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Investigating the feasibility and the limits of high rate anaerobic winery wastewater treatment using a hybrid-EGSB bio-reactor

Lookup NU author(s): Dr Evangelos Petropoulos, Dr Matthew WadeORCiD

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Abstract

Biodegradability and activity tests of winery wastewater at 37 °C using inoculum from a paper mill suggested hydrolysis as the rate limiting step with hydrogen the predominant pathway to methane. Scaling-up to a Hybrid-EGSB showed that after 100 days acclimation at moderate temperatures (20 ± 2 °C) a 70 ± 2% COD removal is achievable, applying an OLR of up to 15.32 kgCOD·m−3·day−1 and an SLR of 3.83 kgCOD·kgVSS−1·day−1 respectively. Conventional operation and mesophilic temperature increase improved COD removal efficiency (≤96%) while sCOD concentration met the European COD effluent standards. COD:CH4 conversion reached 0.31 ± 0.07 m3 CH4·kgCODremoved−1; COD:biogas estimated 0.45 ± 0.06 m3gas·kgCODremoved−1, ∼300% higher than the acclimation period. Operation remained stable at OLR < 39 kgCOD·m−3·day−1, which corresponds to an SLR of 4.8 kgCOD·kgVSS−1·day−1. This limit results in an Alkbicarb.:Alktot ∼0.31 and a pH ∼6.51, an irreversible status that demonstrates the limits of anaerobic treatment of winery wastewater with this reactor setup.

Publication metadata

Author(s): Petropoulos E, Cuff G, Huete E, Garcia G, Wade MJ, Spera D, Aloisio L, Rochard J, Torres A, Weichgrebe D

Publication type: Article

Publication status: Published

Journal: Process Safety and Environmental Protection

Year: 2016

Volume: 102

Pages: 107-118

Print publication date: 01/07/2016

Online publication date: 01/03/2016

Acceptance date: 27/02/2016

ISSN (print): 0957-5820

ISSN (electronic): 1744-3598

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/j.psep.2016.02.015

DOI: 10.1016/j.psep.2016.02.015

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