改性硅藻土的多级A/O工艺除磷优化及尾水深度除磷  

Optimization of Phosphorus Removal from Multistage A/O Process with Modified Diatomite and Advanced Treatment of Phosphorus Removal in Tail Water

作　　者：马翠[1] 何争光[1] 张碧晰 

机构地区：[1]郑州大学水利与环境学院,河南郑州450001

出　　处：《华侨大学学报（自然科学版）》2015年第1期55-59,共5页Journal of Huaqiao University(Natural Science)

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07204-001-02-01)

摘　　要：硅藻土经过酸洗提纯,加入聚合氯化铝、氯化铁进行表面结构改性.用改性硅藻土处理多级A/O工艺二沉池出水,研究了不同投加量、停留时间、搅拌转速对尾水中磷去除的影响.试验结果表明:在投加量为500mg·L-1,停留时间为1.5h,机械搅拌转速为12r·min-1时,出水总磷小于0.5mg·L-1,达到了一级A的排放标准.After acid purification,the diatomite was modified with the mixture of PAC and ferric chloride by surface structure method.The effects of modified diatomite dosage,retention time,and the mechanical stirring speed on the phosphorus removal from tail water were investigated using the modified diatomite to treat the effluent after multistage A/O process.The results showed that the optimal dosage was 500 mg·L-1 ,the hydraulic retention time was 1.5 h,and the optimum mechanical stirring speed was 12 r·min-1 .In this case,the total phosphorus in the effluent was less than 0.5 mg·L-1 ,and reached the emission standard of A.

关 键 词：改性硅藻土 多级 A/O 工艺 深度处理 除磷 尾水 

分 类 号：X703[环境科学与工程—环境工程]