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 Technoljournal_title
Bioresource technologyauthors
Dahiya S,Sarkar O,Swamy YV,Venkata Mohan Sdoi
10.1016/j.biortech.2015.01.007subject
Has Abstractpub_date
2015-04-01 00:00:00pages
103-113eissn
0960-8524issn
1873-2976pii
S0960-8524(15)00017-6journal_volume
182pub_type
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