【摘要】 针对印染废水难以生物降解处理的特性,研究了高浓度退浆印染废水的强化混凝处理,同时探讨了其后续生物处理的工艺选择.实验结果表明,控制FeSO4∶SNM(阳离子絮凝剂)=35∶65、混凝剂总投加量为100 m g/L、pH在4.9~5.4范围条件下,对CODCr=2.62×103m g/L的退浆印染废水混凝处理时,CODCr去除率达38.0%、浊度去除率达99.17%.用聚合氯化铝/SNM复配絮凝剂对同一废水水样混凝处理时,最佳条件下得其CODCr去除率为30.0%、浊度去除率为98.64%.因此,FeSO4∶SNM=35∶65的复配絮凝剂及其混凝处理条件,更有利于退浆印染废水的强化混凝处理.比较分析退浆印染废水分别经由直接好氧、混凝-好氧和混凝-水解酸化-好氧联合工艺的处理结果,可知混凝-水解酸化-好氧联合工艺更加适用于高浓度退浆印染废水的处理.更多还原

【Abstract】 Intensified coagulation and the following biological process were applied to the decontamination of dye pollutants according to the biodegradability of dyeing waste water.The results showed 38.0% COD_Cr and 99.17% SS removal in the process of chemical coagulation process when FeSO₄∶cation polycoagulant（SNM）=35∶65,overall usage of coagulant=100 mg/L,and pH=4.9⁵.4.Meanwhile,the results of 30.0% COD_Cr and 98.64% SS were obtained by the same coagulation process of Poly（Aluminium Chloride）/SNM.It could be seen that the complex coagulants of FeSO₄ and cation polycoagulant（SNM） in the best conditions were more propitious to the coagulation process for dyeing waste water.And another compared data of aerobic technique,coagulation-aerobic combined technique and coagulation-hydrolysis acidification-aerobic combined technique showed that the last one was the best choice for the decontamination of dye pollutants.更多还原