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Anaerobic digestion of wash waters derived from the purification of virgin olive oil using a hybrid reactor combining a filter and a sludge blanket

Borja, Rafael, Alba, José and Banks, Charles J. (1996) Anaerobic digestion of wash waters derived from the purification of virgin olive oil using a hybrid reactor combining a filter and a sludge blanket Process Biochemistry, 31, (3), pp. 219-224. (doi:10.1016/0032-9592(95)00050-X).

Record type: Article

Abstract

A laboratory-scale hybrid anaerobic reactor, the bottom third of which was occupied by a sludge blanket, the upper two-thirds by submerged clay rings, was used for treatment of wash waters derived from the purification of olive oil in a new manufacturing process. The reactor was operated under mesophilic conditions at different influent substrate concentrations. The hydraulic retention times (HRT) ranged from 0·20 to 1·02 days under normal operating conditions after the start-up. Chemical oxygen demand (COD) removal efficiencies of more than 89% were achieved at an organic loading rate (OLR) of 8·0 kg COD/m3 day. OLR was gradually increased from 2·6 to 7·1 kg COD/m3 day within 16 days but the anaerobic reactor performances did not change significantly. The reactor was operated under varying influent COD concentrations to test the response of the system to both high and low strength wash waters. The system can tolerate OLRs as high as 17·8 kg COD/m3 day with an average COD removal efficiency of 76·2%. Although the reactor was fed by diluted influent, with an average COD of 1030 mg/litre, at very high hydraulic loadings (HRT = 4·8 h) COD removals over 75% were achieved.

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Published date: 1996

Identifiers

Local EPrints ID: 75311
URI: http://eprints.soton.ac.uk/id/eprint/75311
ISSN: 1359-5113
PURE UUID: 29a3ddc6-52dd-4846-b285-8007f66be85e

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:43

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Author: Rafael Borja
Author: José Alba

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