低碳、高氮磷城市污水的化学辅助除磷研究  

Study on Supplemental Chemical Phosphorus Removal from Municipal Wastewater with Low Carbon and High Nitrogen and Phosphorus

作　　者：侯红娟[1] 王洪洋[1] 周琪[2] 

机构地区：[1]宝山钢铁股份有限公司环境与资源研究所,上海201900 [2]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《中国给水排水》2007年第11期24-27,共4页China Water & Wastewater

基　　金：国家高技术研究发展计划(863)项目(2002AA601023)

摘　　要：对于低碳、高氮磷的城市污水,可采用生物脱氮并辅助化学除磷的工艺进行处理,以使氮、磷同时达到排放标准。选择聚合硅酸铁作为混凝剂并将其直接投加到生物反应器中,结果表明,当投加量为12 mg/L(以Fe计)时出水中的TP<0.5 mg/L,达到了《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。所投加的聚合硅酸铁与进水中TP的物质的量之比同出水TP之间具有很好的相关性,因而在进、出水TP浓度一定的情况下,可据此确定混凝剂的投量。投加了混凝剂后,污泥絮体变得更密实,沉降性能良好。The process of biological nitrogen removal and supplemental chemical phosphorus removal can be used to treat municipal wastewater with low carbon and high nitrogen and phosphorus to satisfy the discharge standards for both nitrogen and phosphorus. Polyferric silicate was used as coagulant and dosed into the bioreactor. The results show that when the dosage is 12 mg/L （as Fe）, the effluent TP concentration is less than 0.5 mg/L, which achieves the class Ⅰ-A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （ GB 18918 - 2002 ）. There is a linear relation between the effluent TP and the molar ratio of the dosage of polyferric silicate to the influent TP. Therefore, the dosage of coagulant can be determined when the influent and effluent TP is known. The dosed polyferric silicate results in more compact sludge floc and favorable sludge settleability.

关 键 词：城市污水 C/N C/P 生物脱氮 化学除磷 

分 类 号：X703[环境科学与工程—环境工程]