Univ Lyon, INSA Lyon, DEEP, EA7429, 69621 Villeurbanne, France; ENOSIS, 31100 Toulouse, France.
Univ Lyon, INSA Lyon, DEEP, EA7429, 69621 Villeurbanne, France.
Bioresour Technol. 2023 May;376:128936. doi: 10.1016/j.biortech.2023.128936. Epub 2023 Mar 21.
Syngas biomethanation is a promising technology for waste to energy conversion. However, it had not yet been tested at high syngas flow rates. The aim of this study was to assess the possibility for syngas biomethanation to reach high methane productivity at higher syngas inflow rate. A pressurized stirred column was implemented. The syngas inflow rate was gradually increased, and two different increase strategies were compared. The highest methane productivity achieved yet with syngas-biomethanation was obtained, with 23.2 L/L/d, with high conversion efficiencies of 89% for H and 82% for CO. The mass transfer performances of the process were investigated, and the existence of a biological enhancement factor was observed. Considering an enhancement factor in bioprocesses is a pioneering concept that could change the way we design bioreactor to improve mass transfer. The high methane productivity obtained in this study paves the way for the process industrialization.
合成气生物甲烷化是一种有前途的废物能源转化技术。然而，它尚未在高合成气流速下进行测试。本研究旨在评估在更高的合成气流速下实现高甲烷产率的可能性。采用加压搅拌柱。逐渐增加合成气的进气量，并比较了两种不同的增加策略。获得了迄今为止最高的甲烷产率，为 23.2 L/L/d，H 和 CO 的转化率分别高达 89%和 82%。研究了该过程的传质性能，并观察到存在生物增强因子。考虑到在生物过程中存在增强因子是一个开创性的概念，它可能改变我们设计生物反应器以改善传质的方式。本研究中获得的高甲烷产率为该工艺的工业化铺平了道路。
