Impact factors and novel strategies for improving biohydrogen production in microbial electrolysis cells

Cheng, Dongle; Ngo, Huu Hao; Guo, Wenshan; Chang, Soon Woong; Nguyen, Dinh Duc; Zhang, Shicheng; Deng, Shihai; Ding, An; Hoang, Ngoc Bich

doi:10.1016/j.biortech.2021.126588

Cited by 46 publications

(6 citation statements)

References 84 publications

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“…The reliance on these monomeric sugars is not sustainable as feedstocks account for >50% of the overall H 2 costs [ 90 ]. Recent studies focus on biomass residues to circumvent this issue because these carbon materials are readily available, affordable, and considered waste [ 91 ]. The main carbon sources should be used in conjunction with the micronutrients (e.g., Ca, Cu, Mg, Ni, Mn, Pb, Zn, etc.)…”

Section: Biofilm Enrichment Methods Applied In Biohydrogen Fermenter ...mentioning

confidence: 99%

Elucidating the Role of Biofilm-Forming Microbial Communities in Fermentative Biohydrogen Process: An Overview

et al. 2022

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Amongst the biofuels described in the literature, biohydrogen has gained heightened attention over the past decade due to its remarkable properties. Biohydrogen is a renewable form of H2 that can be produced under ambient conditions and at a low cost from biomass residues. Innovative approaches are continuously being applied to overcome the low process yields and pave the way for its scalability. Since the process primarily depends on the biohydrogen-producing bacteria, there is a need to acquire in-depth knowledge about the ecology of the various assemblages participating in the process, establishing effective bioaugmentation methods. This work provides an overview of the biofilm-forming communities during H2 production by mixed cultures and the synergistic associations established by certain species during H2 production. The strategies that enhance the growth of biofilms within the H2 reactors are also discussed. A short section is also included, explaining techniques used for examining and studying these biofilm structures. The work concludes with some suggestions that could lead to breakthroughs in this area of research.

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Section: Biofilm Enrichment Methods Applied In Biohydrogen Fermenter ...mentioning

confidence: 99%

Elucidating the Role of Biofilm-Forming Microbial Communities in Fermentative Biohydrogen Process: An Overview

et al. 2022

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“…The use of experimental data is focused on validating the simulation results of the simplified microbial biofilm growth model. The process domains of MEC considered in this study are as follows: (i) a double chamber reactor configuration with a proton exchange membrane as the hydrogen-proton junction; (ii) using as substrate a wastewater sample from a local sago processing mill in Mukah, Sarawak, Malaysia; and (iii) the applied potential (Eapplied) in the range of 0.1 to 0.8 V [1,23,24]. The bioelectrochemical efficiencies such as COD removal efficiency, coulombic efficiency, and energy efficiency [25] were used to evaluate the process limit of the model MEC.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Mathematical Modeling of Microbial Electrolysis Cell for the Production of Hydrogen From Sago Wastewater Substrate

Mohd Asrul,

Atan,

Abdul Halim Yun

et al. 2024

AEJ

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The nonlinear phenomenon of the profile of substrate concentration and hydrogen production rate over 16 retention days in a 4 L double chamber of a microbial electrolysis cell (MEC) for bioelectrochemical production of hydrogen from sago wastewater validates the mathematical modeling results based on simplified microbial biofilm growth. The stoichiometric reaction and kinetics affect the substrate concentration curve behaviour, but the effects also include the bioelectrochemical balance for hydrogen production rate. The artificial neural network (ANN) predicts the experimental hydrogen production rate according to the input of pH of the catholyte at controlled applied potential of 0.8 V and current density of 0.632 A‧m-2. The convex method assists the model in finding the optimal input values that lead to the minimum mean square error (MSE) between modelling and experimental data. Evaluation of the COD removed efficiency, coulombic efficiency, and energy efficiency determines the process limit of the model MEC. At an optimum applied potential of 0.485 V, anode surface area of 0.098 m2, anodic chamber volume of 4 L, and initial substrate concentration of 2,500.99 mg‧L-1, the MEC model reached maximum steady-state percentage at 81.99% of COD removed efficiency, 69.01% of Coulombic efficiency, and 7.47% of energy efficiency.

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“…In the circular economy, recovery and recycling of resources are becoming more critical perspectives in wastewater treatment beyond reducing the contaminants [1,2]. Carbon neutrality is presently a much-debated topic for wastewater treatment plants, involving conversations around the reduction of energy consumption, energy resources recovery, and greenhouse gas (GHG) emissions [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Review and Opinions on the Research, Development and Application of Microalgae Culture Technologies for Resource Recovery from Wastewater

You

Deng

Wang

et al. 2023

Water

Self Cite

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Wastewater is an abundant source of nutrients and energy. Under the circumstances of circular economy and carbon neutrality, resource recovery from wastewater has recently been motivated. The microalgal process is a promising alternative for resource recovery from wastewater, and it possesses potential for the cost reduction of wastewater treatment and fertilizer production, energy generation, and greenhouse gas emissions reduction. This paper reviews and discusses state-of-the-art microalgal process development, including microalgal species screening, configuration, biotic consortia construction, infection avoidance, nutrients balancing, operational parameter optimization, and biomass harvesting enhancement. Due to the lack of literature on practical applications, the microalgal process lacks economic and environmental feasibility assessments. Life cycle assessments from the perspective of circular economy and carbon neutrality on upscaled microalgal processes are required for various wastewater scenarios. To promote the upscaled application and successful implementation, efforts are also suggested to establish utilization guidelines, advanced recommendations, reliable standards, and proper safety evaluation criteria. This work could provide a reference and direct the follow-up research, development, and application of microalgae (MA)-based processes for resource recovery from wastewater.

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Impact factors and novel strategies for improving biohydrogen production in microbial electrolysis cells

Cited by 46 publications

References 84 publications

Elucidating the Role of Biofilm-Forming Microbial Communities in Fermentative Biohydrogen Process: An Overview

Elucidating the Role of Biofilm-Forming Microbial Communities in Fermentative Biohydrogen Process: An Overview

Optimization of Mathematical Modeling of Microbial Electrolysis Cell for the Production of Hydrogen From Sago Wastewater Substrate

Review and Opinions on the Research, Development and Application of Microalgae Culture Technologies for Resource Recovery from Wastewater

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