外排富磷污水的化学固磷与磷回收潜能  

Performance of ERP-SBR Process for Chemical Phosphorus Removal and Recovery by Discharging Anaerobic Phosphorus-rich Sewage

作　　者：左宁[1] 吉芳英[2] 

机构地区：[1]重庆交通大学重庆西南水运工程科学研究所,重庆400016 [2]重庆大学城市建设与环境工程学院,重庆400045

出　　处：《中国给水排水》2011年第19期100-104,共5页China Water & Wastewater

摘　　要：ERP/SBR工艺通过聚磷菌的生物富集作用,将含低浓度磷酸盐的城市污水转化为高浓度厌氧富磷污水,采用排富磷污水化学固磷技术替代传统排富磷污泥除磷模式,可以减少污水处理系统的剩余污泥产生量。与城市污水直接化学除磷系统相比,削减了化学处理污水总量,只需要将相当于进水总量10%的富磷污水进行化学固磷处理,化学除磷药剂用量小于直接处理低磷污水系统的8%,药剂利用率提高6.5倍,且产生的化学污泥含磷量高达17%,可直接作为磷资源回收利用,磷的回收率可达65%。The municipal sewage with low-concentration phosphate is converted to high-concentra- tion phosphorus-rich sewage via bio-concentration in ERP-SBR. The chemical phosphorus removal technology via discharging phosphorus-rich sewage instead of the traditional phosphorus removal mode via discharging phosphorus-rich sludge can reduce excess sludge yield of sewage treatment system. Compared with the direct chemical phosphorus removal system, this technology can reduce the total sewage volume of chemical treatment. The phosphorus-rich sewage for chemical phosphorus removal is only corresponds to 10% of the total influent volume. The dosage of chemicals for phosphorus-rich sewage treatment is less than 8% of that for low phosphorus sewage treatment, with the utilization rate of chemicals of 6.5 times. The phosphorus content in the chemical sludge is 17%, and as a resource, the recovery rate of phosphorus can be up to 65%.

关 键 词：厌氧富磷污水 剩余污泥 化学除磷 药剂用量 磷回收 

分 类 号：X703[环境科学与工程—环境工程]