污水处理厂染整废水与生活污水分置混合处理工程实例

Engineering Example of Mixed Treatment Project of Dyeing and Finishing Wastewater and Domestic Wastewater in WWTP

山东某工业新区污水处理厂来水主要是纺织染整工业废水和生活污水,主体工艺路线为“工业废水预处理工艺+生活污水预处理工艺+混合污水处理工艺”;工业废水预处理工艺采用“厌氧罐+缺氧罐+曝气调节池+好氧池+初沉池+臭氧高级氧化池”处理,生活污水预处理工艺采用“粗格栅+提升泵站+细格栅+沉砂池”处理,纺织染整工业废水处理至《污水排入城镇下水道水质标准》(GB/T 31962—2015)A级标准之后,再与生活污水混合进行处理,混合污水(工业+生活)处理工艺采用“厌氧+缺氧+两级AO+MBR+臭氧接触氧化+消毒接触池”处理,连续运行12个月。实际数据证明,经处理后的出水水质可达《城镇污水处理厂污染物排放标准》(GB/T 18918—2002)中的一级A标准,就近排入园区柴汶河内。

The influent from a wastewater treatment plant(WWTP)in an industrial new district of Shandong is mainly textile dyeing and finishing industrial wastewater and domestic wastewater.The main process route is"industrial wastewater pretreatment process+domestic wastewater pretreatment process+mixed wastewater treatment process".Industrial wastewater pretreatment process adopts"anaerobic tank+hypoxia tank+aeration regulation tank+aerobic tank+primary sedimentation tank+ozone advanced oxidation tank"treatment,and domestic wastewater pretreatment process adopts"coarse grid+lifting pump station+fine grid+sedimentation tank"treatment.After the textile dyeing and finishing industrial wastewater is treated to the A level criteria of Wastewater Quality Standards for Discharge to Municipal Sewers(GB/T 31962-2015),it is then mixed with domestic wastewater for treatment.The mixed wastewater(industrial+domestic)treatment process adopts"anaerobic+hypoxia+two-stage AO+MBR+ozone contact oxidation+disinfection contact tank"for continuous operation for 12 months.The actual data prove that the treated effluent water quality can reach first A criteria in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB/T 18918-2002),and it is discharged into the Chaiwen River.