Microorganisms and Enzymes Used in the Biological Pretreatment of the Substrate to Enhance Biogas Production: A Review

Ferdeş, Mariana; Dincă, M.; Moiceanu, Georgiana; Zabava, Bianca-Stefania; Paraschiv, G.

doi:10.3390/su12177205

Cited by 104 publications

(47 citation statements)

References 143 publications

(159 reference statements)

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“…The microbial community in the rumen is capable of degrading crude fiber that cannot be digested by a host animal, maintaining high metabolic performance and the health of ruminants. Anaerobic fungi are one of the first microorganisms in the rumen to colonize the fibrous tissue of plants, efficiently degrading the components of plant cell walls [ 19 ]. Before anaerobic fungi were confirmed to exist, the scientific community generally believed that fungi were obligate aerobic microorganisms.…”

Section: Taxonomy Distribution Metabolism and Fiber Degrading Ementioning

confidence: 99%

Interactions between Anaerobic Fungi and Methanogens in the Rumen and Their Biotechnological Potential in Biogas Production from Lignocellulosic Materials

Meng

et al. 2021

Microorganisms

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Anaerobic fungi in the digestive tract of herbivores are one of the critical types of fiber-degrading microorganisms present in the rumen. They degrade lignocellulosic materials using unique rhizoid structures and a diverse range of fiber-degrading enzymes, producing metabolic products such as H2/CO2, formate, lactate, acetate, and ethanol. Methanogens in the rumen utilize some of these products (e.g., H2 and formate) to produce methane. An investigation of the interactions between anaerobic fungi and methanogens is helpful as it provides valuable insight into the microbial interactions within the rumen. During the last few decades, research has demonstrated that anaerobic fungi stimulate the growth of methanogens and maintain methanogenic diversity. Meanwhile, methanogens increase the fiber-degrading capability of anaerobic fungi and stimulate metabolic pathways in the fungal hydrogenosome. The ability of co-cultures of anaerobic fungi and methanogens to degrade fiber and produce methane could potentially be a valuable method for the degradation of lignocellulosic materials and methane production.

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Section: Taxonomy Distribution Metabolism and Fiber Degrading Ementioning

confidence: 99%

Interactions between Anaerobic Fungi and Methanogens in the Rumen and Their Biotechnological Potential in Biogas Production from Lignocellulosic Materials

Meng

et al. 2021

Microorganisms

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“…The upgrading to biomethane can generally improve air quality and reduce greenhouse gas emissions. However, methane losses in the off-gas may affect the sustainability of the whole process [53][54][55][56][57][58].…”

Section: Resultsmentioning

confidence: 99%

Bioenergy Waste Recycling: Modelling of Developmental Trends

Danylov¹,

Chubur²,

Chernysh³

et al. 2020

Man and Environment. Issues of Neoecology

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Purpose. Modelling environmentally safe bioenergy trends based on national and international patent databases and scientific databases. Methods. Bibliometric method of analysis using the Scopus database and patent databases, modeling methods using a special visualization software package. Results. An analytical diagram based on the review of patent databases was developed, as well as a model for visualization of interrelationships between clusters of bioenergy development trends as a complex solution for environmental protection. Thus, 4 clusters were formed based on data from the Scopus database using VOSviewer software: 1) cluster (red) reveals the environmental problems of changing the direction of implementation of stationary energy sources with the development of bioenergy potential, and the creation of strategies for this development at the level of regions; 2) cluster (yellow) covers the process of restoration of ecological systems, in particular forests and reduction of CO2 emissions from bioenergy; 3) cluster (green) covers the production and use of different types of fuel and energy produced by the introduction and improvement of bioenergy technologies; 4) cluster (blue) covers the impact of bioenergy technologies on environmental restoration and purification and reduction of damage from anthropogenic impact. Conclusions. The analysis of patent databases with cluster visualization based on a bibliometric approach allowed to identify the most promising areas of research in the field of bioenergy solutions development. Further research will be focused on the development of a lab bench for biogenic gas production with the possibility of complex processing of secondary raw materials and obtaining environmentally safe digestates.

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“…2 and Table 1 shows the high content of TS & BOD (mg/l) in the sample indicating the presence of a higher number of microorganisms and organic matter. The organic matter (bacteria) breaks down the organic compounds of the silage (feedstock) and produces CH4, also higher BOD results in higher production of biogas [13]. With the characterization and determination of parameters that influence the biogas production [14], it was concluded that Napier grass silage with a pH of 4.59, least Total Solids of 4020 mg/l and the maximum BOD of 342.93 mg/l was expected to give the optimum rate of CH4 production.…”

Section: Pre-field Workmentioning

confidence: 99%

Biochemical Methane Potential Assessment by Anaerobic Digestion of Locally Available Grasses of Phuentsholing, Bhutan

Choden

Zangmo

Tamang

et al. 2021

JERR

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Renewable energy is not only environmental friendly but also promotes sustainable development. Biogas being one of the abundantly used renewable resource, the enhancement and optimization of the yield of biogas can help in reduction of dependence on imported fuel. Biochemical methane potential (BMP) assessment of grass will determine the production of methane (CH4) from this substrate through the process of anaerobic digestion. After determining the parameters such as pH, Biochemical Oxygen Demand (BOD) and Total solids (TS) of three types of local grasses known as Basil, Bermuda and Napier, that affects the production of biogas, Napier grass resulted with the highest potential to produce CH4 gas. Batch and continuous reactor method under mesophilic condition was adopted. The composition of biogas from continuous reactor was obtained using a biogas analyzer (Biogas 5000 Geotech), from which 30.8% of CH4, 8% of CO2 and other inert gases were found. Also, methane to carbon dioxide (CH4: CO2) ratio of 3.81: 1 approximately (80% - 20%) was achieved. Moreover, the batch reactor method showed that 1L Napier grass silage would yield 0.81L of biogas. The concentration of CH4 gas from Napier grass in hydraulic retention time as short as 20 days was very significant. This study shows that Napier grass can be used as an alternative sustainable source of energy in the country which can improve resource constraints.

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Microorganisms and Enzymes Used in the Biological Pretreatment of the Substrate to Enhance Biogas Production: A Review

Cited by 104 publications

References 143 publications

Interactions between Anaerobic Fungi and Methanogens in the Rumen and Their Biotechnological Potential in Biogas Production from Lignocellulosic Materials

Interactions between Anaerobic Fungi and Methanogens in the Rumen and Their Biotechnological Potential in Biogas Production from Lignocellulosic Materials

Bioenergy Waste Recycling: Modelling of Developmental Trends

Biochemical Methane Potential Assessment by Anaerobic Digestion of Locally Available Grasses of Phuentsholing, Bhutan

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