磁混凝—FBSC组合工艺在城市黑臭水体治理中的应用

Application of magnetic coagulation and FBSC process for treatment of urban black and odorous water

福州市琴亭河黑臭水体治理中,针对大水量、短期内难溯源实现清污分离的暗涵出水,采用磁混凝-FBSC(固定床生物海绵填料工艺)组合工艺进行分散式处理,处理后的尾水直接补充河道,达到活水提质的目的。该工艺投产运行后,COD、BOD5和氨氮去除率分别达到71.4%、81.1%和95.2%,出水主要水质指标稳定达到《地表水环境质量标准》(GB 3838-2002)地表Ⅴ类标准。

The combined process of magnetic coagulation and FBSC(Fixed bed bio-sponge carries) was adopted in dispersive treatment of the hidden culvert effluent which is massive and difficult to find source on the black-odorous water-Qinting River. The treated water was discharged into the river directly to improve the quality of live water. After operation,the removal rates of COD, BOD5 and ammonia nitrogen achieved 71.4%, 81.1% and 95.2% respectively. The main indexes of the treated water could met level Ⅴ stipulated in Environmental quality standards of surface water(GB 3838-2002).