完全自营养脱氮过程中的影响因素  

Influencing factors in completely autotrophic nitrogen removal process

作　　者：蔡庆[1] 张代钧[1,2] 肖芃颖[1] 姚宗豹[1] 卢培利[1,2] 

机构地区：[1]重庆大学环境科学系,重庆400030 [2]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400030

出　　处：《环境工程学报》2013年第10期3895-3900,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金项目(51078365);重庆大学研究生科技创新基金(CDJXS11240008)

摘　　要：基于正交实验考察了溶解氧(DO)、初始NH+4-N浓度、pH对SBR自营养脱氮性能的影响。结果表明,DO和NH+4-N浓度对好氧氨氧化速率影响大,pH对好氧氨氧化速率的影响小;DO、NH+4-N浓度对亚硝酸氧化速率的影响较大,pH对亚硝酸氧化速率的影响较小;DO、NH+4-N浓度和pH对厌氧氨氧化菌(ANAOB)的活性影响较小。好氧氨氧化菌(AOB)直接影响到CANON系统的总氮去除能力,是CANON系统的控制反应,DO是关键控制因子。实验确定的CANON系统优化运行条件为,DO(0.3±0.05)mg/L、初始NH+4-N浓度150 mg/L和pH 7.4。Orthogonal test method was used to investigate the effects of DO concentration, initial NH4＋-N concentration and pH on CANON （completely autotrophic nitrogen removal over nitrite） performance of SBR. The results indicated that DO and initial NH4 -N concentrations had significant effects on aerobic ammonium oxi- dation rate while the effect of pH was not significant ; DO and initial NH4 -N concentrations had significant effects on nitrite oxidation rate while the effect of pH was not significant ; DO, initial NH4＋ -N concentrations and pH had little effect on anaerobic ammonium oxidation rate. Aerobic ammonium oxidation, as controlling reaction of CAN- ON process, directly determined the system＇ s total nitrogen removal capacity, and DO concentration was the key factor. The optimal operating conditions of the CANON process were determined as follows ： the optimal DO con- centration of （0.3 ±0.05）mg/L, the optimal initial NH4＋ -N concentration of 150 mg/L and the optimal pH of 7.4.

关 键 词：好氧氨氧化 厌氧氨氧化 完全自营养脱氮 溶解氧 氨氮浓度pH 

分 类 号：X703.1[环境科学与工程—环境工程]