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.
出处
《环境工程学报》
CAS
CSCD
北大核心
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)
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
aerobic ammonium oxidation
anaerobic ammonium oxidation
completely autotrophic nitrogenremoval
dissolved oxygen
ammonium concentration
pH
