Effects of biofilter media depth and moisture content on removal of gases from a swine barn

文献类型： 外文期刊

第一作者： Liu, Tongshuai

作者： Liu, Tongshuai;Dong, Hongmin;Zhu, Zhiping;Shang, Bin;Yin, Fubin;Zhang, Wanqin;Zhou, Tanlong;Liu, Tongshuai;Dong, Hongmin;Zhu, Zhiping;Shang, Bin;Yin, Fubin;Zhang, Wanqin;Zhou, Tanlong

作者机构：

期刊名称：JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION （ 影响因子：2.235； 五年影响因子：2.906 ）

ISSN： 1096-2247

年卷期： 2017 年 67 卷 12 期

页码：

收录情况： SCI

摘要： Media depth (MD) and moisture content (MC) are two important factors that greatly influence biofilter performance. The purpose of this study was to investigate the combined effect of MC and MD on removing ammonia (NH3), hydrogen sulfide (H2S), and nitrous oxide (N2O) from swine barns. Biofiltration performance of different MDs and MCs in combination based on a mixed medium of wood chips and compost was monitored. A 3 x 3 factorial design was adopted, which included three levels of the two factors (MC: 45%, 55%, and 67% [wet basis]; MD: 0.17, 0.33, and 0.50 m). Results indicated that high MC and MD could improve NH3 removal efficiency, but increase outlet N2O concentration. When MC was 67%, the average NH3 removal efficiency of three MDs (0.17, 0.33, and, 0.50 m) ranged from 77.4% to 78.7%; the range of average H2S removal efficiency dropped from 68.1-90.0% (1-34 days of the test period) to 36.8-63.7% (35-58 days of the test period); and the average outlet N2O concentration increased by 25.5-60.1%. When MC was 55%, the average removal efficiency of NH3, H2S, and N2O for treatment with 0.33 m MD was 72.8 +/- 5.9%, 70.9 +/- 13.3%, and -18.9 +/- 8.1%, respectively; and the average removal efficiency of NH3, H2S, and N2O for treatment with 0.50 m MD was 77.7 +/- 4.2%, 65.8 +/- 13.7%, and -24.5 +/- 12.1%, respectively. When MC was 45%, the highest average NH3 reduction efficiency among three MDs was 60.7% for 0.5 m MD, and the average N2O removal efficiency for three MDs ranged from -18.8% to -12.7%. In addition, the pressure drop of 0.33 m MD was significantly lower than that of 0.50 m MD (p < 0.05). To obtain high mitigation of NH3 and H2S and avoid elevated emission of N2O and large pressure drop, 0.33 m MD at 55% MC is recommended.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序