常温下pH对短程硝化反硝化的影响  

Study on the Shortcut Nitrification Process under Low DO and High pH Condition in Normal Temperature

作　　者：傅金祥[1] 韩晋英[1] 齐建华 韩汝佳[1] 徐岩岩[1] 王利平[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]中国核电工程有限公司河北分公司,河北石家庄105021

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第2期316-320,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省教育厅重点实验室基金项目(20060692);沈阳建筑大学市政与环境省级重点实验室开放基金项目(HJ-200603)

摘　　要：目的解决对短程硝化过程影响因素pH值研究不充分及短程硝化过程中氮的缺失的问题.方法在SBR反应器中用传统活性污泥作为种泥驯化污泥,以模拟生活污水为处理对象进行动态实验,考察pH值对系统短程硝化反硝化的影响及系统运行周期内总氮缺失原因.结果pH=8.5,6h的氨氮转化速率为8.9mg/(L.h),亚硝态氮积累率高达93%;亚硝酸盐氮积累率随反应时间逐渐降低,pH越低,下降越多,pH=7.1时,从2h的80%下降到6h的75%;进水pH值越高,反硝化2h时总氮的去除效率越高,pH=8.5时,系统总氮的降解速率达到5.6mg/(L.h);短程硝化过程中存在氮的缺失现象.结论进水pH越高,氨氮降解速率、亚硝态氮积累率和总氮去除率越高,系统周期中氮的缺失主要是同步硝化反硝化作用的结果.In order to solve the problem that short-cut nitrification effects factors pH did not fully-studied and nitrogen deficiency in shortcut nitrification process, this paper uses the traditional activated sludge as a kind of domesticated mud sludge in the SBR reactor, and with simulated domestic wastewater as treatment object, the effects of pH in shortcut nitrification and denitrification were investigated, and the causes of nitrogen deficiency during system＇s operation cycle were also discussed. The results showed that pH = 8.5,6 h, the degradation speed rate of ammonia-nitrogen is 8.9 mg/（ L- h） and NO2 - N accumulation rates are 93 %, NO2 -N accumulation rates is reduced as time goes on, the smaller, the most, pH = 7. 1,2 h is 80%, and 6 h is 75 %. The removal rate of TN is high with the inlet pH becoming high. When pH = 8.5, the degradation speed rate of TN is 5.6 mg/（ L. h）. In system cycle nitrogen loss occurs in shortcut nitrification process. The conclusion is that the degradation speed rate of ammonia-nitrogen and TN and NO2 - N accumulation rates are higher with the higher inlet pH. In system cycle period, nitrogen loss mainly caused by denitrification, that is,the system appeared simultaneous with the nitrification and denitrification when short-cut nitrification occurred.

关 键 词：短程硝化 反硝化 PH值 氨氮转化速率 

分 类 号：TU991.2[建筑科学—市政工程]