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.
References
Jan 1, 1995·European Journal of Applied Physiology and Occupational Physiology·P PianosiJ C Haworth
Feb 23, 2002·Bioresource Technology·Herbert H P Fang, Hong Liu
Aug 28, 2004·Trends in Biotechnology·Largus T AngenentRosa Domíguez-Espinosa
Dec 31, 2005·Environmental Science & Technology·Steven Van Ginkel, Bruce E Logan
Jun 6, 2006·Environmental Science & Technology·Idania Valdez-VazquezHéctor M Poggi-Varaldo
Oct 20, 2006·Trends in Biotechnology·B Hahn-HägerdalG Zacchi
Jul 28, 2007·Biotechnology and Bioengineering·Margarida F TemudoMark van Loosdrecht
Oct 11, 2008·Nature Biotechnology·Wayne Martindale, Anthony Trewavas
Apr 14, 2009·Bioresource Technology·Tam-Anh D NguyenSang Jun Sim
Mar 2, 2010·Trends in Biotechnology·Hyung-Sool LeeBruce E Rittmann
Apr 10, 2010·Environmental Science & Technology·Yuxiao ZhaoXiaoyu Zhu
Nov 30, 2010·Talanta·Juan-Rodrigo Bastidas-OyanedelDamien J Batstone
Apr 23, 2011·Bioresource Technology·C CavinatoP Pavan
Citations
Nov 8, 2013·Applied Microbiology and Biotechnology·Fang ZhangRaymond J Zeng
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
Feb 28, 2021·Bioresource Technology·Jialong HuangYuanyuan Wang