| 有氧条件下生物滤塔去除NOx的挂膜启动及研究 |
| 摘要点击 2773 全文点击 2241 修订日期：2010-09-20 |
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| 中文关键词 生物法废气净化技术 好氧反硝化 硝化 生物过滤 氮氧化物 |
| 英文关键词 biological technology of waste gas aerobic denitrification nitrification biofiltration nitrogen oxides |
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| 中文摘要 |
| 将优选后的好氧反硝化菌应用于生物过滤系统，用来脱除NOx模拟废气，研究了生物滤床在好氧条件下对NOx的处理效果和不同操作条件下的运行情况，并对NOx去除过程的作用机制进行了探讨.结果表明，生物滤塔经过26 d完成挂膜启动，该工艺系统能有效克服氧对反硝化菌活性的抑制作用，可实现对NOx的高效率脱除.NOx净化主要发生在滤塔中、下层，在O2体积分数为10%、NOx进气浓度为286.4 mg/m3、EBRT为59 s时，NOx净化效率能够达到93.6%.在生物过滤系统中形成了特有的硝化菌、兼性反硝化菌和好氧反硝化菌生物膜体系. |
| 英文摘要 |
| An optimized aerobic denitrifying bacteria was applied to a biofilter for the removal of NOx. The removal process of NOx was investigated, and the relationship between environmental factors and NOx removal efficiency as well as the NOx transfermechanism under aerobic conditions are discussed. The results show that the biofilter finished start-up after 26 days and the presence of oxygen has no evident negative effect on the efficiency of NOx removal. Mainly happening at the middle and under part of the biofiltration system, the removal of NOx get a high efficiency of 93.6% at the EBRT of 59s and the inlet NOxconcentration of 286.4 mg/m3 with 10% O2. A special biomembrane system was formulated by nitrobacteria, facultative denitrifying bacteria and aerobic denitrifying bacteria in the biofiltration system. |
