An overview of microbial biogas enrichment

Aryal, Nabin; Kvist, Torben; Ammam, Fariza; Pant, Deepak; Ottosen, Lars Ditlev Mørck

doi:10.1016/j.biortech.2018.06.013

Cited by 200 publications

(123 citation statements)

References 87 publications

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“…The low temperature condition has become the main reason for the limited application of anaerobic digestion technology for the treatment of agricultural organic waste in North China. It was found that low temperatures resulted in a low biogas production and unstable operational performance in the anaerobic digestion system [29]. The effects of increasing or decreasing temperatures followed by the re-establishment of the initial temperature have been assessed in some previous studies.…”

Section: Introductionmentioning

confidence: 99%

Influence of Temperature on Biogas Production Efficiency and Microbial Community in a Two-Phase Anaerobic Digestion System

Wang

et al. 2019

Water

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In this study, the influence of temperature on biogas production efficiency and the microbial community structure was investigated in a two-phase anaerobic digestion reactor for co-digestion of cow manure and corn straw. The results illustrated that the contents of solluted chemical oxygen demand (SCOD) and volatile fatty acid (VFA) in the acidogenic phase and biogas production in the methanogenic phase maintained relatively higher levels at temperatures ranging from 35-25 • C. The methane content of biogas production could be maintained higher than 50% at temperatures above 25 • C. The microbial community structure analysis indicated that the dominant functional bacteria were Acinetobacter, Acetitomaculum, and Bacillus in the acidogenic phase and Cenarchaeum in the methanogenic phase at 35-25 • C. However, the performances of the acidogenic phase and the methanogenic phase could be significantly decreased at a lower temperature of 20 • C, and microbial activity was inhibited obviously. Accordingly, a low temperature was adverse for the performance of the acidogenic and methanogenic phases, while moderate temperatures above 25 • C were more conducive to high biogas production efficiency.

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Section: Introductionmentioning

confidence: 99%

Influence of Temperature on Biogas Production Efficiency and Microbial Community in a Two-Phase Anaerobic Digestion System

Wang

et al. 2019

Water

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“…Biogas is a key energy resource in the emerging global renewable energy resource market, and biogas technology is considered crucial for the transition away from fossil fuel dependence. 6 The organic concentration in the effluent of biogas tanks is still high. A few farms also built aerobic facilities to deal with biogas slurry, but were unable to consistently operate these facilities due to high energy consumption and operating costs.…”

Section: Introductionmentioning

confidence: 99%

Organic matter and ammonia removal by a novel integrated process of constructed wetland and microbial fuel cells

et al. 2019

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“…However, its commercialization is strongly limited by HPR. More specifically, the HPR in MECs at laboratory scale could only reach about 3 m 3 H2/ m 3 . The lower hydrogen production and lower current density recorded with pilot reactors, compared to the laboratory reactors were due to several differences between these systems.…”

Section: Advantages and Disadvantages Of Mec Technologymentioning

confidence: 99%

“…Thus, methane production was enhanced with improving reactor stability, while lower contamination was observed by combining the MEC with AD (Clauwaert et al, 2008;Tartakovsky et al, 2011). Combining MEC with AD is an excellent example of how MECs can be used in a modular way to enhance the productivity of an existing technology (Aryal et al, 2018).…”

Section: Integration Of Mec With Anaerobic Digestion (Ad)mentioning

confidence: 99%

Biorefinery perspectives of microbial electrolysis cells (MECs) for hydrogen and valuable chemicals production through wastewater treatment

et al. 2020

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The degradation of waste organics through microbial electrolysis cell (MEC) generates hydrogen (H2) gas in an economically efficient way. MEC is known as the advanced concept of the microbial fuel cell (MFC) but requires a minor amount of supplementary electrical energy to produce H2 in the cathode microenvironment. Different bio/processes could be integrated to generate additional energy from the substrate used in MECs, which would make the whole process more sustainable. On the other hand, the energy required to drive the MEC mechanism could be harvested from renewable energy sources. These integrations could advance the efficiency and economic feasibility of the whole process. The present review critically discusses all the integrations investigated to date with MECs such as MFCs, anaerobic digestion, microbial desalination cells, membrane bioreactors, solar energy harvesting systems, etc. Energy generating non-biological and eco-friendly processes (such as dyesensitized solar cells and thermoelectric microconverters) which could also be integrated with MECs, are also presented and reviewed. Achieving a comprehensive understanding about MEC integration could help with developing advanced biorefineries towards more sustainable energy management. Finally, the challenges related to the scaling up of these processes are also scrutinized with the aim to identify the practical hurdles faced in the MEC processes.Wastewater treatment Dark fermentation Substrate degradation ©2020 BRTeam. All rights reserved.Journal homepage: www.biofueljournal.com HIGHLIGHTS ➢Critically reviews the niche areas, fundamentals, and advantages of the MEC technology. ➢Comprehensively quantifies and analyses performance of MEC based on integrated approaches. ➢Discuss existing challenges and limitations of MEC platform for biorefinery applications.

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An overview of microbial biogas enrichment

Cited by 200 publications

References 87 publications

Influence of Temperature on Biogas Production Efficiency and Microbial Community in a Two-Phase Anaerobic Digestion System

Influence of Temperature on Biogas Production Efficiency and Microbial Community in a Two-Phase Anaerobic Digestion System

Organic matter and ammonia removal by a novel integrated process of constructed wetland and microbial fuel cells

Biorefinery perspectives of microbial electrolysis cells (MECs) for hydrogen and valuable chemicals production through wastewater treatment

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