固定化甲烷氧化菌去除沼气升级过程中废气中的甲烷。
Elimination of methane in exhaust gas from biogas upgrading process by immobilized methane-oxidizing bacteria.
机构信息
State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong Province 266510, PR China; Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong Province 266101, PR China.
State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong Province 266510, PR China.
出版信息
Bioresour Technol. 2017 May;231:124-128. doi: 10.1016/j.biortech.2017.01.020. Epub 2017 Jan 13.
Biogas upgrading is essential for the comprehensive utilization of biogas as substitute of natural gas. However, the methane in the biogas can be fully recovered during the upgrading process of biogas, and the exhaust gas produced during biogas upgrading may contain a very low concentration of methane. If the exhaust gas with low concentration methane releases to atmosphere, it will be harmful to environment. In addition, the utilization of large amounts of digestate produced from biogas plant is another important issue for the development of biogas industry. In this study, solid digestate was used to produce active carbon, which was subsequently used as immobilized material for methane-oxidizing bacteria (MOB) in biofilter. Biofilter with MOB immobilized on active carbon was used to eliminate the methane in exhaust gas from biogas upgrading process. Results showed porous active carbon was successfully made from solid digestate. The final methane elimination capacity of immobilized MOB reached about 0.13molhm, which was more 4 times higher than that of MOB without immobilization.
沼气升级对于沼气作为天然气替代品的综合利用至关重要。然而，沼气中的甲烷可以在沼气升级过程中被完全回收，并且沼气升级过程中产生的废气可能含有非常低浓度的甲烷。如果低浓度甲烷的废气释放到大气中，将会对环境造成危害。此外，沼气厂产生的大量消化残渣的利用是沼气产业发展的另一个重要问题。在本研究中，使用固体消化残渣生产活性炭，然后将其用作生物滤池中甲烷氧化菌（MOB）的固定化材料。使用固定化 MOB 的生物滤池用于消除沼气升级过程中废气中的甲烷。结果表明，成功地从固体消化残渣中制备出了多孔活性炭。固定化 MOB 的最终甲烷去除能力达到约 0.13molhm，比未固定化的 MOB 高约 4 倍。
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