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Title (Primary) Microbial electrochemical oxidation of anaerobic digestion effluent from treating HTC process water
Author Dai, S.; Korth, B.; Vogt, C.; Harnisch, F.;
Journal Frontiers in Chemical Engineering
Year 2021
Department ISOBIO; UMB;
Volume 3
Language englisch;
Supplements https://www.frontiersin.org/articles/10.3389/fceng.2021.652445/full#supplementary-material
Keywords Microbial electrochemical technologies; wastewater treatment; Electroactive microorganisms; microbial electrochemistry; Microbial fuel cell
Abstract Hydrothermal carbonization (HTC) is a promising technology for chemical and material synthesis. However, HTC produces not only valuable solid coal-like materials, but also yields process water (PW) with high chemical oxygen demand (COD) that requires extensive treatment. Anaerobic digestion (AD) has been used for initial treatment of HTC-PW, but the AD effluent is still high in COD and particles. Here, we show that microbial electrochemical technologies (MET) can be applied for COD removal from AD effluent of HTC-PW. Bioelectrochemical systems (BES) treating different shares of AD effluent from HTC-PW exhibited similar trends for current production. Thereby, maximum current densities of 0.24 mA cm-2 and COD removal of 65.4±4.4% were reached (n=3). Microbial community analysis showed that the genus Geobacter dominated anode biofilm and liquid phase of all reactors indicating its central role for COD oxidation and current generation.
ID 24176
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24176
Dai, S., Korth, B., Vogt, C., Harnisch, F. (2021):
Microbial electrochemical oxidation of anaerobic digestion effluent from treating HTC process water
Front. Chem. Eng. 3 , art. 652445