摘要：

比较了无机高分子絮凝剂聚合硫酸铁(PFS)、聚合氯化铝(PAC)和聚氯硫酸铁(PFCS)在废水处理中的混凝吸附性能,并对絮凝剂的混凝机理进行了初步探讨。研究结果表明,在使用量相同的情况下,聚铁的絮凝性能明显优于聚铝,经改性后的PFCS使用的pH范围更宽,混凝除浊效果更好。在选定的实验条件下,经砂滤、絮凝、活性炭吸附处理后,水样中COD_Cr、浊度、色度和SS的去除率均在80%以上,出水可达到国家污水综合排放标准。

关键词: 聚合硫酸铁, 聚合氯化铝, 聚氯硫酸铁, 改性, 絮凝性能

Abstract:

The coagulation characteristics of inorganic polymer flocculants PFS,PAC and PFCS are compared and the flocculating mechanism in wastewater treatment is discussed.The experimental results show that the coagulat-ion characteristic of PFS has a great advantage over PAC with the same dosage,and modified flocculant PFCS is better than PFS and PAC in terms of removing turbidity and pH adaptability.The removal rate of COD_Cr,turbidity,chromaticity and SS are above80%when the wastewater was processed through sand filtering,coagulation and activated carbon absorption under optimum conditions.The treated water can be up to national integrated wastewater discharge standard.

Key words: polyferric sulfate, polyaluminium chloride, polychloride ferric sulfate, modification, flocculating efficiency

中图分类号: 

• X703.5