BACF技术处理印染废水工程实例

Engineering example of BACF process for treating printing and dyeing wastewater

针对江苏省某印染园区污水处理厂原有工艺流程长、运行成本高等问题,采用曝气生物再生活性炭滤池技术为核心的处理工艺进行改造。运行结果表明,该工艺出水COD、TN、NH_(3)-N及TP分别为58 mg/L、8.8 mg/L、0.9 mg/L和0.3 mg/L,出水水质达到了《太湖地区城镇污水处理厂及重点工业行业主要水污染物排放限值》(DB 32/1072-2018)表3标准,悬浮物(SS)及色度也达到了相关行业标准《纺织染整工业水污染物排放标准》(GB 4287-2012)表2标准。同时,与原工艺相比,该工艺大幅缩短了工艺流程,减少了约50%的占地面积,节省了约50%的运行成本,年节约运行成本1600万元。

The biological activated carbon filter(BACF)treatment process was adopted in a printing and dyeing park sewage treatment plant in Jiangsu province in response to the problems of long process and high operating costs.The operation results over 3 years show that the COD,TN,NH_(3)-N and TP in the effluent can reach 58 mg/L,8.8 mg/L,0.9 mg/L and 0.3 mg/L,respectively,and the effluent quality meets the Discharge standard of main water pollutants for municipal wastewater treatment plant&key industries of Taihu Area(DB 32/1072-2018)Table 3,and the suspended solids(SS)and Chroma also meet the Discharge standards of water pollutants for dyeing and finishing of textile industry(GB 4287-2012)Table 2.Compared to the original process,the technique can significantly shorten the technological process,reduce about 50%of the land occupation,save about 50%of the operating costs,and save an annual operating cost of 16 million yuan.