The University of Southampton
University of Southampton Institutional Repository

Mesophilic anaerobic digestion in a fluidised-bed reactor of wastewater from the production of protein isolates from chickpea flour

Borja, R., Rincón, B., Raposo, F., Domínguez, J.R., Millán, F. and Martín, A. (2004) Mesophilic anaerobic digestion in a fluidised-bed reactor of wastewater from the production of protein isolates from chickpea flour Process Biochemistry, 39, (12), pp. 1913-1921. (doi:10.1016/j.procbio.2003.09.022).

Record type: Article

Abstract

A study of the anaerobic digestion of wastewater derived from the production of protein isolates from chickpea flour was carried out in a laboratory-scale, mesophilic (35 °C) fluidised-bed reactor with saponite as bacterial support. Soluble chemical oxygen demand (SCOD) removal efficiencies in the range of 96.8–85.2% were achieved in the reactor at organic loading rates (OLR) of between 0.58 and 2.10 g chemical oxygen demand (COD)/l per day, hydraulic retention times (HRT) of between 14.9 and 4.5 days and average feed COD concentration of 9.1 g/l. Eighty-five percent of feed COD could be removed up to OLR of 2.1 g COD/l per day. The yield coefficient of methane production was 0.34 l of methane (at STP) per gram COD removed and was virtually independent of the OLR applied. Because the buffering capacity of the experimental system was maintained at favourable levels with excess total alkalinity present at all loadings, the rate of methanogenesis was not affected by loading. Experimental data indicated that a total alkalinity in the range of 1090–2130 mg/l as CaCO3 was sufficient to prevent the pH from decreasing to below 7.2 for OLR of up to 2.7 g COD/l per day. The volatile fatty acid (VFA) levels and the VFA/alkalinity ratio were lower than the suggested limits for digester failure (0.3–0.4) for OLR and HRT up to 2.7 g COD/l per day and 3.5 days, respectively. For a HRT of 2.8 days (OLR of 3.00 g COD/l per day) the start of acidification was observed in the reactor.

Full text not available from this repository.

More information

Published date: 29 October 2004
Keywords: Mesophilic anaerobic digestion, fluidised-bed reactor, wastewater, protein isolates, chickpea flour

Identifiers

Local EPrints ID: 53029
URI: http://eprints.soton.ac.uk/id/eprint/53029
ISSN: 1359-5113
PURE UUID: f7504ea3-a675-4786-ac6a-731ee576899b

Catalogue record

Date deposited: 18 Jul 2008
Last modified: 17 Jul 2017 14:39

Export record

Altmetrics

Contributors

Author: R. Borja
Author: B. Rincón
Author: F. Raposo
Author: J.R. Domínguez
Author: F. Millán
Author: A. Martín

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×