Fermentative biohydrogen production from a novel combination of vermicompost as inoculum and mild heat-pretreated fruit and vegetable waste

• 出版年: Biofuel Research Journal
• 主要な著者: María J. Pascualone, Marcos B. Gómez Costa, Pablo R. Dalmasso
• フォーマット: 論文
• 言語: 英語
• 出版事項: Alpha Creation Enterprise 2019-09-01
• 主題: Biohydrogen; Dark fermentation; Fruit and vegetable waste; Vermicompost; Mild heat-pretreated substrate
• オンライン･アクセス: http://www.biofueljournal.com/article_92202_e09847ac934ee462c82a301cc34fd9a8.pdf
• ISSN: 2292-8782; 2292-8782

This study reports for the first time on biohydrogen production by dark fermentation using a novel combination of mild heat-pretreated fruit and vegetable waste (FVW) as raw material and vermicompost as an economical source of hydrogen-producing bacteria. A suspension rich in reducing sugars obtained from FVW was used at different initial concentrations (5 to 25 g reducing sugars/L) during the bioprocess conducted in batch reactors at mesophilic temperature of 35 °C. The use of a mild heat-pretreated substrate and the consequent elimination of the natural microbiota present in the FVW led to higher hydrogen production than the control. <em>Clostridium</em> species, hydrogen-producing bacteria <em>via</em> butyric acid fermentation pathway, were the dominant microorganisms in the bioprocess. Hydrogen production, volumetric hydrogen production rate, and pretreated substrate degradation efficiency (63.0 mL/g VS, 372.6 mL/L/d, and 50% BOD₅, respectively) obtained in the experiments performed with the highest substrate concentration demonstrated that the developed bioprocess was promising simultaneously leading to high hydrogen contents in biogas and high substrate removal efficiencies.