【摘要】 选取混凝法对焦化废水进行了处理.采用正交设计的方法考察了絮凝剂种类、投加量、絮凝时间和pH值对处理水色度、浊度和CODcr的影响,并对几种混凝剂的组合应用作了进一步的研究.结果表明,混凝剂的投加量和pH值对CODcr的去除影响差异极显著(P<0.01);混凝剂种类对浊度的去除影响差异极显著(P<0.01);当硫酸铁投加量为500 mg/L和聚丙烯酰胺(PAM)投加量为1 mg/L时,在pH值8.5,絮凝时间15 min的条件下,处理后的焦化废水CODcr和浊度可分别降低22%和97%以上.更多还原

【Abstract】 Coagulation was used to treat the coking wastewater.The effects of coagulation types,dosage,flocculation time and pH on chrominance,turbidity and CODcr of the treated water were studied by using the orthogonal design.Moreover,the combined application of several coagulant was further investigated.The results showed that for CODcr,factors of pH and dosage on the coagulation effects was higher significant,while for turbidity,factors of coagulant types on the coagulation effects was higher significant.The best removal rate was achieved when coagulant was ferric sulfate with a dosage of 500 mg/L,PAM dosage of 1 mg/L and flocculation time for 15 min at pH of 8.5.CODcr and turbidity of the treated coking wasterwater have decreased more than 22% and 97% respectively.更多还原