Geothermal Energy Valorisation for Enhanced Biogas Production from Agro-Industrial Residues

Diamantis, Vasileios; Tataki, Vasiliki; Eftaxias, Alexandros; Iliadis, Georgios; Aivasidis, A.

doi:10.1007/s40710-016-0182-y

Cited by 12 publications

(4 citation statements)

References 17 publications

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“…The biogas (methane) yield is another important value to evaluate the performance of biogas generation. , According to this value, the biogas (methane) production per substrate utilization (COD degradation in food waste hydrolysate) can be evaluated. The biogas (methane) yield during the whole anaerobic digestion process is shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

Fast Startup of Semi-Pilot-Scale Anaerobic Digestion of Food Waste Acid Hydrolysate for Biogas Production

Huang

Zhao

Guo

et al. 2017

J. Agric. Food Chem.

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In this study, a fast startup of semi-pilot-scale anaerobic digestion of food waste acid hydrolysate for biogas production was carried out for the first time. During the period of fast startup, more than 85% of chemical oxygen demand (COD) can be degraded, and even more than 90% of COD can be degraded during the later stage of anaerobic digestion. During this anaerobic digestion process, the biogas yield, the methane yield, and the CH content in biogas were 0.542 ± 0.056 m/kg, 0.442 ± 0.053 m/kg, and 81.52 ± 3.05%, respectively, and these values were high and stable. Besides, the fermentation pH was very stable, in which no acidification was observed during the anaerobic digestion process (outlet pH was 7.26 ± 0.05 for the whole anaerobic digestion). Overall, the startup of this anaerobic digestion can be completed in a short period (the system can be stable 2 days after the substrate was pumped into the bioreactor), and anaerobic digestion of food waste acid hydrolysate is feasible and attractive for industrial treatment of food waste and biogas production.

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Section: Resultsmentioning

confidence: 99%

Fast Startup of Semi-Pilot-Scale Anaerobic Digestion of Food Waste Acid Hydrolysate for Biogas Production

Huang

Zhao

Guo

et al. 2017

J. Agric. Food Chem.

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“…Having secured a CO 2 store, local DACCS and BECCS projects (including from anaerobic digestion) become viable (e.g., McGeever et al, 2019). Moreover, industrial heat from the geothermal plant can improve anaerobic digestion performance significantly (e.g., Diamantis et al, 2016), as well as reduce the costs of DACCS operations. Anaerobic digestion supplemented by geothermal heat may produce ∼23% more natural gas while reducing GHG emissions by ≤66% and capital costs by ∼24% (Nazari et al, 2021).…”

Section: Project Conceptmentioning

confidence: 99%

Geological carbon storage in northern Irish basalts: prospectivity and potential

Andrews

2023

Front. Clim.

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Carbon mineralization and storage in basaltic rock sequences is a developing technology but faces challenges with uptake and increases in scale. Northern Ireland (UK) is a useful analog for many parts of the world where thick basalt sequences could be used to aid in reaching carbon reduction and removal targets. Here I reanalyze and reinterpret available lithological, geochemical, and geophysical data to assess carbon storage potential. The physical and geochemical properties of the basalts are indistinguishable from those used for successful carbon sequestration in Iceland and Washington State (USA). Based on the thickness, composition, and potential permeability, I propose that this is a viable location for a series of small-volume stores (total volume ~9–12 MTCO2) suitable for capture at industrial point-sources or purpose-built CO2 “harvesting” facilities. The case for exploiting the CO2 storage potential in Northern Ireland is strengthened by (1) an increasingly urgent need to find socially and economically just decarbonization pathways needed to meet NI's targets, (2) increasing realization among policy experts that point-source CO2 capture and industrial decarbonization will be insufficient to meet those goals, due in part, to the size of the agricultural sector, and (3) the coincidence with plentiful renewable energy and geothermally-sourced industrial heat. These serendipitous relationships could be leveraged to develop CO2-“farms” where direct air capture operations are supplied by renewable energy (biomass and geothermal) and on-site geological storage. I envisage that these sites could be supplemented by CO2 from locally produced biomass as farmers are encouraged to transition away from raising livestock. Because CO2 can be captured directly from the atmosphere or via suitable biomass anywhere, NI's small size and position on the periphery of the UK and Europe need not be a disadvantage. Instead, NI's access to geological storage, renewable energy, and agricultural land may be a boon, and provide new opportunities to become a leader in carbon removal in basalt-covered regions.

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“…9.1.5. Geothermal Energy Diamantis et al [190] designed and constructed an 8 m 3 anaerobic digester fed by different organic wastes and supplied by geothermal energy. The system is heated by a low enthalpy geothermal fluid (50-60 • C) at the desired temperature of 35-40 • C. Geothermal energy is an interesting solution for digester thermal demand thanks to its characteristics.…”

Section: Solar Thermal and Sofc Energymentioning

confidence: 99%

A Review of the State of the Art of Biomethane Production: Recent Advancements and Integration of Renewable Energies

et al. 2021

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Anaerobic Digestion (AD) is a well-established process that is becoming increasingly popular, especially as a technology for organic waste treatment; the process produces biogas, which can be upgraded to biomethane, which can be used in the transport sector or injected into the natural gas grid. Considering the sensitivity of Anaerobic Digestion to several process parameters, mathematical modeling and numerical simulations can be useful to improve both design and control of the process. Therefore, several different modeling approaches were presented in the literature, aiming at providing suitable tools for the design and simulation of these systems. The purpose of this study is to analyze the recent advancements in the biomethane production from different points of view. Special attention is paid to the integration of this technology with additional renewable energy sources, such as solar, geothermal and wind, aimed at achieving a fully renewable biomethane production. In this case, auxiliary heat may be provided by solar thermal or geothermal energy, while wind or photovoltaic plants can provide auxiliary electricity. Recent advancements in plants design, biomethane production and mathematical modeling are shown in the paper, and the main challenges that these fields must face with are discussed. Considering the increasing interest of industries, public policy makers and researchers in this field, the efficiency and profitability such hybrid renewable solutions for biomethane production are expected to significantly improve in the next future, provided that suitable subsidies and funding policies are implemented to support their development.

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Geothermal Energy Valorisation for Enhanced Biogas Production from Agro-Industrial Residues

Cited by 12 publications

References 17 publications

Fast Startup of Semi-Pilot-Scale Anaerobic Digestion of Food Waste Acid Hydrolysate for Biogas Production

Fast Startup of Semi-Pilot-Scale Anaerobic Digestion of Food Waste Acid Hydrolysate for Biogas Production

Geological carbon storage in northern Irish basalts: prospectivity and potential

A Review of the State of the Art of Biomethane Production: Recent Advancements and Integration of Renewable Energies

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