医院生活污水回用处理工艺的参数确定及工程应用效果

Parameter determination and engineering application of water reuse technology in hospital domestic sewage treatment

为使医院生活污水处理后满足出水回用的要求,针对医院生活污水特点,提出预处理+接触氧化+高效沉淀+过滤消毒工艺,通过小试试验确定其最佳工艺参数,并在天津市某专科医院生活污水升级改造工程中应用。小试试验的最佳工艺条件:容积负荷为0.50 kg/(m^3·d),pH控制在7.5~8.0,气水比为15∶1,联合投加PAC+PAM(PAC、PAM投加量分别为15.0、1.0 mg/L),ClO2投加量为12 mg/L。工程应用结果表明,工艺运行状况良好,处理后出水水质达到GB/T 18920—2002《城市污水再生利用城市杂用水水质》回用水冲厕水质要求。

In order to meet the requirements for water reuse after treatment of domestic sewage from the hospitals,the process of“pretreatment+bio-contact oxidation+high efficiency precipitation+filtration disinfection”was proposed according to the characteristics of domestic sewage from hospitals,and the optimal process conditions determined by a small trial test.The process was applied in the upgrading and transformation project of domestic sewage in a specialized hospital in Tianjin.The optimal process conditions were determined by the small trial test,i.e.volumetric load of 0.50 kg/(m^3·d),pH of 7.5-8.0,gas-water ratio of 15,the joint dosing of poly aluminum chloride and polyacrylamide(15.0,1.0 mg/L respectively)and ClO2 dosing of 12 mg/L.The engineering application results showed that the process was in good condition and the water quality of effluent reached the reuse water quality requirements for toilet flushing of Standard for Municipal Sewage Reuse,Municipal Mixed Water Quality(GB/T 18920-2002).