Effect of microbial community structure in inoculum on the stimulation of direct interspecies electron transfer for methanogenesis

Kang, Hye Won; Lee, Sang Hoon; Lim, Tae Guen; Park, Hee Deung

doi:10.1016/j.biortech.2021.125100

Cited by 23 publications

(3 citation statements)

References 31 publications

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“…The initial inoculum also affects the community dynamics; for example, the presence of Methanolinea sp. in the early inoculum has an impact on community dynamics, mainly by reducing the lag period in the bioreactor [58]. It is observed that the introduction of 4% food waste in sewage sludge significantly reduces the lag phase with an abundance of Methanosaeta sp.…”

Section: Microbial Diversity and Dynamics Involved In Biogas Productionmentioning

confidence: 99%

Advancements and Innovations in Harnessing Microbial Processes for Enhanced Biogas Production from Waste Materials

Das,

Das

et al. 2023

Agriculture

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Biogas production from waste materials has emerged as a promising avenue for sustainable energy generation, offering a dual benefit of waste management and renewable energy production. The selection and preparation of waste feedstocks, including agricultural residues, food waste, animal manure, and municipal solid wastes, are important for this process, while the microbial communities are majorly responsible for bioconversions. This review explores the role of complex microbial communities and their functions responsible for the anaerobic digestion of wastes. It covers the crucial physiological processes including hydrolysis, acidogenesis, acetogenesis, and methanogenesis, elucidating the microbial activities and metabolic pathways involved in the prospects of improving the efficiency of biogas production. This article further discusses the influence of recent progress in molecular techniques, including genomics, metagenomics, meta-transcriptomics, and stable isotope probing. These advancements have greatly improved our understanding of microbial communities and their capabilities of biogas production from waste materials. The integration of these techniques with process monitoring and control strategies has been elaborated to offer possibilities for optimizing biogas production and ensuring process stability. Microbial additives, co-digestion of diverse feedstocks, and process optimization through microbial community engineering have been discussed as effective approaches to enhance the efficiency of biogas production. This review also outlines the emerging trends and future prospects in microbial-based biogas production, including the utilization of synthetic biology tools for engineering novel microbial strains and consortia, harnessing microbiomes from extreme environments, and integrating biogas production with other biotechnological processes. While there are several reviews regarding the technical aspects of biogas production, this article stands out by offering up-to-date insights and recommendations for leveraging the potential of microbial communities, and their physiological roles for efficient biogas production. These insights emphasize the pivotal role of microbes in enhancing biogas production, ultimately contributing to the advancement of a sustainable and carbon-neutral future.

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Section: Microbial Diversity and Dynamics Involved In Biogas Productionmentioning

confidence: 99%

Advancements and Innovations in Harnessing Microbial Processes for Enhanced Biogas Production from Waste Materials

Das,

Das

et al. 2023

Agriculture

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“…However, the detailed mechanism of DIET is still ambiguous [20,22]. Kang et al showed that the effect of GAC on AD performance is independent of the inocula composition, and GAC promoted biomethane production through enrichment of DIET-related bacteria and methanogens on its surface [56,57]. Zhang et al observed a 20% increase in methane production by GAC addition in up-flow anaerobic sludge blankets [58].…”

Section: Promoting Interspecies Electron Transfer Efficiencymentioning

confidence: 99%

Enhanced methane production by granular activated carbon: A review

Xiao

Liu

Kumar

et al. 2022

Fuel

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“…They play a crucial role in the degradation of carbohydrates and better adapt to harsh conditions than bacteria while reducing the limitations faced in the hydrolysis step [ 41 ]. The hydrolyzed simpler molecules are further assimilated by these microbes into the aforementioned bioproducts, which can be digested to produce biogas or biomethane by acetoclastic methanogens such as Methanosarcinales and Methanosaeta and hydrogenotrophic methanogens like Methanobacteriales, Methanom-icrobium, Methanomassiliicoccales [ 48 , 49 ]. Any alteration in the microbiome of the reactor can affect these processes, and similarly, any alteration in the operational or environmental conditions can affect the microbiome [ 46 ].…”

Section: Introductionmentioning

confidence: 99%

Next-generation -omics approaches to drive carboxylate production by acidogenic fermentation of food waste: a review

Kumar

Brar

et al. 2022

Bioengineered

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Acidogenic fermentation of food waste using mixed microbial cultures can produce carboxylates [or volatile fatty acids (VFA)] as high-valued bioproducts via a complex interplay of microorganisms during different stages of this process. However, the present fermentation systems are incapable of reaching the industrially relevant VFA production yields of ≥50 g/L primarly due to the complex process operation, competitive metabolic pathways, and limited understanding of microbial interplays. Recent reports have demonstrated the significant roles played by microbial communities from different phyla, which work together to control the process kinetics of various stages underlying acidogenic fermentation. In order to fully delineate the abundance, structure, and functionality of these microbial communities, next-generation high-throughput meta-omics technologies are required. In this article, we review the potential of metagenomics and metatranscriptomics approaches to enable microbial community engineering. Specifically, a deeper analysis of taxonomic relationships, shifts in microbial communities, and differences in the genetic expression of key pathway enzymes under varying operational and environmental parameters of acidogenic fermentation could lead to the identification of species-level functionalities for both cultivable and non-cultivable microbial fractions. Furthermore, it could also be used for successful gene sequence-guided microbial isolation and consortium development for bioaugmentation to allow VFA production with high concentrations and purity. Such highly controlled and engineered microbial systems could pave the way for tailored and high-yielding VFA synthesis, thereby creating a petrochemically competitive waste-to-value chain and promoting the circular bioeconomy.Research HighlightsMixed microbial mediated acidogenic fermentation of food waste.Metagenomics and metatranscriptomics based microbial community analysis.Omics derived function-associated microbial isolation and consortium engineering.High-valued sustainable carboxylate bio-products, i.e. volatile fatty acids.

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Effect of microbial community structure in inoculum on the stimulation of direct interspecies electron transfer for methanogenesis

Cited by 23 publications

References 31 publications

Advancements and Innovations in Harnessing Microbial Processes for Enhanced Biogas Production from Waste Materials

Advancements and Innovations in Harnessing Microbial Processes for Enhanced Biogas Production from Waste Materials

Enhanced methane production by granular activated carbon: A review

Next-generation -omics approaches to drive carboxylate production by acidogenic fermentation of food waste: a review

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