Study on Removing Nitric Oxide from Waste Gas by Nitrification Using Bio-trickling Filter

2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring Pub Date : 2011-04-11 DOI:10.1109/CDCIEM.2011.311

Li Zhifei, Pang Dehong, A. Yufa

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Abstract

The activated sludge from the nitrification section of secondary settling tank in municipal sewage treatment plant is cultured to obtain the nitrobacteria and then inoculates them to the columnar activated carbon in the bio-tricking filter to remove nitric oxide from waste gas. The test studies the effect of the pH of circulating fluid, the circulating fluid flow rate, the empty bed residence time, the inlet NO concentration and organic carbon source on the removal efficiency. The results show that the optimum pH of circulating fluid is 7.5, while the removal efficiency of NO can reach the best. The smaller inlet gas flow and the lower inlet NO concentration, the better the removal efficiency will be. In the experimental range, the circulating fluid flow has an effect on the bio-tricking filter¡¯sremoval efficiency and the most suitable range of circulating fluid flow rate is 0.05~0.10L/h. After the addition of organic carbon source, the removal efficiency of NO increases.

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生物滴滤池硝化去除废气中一氧化氮的研究

将城市污水处理厂二沉池硝化段的活性污泥进行培养，得到硝化细菌，然后将其接种到生物滤池的柱状活性炭上，去除废气中的一氧化氮。试验研究了循环液pH、循环液流量、空床停留时间、进口NO浓度和有机碳源对去除率的影响。结果表明，循环液的最佳pH为7.5时，对NO的去除率达到最佳。入口气体流量越小，入口NO浓度越低，去除率越好。在实验范围内，循环流体流量对生物滤除效率有影响，最适宜的循环流体流量范围为0.05~0.10L/h。添加有机碳源后，对NO的去除率提高。

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2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring

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