Department of Chemical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea.
Centre for Innovation and Translational Research, CSIR-Indian Institute of Toxicology Research, Lucknow 226 001, India.
Bioresour Technol. 2019 Jun;281:474-479. doi: 10.1016/j.biortech.2019.02.115. Epub 2019 Feb 25.
A thermophilic bioelectrochemical system was operated with mixed culture at 60 °C, while introducing only carbon dioxide. Methane production was initially observed in a membrane-less single chamber without a mediator, but eventually acetate was also found as 10.5 g/L after 137 days of operation. Comparing the microbial communities before and after the electricity supply using next-generation sequencing technology, acetoclastic methanogens such as Methanosaeta concilii were increased, and this result also indicates the production of acetate in bioelectrochemical CO conversion system. With the advent of sulfate-reducing bacteria, Desulfotomaculum peckii was considered to be an acetate production promoter. These high production results for both methane and acetate can be applied to CO storage using excess electricity for value-added chemicals.
采用混合培养物在 60°C 下运行嗜热生物电化学系统，同时仅引入二氧化碳。在没有介体的无膜单室中最初观察到甲烷生成，但在 137 天的运行后最终也发现了 10.5 g/L 的乙酸盐。使用下一代测序技术比较供电前后的微生物群落，发现产乙酸甲烷菌如 Methanosaeta concilii 增加了，这一结果也表明在生物电化学 CO 转化系统中产生了乙酸盐。随着硫酸盐还原菌的出现，被认为是乙酸盐生产促进剂的 Desulfotomaculum peckii。这些甲烷和乙酸盐的高产率可应用于利用多余电力储存 CO 以生产增值化学品。
