聚合硅酸盐混凝剂在污水深度处理中的应用研究  

Application of polysilicate coagulant in sewage advanced treatment

作　　者：何江通 朱群华 周秀秀[3] 刘畅[3] 

机构地区：[1]广州中滔环境研究院有限公司,广州510006 [2]广东省重工建筑设计院有限公司,广州510670 [3]环境保护部华南环境科学研究所,广州510655

出　　处：《工业用水与废水》2018年第1期12-15,23,共5页Industrial Water & Wastewater

基　　金：国家"水体污染控制与治理"重大科技专项(2012ZX07206-002)

摘　　要：通过复合法制备了几种不同金属离子配比的聚合硅酸盐混凝剂,对比了聚合硅酸盐混凝剂与常规混凝剂在处理城镇污水厂尾水时,深度除磷、除浊和去除COD_(Cr)的性能。结果表明,聚硅酸铝铁的n(Al):n(Fe)=1:1时,较其他配比的混凝剂对总磷的去除率高,而且聚硅酸铝铁(n(Al):n(Fe)=1:1)比聚硅酸镁铁(n(Mg):n(Fe)=1:1)和氯化铁的混凝效果和沉降性能均更好。在聚硅酸铝铁(n(Al):n(Fe)=1:1)投加量为60 mg/L时,总磷的质量浓度为0.96 mg/L、COD_(Cr)的质量浓度为32 mg/L的城镇污水厂尾水处理后水质可达到GB 3838—2002《地表水环境质量标准》中Ⅲ类标准。Polysilicate coagulants with several kinds of metal irons ratios were prepared by composition.The performance of polysilicate coagulants and conventional coagulants on advanced removal of phosphorus, turbidity and CODCrwhen treating tail water of municipal sewage treatment plant were compared. The results showed that, among polysilicate aluminium ferric(n(Al): n(Fe) = 1: 1), poly ferric magniesum silicate(n(Mg): n(Fe) =1 : 1) and ferric chloride, the polysilicate aluminum ferric(n(Al) : n(Fe) = 1 : 1) could get the highest total phosphorus removal rate, and its coagulation effect and sedimentation effect were also the best. Using polysilicate aluminium ferric(n(Al) : n(Fe) = 1 : 1) to treat municipal wastewater treatment plant tail water which contains0.96 mg/L of total phosphorus and 32 mg/L of CODCr, when the coagulant dosage was 60 mg/L, the quality of the effluent water reached the requirement of grade Ⅲ in GB 3838—2002 Environmental Quality Standards for Surface Water.

关 键 词：深度处理 混凝剂 聚硅酸铝铁 聚硅酸镁铁 

分 类 号：X703.5[环境科学与工程—环境工程]