厌氧氨氧化烟气脱硝工艺的探讨

发布时间：2018-08-25 16:56

【摘要】：以反硝化作用为基础的生物法烟气脱硝工艺具有脱硝效率较高、工艺设备简单、建设运行成本低等优点,但是也存在需要外加电子供体、释放温室气体(一氧化二氮)等问题。以厌氧氨氧化作用为基础开发的新型生物法烟气脱硝工艺有望解决以上问题。本文从氮素循环角度出发,指出了厌氧氨氧化作用和反硝化作用在生物脱硝方面具有相似性。以厌氧氨氧化的生化反应模型为依据,探讨了厌氧氨氧化烟气脱硝工艺的可行性,并提供了相应的事实依据。以传质和反应过程为基础,分析了厌氧氨氧化烟气脱硝工艺可能的实现途径和面临的关键问题。文中指出,利用厌氧氨氧化作用可将铵和一氧化氮转化为联氨,联氨进一步分解为氮气,从而实现烟气脱硝。考虑到烟气处理量大的特点,厌氧氨氧化烟气脱硝工艺的实现途径是先通过化学吸收将气相中的一氧化氮转移至液相,而后通过厌氧氨氧化反应实现氮素的脱除。厌氧氨氧化烟气脱硝工艺所面临的关键问题主要是相态转移问题和菌种培养问题,涉及化学吸收剂的选择和再生、脱氮菌群的协同培养等。
[Abstract]:The biological flue gas denitrification process based on denitrification has the advantages of high denitrification efficiency, simple process equipment, low construction cost and so on, but it also needs additional electron donors to release greenhouse gas (nitrous oxide) and so on. The new biological flue gas denitrification process based on anaerobic ammonia oxidation is expected to solve the above problems. In this paper, from the point of view of nitrogen cycling, it is pointed out that anaerobic ammonia oxidation and denitrification are similar in biological denitrification. Based on the biochemical reaction model of anaerobic ammonia oxidation, the feasibility of anaerobic ammonia oxidation flue gas denitrification process is discussed, and the corresponding factual basis is provided. Based on mass transfer and reaction process, the possible realization and key problems of anaerobic ammonia oxidation flue gas denitrification process were analyzed. It is pointed out that ammonium and nitric oxide can be converted to hydrazine by anaerobic ammonia oxidation, and hydrazine can be further decomposed into nitrogen, thus realizing flue gas denitrification. Considering the large amount of flue gas treatment, the way of anaerobic ammonia oxidation flue gas denitrification process is to transfer nitric oxide from gas phase to liquid phase by chemical absorption, and then to realize nitrogen removal by anaerobic ammonia oxidation reaction. The key problems of anaerobic ammonia oxidation flue gas denitrification process are mainly phase transfer and strain culture, including the selection and regeneration of chemical absorbent, the cooperative culture of denitrification bacteria, and so on.
【作者单位】：首都经济贸易大学安全与环境工程学院;首都经济贸易大学特大城市经济社会发展研究协同创新中心;
【基金】：首都经济贸易大学科研项目(2016XJQ001) 首都经济贸易大学2015年度科研启动基金成果(00891554410202) 北京市组织部优秀人才项目(2015000020124G090) 首都经济贸易大学特大城市经济社会发展研究协同创新中心项目(00891662740115)
【分类号】：X701

【相似文献】