利用第二缺氧段硝酸盐氮浓度作为MUCT工艺运行控制参数  

Control for MUCT Process Operation Using Nitrate Concentration in the Secondary Anoxic Zone

作　　者：王晓玲[1,2] 尹军[2] 高尚[1] 

机构地区：[1]吉林建筑工程学院市政与环境工程学院,长春130021 [2]吉林建筑工程学院水污染控制与资源化利用吉林省重点实验室,长春130021

出　　处：《环境科学》2012年第1期175-180,共6页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07207-005);吉林建筑工程学院青年科技发展基金项目(J2009862069)

摘　　要：以模拟生活污水为对象考察了第二缺氧段硝酸盐氮质量浓度(SNO-3)作为MUCT工艺运行控制参数的可行性.将进水COD质量浓度恒定为(290±10)mg.L-1,TN质量浓度恒定为(55±0.5)mg.L-1,TP质量浓度恒定为(7.0±0.5)mg.L-1,改变第二缺氧段硝酸盐氮质量浓度以比较各段出水TN和TP质量浓度.结果表明,SNO-3值显著影响着出水TN和TP质量浓度,控制内循环回流量维持SNO-3为2.5 mg.L-1,可实现MUCT工艺的最优控制.利用各段硝酸盐氮和TP平均质量浓度进行的物料平衡计算结果表明SNO-3是影响厌氧段释磷量、第一缺氧段和第二缺氧段硝酸盐氮反应量、第二缺氧段吸磷量的重要参数.The feasibility of the control for MUCT process operation using nitrate concentration in the secondary anoxic zone were investigated by using simulative domestic sewage, in which the influent chemical oxygen demand concentration was stabilized at （290±10） mg·L-1, the influent total nitrogen （TN） concentration was stabilized at （55±0.5） mg·L-1, the influent total phosphorus （TP） concentration was stabilized at （7.0±0.5） mg·L-1. The nitrate concentration in the secondary anoxic zone was changed to compare the effluent total nitrogen and total phosphorus concentration. The results indicated that,effluent total nitrogen and total phosphorus concentration significantly were affected by SNO3-, controlling nitrate recirculation flow keeping SNO3- in 2.5 mg·L-1 can realize MUCT process as the optimal control for nitrogen and phosphorus removal. The TP and NO3--N mass balances were performed around each zone and settling tank based on the averaged TP and TN concentrations for each nitrate concentration in the secondary anoxic zone, which was indicated that SNO3- is a key factor determining the mass of phosphorus which is released in anaerobic zone, mass of phosphorus uptake in the secondary anoxic zone, and mass of NO3--N which is denitrified in the first and secondary anoxic zone.

关 键 词：MUCT工艺 缺氧吸磷 反硝化聚磷菌 第二缺氧段硝酸盐氮浓度 物料平衡 

分 类 号：X703[环境科学与工程—环境工程]