Optimal operating conditions for maximum biogas production in anaerobic bioreactors

Balmant, Wellington; Oliveira, Brás Heleno de; Mitchell, David A.; Vargas, J.V.C.; Ordóñez, Juan C.

doi:10.1016/j.applthermaleng.2013.09.033

Cited by 16 publications

(5 citation statements)

References 12 publications

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“…1-based distributed parameter model of an anaerobic reactor for upflow anaerobic sludge bet rector. Balmanta et al (2014) demonstrated the existence of optimal HRT and inlet mass flow rate of feedstocks for maximum biogas production through numerical simulations performed with a general transient mathematical model of an anaerobic digester introduced in this study.…”

Section: Process Modeling Monitoring and Control Of Biogas Productionmentioning

confidence: 91%

Decentralized Biogas Technology of Anaerobic Digestion and Farm Ecosystem: Opportunities and Challenges

Wang

2014

Front. Energy Res.

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Long-term economic and environmental concerns have resulted in a great amount of research on renewable sources of biomass and bioenergy to replace fossil fuels in the past decades. Decentralized biogas technology is one of the most potential technologies of biomass and bioenergy by using agricultural waste materials (e.g., animal manure, crop straw, and by-products from food industries) as feedstocks. By-products from biogas production, called digestate, are nutrient rich, which could potentially be reused as green fertilizers in agriculture, thereby providing a sustainable substitute for synthetic fertilizers for farm ecosystem. Thus, the biogas production of anaerobic digestion is win-win option for livestock and crop producers to address issues of waste management and energy supply, and to avoid contamination of surface and ground waters and emissions of odors and greenhouse gases. In this paper, we review biogas production technology and then evaluate environmental effects of digestate used as fertilizer. Finally, we discuss issues of deployment of decentralized biogas technology for farm ecosystem. Economic and technological barriers still exist for large scale deployment of biogas technology in rural region. Two national scale deployments in China and Nepal showed that the operational status of biogas digesters is not optimal and up to 50% of plants are non-functional after a short operation period regardless of the social and economic factors. Main barriers are a wide variation of feedstocks and environmental conditions (e.g., temperature) over space and time. It becomes clear that the experimental conditions of the pilot plants need to be adjusted and calibrated to the local feedstocks and climate. Also, more research needs to be done in cold fermentation technology. Thus, collaboration of all relevant designers, farmers, stakeholders, and regulators is proposed as the way forward, particularly as their complexity has been identified as the major hurdle to the implementation of decentralized biogas production, which can deliver beneficial synergies for the decentralized biogas production in rural region responsible for food production and waste management.

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Section: Process Modeling Monitoring and Control Of Biogas Productionmentioning

confidence: 91%

Decentralized Biogas Technology of Anaerobic Digestion and Farm Ecosystem: Opportunities and Challenges

Wang

2014

Front. Energy Res.

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“…Carbon dioxide accounts for 95% of it, while hydrogen and other trace compounds add up to 3% . It is possible to produce biogas from a combination of commercial and agricultural waste, animal manure, straw, and domestic sewage, and it contains roughly 50–70% methane, 25–50% CO 2 , and 1–5% hydrogen and is an environmentally sustainable fuel for vehicles. − Biogas can be substitute for natural gas and is used in place of natural gas. The findings demonstrate that the physical and chemical properties of gasoline and biogas are compared.…”

Section: Various Alternative Fuels (Afs) Instead Of Gasoline In Si En...mentioning

confidence: 99%

Performance and Emission Characteristic Analysis of a Gasoline Engine Utilizing Different Types of Alternative Fuels: A Comprehensive Review

2021

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Gasoline is a liquid composed of hydrocarbons, refined from crude petroleum, and characterized by a boiling point. It is difficult to regularly refine these oils, and their scarcity in natural resources makes it problematic to refine them. Gasoline engines produce fewer toxic emissions, like NO x , CO, and CO 2 . On the basis of economical and natural concerns, gasoline can be put back by many alternative fuels. It can be powered by alternative energy sources, like hydrogen, natural gas, ethanol, acetylene, propane, biogas, etc. The performance of these types of fuels in an internal combustion engine is very charming and appropriate for nature. Hydrogen is sustainable, and the amount of energy necessary to create hydrogen is small. Hydrogen engines are more prominent at approximately 30% compared to gasoline engines in terms of direct injection. Ethanol causes 80% less CO emissions after it has been properly blended with gasoline. Natural gas fueling stations are expanding in popularity. After the natural gas percentage is increased in the fuel, high efficiency is achieved at a sustainable performance in the 0.7−0.9 equivalent ratio. (G + 1000 g/h acetylene) has a higher brake thermal efficiency (G + 500 g/ h acetylene). These vehicles, after all, have seen considerable increases in terms of fuel economy, total performance, and substantially reduced emission standards. This study aims to compare various alternative fuels with gasoline by analyzing their availability, engine tests, toxic element emissions, price, etc. Furthermore, a selection criterion for alternative fuel is given in various measuring scales that will be helpful for choosing alternative fuels because fossil fuels are running out.

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“…Biogas presents as a renewable gaseous fuel, which can be obtained by anaerobic digestion from several sources [8]. It is composed mainly of methane, CO 2 , and small proportions of other components like hydrogen, oxygen, nitrogen and hydrogen sulfide.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of ignition timing and supercharging effects on a gasoline engine fueled with synthetic gases extracted from biogas

Arroyo

Moreno

Muñoz

et al. 2015

Energy Conversion and Management

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Optimal operating conditions for maximum biogas production in anaerobic bioreactors

Cited by 16 publications

References 12 publications

Decentralized Biogas Technology of Anaerobic Digestion and Farm Ecosystem: Opportunities and Challenges

Decentralized Biogas Technology of Anaerobic Digestion and Farm Ecosystem: Opportunities and Challenges

Performance and Emission Characteristic Analysis of a Gasoline Engine Utilizing Different Types of Alternative Fuels: A Comprehensive Review

Experimental study of ignition timing and supercharging effects on a gasoline engine fueled with synthetic gases extracted from biogas

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