【摘要】 构建了新型气升式一体化A/O生物膜反应器用于生活污水的脱氮处理,考察了进水碳氮比和曝气速率对反应器硝化和反硝化的影响.试验结果表明,一定曝气速率条件下,反应器硝化效果随着进水碳氮比的提高而下降;提高曝气速率可以增加反应器好氧区和缓冲区的DO浓度,降低有机物氧化对硝化作用的影响;低进水碳氮比条件下,进水中的有机碳源能在缺氧区作为反硝化反应的电子供体被有效利用;在进水TN负荷为0.01 kg/(m3.d)、有机物负荷为0.26~0.76 kg/(m3.d)、进水碳氮比为2.7~5.3条件下,反应器COD和TN去除率分别达到96.0%和80.0%.更多还原

【Abstract】 A novel airlift combined A/O biofilm reactor used for wastewater nitrogen removal was developed and the influence of influent ratio of carbon to nitrogen and aeration rate on nitrification and denitrification was studied.The experimental results demonstrate that nitrification efficiency drops with the increase of influent ratio of carbon to nitrogen.Increasing the aeration rate can improve the DO concentration in the aerobic and buffering zone and decrease the impact of organic carbon oxidization on nitrification.Organic carbon source can effectively be utilized as the electron donor of denitrification action in anaerobic zone under the conditon of low influent ratio of carbon to nitrogen.About 96.0% of COD and 80.0% of nitrogen removal are achieved when the influent nitrogen loading is 0.01 kg/(m3·d),organic carbon loading is 0.26~0.76 kg/(m3·d) and influent ratio of carbon to nitrogen is 2.7~5.3.更多还原