摘要
采用倒置A2/O工艺处理生活污水中的氮,研究进水C/N、溶解氧、回流比这三个因素对倒置A2/O工艺脱氮效果的影响;分析好氧段、缺氧段、厌氧段各阶段,总氮、氨氮、硝酸盐氮、亚硝酸盐氮的转化情况,以确定实现最佳脱氮的效果。结果表明:最佳进水C/N比为400,好氧段溶解氧为2.0mg/L,污泥回流比为75rad时,脱氮效果最好。通过对不同格室氮形态的研究表明,亚硝酸盐主要在缺氧段去除,而在厌氧段和好氧段出现了亚硝酸盐的累积;对于氨氮的去除主要发生在好氧段,其去除率可占到总去除率的70%以上。
To study the nitrogen removal characteristics of Inverted A2/O process, the C/N, dissolved oxy- gen,a reflux ratio were researched, analysis the aerobic, anoxic, anaerobic various stages of segments to study the total nitrogen, ammonia, nitrate, nitrite nitrogen transformation. The results showed： influent C/N ratio of 400, aerobic oxygen to 2. 0mg/L, sludge reflux ratio 75rad can remove more nitrogen. Through the study of different forms of nitrogen showed： mainly in the anoxic nitrite removal in anaerobic and aerobic appeared accumulation of nitrite; for ammonia removal occurs mainly in the aerobic segment, which removal can account for more than 70 % of the total removal.
出处
《四川化工》
CAS
2014年第4期54-57,共4页
Sichuan Chemical Industry
