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Municipal waste liquor treatment via bioelectrochemical and fermentation (H2 + CH4) processes: Assessment of various technological sequences

Rózsenberszki, Tamás and Koók, László and Bakonyi, Péter and Nemestóthy, Nándor and Logroño, Washington and Kurdi, Róbert and Sarkady, Attila (2017) Municipal waste liquor treatment via bioelectrochemical and fermentation (H2 + CH4) processes: Assessment of various technological sequences. CHEMOSPHERE, 171. pp. 692-701. ISSN 0045-6535

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Abstract

In this paper, the anaerobic treatment of a high organic-strength wastewater-type feedstoc®k, referred as the liquid fraction of pressed municipal solid waste (LPW) was studied for energy recovery and organic matter removal. The processes investigated were (i) dark fermentation to produce biohydrogen, (ii) anaerobic digestion for biogas formation and (iii) microbial fuel cells for electrical energy generation. To find a feasible alternative for LPW treatment (meeting the two-fold aims given above), various one- as well as multi-stage processes were tested. The applications were evaluated based on their (i) COD removal efficiencies and (ii) specific energy gain. As a result, considering the former aspect, the single-stage processes could be ranked as: microbial fuel cell (92.4 %)> anaerobic digestion (50.2 %)> hydrogen fermentation (8.8 %). From the latter standpoint, an order of hydrogen fermentation (2277 J g-1 CODremoved d-1)> anaerobic digestion (205 J g-1 CODremoved d-1)> microbial fuel cell (0.43 J g-1 CODremoved d-1) was attained. The assessment showed that combined, multi-step treatment was necessary to simultaneously achieve efficient organic matter removal and energy recovery from LPW. Therefore, a three-stage system (hydrogen fermentation-biomethanation-bioelectrochemical cell in sequence) was suggested. The different approaches were characterized via the estimation of COD balance, as well.

Item Type: Article
Subjects: T Technology / alkalmazott, műszaki tudományok > TD Environmental technology. Sanitary engineering / környezetvédelem, hulladékkezelés, egészségügyi mérnöki technika (ivóvízellátási és szennyvízkezelési technika)
T Technology / alkalmazott, műszaki tudományok > TP Chemical technology / vegyipar, vegyészeti technológia
Depositing User: Péter Bakonyi
Date Deposited: 05 Feb 2020 15:15
Last Modified: 05 Feb 2020 15:15
URI: http://real.mtak.hu/id/eprint/106148

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