聚合硫酸铁聚丙烯酰胺絮凝效果与优化

Flocculation Effect and Optimization of Polyacrylate with Polymer Iron Sulfate

摘要: 聚合硫酸铁是20世纪70年代由国外开发的一种新型无机高分子絮凝剂，作为污水处理的主要药剂，与常用的混凝剂聚合氯化铁、硫酸铝及聚合氯化铝相比，它有着许多明显的优点。在进行污水处理过程中生成的矾花大、沉降快，对某些重金属离子及COD、色度、恶臭等均有显著的去除效果，并且聚合硫酸铁溶液对设备的腐蚀性更小。基于这些，采用分光光度法通过观察污水的清澈度和测定污水中磷酸盐及COD的含量，研究了聚合硫酸铁、不同相对分子质量聚丙烯酰胺以及二者一起使用用于污水的絮凝效果和除磷效果。结果表明，对本文的污水来说聚合硫酸铁和聚丙烯酰胺一起使用的絮凝效果和污染物去除率更优于二者单独使用的效果，且聚丙烯酰胺的相对分子质量越大，其絮凝效果越好。该结果也为日后污水处理的成本优化打下了一定的基础。

Abstract: Polyferric sulfate is a new type of inorganic polymer flocculant developed by foreign countries in 1970s. As the main agent of wastewater treatment, it has many obvious advantages compared with common coagulants such as polyferric chloride, aluminum sulfate and polyaluminum chloride. In the process of wastewater treatment, the alum produced is large and settles quickly. It has significant removal effect on some heavy metal ions, COD, chroma and odor, and the corrosion of PFS solution to the equipment is less. Based on these, the flocculation effect and phosphorus removal effect of PFS, PAM with different molecular weight and the combination of PFS and PAM were studied by observing the clarity of wastewater and determining the contents of phosphate and COD in wastewater by spectrophotometry. The results show that the flocculation effect and pollutant removal rate of PFS and PAM are better than those of PFS and PAM alone, and the bigger the molecular weight of PAM is, the better the flocculation effect is. The results also lay a foundation for the cost optimization of sewage treatment in the future.