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Biorefinery for heterogeneous organic waste using microbial electrochemical technology

Desmond-Le Quéméner, Elie; Bridier, Arnaud; Tian, Jiang-Hao; Madigou, Celine; Bureau, Chrystelle; Qi, Yujiao and Bouchez, Théodore (2019) Biorefinery for heterogeneous organic waste using microbial electrochemical technology. Bioresource Technology.

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Document available online at: https://hal.inrae.fr/hal-02623488


Environmental biorefineries aim to produce biofuels and platform biomolecules from organic waste. To this end, microbial electrochemical technologies theoretically allow controlled microbial electrosynthesis (MES) of organic molecules to be coupled to oxidation of waste. Here, we provide a first proof of concept and a robust operation strategy for MES in a microbial electrolysis cell (MEC) fed with biowaste hydrolysates. This strategy allowed stable operation at 5 A/m2 for more than three months in a labscale reactor. We report a two to four-fold reduction in power consumption compared to microbial electrosynthesis with water oxidation at the anode. The bioelectrochemical characterizations of the cells were used to compute energy and matter balances for biorefinery scenarios in which anaerobic digestion (AD) provides the electricity and CO2 required for the MEC. Calculations shows that up to 22% of electrons (or COD) from waste may be converted to organic products in the AD-MEC process.

EPrint Type:Journal paper
Keywords:microbial electrolysis cell (en), microbial electrosynthesis (en), anaerobic digestion (en), environmental biorefinery (en)
Subjects:"Organics" in general
Research affiliation: France > INRAe - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
ISSN:ISSN: 0960-8524
Project ID:HAL-INRAe
Deposited By: PENVERN, Servane
ID Code:41131
Deposited On:12 Aug 2021 10:37
Last Modified:12 Aug 2021 10:37
Document Language:English

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