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

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.