PTA废水生化尾水深度处理的试验研究  

Test Studies on Advanced Treatment of Tail Water from Biological Treatment of PTA Wastewater

作　　者：曹蕾[1] 涂勇[1] 蒋永伟[1] 陆继来[1] 邹敏[1] 魏家泰[2] 

机构地区：[1]江苏省环境科学研究院江苏省环境工程重点实验室,江苏南京210036 [2]东南大学能源与环境学院,江苏南京210096

出　　处：《污染防治技术》2014年第5期27-31,共5页Pollution Control Technology

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07101-003);(2012ZX07101-005)

摘　　要：通过小试实验筛选出最经济的三种混凝剂,研究p H、温度、搅拌级数、搅拌强度GT和助凝剂PAM的投加量对三种混凝剂除磷脱色效果的影响,结果表明:PAC、Fe Cl3和硫酸铝的除磷效果较好,去除1 mg总磷时三种混凝剂的投加量分别为17.83、19.14、54.59 mg。p H对混凝剂的除磷脱色效果影响较大,出水中TP去除率随p H的增高而降低。Fe Cl3除磷脱色的最佳p H=7,PAC和硫酸铝的最佳p H=5。较高温度有利于PAC和硫酸铝的水解。在相同GT值条件下,3级串联机械搅拌反应的除磷效果优于2级串联,适当增加快速搅拌时间有利于混凝反应的进行,快速搅拌时间40 s^100 s时除磷效果达到最佳。混凝剂投加量、p H是影响混凝除磷效果的主要因素。Through a beaker test to screen the best coagulants,the effects of p H,temperature,stirring series,stirring intensity GT and the flocculating dosage to phosphorus removal and decolorization of three kinds of coagulants were analyzed in this paper.The results show that： The effects of phosphorus removal of Liquid PAC,liquid Fe Cl3 and Al2（SO4）3were relatively good,the three drug doses to remove 1mg TP were 17. 83 mg、19. 14 mg、54. 59 mg,respectively. The lower p H,caused higher TP removal rate,so the suitable p H of Fe Cl3 was p H 7,PAC and Al2（SO4）3were p H 5. Higher temperature was good for the hydrolysis reaction of PAC and Al2（SO4）3. Under the same GT,TP removal effeds in three sections were better than those in two sections. Suitable faster-mixing time was 40-100 s. The impacts of p H and drug dosage on phosphorus removal rate ware the major factors.

关 键 词：PTA废水 除磷 脱色 混凝剂 絮凝剂 

分 类 号：X5[环境科学与工程—环境工程]