastewater is produced during waste plastics processing.The SS,COD and BOD5 concentrations in the wastewater are higher,but its settle ability and biodegradability are good.The coagulating sedimentation/biological aerated filter process is used to treat this kind of wastewater.PAC dosage is 200 mg/L,design load is 2.5 kgBOD5/(m3 filtering medium·d).The running result shows that this process has the characteristics of small land area occupied,high efficiency,rapid start-up,small investment,low energy consumption,convenient operation management etc.The effluent quality can meet the first class criteria specified in Integrated Wastewater Discharge Standard(GB 8978-1996) when coagulant is not added,and if coagulant is used,all indexes in the effluent can meet the requirements of Miscellaneous Domestic Wastewater Quality Standard(CJ 25.1-1989).更多还原