Abstract: The secondary effluent of Dadukou Wastewater Treatment Plant in Chongqing has been investigated. The effects of the dosage of self-made polymeric aluminum ferric sulfate (PAFS), and initial pH of water body on the re-moving effectiveness of total phosphorus(TP) and ammonia nitrogen(NH₃-N) from the secondary effluent in the wastewater treatment plant are studied. The research results show that when the mass concentration of PAFS is 13 mg/L, the residual TP mass concentration is 0.094 mg/L, the first class A wastewater discharge standard can be reached. Meanwhile NH₃-N removing rate reaches 24.8%. Compared with PAFC, PAC and PFS which are sold in markets, PAFC has higher coagulation effectiveness, and lower dosages. Furthermore, PAFC has stronger charge neutralization and adsorption bridging capacities.

Key words: polymeric aluminum ferric sulfate, coagulation, secondary effluent, domestic sewage

摘要： 以重庆大渡口污水处理厂的二级出水为考察对象，研究了自制聚合硫酸铝铁（PAFS）投加量、水体初始pH对污水处理厂二级出水的TP、NH₃-N去除效果的影响。研究表明：当PAFS投加质量浓度为13 mg/L时，剩余TP质量浓度为0.094 mg/L，达到污水排放一级A标准，同时NH₃-N去除率为24.8%。与市售混凝剂PAFC、PAC、PFS相比，PAFS具有较好的混凝效果和较低的投加量，同时PAFS还具有更强的电荷中和和吸附架桥能力。

关键词: 聚合硫酸铁铝, 混凝, 二级出水, 生活污水

CLC Number: 

• X703