Department of Environmental Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark.
Department of Environmental Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark.
Bioresour Technol. 2018 Jan;247:380-386. doi: 10.1016/j.biortech.2017.09.097. Epub 2017 Sep 19.
Biogas upgrading to natural gas quality has been under focus the recent years for increasing the utilization potential of biogas. Conventional methods for CO removal are expensive and have environmental challenges, such as increased emissions of methane in the atmosphere with serious greenhouse impact. In this study, an innovative microbial electrochemical separation cell (MESC) was developed to in-situ separate and regenerate CO via alkali and acid regeneration. The MESC was tested under different applied voltages, inlet biogas rates and electrolyte concentrations. Pure biomethane was obtained at 1.2V, inlet biogas rate of 0.088mL/h/mL reactor and NaCl concentration of 100mM at a 5-day operation. Meanwhile, the organic matter of the domestic wastewater in the anode was almost completely removed at the end. The study demonstrated a new sustainable way to simultaneously upgrade biogas and treat wastewater which can be used as proof of concept for further investigation.
近年来，为了提高沼气的利用潜力，将沼气升级到天然气质量一直是研究的重点。传统的 CO 去除方法成本高昂，且存在环境挑战，例如在大气中增加甲烷排放，对温室效应造成严重影响。在这项研究中，开发了一种创新的微生物电化学分离电池（MESC），通过碱和酸再生原位分离和再生 CO。MESC 在不同的施加电压、进气沼气速率和电解质浓度下进行了测试。在 1.2V、进气沼气速率为 0.088mL/h/mL 反应器和 NaCl 浓度为 100mM 的条件下，经过 5 天的运行，获得了纯生物甲烷。同时，在实验结束时，阳极中的生活污水中的有机物几乎被完全去除。该研究展示了一种同时升级沼气和处理废水的可持续新方法，可作为进一步研究的概念验证。
