Biogas as an alternative source of decentralized bioelectricity for large waste producers: An assessment framework at the University of São Paulo

D’Aquino, Camila Agner; Santos, Sydney Ferreira; Sauer, Ildo Luís

doi:10.1016/j.energy.2021.122326

Cited by 3 publications

(4 citation statements)

References 32 publications

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“…In this process, high temperatures between 700 and 800 °C are used to break down solid biomass at high pressure in an oxygen-deficient environment. This process converts biomass into a mixture of gases, consisting of CO 2 , H 2 , and CH 4 often collectively called syngas [94,125]. Syngas is cleaned to remove corrosive and acidic constituents.…”

Section: Thermal Gasification Of Solid Biomass Followed Bymentioning

confidence: 99%

Biogas Production and Applications in the Sustainable Energy Transition

2022

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Biogas is competitive, viable, and generally a sustainable energy resource due to abundant supply of cheap feedstocks and availability of a wide range of biogas applications in heating, power generation, fuel, and raw materials for further processing and production of sustainable chemicals including hydrogen, and carbon dioxide and biofuels. The capacity of biogas based power has been growing rapidly for the past decade with global biogas based electricity generation capacity increasing from 65 GW in 2010 to 120 GW in 2019 representing a 90% growth. This study presents the pathways for use of biogas in the energy transition by application in power generation and production of fuels. Diesel engines, petrol or gasoline engines, turbines, microturbines, and Stirling engines offer feasible options for biogas to electricity production as prme movers. Biogas fuel can be used in both spark ignition (petrol) and compression ignition engines (diesel) with varying degrees of modifications on conventional internal combustion engines. In internal combustion engines, the dual-fuel mode can be used with little or no modification compared to full engine conversion to gas engines which may require major modifications. Biogas can also be used in fuel cells for direct conversion to electricity and raw material for hydrogen and transport fuel production which is a significant pathway to sustainable energy development. Enriched biogas or biomethane can be containerized or injected to gas supply mains for use as renewable natural gas. Biogas can be used directly for cooking and lighting as well as for power generation and for production of Fischer-Tropsch (FT) fuels. Upgraded biogas/biomethane which can also be used to process methanol fuel. Compressed biogas (CBG) and liquid biogas (LBG) can be reversibly made from biomethane for various direct and indirect applications as fuels for transport and power generation. Biogas can be used in processes like combined heat and power generation from biogas (CHP), trigeneration, and compression to Bio-CNG and bio-LPG for cleaned biogas/biomethane. Fuels are manufactured from biogas by cleaning, and purification before reforming to syngas, and partial oxidation to produce methanol which can be used to make gasoline. Syngas is used in production of alcohols, jet fuels, diesel, and gasoline through the Fischer-Tropsch process.

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Section: Thermal Gasification Of Solid Biomass Followed Bymentioning

confidence: 99%

Biogas Production and Applications in the Sustainable Energy Transition

2022

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“…Departing from its purpose, this study combines quantitative and qualitative approaches to provide the mapped potential of bioenergy from biogas in São Paulo's slums, divided into districts, based on the extrapolation of results obtained by [26]. First, quantitative data was used to determine and analyze (i) the location and geographic distribution of the inhabitants living in slums per district, (ii) the generation and geographic distribution of OFWSM in the slums and its bioenergy potential, considering the biogas production, and (iii) the environmental impact of using biogas to treat OFMSW, in terms of mitigation of CO 2 emissions.…”

Section: Methodsmentioning

confidence: 99%

“…E E represents the electricity generation, in kW/y; V CH4 , the volume of produced methane, 113.79 Nm 3 /t substrate [26]; Re CH4 as the lower calorific value of methane; η e represents the CHP electrical efficiency. The installed capacity (IC) can be determined from Equation (4), considering 7884 as the system's operating hours in a year (capacity factor of 90%).…”

Section: Bioelectricity Potential Assessmentmentioning

confidence: 99%

“…Other important product of the biogas chain is the digestate, considered as a suitable biofertilizer that can replace the mineral fertilizer, improving the soil fertility, and vegetable production yield [44]. Each ton of food waste can generate 0.09 tons of dry biofertilizer [26,45], which means a potential of 20,066 tons of biofertilizer that could be used to produce food in urban areas, which impacts positively on food security, biodiversity, climate change and public healthy [46].…”

Section: Bioelectricity Potential In Slums and Its Integration Into T...mentioning

confidence: 99%

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Biogas Potential from Slums as a Sustainable and Resilient Route for Renewable Energy Diffusion in Urban Areas and Organic Waste Management in Vulnerable Communities in São Paulo

et al. 2022

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Slums are populated poor areas inside urban centers, mostly deprived of good-quality public services and exposed to inappropriate waste disposal and energy poverty. Using the organic fraction waste from these communities to generate high value-added products, including electricity, heat, and fertilizer, provides a circular bioeconomy with mitigation of greenhouse gas emissions, reducing environmental pollution and diseases. The present study aimed to demonstrate the feasibility of producing bioelectricity from the biogas obtained through the anaerobic digestion of the 400,000 tons of food waste generated in São Paulo’s slums, the largest city in Latin America. The biogas potential was calculated using results obtained from previous studies, expanded to the slums, mapped, and discussed the environmental impact of waste mismanagement and the renewable energy source (RES) integration into the local energy system. The results show a bioelectricity potential of up to 147,734 MWh/y, representing 1.3% of the residential electricity demand with an associated potential reduction of 2111.7 CO2eq Gg/y.

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