二沉池强化沉淀对污水处理系统稳定性的影响  

Impact of Enhanced Settlement in the Secondary Sedimentation Tank on the Stability of Sewage Treatment System

作　　者：彭喜林 诸力维 刘晓 张楷彬 PENG Xi-lin;ZHU Li-wei;LIU Xiao;ZHANG Kai-bin(Chongqing Three Gorges Yufii Drainage Co.Ltd.?Chongqing 401133,China)

机构地区：[1]重庆市三峡鱼复排水有限责任公司,重庆401133

出　　处：《中国给水排水》2021年第10期111-115,共5页China Water & Wastewater

摘　　要：针对二沉池出水悬浮物(SS)较高,下一级过滤工艺高负荷运行,出水SS触及指标预警值高频出现的问题,在二沉池投加聚丙烯酰胺(PAM)进行强化沉淀,提升了二沉池的处理效率和出水水质稳定性。PAM不同投加量对聚合氯化铝(PAC)投加量、二沉池运行情况影响的分析表明,在一定范围内,用于强化沉淀的PAM投加量越大,出水SS、TP越稳定,且PAC投加量较低,总体药耗降低,化学产泥量减少对整体产泥率降低贡献较大。Aiming at the problems such as high effluent suspended solids(SS) in the secondary sedimentation tank, high-load operation of the next filtration process, high frequency of effluent SS reaching the indicator warning value, polyacrylamids(PAM) were added to the secondary sedimentation tank to enhance the settlement. As a result, the treatment efficiency of the secondary sedimentation tank and the stability of the effluent quality are improved. According to the analysis of the effect of different PAM dosages on poly aluminum chloride(PAC) dosage and the operation of secondary sedimentation tank, the greater the PAM dosage within a certain range for enhanced settlement resulting in the more stable the effluent SS and TP, the lower PAC dosage and overall chemical consumption. Thus the reduction of chemical sludge production has a greater contribution to the overall reduction of sludge production rate.

关 键 词：二沉池 强化沉淀 聚丙烯酰胺 化学污泥 

分 类 号：TU992.3[建筑科学—市政工程]