摘要
通过采用限制DO的运行方式,在A2/O系统中富集NO2--N,从而强化厌氧氨氧化(ANAMMOX)反应,提高系统的脱氮性能。结果表明,当好氧池中的DO为0.5～1.0mg/L时,可使NO2--N的浓度提高约500%,形成有效积累,从而在缺氧池中强化ANAMMOX反应;强化AN-AMMOX反应后的缺氧池对NH4+-N和TN的去除率分别提高了15%和9%,系统对TN的去除率提高了约7%;通过SPSS13.0软件分析可知,强化ANAMMOX反应的A2/O系统脱氮效果显著;但采用限制DO的运行方式对A2/O系统去除COD和TP有一定影响,其中对COD的去除率下降了5%,对TP的去除率下降了1.4%。
The mode of lowering DO in the aerobic tank was used to accumulate NO2^- - N for enhancing ANAMMOX reaction in the anoxic tank, thus improving the nitrogen removal efficiency of A^2/O process. The results show that the concentration of NO2- - N is increased by 500% when DO concentration is 0.5 to 1.0 mg/L in the aerobic tank. The effective accumulation of NO2^- - N is formed, and AN- AMMOX reaction is enhanced. The removal rates of NH4 - N and TN in the anoxic tank are improved by 15% and 9% respectively. The removal rate of TN in the whole system is improved by 7%. It is known through the software analysis of SPSS13.0 that the nitrogen removal efficiency of A^2/O process with ANAMMOX enhancement reaction is remarkable. However, lowering DO has negative influence on the removal of COD and TP, and the removal rates of COD and TP are decreased by 5% and 1.4% respectively.
出处
《中国给水排水》
CAS
CSCD
北大核心
2009年第3期7-10,共4页
China Water & Wastewater
基金
上海市建委2007年重大科技攻关项目(建科2007-007)
