SBR反应器内短程硝化系统快速启动及影响因素研究

探讨了采用序批式反应器(SBR)快速启动自养短程硝化系统的方法,研究了溶解氧(DO)、pH、温度、外加有机碳源对自养短程消化系统的影响。以硝化污泥接种反应器(SBR),在纯自养条件下利用高浓度溶解氧1.0～1.6mg/L和中温(35±1)℃达到亚硝酸氮的快速积累。结果表明,在进水氨氮浓度为280～300mg/L,HRT为12h,控制pH值为7.5～8.5、温度在(28±1)℃、溶解氧浓度为0.8～1.2mg/L条件下,氨氮去除率达到90%以上,亚硝酸氮积累率高达95%。试验证明投加有机碳源(COD)50mg/L左右时,不会对短程硝化系统产生影响,且能实现较高氨氮去除率和稳定的亚硝酸氮积累率。

Startup and Factors Affecting of Partial Nitrification in Sequencing Batch Reactor

Autotrophic shortcut nitrification process startup was studied to treat wastewater with high ammonia concentration using sequencing batch reactor(SBR). Effect of DO concentration,pH,temperature and carbon source on the nitrite accumulation rate was investigated respectively. The reactor was inoculated with nitrifying sludge and partial nitrification realized by using complete autotrophic bacteria. Nitrite accumulation was completed in DO concentration of 1.0～1.6mg/L and temperature of (35±1)℃. Results showed that more than 90% of ammonium removal efficiency and 95% of nitrite accumulation rate could be achieved when inflow ammonium concentration range was 280～300mg/L with reaction condition controlled as HRT at 12h,pH 7.5～8.5,temperature(28±1)℃ and DO concentration at 0.8～1.2mg/L.With addition of COD as carbon source and control to 50mg/L,nitrite accumulation rate and ammonium removal rate will be perfectly stable.