Two-Stage Anaerobic Digestion for Green Energy Production: A Review

Processes, Journal Year: 2025, Volume and Issue: 13(2), P. 294 - 294

Published: Jan. 21, 2025

Anaerobic digestion (AD) is a biotechnological process in which the microorganisms degrade complex organic matter to simpler components under anaerobic conditions produce biogas and fertilizer. This has many environmental benefits, such as green energy production, waste treatment, protection, greenhouse gas emissions reduction. It long been known that two main species (acidogenic bacteria methanogenic archaea) community of AD differ aspects, optimal for their growth development are different. Therefore, if performed single bioreactor (single-phase process), selected taking into account slow-growing methanogens at expense fast-growing acidogens, affecting efficiency whole process. led two-stage (TSAD) recent years, where processes divided cascade separate bioreactors (BRs). division consecutive BRs leads significantly higher yields two-phase system (H2 + CH4) compared traditional single-stage CH4 production review presents state art, advantages disadvantages, some perspectives (based on more than 210 references from 2002 2024 our own studies), including all aspects TSAD—different parameters’ influences, types bioreactors, microbiology, mathematical modeling, automatic control, energetical considerations TSAD processes.

Language: Английский

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Hydrogen and methane production through two stage anaerobic digestion of straw residues

Environmental Research, Journal Year: 2024, Volume and Issue: 247, P. 118101 - 118101

Published: Jan. 15, 2024

Anaerobic digestion of agricultural waste can contribute to the European renewable energy needs. The 71% 20,000 anaerobic plants in operation already uses these agro-waste as feedstock; part be converted into two stage processes produce hydrogen and methane same plant. Biomethane enriched replace natural gas grids while contributing sector decarbonisation. Straw is most abundant residue (156 Mt/y) its conventional final fate uncontrolled soil disposal, landfilling, incineration or, best cases, composting. present research work focuses on fermentation spent mushroom bed, an lignocellulosic byproduct, composed mainly from wheat straw. substrate has been characterized semi-continuous tests were performed evaluating effect hydraulic retention time volatile fatty acids production. It was found that all confirmed feasibility process even this substrate, also, it identified HRT 4.0 d option optimize productivity (17.09 gCODVFAs/(KgVS*d)), 6.0 for (7.98 LH

Language: Английский

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Harnessing artificial intelligence for enhanced bioethanol productions: a cutting-edge approach towards sustainable energy solution

International Journal of Chemical Reactor Engineering, Journal Year: 2024, Volume and Issue: 22(7), P. 719 - 727

Published: July 1, 2024

Abstract The adoption of biofuels as an energy source has experienced a substantial increase, exceeding the consumption fossil fuels. shift can be ascribed to availability renewable resources for production and ecological advantages linked their utilisation. Nevertheless, due its intricate characteristics, process producing ethanol fuel from biomass poses difficulties in terms administration, enhancement, forecasting future results. To tackle these difficulties, it is crucial utilise modelling techniques like artificial intelligence (AI) create, oversee, improve bioethanol procedures. Artificial Neural Networks (ANN) prominent AI technique that offers significant systems’ pretreatment, fermentation, conversion stages. They are highly flexible accurate, making them particularly well-suited. This study thoroughly examines several used production, specifically focusing on research published past ten years. analysis emphasises importance using methods address complexities shows role enhancing efficiency sustainability biofuel industry.

Language: Английский

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Green energy breakthroughs: Harnessing nano-catalysts and enzymatic catalysts for bioenergy generation

Industrial Crops and Products, Journal Year: 2024, Volume and Issue: 215, P. 118527 - 118527

Published: April 27, 2024

Language: Английский

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Biohythane production via anaerobic digestion process: fundamentals, scale-up challenges, and techno-economic and environmental aspects

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(38), P. 49935 - 49984

Published: Aug. 1, 2024

Abstract Biohythane, a balanced mixture comprising bioH 2 (biohydrogen) and bioCH 4 (biomethane) produced through anaerobic digestion, is gaining recognition as promising energy source for the future. This article provides comprehensive overview of biohythane production, covering production mechanisms, microbial diversity, process parameters. It also explores different feedstock options, bioreactor designs, scalability challenges, along with techno-economic environmental assessments. Additionally, discusses integration into waste management systems examines future prospects enhancing efficiency applicability. review serves valuable resource researchers, engineers, policymakers interested in advancing sustainable renewable solution.

Language: Английский

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Anaerobic digestion of cyanobacterial biomass for plant fertilizer production on mars

Bioresource Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132383 - 132383

Published: March 1, 2025

A sustained presence on Mars requires the production of food site, but farming is limited by local availability suitable nutrients. Cyanobacteria can feed Martian resources, and we hypothesized that nutrients they mobilize could be extracted through anaerobic digestion used as crop fertilizer. We therefore tested abilities three microbial communities to digest biomass Anabaena sp. in minimal medium, 200 g L-1 regolith simulant (MGS-1), water. All produced ammonium removed organic carbon all media, especially medium MGS-1. However, MGS-1 also adsorbed organics reduced phosphate recovery efficiency. taxonomic analysis revealed a syntrophic fermentative community hydrogenotrophic methanogens were outcompeted sulfate-reducing bacteria. Overall, this study suggests viability bioprocess which support from resources.

Language: Английский

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Pilot-scale development of a semi-continuous system for biohythane production using hydrothermally pretreated mixed Napier grass and microalgae

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 127, P. 859 - 870

Published: April 17, 2025

Language: Английский

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Dark Fermentation and Anaerobic Digestion for H2 and CH4 Production, from Food Waste Leachates

Methane, Journal Year: 2025, Volume and Issue: 4(2), P. 11 - 11

Published: May 8, 2025

The present study investigates a two-stage process aimed at producing biogas from food waste leachates (FWL) through an experimental approach. first stage involves biohydrogen production via dark fermentation (DF), while the second focuses on biomethane anaerobic digestion (AD). substrate consists of derived fruit and vegetable waste, which are introduced into two continuous stirred-tank reactors (CSTR1) with different inoculum-to-substrate ratios (ISR). Dark occurs in these reactors. effluent CSTRs is then fed additional for methanogenesis. All operated under mesophilic conditions. During DF stage, hydrogen yields were relatively low, maximum 8.2 NmL H2/g VS added (ISR = 0.3) 6.1 0.5). These results attributed to limited biodegradation volatile solids (VS), reached only 21.9% 23.6% each respective assay. Similarly, removal organic matter was modest. In contrast, AD demonstrated more robust methane production, achieving 275.2 CH4/g 277.5 system exhibited significant degradation, biodegradability reaching 66%, COD efficiencies 50.8% 60.1% primary focus monitor quantify biofuels, biomethane. conclusion, this provides assessment biochemical conversion pathways, detailing generation valuable utilizable gaseous products. This research examines process-specific operational conditions governing gas optimizing parameters enhance yield overall efficiency.

Language: Английский

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Advancing Energy Recovery from Sugarcane Leaf via Two-Stage Anaerobic Digestion for Hydrogen and Methane Production: Impacts on Greenhouse Gas Mitigation and Sustainable Energy Production

Energies, Journal Year: 2023, Volume and Issue: 16(23), P. 7861 - 7861

Published: Nov. 30, 2023

This study aims to enhance energy recovery from sugarcane leaf (SCL) through two-stage anaerobic digestion (TSAD) for hydrogen and methane production. The influence of hydraulic retention time (HRT) on this process was investigated. Optimal conditions established batch experiments (5% total solids (TS) (w/v) rice straw compost inoculum) were applied in semi-continuous stirred tank reactors (CSTR-H2 CSTR-CH4). Remarkably, the highest production rates achieved with HRTs 5 days CSTR-H2 (60.1 mL-H2/L·d) 25 CSTR-CH4 (238.6 mL-CH4/L·d). Microbiological analysis by 16s rRNA sequencing identified Bacillus as predominant followed Lactobacillus Clostridium. Utilizing SCL TSAD could reduce greenhouse gas (GHG) emissions 2.88 Mt-CO2 eq/year, compared open-field burning, mitigate fossil-fuel-based power plants 228 kt-CO2 eq/year. research underscores potential efficient significant GHG emission reductions.

Language: Английский

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Significance of enzymes for the recycling of wasted non-food biomass to value added products: A sustainable stewardship towards the cleaner environment

Process Safety and Environmental Protection, Journal Year: 2024, Volume and Issue: 190, P. 395 - 412

Published: July 18, 2024

Language: Английский

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