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Production of volatile fatty acids from slaughterhouse blood by mixed-culture fermentation / Jersson Plácido; Yue Zhang

Biomass Conversion and Biorefinery

Swansea University Author: Placido Escobar, Jersson

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Abstract

The volatile fatty acids (VFA) production potential from animal blood and the factors affecting this process were investigated in this study. In order to simulate an industrial process different operation modes, batch, fed batch and semi-continuous, were also evaluated. Due to high ammonia concentra...

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Published in: Biomass Conversion and Biorefinery
ISSN: 2190-6815 2190-6823
Published: Springernature 2018
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa39328
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Abstract: The volatile fatty acids (VFA) production potential from animal blood and the factors affecting this process were investigated in this study. In order to simulate an industrial process different operation modes, batch, fed batch and semi-continuous, were also evaluated. Due to high ammonia concentration in fermentation broth, VFA concentration up to 100 g L-1 was achieved without addition of buffer and methanogen inhibitor. In general, acetic, n-butyric and iso-valeric acids were the most predominant species, although different operational conditions affected the VFA concentration, profile, production rate and yield. The microbial community analysis was conducted on the reactors with the best performance, revealing that 70-90% of the microbial population was from the Clostridiales order with a strong presence from the Sporanaerobacter genus. These results demonstrated the feasibility of a VFA-platform bio-refinery using high-protein wastes as substrate via mixed-culture fermentation under non-sterilised conditions.
Keywords: Mixed-culture fermentation; volatile fatty acids; slaughterhouse blood; enzymatic hydrolysis, bio-refinery.
College: Swansea University Medical School