一体化复合式生物反应器的脱氮研究

Study on Nitrogen Removal by Integrative Hybrid Bioreactor

利用自制的一体式缺氧／好氧（A／O）复合式生物反应（HBR），对高浓度氨氮废水进行了脱氮研究．结果表明，当进水COD浓度在950-1100mg·L^-1、氨氮浓度增加到150mg·L^-1时系统COD、氨氮去除率开始下降，在好氧区内检测到大量的NO2^-—N积累，表明HBR的脱氮作用部分是通过短程硝化-反硝化途径实现的．且复合式生物反应器填料内部存在多种多样的微环境类型以及缺氧／好氧内循环，造成反应器缺氧、好氧区都发生了同步硝化-反硝化反应．

Continuous treatment of high-loaded ammonia nitrogen wastewater was carried out by a self-made integrative anoxic/oxic hybrid bioreactor. The results showed that when the influent COD concentration was in the range of 950-1100 mg · L^-1 , the removal decreased as ammonia nitrogen concentration was above 150 mg · L^-1. Much nitrite could be found in the oxic section, thus the removal of nitrogen by hybrid bioreactor was achieved partly through short-cut nitrification-denitrification. And the biological environment of carrier in hybrid biological reactor was various and the characteristic of anoxic/oxic section harmonized with each other by circulation, accordingly conduced to the phenomenon of simultaneous nitrification-denitrification in both anoxic and oxic section.