中文摘要：

利用经学吸收-生物还原处理烟气中NOx的方法对模拟烟气中O2和CO2影响因子进行了系统的研究．结果表明，50℃时，尽管在模拟烟气中O2体积分数从0增加到5％，吸收液的溶解氧浓度升高至0．85mg／L，造成有效吸收液成分Fe（Ⅱ）EDTA（EDTA：乙二胺四乙酸）浓度有所下降，但由于生物还原的作用，使得Fe（Ⅱ）EDTA可以有效再生，系统NO去除效率从95％降低到90％，仍维持在较高的水平；烟气中的CO2能缓冲吸收液的pH值，使pH维持在6．5～7．0，从而有利于脱硝系统的连续运行；对脱硝装置处理负荷的考察证实了O2体积分数的增加会降低系统的生物还原负荷速率．

英文摘要：

The influences of O2 and CO2 in simulative flue gas on NO removal efficiency by chemical absorption-microbial reduction integrated approach were investigated. The results indicated that the dissolved oxygen in absorption solution was up to 0.85 mg/L as O2 volume ratio from 0 to 5%, which resulting in decrease of the concentration of active Fe（Ⅱ）EDTA（EDTA： ethylenediaminetetraacetate） at 50℃. But the NO removal efficiency just decreased from 95% to 90% because Fe（Ⅱ）EDTA could be regenerated effectively in virtue of microbial reduction. CO2 in flue gas could buffer the pH value of absorption solution between 6.5 and 7.0, which was beneficial to the continuous running efficiency of the NO removal system. The examination of the treatment load of the NO removal equipment confirmed that the biological reduction loading rate would fall when O2 volume ratio of input gas increased.