Title
Effect of solid and liquid retention times on hydrolysis of maize
Description
First stage hydrolysis/acidification, using maize as the substrate, was carried out both in single pass (SP) reactors at different hydraulic retention times (HRT) and in hydraulic flush (HF) reactors in which the solids and liquid retention time were uncoupled. The HF reactors were operated at two different loadings (2 and 4 g VS l-1 d-1) and at liquid retention times between 2–16 days with solids held for 20 days. The volatile solids destruction (VS destroyed d-1) and specific methane potential (l CH4 g VSadded d-1) of the intermediate products formed in the SP reactors both decreased with increasing retention and showed a maximum VS destruction of 55.6% at a 2-day HRT. The HF reactors showed a slightly lower VS destruction at the same loading but the methane potential was slightly higher as the intermediate COD produced had a greater proportion of volatile fatty acids (VFA) present. At the loading used it was necessary to operate the HF reactors at a HRT of less than 8 days to have any benefit over the SP reactors.
URL
http://dx.doi.org/10.2166/wst.2008.490
URL Description
Abstract
Language
English
Author
Sonia Heaven
Author
Charles Banks
Author
Marie Cornell

anaerobic digestion; hydraulic flush; hydrolysis; maize; rural development; rural issues; farming; agriculture

Volume number
58
Issue number
7
Is this item peer reviewed?
Yes
ISSN
0273-1223
Copyright URL
http://www.iwaponline.com/iwapopen.htm
Publisher
IWA Publishing
Date of publication
01 January 2008
Page reference
1371-1378
Place of publication
London
Is this item a pre-print or post-print?
Postprint
Title of journal
Water science and technology
Harvard
Heaven, Sonia et al (2008) Effect of solid and liquid retention times on hydrolysis of maize. Water science and technology. 58 (7), pp. 1371-1378 London: IWA Publishing.
Vancouver
Heaven Sonia et al. Effect of solid and liquid retention times on hydrolysis of maize. Water science and technology 2008; 58 (7): 1371-1378.