Removal and recovery of inhibitory volatile fatty acids from mixed acid fermentations by conventional electrodialysis.

Abstract:

:Hydrogen production during dark fermentation is inhibited by the co-production of volatile fatty acids (VFAs) such as acetic and n-butyric acid. In this study, the effectiveness of conventional electrodialysis (CED) in reducing VFA concentrations in model solutions and hydrogen fermentation broths is evaluated. This is the first time CED has been reported to remove VFAs from hydrogen fermentation broths. During 60 min of operation CED removed up to 99% of VFAs from model solutions, sucrose-fed and grass-fed hydrogen fermentation broths, containing up to 1200 mg l(-1) each of acetic acid, propionic acid, i-butyric acid, n-butyric acid, i-valeric acid, and n-valeric acid. CED's ability to remove VFAs from hydrogen fermentation broths suggests that this technology is capable of improving hydrogen yields from dark fermentation.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Jones RJ,Massanet-Nicolau J,Guwy A,Premier GC,Dinsdale RM,Reilly M

doi

10.1016/j.biortech.2015.04.001

subject

Has Abstract

pub_date

2015-08-01 00:00:00

pages

279-284

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(15)00484-8

journal_volume

189

pub_type

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