好氧颗粒污泥处理低氨氮废水短程硝化研究

Study on shortcut nitrification in treatment of wasterwater with low concentration of ammonia nitrogen by aerobic granular sludge

采用现有的好氧颗粒污泥,通过在序批式反应器(sequencing batch reactor,SBR)中接种颗粒污泥,基于人工模拟废水,研究好氧颗粒污泥处理低氨氮污水,实现短程硝化。结果表明,短程硝化效果受到有机物浓度、pH、氨氮浓度、排水比等因素的影响,当SBR反应器进水NH_(4)^(+)-N浓度为55mg/L左右时,NH_(4)^(+)-N去除率达到97.1%,亚硝酸盐氮积累率(Nitrite Accumulation Rate,NAR)达到95%,TN去除率达到35%以上,表明SBR反应器能够实现稳定的短程硝化效果。

Aerobic granular sludge existing treats artificial low ammonia wastewater in the sequencing batch reac⁃tor(SBR),the shortcut nitrification of aerobic granular sludge treating low ammonia wastewater was studied.The re⁃sults show that the shortcut nitrification efficiency was affected by organic matter concentration,pH,ammonia-nitro⁃gen concentration and drainage ratio,when the influent NH_(4)^(+)-N was about 55mg/L,the NH_(4)^(+)-N removal rate was 97.1%,the nitrite accumulation rate(NAR)was 95%,the TN removal rate was more than 35%,the results indicate that stable shortcut nitrification was achieved in SBR reactor.