环境工程学报2017，Vol.11Issue(5)：2660-2665,6.DOI:10.12030/j.cjee.201512155
pH和硝化细菌浓度对氨氮氧化速率的影响
Effects of pH level and nitrifying bacteria concentration on ammonia oxidation rate
摘要
Abstract
To promote the ammonia oxidation rate,the nitrifying bacteria community was enriched in a miniature fermenter by sequence batch processing using the activated sludge taken from the A2/O process of a wastewater treatment plant as the seed sludge.The effects of different levels of free ammonia (FA) at varying pHs on the ammonia oxidation rate,nitrite accumulation,and nitrate production were evaluated.The effects of nitrifying bacterial concentration on the efficiency of ammonia oxidation were also assessed.The results showed that a suitable pH level was crucial to increase the ammonia oxidation rate with a certain initial ammonia concentration,and a relatively high nitrifying bacteria concentration was necessary to improve the ammonia oxidation performance substantially.FISH analysis showed that ammonia-oxidizing and nitrite-oxidizing bacteria were the predominant bacterial groups in the selectively enriched sludge.关键词
硝化细菌菌群/氨氮氧化速率/pH/游离氨(FA)/硝化细菌浓度Key words
nitrifying bacteria community/ammonia oxidation rate/pH/free ammonia (FA)/nitrifying bacteria concentration分类
资源环境引用本文复制引用
杨宏,姚仁达..pH和硝化细菌浓度对氨氮氧化速率的影响[J].环境工程学报,2017,11(5):2660-2665,6.基金项目
北京市教育委员会市属高校创新能力提升计划项目(PXM2016_014204_500040) （PXM2016_014204_500040）
