微絮凝-直接过滤工艺用于东江流域典型印染废水回用的实验研究

Experimental study on micro-flocculation/direct filtration process for advanced treatment of typical dyeing wastewater in Dongjiang area

以东莞地区某典型印染企业尾水为研究对象,针对东江流域饮用水源河流水质污染现状及纳污河流水质改善目标要求与企业对尾水回用的实际需求,进行了印染废水深度处理回用工艺的适用性研究。通过混凝烧杯实验,选用工业PACl、FeSO4、HPAC 3种药剂,对微絮凝-直接过滤集成工艺用于印染废水尾水深度处理后水质回用的可行性,进行了实验性验证和效能对比研究,并筛选出混凝剂HPAC为微絮凝-直接过滤工艺时的优选药剂。

With the serious situation of water pollution in the drinking water sources of Dongjiang river catchment area and for the target of water quality improvement in the drainage-taking river system,typical wastewater discharged from a local bleaching and dyeing mill of textile industry in Dongguan city was investigated on the treatability by the micro-flocculation/direct filtration combined process for water reuse purpose.Jar test was performed on the dyeing wastewater to optimize the coagulation conditions by using the three types of coagulants of industrial PACl,FeSO4 and HPAC and the micro-flocculation/direct filtration process was evaluated for the advanced treatment of dyeing wastewater.It comes to a conclusion that the micro-flocculation/direct filtration process proves to be feasible to the advanced treatment of dyeing wastewater for reuse purpose and HPAC is screened out as the best agent for the combined process.