Syarif Hidayat, Young-Hyun Song, Joo-Yang Park

International Biodeterioration & Biodegradation • 2016

Ahmed I. Osman, Tanmay J. Deka, D.C. Baruah et al.

Biomass Conversion and Biorefinery • 2020

Abstract The ever-increasing world energy demand drives the need for new and sustainable renewable fuel to mitigate problems associated with greenhouse gas emissions such as climate change. This helps in the development toward decarbonisation. Thus, in recent years, hydrogen has been seen as a promising candidate in global renewable energy agendas, where the production of biohydrogen gains more attention compared with fossil-based hydrogen. In this review, biohydrogen production using organic waste materials through fermentation, biophotolysis, microbial electrolysis cell and gasification are discussed and analysed from a technological perspective. The main focus herein is to summarise and criticise through bibliometric analysis and put forward the guidelines for the potential future routes of biohydrogen production from biomass and especially organic waste materials. This research review claims that substantial efforts currently and, in the future, should focus on biohydrogen production from integrated technology of processes of (i) dark and photofermentation, (ii) microbial electrolysis cell (MEC) and (iii) gasification of combined different biowastes. Furthermore, bibliometric mapping shows that hydrogen production from biomethanol and the modelling process are growing areas in the biohydrogen research that lead to zero-carbon energy soon.

Abudukeremu Kadier, Mohd Sahaid Kalil, Azah Mohamed et al.

Jurnal Teknologi • 2017

Microbial electrolysis cell (MEC) is an innovative and green technology to generate hydrogen from a wide range of renewable energy sources and wastewater. At current stage, the performance of these systems is still far from real-world applications. The most likely limiting factors for successful commercialization of this technology are the large internal resistance, high fabrication and operational costs. The aim of the present study was to enhance hydrogen production, reduce the construction and operational costs in MECs via development of a novel MEC design. A single-chamber membrane-free MEC was designed and successfully produced hydrogen from organic substrate using a pure culture: Geobacter sulfurreducens PCA. The MEC system was operated with Platinum (Pt) cathode at applied voltage range of 0.6 V to 1.1 V. Geobacter sulfurreducens PCA strain and sodium acetate used as inoculum and a fuel sources, respectively. The conductivity of electrolyte solution in the MEC was 4.5 mS/cm. Due to an improved the MEC reactor architecture, the maximum hydrogen production rate (HPR) of 3.67 ± 0.03 m3 H2 /m3 d with volumetric current density (IV) of 293.73 ± 1.18 A/m3 was achieved under an external applied voltage (Eap): 1.1 V. The highest overall hydrogen recovery ( ) and overall energy efficiency ( ) were 91.80 ± 1.06% and 66.97 ± 0.09%, respectively.

Na Zhao, Shujuan Meng, Xiaohu Li et al.

Bioresource Technology • 2024

Mohan Qin, William A. Maza, Bethany M. Stratakes et al.

Journal of The Electrochemical Society • 2016

Hydrogen production in microbial electrolysis cells (MECs) is a promising approach for energy harvesting from wastewater. The kinetic barriers toward proton reduction necessitate the use of catalysts to drive hydrogen formation at appreciable rates and low applied potentials. Towards this end, cost effective alternatives to platinum catalysts are of paramount interest. In this study, Ni(OH) 2 films were synthesized by electrophoretic deposition from a Ni(II)cyclam precursor solution at varying concentrations (6 mM, 15 mM, and 23 mM). The films were characterized by scanning electron microscopy and X-ray photo-electron spectroscopy to confirm the deposition of Ni(OH)2. The Ni(OH) 2 -modified electrodes were then examined by both traditional electrochemical measurements and in an MEC for hydrogen production. Tafel analysis indicates an exchange current density of ∼0.36 mA cm −2 with a Tafel slope of ∼120 mV decade −1 consistent with a rate determining proton adsoprtion step. The hydrogen production rates increased with increasing Ni(II)cyclam concentration in the precursor solution, with the 23 mM-derived film exhibiting a rate comparable to that of a Pt-based catalyst in MEC tests.

Mélida del Pilar Anzola-Rojas, Felipe Eng Sánchez, Lucas Tadeu Fuess et al.

International Journal of Hydrogen Energy • 2024

Jingnan Zhang, Hanghang Chang, Xiaohu Li et al.

Environmental Science and Pollution Research • 2022

Bing Wang, Yiwen Liu, Xin Wang et al.

Water Research • 2023

Ruixia Shen, Lixin Zhao, Jianwen Lu et al.

• 2019

A large amount of real complex wastewaters are generated every year, which leads to a great environmental burden. Various treatment technologies were deployed to remove the contaminants in the wastewaters. However, these actual wastewaters have not been sufficiently treated due to their complex properties, high-concentration organics, incomplete utilization of hard-biodegradable substrates, the high energy input required, etc. Recently, microbial electrolysis cells (MECs), a great potential technology, has emerged for various wastewater treatment, because not only do they demonstrate satisfactory performance during wastewater treatment, but they also generate renewable H2 as a clean energy carrier. Unlike previous reviews, this review introduced the characteristics of every complicated wastewater, and focused on analyzing and summarizing MEC development for wastewater treatment. The performances of MECs were systematically reviewed in terms of organics removal, H2 production, Columbic efficiency, and energy efficiency. MEC performances for treating actual complex wastewaters and producing H2 can be optimized through operation parameters, electrode materials, catalyst materials, etc. In addition, the challenges and opportunities including complexity of wastewaters, instability of H2 production, robust microorganisms, effect of membrane on two-chamber MEC, and integration of MEC with other treatment processes were deeply discussed. Except for the technical feasibility, both environmental feasibility and economic feasibility also need to meet social requirements. This review can indeed provide a basis for high-efficiency treatment and practical commercial applications of recalcitrant wastewaters via MECs in the future. Keywords: microbial electrolysis cells, complex wastewater, H2 production, renewable energy, energy efficiency DOI: 10.25165/j.ijabe.20191205.5061 Citation: Shen R X, Zhao L X, Lu J W, Watson J, Si B C, Chen X, et al. Treatment of recalcitrant wastewater and hydrogen production via microbial electrolysis cells. Int J Agric & Biol Eng, 2019; 12(5): 179–189.

Tahereh Jafary, Anteneh Mesfin Yeneneh, Wan Ramli Wan Daud et al.

International Journal of Environmental Science and Technology • 2021

Yu-Li Yang, Hailin Ren, Pinhas Ben‐Tzvi et al.

International Journal of Hydrogen Energy • 2017

Han Cui, Yang Yang, Jing Wang et al.

The Science of The Total Environment • 2020

Huy Hoang Phan Quang, Thi Pham Phan, Phan Khanh Thinh Nguyen

International Journal of Hydrogen Energy • 2025

Yu Zhao, Zhishuai Dong, Yuxue Wang et al.

International Journal of Hydrogen Energy • 2019

Ariadna Segundo-Aguilar, Linda V. González‐Gutiérrez, Vı́ctor Climent et al.

Sustainable Energy & Fuels • 2021

Simultaneous dual production of hydrogen and methane at 0.43 V and 65% biomass enables an economic benefit of 0.010 USD per kg COD removed.

Yunjeong Choi, Danbee Kim, Hyung‐Min Choi et al.

Bioresource Technology • 2023

V. Alcaraz‐González, Guillermo Rodriguez–Valenzuela, Juan Jose Gomez–Martinez et al.

Journal of Environmental Management • 2020

Hongyan Dai, Huimin Yang, Zhenhai Liang

International Journal of Electrochemical Science • 2021

A series of MoS2-Cu-RGO composites were synthesized by hydrothermal method, and loaded on the carbon-based electrode. The best MoS2-Cu-RGO electrode selected through electrochemical tests was applied as the cathode to produce hydrogen in a single-chamber microbial electrolysis cell (MEC). SEM and TEM images showed that most thin MoS2 sheets vertically grew on the surface of RGO; Cu2O acted as the bridged absorbent and efficient charge transfer channels between RGO and MoS2, which exposed more hydrogen evolution active sites and improved the electrical conductivity. Electrochemical tests showed that the optimal mass ratio of (NH4)2MoS4, GO and CuCl2·2H2O was 1:1:1.1, and 3 mg/cm2 was the optimal load for carbon paper. The average current density, coulombic efficiency, hydrogen recovery efficiency, cathodic hydrogen recovery efficiency, hydrogen production rate, electrical recovery efficiencies and overall energy recovery efficiencies obtained with MoS2-Cu-RGO cathode MEC were 10.28±0.40 A/m2, 92.10±3.53%, 74.69±4.45%, 79.22±3.53%, 0.449±0.027 m3H2/m3d, 237.68±15.66% and 88.20±5.60%, higher than those obtained with the Pt/C cathode MEC. The MoS2-Cu-RGO cathode enjoyed good stability and price advantage, which might promote the practical application of MECs.

Leyi Chen, Yu‐Chen S. H. Yang, Kengqiang Zhong et al.

Chemical Engineering Journal • 2025

Thi Pham Phan, Tuan Loi Nguyen, Phan Khanh Thinh Nguyen

Biomass and Bioenergy • 2023

Jae-Hoon Hwang, Saisaban Fahad, Hodon Ryu et al.

Journal of Power Sources • 2022

Claudia L. Paz-Mireles, Elías Razo‐Flores, G. Trejo et al.

Journal of Electroanalytical Chemistry • 2019

Pratiksha Srivastava, Cristina González‐Fernández, Jesús Palma et al.

Catalysis Today • 2023

Jinyoung Yoon, Dae-Yeol Cheong, Gahyun Baek

Applied Energy • 2024

The current- and H 2 -producing performances of microbial electrolysis cells (MECs) were predicted by constructing machine learning models based on the previous 76 MEC datasets, making it the largest dataset to date. All models showed high correlation efficiency (R 2 > 0.92) in predicting MEC performances. When the models were constructed separately based on the organic substrate type used in the anode of MECs, the models based solely on acetate-fed MEC data exhibited higher prediction accuracies compared to those on all kinds of substrate or complex substrate-based data. As a results of the feature importance analysis, the applied voltage and cathode surface area were identified as the two most critical factors in the acetate-fed MEC data models. Still low prediction accuracies in the models here seem to be due to several important features which could not be numerically presented and thus not be considered as input variables such as electrode material types. • RF models were constructed to predict current and H 2 productions from MECs. • All models showed high prediction accuracies based on total 76 data points. • The models were constructed separately based on the organic substrate type fed. • The E ap and cathode surface area were critical factors in acetate-fed MEC models. • Non-numerical factors need to be considered such as electrode material types.

Daniel A. Moreno-Jimenez, Kyoung‐Yeol Kim

Bioresource Technology • 2022

Ruixia Shen, Lixin Zhao, Jianwen Lu et al.

International journal of agricultural and biological engineering • 2019

A large amount of real complex wastewaters are generated every year, which leads to a great environmental burden. Various treatment technologies were deployed to remove the contaminants in the wastewaters. However, these actual wastewaters have not been sufficiently treated due to their complex properties, high-concentration organics, incomplete utilization of hard-biodegradable substrates, the high energy input required, etc. Recently, microbial electrolysis cells (MECs), a great potential technology, has emerged for various wastewater treatment, because not only do they demonstrate satisfactory performance during wastewater treatment, but they also generate renewable H2 as a clean energy carrier. Unlike previous reviews, this review introduced the characteristics of every complicated wastewater, and focused on analyzing and summarizing MEC development for wastewater treatment. The performances of MECs were systematically reviewed in terms of organics removal, H2 production, Columbic efficiency, and energy efficiency. MEC performances for treating actual complex wastewaters and producing H2 can be optimized through operation parameters, electrode materials, catalyst materials, etc. In addition, the challenges and opportunities including complexity of wastewaters, instability of H2 production, robust microorganisms, effect of membrane on two-chamber MEC, and integration of MEC with other treatment processes were deeply discussed. Except for the technical feasibility, both environmental feasibility and economic feasibility also need to meet social requirements. This review can indeed provide a basis for high-efficiency treatment and practical commercial applications of recalcitrant wastewaters via MECs in the future. Keywords: microbial electrolysis cells, complex wastewater, H2 production, renewable energy, energy efficiency DOI: 10.25165/j.ijabe.20191205.5061 Citation: Shen R X, Zhao L X, Lu J W, Watson J, Si B C, Chen X, et al. Treatment of recalcitrant wastewater and hydrogen production via microbial electrolysis cells. Int J Agric & Biol Eng, 2019; 12(5): 179–189.

Kiros Hagos, Chang Liu, Xiaohua Lü

Chinese Journal of Chemical Engineering • 2017

Sung-Gwan Park, Chaeyoung Rhee, Dipak A. Jadhav et al.

Chemical Engineering Journal • 2024

Jun Hyun Kim, Changhoon Kim, Yongwon Jeon et al.

Bulletin of the Korean Chemical Society • 2019

Domestic and industrial wastewaters are subject to the biological treatment process before discharged to environment. In that process, organic substances contained in the wastewater are degraded by microorganisms. Microbial electrolysis cells (MECs) are suitable technology for wastewater treatment, simultaneously producing hydrogen. In most case, however, a significant amount of methane instead of hydrogen is produced when the wastewater is used for MECs. Here we show that hydrogen is the main product when Makgeolli wastewater (MW) is used as a substrate in a single‐chamber MEC which was operated using acetate and MW. Although current generation profiles vary according to the substrate type and the applied voltage, hydrogen portions were maintained over 90% at −0.6 V and −0.8 V with production rates of 0.95 and 1.55 m 3 H 2 /m 3 /d, respectively. This result shows a possibility of implementing MECs in the real wastewater treatment and hydrogen production.

Maede Yahyanezhad Gele, Atieh Sadat Sadat Kachooei, Soheila Yaghmaei et al.

Journal of environmental chemical engineering • 2023

Núria Montpart, Mireia Baeza, Juan Antonio Baeza et al.

International Journal of Hydrogen Energy • 2016

Abudukeremu Kadier, Raghuveer Singh, Dongsheng Song et al.

International Journal of Hydrogen Energy • 2022

Woo Hyun Yun, Young Soo Yoon, Hyon Hee Yoon et al.

International Journal of Hydrogen Energy • 2021

Itta Ochiai, Tomoka Harada, Shinji Jomori et al.

Bioresource Technology • 2023

Na Zhao, Dawei Liang, Xiaohu Li et al.

Bioresource Technology • 2021

Young-Hyun Song, Syarif Hidayat, Agus Jatnika Effendi et al.

Journal of Industrial and Engineering Chemistry • 2020

Yongwon Jeon, Sunghyun Kim

ChemSusChem • 2016

A microbial electrolysis cell, though considered as a promising, environmentally friendly technology for hydrogen production, suffers from concomitant production of methane. The high hydrogen/methane ratio at the initial operation stage decreases with time. Here we report for the first time the photoassisted microbial electrolysis cell (MEC) for persistent hydrogen production using polyaniline nanofibers as a cathode. Under 0.8 V external bias and laboratory fluorescent light illumination in a single-chamber MEC, continuous hydrogen production from acetate at a rate of 1.78 mH2 3 m -3 d -1 with 79.2 % overall hydrogen recovery was achieved with negligible methane formation for six months. Energy efficiencies based on input electricity as well as input electricity plus substrate were 182 and 66.2 %, respectively. This was attributed to the p-type-semiconductor characteristics of polyaniline nanofibers in which photoexcited electrons are used to reduce protons at the surface and holes are reduced with electrons originating from acetate oxidation at the anode. This method can be extended to microbial wastewater treatment for hydrogen production.

Tunç Çatal, Tansu Göver, Bugra Yaman et al.

World Journal of Microbiology and Biotechnology • 2017

Xiaoyu Han, Youpeng Qu, Yue Dong et al.

International Journal of Hydrogen Energy • 2018

Hongyan Dai, Huimin Yang, Xian Liu et al.

Acta Metallurgica Sinica (English Letters) • 2018