氮和磷对生物滴滤塔净化煤矿乏风瓦斯的影响

发布时间：2019-05-05 20:05

【摘要】：研究了氮源类型和浓度以及磷元素浓度对生物滴滤塔净化极低浓度CH4的影响。利用空气和高纯CH4混合气模拟煤矿乏风瓦斯,生物滴滤塔填料为陶瓷鲍尔环,以实验室分离筛选到的甲烷氧化菌进行接种挂膜。结果表明,进气流量为2 L?min?1,喷淋液流量为0.1 L?min?1,进气CH4浓度在0.1%~1.1%,以Na NO3为氮源时,生物滴滤塔净化CH4的效果最好,优于(NH4)2SO4和NH4NO3为氮源时的表现。喷淋液中Na NO3浓度为70 mmol?L?1,进气CH4浓度为0.1%~1.1%时,生物滴滤塔的CH4去除负荷为10.67~39.72 g?m?3?h?1,去除负荷随CH4浓度增加而增加;CH4净化率为97.92%~39.70%,净化率随CH4浓度增加而下降。在最佳氮源条件下,进气CH4浓度为0.9%,P元素浓度为100 mmol?L?1时,滴滤塔CH4去除负荷最大为49.69 g?m?3?h?1,CH4净化率60.90%。
[Abstract]:The effects of nitrogen source type and concentration and phosphorus concentration on the purification of very low concentration CH4 in bio-trickling filter were studied. The mixture of air and high-purity CH4 was used to simulate the exhausted gas in coal mine, and the bio-trickling filter column was filled with ceramic Bauer ring. The methane oxide bacteria isolated in the laboratory were inoculated and attached to the film. The results show that when the influent flow rate is 2 L / min / 1, the flow rate of spray liquid is 0.1 L / min / 1, the concentration of CH4 is 0.1% / 1%, and the nitrogen source is Na NO3, the bio-trickling filter has the best effect on the purification of CH4. Better than (NH4) 2SO4 and NH4NO3 as nitrogen source. When the concentration of Na NO3 in spray solution is 70 mmol?L?1, the concentration of CH4 in air is 0.1% ~ 1.1%, the CH4 removal load of biotrickling filter is 10.67 ~ 39.72 g / kg / h ~ (- 1), and the removal load increases with the increase of CH4 concentration. The purification rate of CH4 was 97.92% / 39.70% and decreased with the increase of CH4 concentration. Under the optimum nitrogen source condition, the CH4 removal load of drip filter column is 49.69 g / m / 3 h / 1, and the removal rate of Ch _ 4 is 60.90% when the concentration of CH4 is 0.9% and the concentration of P element is 100 mmol?L? / 1. The removal load of CH4 is 49.69 g / m / h 路h ~ (- 1).
【作者单位】：中国矿业大学化工学院;中国矿业大学煤炭加工与高效洁净利用教育部重点实验室;
【基金】：国家重点基础研究发展计划项目(2012CB214900) 国家自然科学基金(51274199) 中央高校基本科研业务费专项资金资助项目(2014QNB13)
【分类号】：TD712

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