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Acidogenic fermentation of food waste for volatile fatty acid production with co-generation of biohydrogen.

Abstract：

:Fermentation experiments were designed to elucidate the functional role of the redox microenvironment on volatile fatty acid (VFA, short chain carboxylic acid) production and co-generation of biohydrogen (H2). Higher VFA productivity was observed at pH 10 operation (6.3g/l) followed by pH 9, pH 6, pH 5, pH 7, pH 8 and pH 11 (3.5 g/l). High degree of acidification, good system buffering capacity along with co-generation of higher H2 production from food waste was also noticed at alkaline condition. Experiments illustrated the role of initial pH on carboxylic acids synthesis. Alkaline redox conditions assist solubilization of carbohydrates, protein and fats and also suppress the growth of methanogens. Among the carboxylic acids, acetate fraction was higher at alkaline condition than corresponding neutral or acidic operations. Integrated process of VFA production from waste with co-generation of H2 can be considered as a green and sustainable platform for value-addition.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Dahiya S,Sarkar O,Swamy YV,Venkata Mohan S

doi

10.1016/j.biortech.2015.01.007

subject

Has Abstract

pub_date

2015-04-01 00:00:00

pages

103-113

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(15)00017-6

journal_volume

182

pub_type

杂志文章

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