城市污水厂化学除磷精确控制技术研究与工程示范  

Research and Demonstration on Precise Control Technology for Chemical Phosphorus Removal in Urban Sewage Treatment Plant

作　　者：马伟芳[1,2] 郭浩[2] 姜杰[1] 韩冬梅[2] 聂超[1] 姚志军 

机构地区：[1]北京林业大学环境科学与工程学院,北京100083 [2]北京市可持续发展促进会,北京100084 [3]吴家村污水处理厂,北京100161

出　　处：《中国给水排水》2014年第5期92-95,共4页China Water & Wastewater

基　　金：北京市科技计划项目(Z111100058911003)

摘　　要：针对污水处理厂化学除磷加药基本无自动控制系统,普遍采用固定加药量,导致过量投加化学除磷药剂的状况,研究了投药量系数β与出水总磷的关系、化学除磷加药量预测模型、药剂投加反馈调节系统,以实现化学除磷精确控制。结果表明,在β值为2.0、3.83、3.80和3.02时,聚合硫酸铁(PFS)、液态聚合氯化铝铁(LPAFC)、聚合氯化铝(PAC)、聚合硅酸铝铁(PAFSI)的除磷率分别达到78.99%、75.61%、70.03%和60.11%;在北京市吴家村污水处理厂建立了集RTU(远程终端控制系统,用于采集进出口污水的在线总磷值)、计算机分析、PLC控制加药变频器和专家后反馈的化学除磷精确控制系统,示范工程运行一个月约节约投药量20%。At present, sewage treatment plants in China have no automatic control system for chemical phosphorus removal. A fixed amount of chemicals is used, which results in excessive use of chemicals for phosphorus removal. In order to achieve precise control for chemical phosphorus removal, the relationship between dosage coefficient/3 and total phosphorus, the prediction model for chemical phosphorus removal dosage, and the chemicals dosage feedback regulation system were studied. The resuhs showed that the phosphorus removal rates for PFS, LPAFC, PAC and PAFSI were 78. 99%, 75.61% , 70.03% and 60.11% when β values were 2.0, 3.83,3.80 and 3.02, respectively. In Wujiacun WWTP, a precise control system combining online phosphorus monitoring, computer analysis, chemicals dosage inverter controlled by PLC and expert feedback was constructed. During a one-month demonstration project, the chemicals consumption saving was 20%.

关 键 词：化学除磷 精确控制 投药量 

分 类 号：X703[环境科学与工程—环境工程]