In-situ removal of H2S from chicken manure biogas by injecting air
SONG Yun-long, Ahmed Mahdy, QIAO Wei, DONG Ren-jie
Research&Development Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development and Reform Committee, College of Engineering, China Agricultural University, Beijing 100083, China
Biogas from chicken manure with anaerobic digestion has a high concentration of H2S, which needs to be removed before further utilization such as power generation or purification to produce bio-natural gas. A batch experiment of chicken manure digestion was carried out in this study, and trace amount of air was introduced into the reactors to remove hydrogen sulfide by biological oxidation. The test was carried out by feeding the inoculum obtained from the effluent of chicken manure methane digestion reactor under mesophilic conditions, and introducing air at level of 7~50mL/g VS. Air introduction significantly reduces the H2S concentration in the biogas. The experimental group with an air dosage of 30mL/g VS had the highest average desulfurization efficiency of 62%. At the same time, the cumulative methane production of the experimental group with an air dosage of 30mL/gVS reached 335mL/gVS, which was 78.6% higher than the control group. The biological desulfurization method with trace amount of oxygen has the application prospect of simple procedure and efficient removal of H2S.
宋云龙, Ahmed Mahdy, 乔玮, 董仁杰. 空气注入原位去除鸡粪发酵沼气中H2S[J]. 中国环境科学, 2020, 40(2): 688-694.
SONG Yun-long, Ahmed Mahdy, QIAO Wei, DONG Ren-jie. In-situ removal of H2S from chicken manure biogas by injecting air. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(2): 688-694.
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