摘要
为考察不同的碳源对缺氧反硝化效率的影响,分析污水处理厂沉积池中反硝化过程的反硝化速率。研究结果表明:反硝化反应分3个阶段:第一阶段(0～60 min),运用了可快速迚行生物降解的碳源;第二阶段(60～370 min),已经基本消耗完毕可生物降解的溶解性有机物;第三阶段(370～530 min),NO_3-N的降解速度继续减缓。SCOD与COD的浓度的变化觃律和NO_3-N浓度变化觃律相似。反硝化速率各阶段反应时间变化与NO3-N浓度呈线性关系,因此根据多段动力学方程得到三阶段的反硝化速率。随着时间的不断增加,反硝化速率逐渐减小。
In order to investigate the influence of different carbon sources on the efficiency of anoxic denitrification,the denitrification rate during the denitrification process in the sedimentary pond of sewage treatment plant was analyzed. The results showed that the denitrification reaction was divided into three stages: in the first stage of 0~60 min, the biodegradable carbon source was used quickly;in the second stage of 60 ~ 370 min, dissolved organic matter that can be biodegradable was basically consumed. In the third stage of 370 ~ 530 min, the degradation rate of NO3-N continued to slow down. The variation trend of SCOD and COD concentration was similar to that of NO3-N concentration. The change of denitrification rate at each stage was linearly related to NO3-N concentration, so the denitrification rate at three stages was obtained according to the multi-stage kinetic equation. As the time went on, the denitrification rate decreased gradually.
作者
邓茗濂
DENG Ming-Han(College of Resources and Environment, Chengdu University of Information Technology, Sichuan Chengdu 610225, China)
出处
《当代化工》
CAS
2019年第3期508-511,共4页
Contemporary Chemical Industry
关键词
污水处理
沉积池
反硝化
速率
Sewage treatment
Sedimentation pool
Denitrification
Rate
