Jafary, Tahereh Daud, Wan Ramli Wan Ghasemi, Mostafa Abu Bakar, Mimi Hani Sedighi, Mehdi Kim, Byung Hong Carmona-Martinez, Alessandro A. Jahim, Jamaliah Md Ismail, Manal 2024-01-19T19:00:36Z 2024-01-19T19:00:36Z 2022-01-25 2019-11 0360-3199 https://pubs.kist.re.kr/handle/201004/119354 The recent interest in microbial electrolysis cell (MEC) technology has led the research platform to develop full biological MECs (bioanode-biocathode, FB-MEC). This study focused on biohydrogen production from a biologically catalyzed MEC. A bioanode and a biocathode were initially enriched in a half biological MFC (bioanode-abiocathode, HBMFC) and a half biological MEC (abioanode-biocathode, HB-MEC), respectively. The FBMEC was established by transferring the biocathode of the HB-MEC and the bioanode of the HB-MFC to a two-chamber MEC. The FB-MEC was operated under batch (FB-MEC-B) and recirculation batch (FB-MEC-RB) modes of operation in the anodic chamber. The FB-MEC-B reached a maximum current density of 1.5 A/m(2) and the FB-MEC-RB reached a maximum current density of 2.5 A/m(2) at a similar applied voltage while the abiotic control system showed the maximum of 0.2 A/m(2). Hydrogen production rate decreased in the FB-MEC compared to that of the HB-MEC. However, the cathodic hydrogen recovery increased from 42% obtained in the HB-MEC to 56% in the FB-MEC-B and 65% in the FB-MEC-RB, suggesting the efficient oxidation and reduction rates in the FB-MEC compared to the HB-MEC. The onset potential for hydrogen evolution reaction detected by linear sweep voltammetry analysis were -0.780 and -0.860 V vs Ag/AgCl for the FB-MEC-RB and the FBMEC-B (-1.26 for the abiotic control MEC), respectively. Moreover, the results suggested that the FB-MEC worked more efficiently when the biocathode and the bioanode were enriched initially in half biological systems before transferring to the FB-MEC compared to that of the simultaneously enriched in one system. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD Clean hydrogen production in a full biological microbial electrolysis cell Article 10.1016/j.ijhydene.2018.01.010 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.44, no.58, pp.30524 - 30531 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 44 58 30524 30531 N scie scopus 000499768600003 2-s2.0-85040700738 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article; Proceedings Paper BIOHYDROGEN PRODUCTION BIOCATHODE PERFORMANCE GENERATION CATALYSTS SYSTEMS WATER Microbial electrolysis cell Full biological system Mode of operation Hydrogen production Onset potential