摘要
在SBR短程硝化系统处理高氨氮污水过程中,探讨了温度、pH和DO对短程硝化的影响。实验发现,温度升高可以促进短程硝化实现,当温度在30℃时,短程硝化系统的稳定性能良好,NH4+-N的去除率和NO2--N的积累率均达到了最佳值。适宜的pH有益于NH4+-N的去除和NO2--N的积累,当pH为8.5时,系统的NO2--N积累率较好。DO浓度会影响系统中AOB和NOB的生长平衡,当DO处于0.7~0.9mg/L时,系统内AOB的生长形成优势,NO2--N积累率最高,短程硝化效果最佳。
The effects of temperature,pH and DO on high strength ammonia wastewater treatment by shortcut nitrification processing in a sequencing batch reactor(SBR) were studied.The results suggest that increasing the temperature can promote the shortcut nitrification.The best NH4+-N removal rate and NO2--N accumulation rate were observed when the temperature was 30 °C.Suitable pH was beneficial for ammonia nitrogen removal and nitrite accumulation,and the best NO2--N accumulation was found at pH 8.5.The dissolved oxygen(DO) concentration was important for the growth balance of am-ammonium oxidation bacteria(AOB) and nitrite oxidation bacteria(NOB).A best shortcut nitrification with the highest nitrite accumulation of 80% and the dominant populations of AOB was obtained when DO concentration was 0.7~0.9 mg/L.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第S1期5-9,59,共6页
Environmental Science & Technology
基金
国家水体污染控制与治理科技重大专项(2013ZX07202)
中国博士后科学基金(2012M510832)
关键词
SBR
短程硝化
温度
PH
DO
高氨氮废水
SBR
shortcut nitrification
temperature
pH
DO
high strength ammonia wastewater
