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A study of anaerobic digestibility of two-phases olive mill solid waste (OMSW) at mesophilic temperature

A study of anaerobic digestibility of two-phases olive mill solid waste (OMSW) at mesophilic temperature
A study of anaerobic digestibility of two-phases olive mill solid waste (OMSW) at mesophilic temperature
A study of the anaerobic digestibility of two-phases olive mill solid waste (OMSW) was carried out in a laboratory-scale completely stirred tank reactor at mesophilic temperature (35 °C). The reactor was operated at influent substrate concentrations of 34.5 g COD/l (OMSW 20%), 81.1 g COD/l (OMSW 40%), 113.1 g COD/l (OMSW 60%) and 150.3 g COD/l (OMSW 80%). The hydraulic retention time (HRT) varied between 40.0 and 8.3 days for the first feed used (OMSW 20%) and between 50 and 10 days for the other three influent substrate concentrations. Chemical oxygen demand (COD) and volatile solids (VS) removal efficiencies of 88.4 and 90.9%, respectively, were achieved at an organic loading rate (OLR) of 12.02 g COD/l day for the most concentrated substrate used (OMSW 80%). The maximum methane production rate was found to be 2.12 l CH4/l day for the above-mentioned OLR and a HRT of 12.5 days. The system can tolerate OLRs as high as 15.03 g COD/l day with COD and VS removal efficiencies of 82.9 and 86.6%, respectively, for this feed concentration. The methane yield coefficients were 0.30, 0.27, 0.23 and 0.20 l methane STP/g COD removed for the OMSW concentrations of 20, 40, 60 and 80%, respectively.
anaerobic digestibility, two-phases olive mill solid waste (omsw), mesophilic temperature
1359-5113
733-742
Borja, R.
ed513484-04ff-4424-ab79-dc715ca63146
Rincón, B.
d8fe6652-8ff6-4662-bfb7-3b231d140957
Raposo, F.
47104451-511a-4b03-aaa9-67348da4567d
Alba, J.
0d5b56ef-a2d6-44dd-8564-320a5482108e
Martin, A.
169f0afa-12fc-43b5-a72d-7bfc493aa170
Borja, R.
ed513484-04ff-4424-ab79-dc715ca63146
Rincón, B.
d8fe6652-8ff6-4662-bfb7-3b231d140957
Raposo, F.
47104451-511a-4b03-aaa9-67348da4567d
Alba, J.
0d5b56ef-a2d6-44dd-8564-320a5482108e
Martin, A.
169f0afa-12fc-43b5-a72d-7bfc493aa170

Borja, R., Rincón, B., Raposo, F., Alba, J. and Martin, A. (2002) A study of anaerobic digestibility of two-phases olive mill solid waste (OMSW) at mesophilic temperature. Process Biochemistry, 38 (5), 733-742. (doi:10.1016/S0032-9592(02)00202-9).

Record type: Article

Abstract

A study of the anaerobic digestibility of two-phases olive mill solid waste (OMSW) was carried out in a laboratory-scale completely stirred tank reactor at mesophilic temperature (35 °C). The reactor was operated at influent substrate concentrations of 34.5 g COD/l (OMSW 20%), 81.1 g COD/l (OMSW 40%), 113.1 g COD/l (OMSW 60%) and 150.3 g COD/l (OMSW 80%). The hydraulic retention time (HRT) varied between 40.0 and 8.3 days for the first feed used (OMSW 20%) and between 50 and 10 days for the other three influent substrate concentrations. Chemical oxygen demand (COD) and volatile solids (VS) removal efficiencies of 88.4 and 90.9%, respectively, were achieved at an organic loading rate (OLR) of 12.02 g COD/l day for the most concentrated substrate used (OMSW 80%). The maximum methane production rate was found to be 2.12 l CH4/l day for the above-mentioned OLR and a HRT of 12.5 days. The system can tolerate OLRs as high as 15.03 g COD/l day with COD and VS removal efficiencies of 82.9 and 86.6%, respectively, for this feed concentration. The methane yield coefficients were 0.30, 0.27, 0.23 and 0.20 l methane STP/g COD removed for the OMSW concentrations of 20, 40, 60 and 80%, respectively.

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More information

Published date: 31 December 2002
Keywords: anaerobic digestibility, two-phases olive mill solid waste (omsw), mesophilic temperature

Identifiers

Local EPrints ID: 53032
URI: http://eprints.soton.ac.uk/id/eprint/53032
ISSN: 1359-5113
PURE UUID: 2cd590a0-f9f7-4fcd-84ff-2b08c8346d10

Catalogue record

Date deposited: 18 Jul 2008
Last modified: 13 Mar 2019 20:41

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