Effect of Fe3O4 nanoparticles on microbial diversity and biogas production in anaerobic digestion of crude glycerol

Boscaro, Mateus Eugenio; Marin, Danieli Fernanda Canaver; Silva, Daiana Camila da; Maintinguer, Sandra Imaculada

doi:10.1016/j.biombioe.2022.106439

Cited by 18 publications

(3 citation statements)

References 32 publications

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“…At the end of digestion, the concentration of oil in the magnetite presence group was significantly lower than that in the blank, e.g., in the 5% magnetite group, the concentration of oil and grease was 120 mg/L, whereas, in R0, the oil concentration was as high as 251 mg/L. It was confirmed that oil was converted to longchain fatty acids during anaerobic digestion, and the accumulation of LCFA reduced the metabolic activity of methanogenic bacteria, thereby reducing methane production [27,28]. Magnetite accelerated the hydrolysis process of organic matter within the oily sludge and promoted the degradation of oil, thus increasing methane production.…”

Section: Effect Of Magnetite On the Release Of Soluble Organic Matter...mentioning

confidence: 89%

“…R0, the oil concentration was as high as 251 mg/L. It was confirmed that oil was converted to long-chain fatty acids during anaerobic digestion, and the accumulation of LCFA reduced the metabolic activity of methanogenic bacteria, thereby reducing methane production [27,28]. Magnetite accelerated the hydrolysis process of organic matter within the oily sludge and promoted the degradation of oil, thus increasing methane production.…”

Section: Effect Of Magnetite On Vfa Content and Composition During Oi...mentioning

confidence: 96%

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New Insight into Magnetic Enhanced Methane Production from Oily Sludge via Mesophilic Anaerobic Degradation Processes

Liu

2023

Water

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Anaerobic digestion is a promising technology for treating and disposing of oily sludge, but the presence of oil in the sludge reduces methane production and sludge volume reduction. To overcome this limitation, this study creatively reports the use of magnetite to enhance methane production in oily sludge mesophilic anaerobic digestion and elucidates the underlying mechanism. Results show that the addition of magnetite increases methane production, with a 5% magnetite content leading to a 1.42-fold increase in cumulative methane output compared to the blank. Mechanistically, magnetite accelerates the release of organic matter, promotes oil degradation, increases volatile fatty acids (VFA) accumulation, and reduces the proportion of propionate. Additionally, magnetite alleviates pH decreases and increases the release of ammonia nitrogen and phosphate, resulting in effective sludge reduction, with volatile suspended solids (VSS) reduction ranging from 26.9% to 32.6%, higher than that of the blank. Moreover, magnetite accelerates electron transfer and increased the relative abundance of microorganisms associated with methane production, with the relative abundance of Methanosarcina increasing to 37.6~38.5% due to the presence of magnetite. This study provides a theoretical framework for effectively utilizing oily sludge through the application of magnetite.

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Section: Effect Of Magnetite On the Release Of Soluble Organic Matter...mentioning

confidence: 89%

Section: Effect Of Magnetite On Vfa Content and Composition During Oi...mentioning

confidence: 96%

New Insight into Magnetic Enhanced Methane Production from Oily Sludge via Mesophilic Anaerobic Degradation Processes

Liu

2023

Water

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“…The application of nanoparticles is also reported to enhance microbial activity within the bioreactor. The addition of citrate-coated Fe 3 O 4 nanoparticles in sludge and crude glycerol supplied bioreactors enhanced the abundance of microorganisms from the orders Bacteroidales, Clostridiales, Methanomicrobiales, and Methanosarcinales with a 49.8% accumulation of methane in bioreactor [49]. In a recent study, it was found that nanoparticles are involved in the abundance and movement of mobile genetic elements in anaerobic digesters, and this movement is associated with an increase in antibiotic resistance genes within the bioreactor and is found most abundant in Proteobacteria and Firmicutes [50].…”

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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Synthesis of Agricultural Resources as Biomass for Biodiesel Production

Hassan,

Moyo,

Thuch

et al. 2024

Clean Energy Production Technologies

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Effect of Fe3O4 nanoparticles on microbial diversity and biogas production in anaerobic digestion of crude glycerol

Cited by 18 publications

References 32 publications

New Insight into Magnetic Enhanced Methane Production from Oily Sludge via Mesophilic Anaerobic Degradation Processes

New Insight into Magnetic Enhanced Methane Production from Oily Sludge via Mesophilic Anaerobic Degradation Processes

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

Synthesis of Agricultural Resources as Biomass for Biodiesel Production

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