Gas controlled hydrogen fermentation

Bioresource Technology
Juan-Rodrigo Bastidas-OyanedelDamien J Batstone

Abstract

Acidogenic fermentation is an anaerobic process of double purpose, while treating organic residues it produces chemical compounds, such as hydrogen, ethanol and organic acids. Therefore, acidogenic fermentation arises as an attractive biotechnology process towards the biorefinery concept. Moreover, this process does not need sterile operating conditions and works under a wide range of pH. Changes of operating conditions produce metabolic shifts, inducing variability on acidogenic product yield. To induce those changes, experiments, based on reactor headspace N(2)-flushing (gas phase), were designed. A major result was the hydrogen yield increase from 1 to 3.25±0.4 ( [Formula: see text] ) at pH 4.5 and N(2)-flushing of 58.4 (L·d(-1)). This yield is close to the theoretical acidogenic value (4 [Formula: see text] ). The mechanisms that explain this increase on hydrogen yield shifts are related to the thermodynamics of three metabolic reactions: lactate hydrogenase, NADH hydrogenase and homoacetogenesis, which are affected by the low hydrogen partial pressures.

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Citations

Jun 1, 2014·Applied Biochemistry and Biotechnology·S Esquivel-ElizondoE I Garcia-Peña
Oct 25, 2014·Applied Microbiology and Biotechnology·Fang ZhangRaymond J Zeng
Nov 19, 2015·Environmental Science & Technology·Monica MartinsInês Antunes Cardoso Pereira
Apr 8, 2016·Applied Microbiology and Biotechnology·Hang ZhengWilliam P Clarke
May 7, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Juan E Ramírez-MoralesGonzalo Ruiz-Filippi
Aug 2, 2017·MSystems·S Esquivel-ElizondoR Krajmalnik-Brown
Aug 3, 2017·Applied Microbiology and Biotechnology·Kun DaiRaymond J Zeng
Dec 15, 2020·The Science of the Total Environment·Han CuiDefeng Xing

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