Effects of Nitrate Concentration in Main Anoxic Zone on Denitrifying Dephosphatation

作     者：尹军 王晓玲 祝贵兵 叶龙 吴相会 

作者机构：School of Municipal and Environmental EngineeringHarbin Institute of Technology School of Municipal and Environmental EngineeringJilin Architectural and Civil Engineering Institute State Key Laboratory of Environmental Aquatic ChemistryResearch Center for Eco-Environmental SciencesChinese Academy of Sciences 

出 版 物：《Journal of Donghua University(English Edition)》 (东华大学学报（英文版）)

年 卷 期：2009年第26卷第4期

页      面：443-449页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 09[农学] 0902[农学-园艺学] 090202[农学-蔬菜学] 

基　　金：Water Pollution Control and Management of Science and Technology Majon Projects (No.2008ZX07207005) The Programs for Development of Science and Technology of Jilin Province of China (No.20071105) 

主　　题：MUCT process denitri fying de phosphatation nitrate concentration anoxic phosphorus uptake 

摘      要：The effects of nitrate concentration in the main anoxic zone on denitrifying dephosphatation capability were conducted based on modified University of Cape Town （MUCT） process. Meanwhile the relation between optimal nitrate concentration （Nopt） and influent C/N ratio was evaluated, in which the influont chemical oxygen demand （COD） concentration was stabilized at （2905：10）mg/L, the influent total phosphorus （TP） concentration was stabilized at （7.0±0. 5）mg/L. The results indicated that： （1） the nitrate concentration in the main anoxic zone had an effect on denitrifying dephosphatation capability, and the average percentages of anoxic phosphorus uptake in total phosphorus uptake （ηa） increased with nitrate cancentration increasing, i.e., increasing from 62.1% at2.0 mg/L to63.7%, 65.6%, 68.1%, and 72.3% at 2.2, 2.4, 2.6 and 2.8mg/L, respectively; （2） the Nopt as function of influent C/N ratio could be calculated by the equation： y = 0.67x^2-7.79x ＋ 22. 21; the maximum percentages of anoxic phosphorus uptake in total phosphorus uptake （ηa,max） as function of the Nopt could be calculated by the equation： y=0.77-0.33e^-（x/1.52）. The Nopt was the important control parameter that must be optimized for operation of conveational biological nutrieat removal activated sludge （BNRAS） system.