Innovative CO₂ pretreatment for enhancing biohydrogen production from the organic fraction of municipal solid waste (OFMSW)

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• 作者：Kathy Bru ; Vincent Blazy ; Catherine Joulian ; Eric Trably ; Eric Latrille ; Marianne Qu¨¦m¨¦neur ; Marie-Christine Dictor
• 关键词：Acidogenesis ; Bacterial communities dynamics ; Bioreactor ; Dark fermentation ; Domestic waste ; Hydrogen
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 出版时间：October, 2012
• 年：2012
• 卷：37
• 期：19
• 页码：14062-14071
• 全文大小：515 K

文摘

A series of batch tests was conducted to investigate the effect of a CO₂ sparging pretreatment on hydrogen production from fermentation of the organic fraction of municipal solid waste. Tests were carried out in a stirred bioreactor without adding inoculum or supplementation solution, at 35?¡ãC and with a pH regulated at 5.5. The influence of CO₂ flowrate (30, 100 and 500?mL/min) was evaluated. Results showed a decrease in biological hydrogen production for a sparging flowrate of , similar performances for the control experiments and for a sparging flowrate of and an increase in biohydrogen production for a sparging flowrate of . For this latter operating condition, a substantial improvement in hydrogen production performances was obtained with an increase in the hydrogen yield by more than 20 % and a decrease in the chemicals consumption used to maintain the pH by more than 20 % . No shift in the metabolic pathways and in the bacterial community structure was observed but positive bacterial interactions occurred and enhanced the hydrogen production. Therefore, this study suggested that the growth of hydrogen producing bacteria could be either enhanced or slowed down by a CO₂ sparging pretreatment depending on the level of CO₂ flowrate, the shift being close to .