Abstract

Biomethanation of the syngas from biomass gasification provides an alternative method for production of biofuel and chemicals. CO in syngas plays a key role in biomethanation of syngas, as it is both a substrate and an inhibitor of certain methanogenesis processes. In this study, CO biomethanation by using a mixture of N₂ and CO as the gas substrate, was investigated with the help of 5 adapted anaerobic granular sludges under thermophilic and mesophilic conditions. The results show that CO biomethanation by the adapted inocula is omnipresent. The sludge from the juice plant has a methane yield more than 80% of the theoretical value both at 37 °C and 55 °C. Increasing the temperature from 37 °C to 55 °C has a slight effect on the final methane production, but can significantly increase the CO consumption rate and shorten the time for CO biomethanation.

Graphic Abstract

中文翻译：

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不同厌氧颗粒污泥的一氧化碳生物甲烷化

摘要

来自生物质气化的合成气的生物甲烷化为生产生物燃料和化学品提供了另一种方法。合成气中的CO在合成气的生物甲烷化中起关键作用，因为它既是某些甲烷生成过程的底物又是抑制剂。在这项研究中，通过使用N ₂的混合物进行CO生物甲烷化在嗜热和中温条件下，借助5种适应性厌氧颗粒污泥，研究了以CO和CO为气体基质。结果表明，适应接种的CO生物甲烷化无所不在。在37°C和55°C下，榨汁厂产生的污泥甲烷产率均超过理论值的80％。将温度从37°C升高到55°C对最终甲烷的产生有轻微的影响，但可以显着提高CO的消耗速率并缩短CO生物甲烷化的时间。

图形摘要