摘要
控制SBR反应器内的温度为20-23℃，采用两段式曝气的方法，经过80个周期的运行，实现了生活污水的短程硝化，对氨氮的平均去除率为88．49％，亚硝态氮积累率达到90％以上。在反应器运行过程中，DO和pH值曲线都有很好的变化特征点，可以通过其指示氨氮降解过程的结束。系统的有效污泥龄从23．91d缩短为21．3ld，结合硝化时间的缩短和亚硝态氮积累率的提高，推断这可能是由于亚硝酸盐氧化茵（NOB）等世代周期较长的细菌被淘洗或活性受到了抑制，而氨氧化茵（AOB）等世代周期较短的细菌得到富集造成的。
The sequencing batch reactor was operated under the temperature of 20 to 23℃. After 80 operation cycles, the partial nitrification of domestic sewage was achieved by using a two-stage aera- tion. The average removal rate of ammonia nitrogen was 88.49%, and the accumulation rate of nitrite was more than 90%. In the progress of the operation, the variation of dissolved oxygen （DO） and pH had several feature points, the changes of the two parameters could indicate the end of the degradation of ammonia nitrogen. In the activated sludge system, the efficient sludge age was reduced from 23.91 d to 21.31 d. As the nitrification time was shortened and the accumulation rate of nitrite was increased, it might be caused by the discharge of longer generation bacteria like nitrite oxidizing bacteria （NOB） or in- hibition of their activity while the enrichment of shorter generation bacteria like ammonia oxidizing bacteria （AOB）.
出处
《中国给水排水》
CAS
CSCD
北大核心
2016年第1期35-38,43,共5页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2014ZX07201-011)
关键词
短程硝化
两段式曝气
溶解氧
硝化时间
partial nitrification
two-stage aeration
dissolved oxygen
nitrification time
