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中文摘要：
为研究反应器内的微生物种群关系,以强化污水脱N处理,本试验采用上流式曝气生物滤池,以生活污水为原水,在水力负荷、pH值以及溶解氧（DO）方面对微生物进行生化反应和结构优化的影响情况进行了研究.试验结果表明,污染物负荷对2级滤池的种群竞争具有重要作用,适当地控制负荷可使反应器在各自的优化状态下运行.pH＜8.5对维持长时间短程硝化可行性不大,但是控制ρ（DO）＜1.8 mg/L,在一定负荷时,利用在较低的ρ（DO）条件下氨氧化菌的比增殖速率比亚硝酸盐氧化菌的比增殖速率高的特点,亚硝酸盐积累率可以达到84%,有利于短程硝化反硝化反应器的工艺设计.
英文摘要：
In order to study the relationship of microorganisms in bioreactor and enhance nitrogen removal, influence of pH, dissolved oxygen and applied loading on biochemical reaction and population optimizing were studied. The experimental results show that controlling loading could make two stage filters operated at the optimized conditions respectively due to population competition. Maintaining long time shortcut nitrification is not likely to be feasible when the pH value is below 8.5. Nevertheless, utilizing the characteristic that specific growth rate of ammonia oxidizer is higher than nitrite oxidizer at low dissolved oxygen concentrations, the nitrite accumulation could be up to 84 % at the certain loading if the concentration of dissolved oxygen in the system is controlled below 1.8 mg/L. It is beneficial to the design of the shortcut nitrification-denitrification reactors.
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