scholarly journals Possibilities of Energy Generation from Olive Tree Residues, by-products and Waste in Crete, Greece

2017 ◽  
Vol 5 (4) ◽  
pp. 110
Author(s):  
John Vourdoubas
Keyword(s):  
Power Generation ◽  
Fossil Fuels ◽  
Energy Use ◽  
Energy Content ◽  
Biogas Production ◽  
Energy Generation ◽  
Olive Tree ◽  
Tree Biomass ◽  
Energy Potential ◽  
By Products

The objective of the current work is the investigation of the current utilization of olive tree residues, by-products and waste for energy generation in Crete and their future prospects. The quantity of olive tree biomass in Crete has been estimated and its potential for energy generation has been calculated. Possibilities for using it for heat production, power generation, biogas production, pellet manufacturing and fermentable sugar production have been investigated. Experiences in other olive oil producing countries have been recorded together with the technologies used or experimented with so far. The energy potential of olive tree biomass in Crete has been estimated at 24.05 % of the TPES supply in the island. The only highly utilized olive tree by-product for heat generation by combustion in Crete is the olive kernel wood. Olive tree pruning have the highest energy content but they are underutilized in Crete. Their successful utilization in other countries for pellet manufacturing and power generation indicates that their exploitation should be promoted in Crete. The results of this study indicate that olive tree cultivation in Crete, apart from producing a high nutritional edible product, generates residues, by-products and waste which if properly utilized could contribute in the reduction of fossil fuels used and the carbon footprint due to energy use in the island.

scholarly journals Biogas Potential Assessment of the Composite Mixture from Duckweed Biomass

2021 ◽  
Vol 14 (1) ◽  
pp. 351
Author(s):  
Alexander Chusov ◽  
Vladimir Maslikov ◽  
Vladimir Badenko ◽  
Viacheslav Zhazhkov ◽  
Dmitry Molodtsov ◽  
...  
Keyword(s):  
Fossil Fuels ◽  
Energy Use ◽  
Aquatic Vegetation ◽  
Biogas Production ◽  
Lemna Minor ◽  
International Energy Agency ◽  
Energy Potential ◽  
Energy Agency ◽  
Residual Biomass ◽  
Composite Mixture

The article presents the research results of anaerobic digestion processes in bioreactors of composite mixtures based on initial and residual biomass of Lemna minor duckweed and additives: inoculum (manure), food waste, and spent sorbents to determine biogas potential (biogas volume, methane content). Duckweed Lemna minor, which is widespread in freshwater reservoirs, is one of the promising aquatic vegetation species for energy use. Residual biomass is obtained by chemically extracting valuable components from the primary product. The purpose of the research was to evaluate the possibility of the energy potential of residual biomass of Lemna minor to reduce the consumption of fossil fuels and reduce greenhouse gas emissions. This is in line with the International Energy Agency (IEA) scenarios for the reduction of environmental impact. The obtained results confirm the feasibility of using this type of waste for biogas/biomethane production. The recommendations on the optimal composition of the mixture based on the residual biomass of Lemna minor, which will allow for an increase in biogas production, are given. The obtained data can be used in the design of bioreactors.

scholarly journals Verification of the Green Microalgae Biomass Use for Biogas Production

2019 ◽  
Vol 16 (1) ◽  
pp. 15-19
Author(s):  
Natalia Głowacka ◽  
Ján Gaduš
Keyword(s):  
Fossil Fuels ◽  
Slovak Republic ◽  
Anaerobic Fermentation ◽  
Biogas Production ◽  
Raw Material ◽  
Green Microalgae ◽  
Energy Potential ◽  
Research Results ◽  
Microalgae Biomass ◽  
The World

Abstract The article reviews the energy potential of microalgae as an alternative raw material for anaerobic digestion. Currently, energy security is one of the main topics among researchers. The amount of generated fossil fuels is limited, it is a question of time when fossil fuels will not continue to be accessible at low cost. There is a need to find an alternative carrier of energy which will replace the fossil fuels in the World. Green microalgae can be proposed as a possible bio raw-material, which can be used as an input material in order to produce energy. Lots of alternative technologies of algae cultivation are currently being developed all over the world. There is a necessity to search for a sensible way to produce algal biomass for bioenergy purposes, while maintaining all requirements involved in environmental and economic issues. The research results presented in the science article show that microalgae biomass is the proper alternative material for biogas production with the method of anaerobic fermentation. We believe that these research results can contribute to the future development of all forms of renewable energy in the Slovak Republic.

POTENTIAL OF AGRICULTURAL BIOMASS FOR ENERGY PRODUCTION PURPOSES IN LUBELSKIE PROVINCE

2017 ◽  
Vol XIX (3) ◽  
pp. 98-103
Author(s):  
Anna Jędrejek ◽  
Zuzanna Jarosz
Keyword(s):  
Thermal Energy ◽  
Energy Production ◽  
Biogas Production ◽  
High Energy ◽  
Plant Production ◽  
Energy Potential ◽  
Agricultural Biomass ◽  
By Products ◽  
Biomass For Energy

The purpose of this paper was to estimate biomass and by-products from plant production (straw, hay, natural fertilizer) in Lubelskie province, as well as demonstrate energy potential possible to obtain from maize as a co-substrate for biogas production. The estimates and related assumptions show that this region has a high energy potential amounting to 26 966.6 TJ/year, which can be gain from biomass and by-products from plant production. The area also possesses significant sources of potential for agricultural biogas production and can provide 195 350.8 dam3/year biogas, which may be converted into thermal energy – 5586.4 TJ/year or electricity – 1241 GWh/year.

scholarly journals Potential Energy Production from Citrus Pulp and Olive Pomace: A Case Study in a Region of Mediterranean Basin

2018 ◽  
Author(s):  
Francesca Valenti ◽  
Simona M.C. Porto ◽  
Paolo Lanteri ◽  
Claudia Arcidiacono
Keyword(s):  
Fossil Fuels ◽  
Agricultural Sector ◽  
Biogas Production ◽  
Olive Pomace ◽  
Citrus Pulp ◽  
Biomass Resources ◽  
Biogas Plants ◽  
Olive Cultivation ◽  
Suitable Area ◽  
By Products

The necessity to investigate suitable alternatives to conventional fossil fuels has developed the interests in many renewable energy alternatives, especially biomass resources which are widely available and allow to reach both environmental and socio-economic improvements. Among the bioenergy solutions the anaerobic digestion technology makes it possible to produce biogas by reusing and valorising agricultural residues and by-products. In Southern Italy, to date, the development of biogas sector is still very limited, despite the importance of the agricultural sector, especially of citrus and olive cultivation. For this reason, in previous studies the availability of two by-products, i.e., citrus pulp and olive pomace, was analysed in order to choose the most suitable area for a sustainable development of new biogas plants according to the new Biogasdoneright concept. In this paper, after a resume of the multi-step methodology which allowed the computation of biogas production, it was demonstrated that 15.9 GWh-e electricity and 24.5 GWh-e heat per year could be generate by reusing only these two kind of by-products, and could satisfy approximate 17% of the total electricity demand of the agricultural sector (90.2 GWh-e/year) in Catania.

Energy self-reliance, net-energy production and GHG emissions in Danish organic cash crop farms

2008 ◽  
Vol 23 (1) ◽  
pp. 30-37 ◽  
Author(s):  
N. Halberg ◽  
R. Dalgaard ◽  
J.E. Olesen ◽  
T. Dalgaard
Keyword(s):  
Energy Production ◽  
Fossil Fuels ◽  
Energy Use ◽  
Nutrient Management ◽  
Biogas Production ◽  
Ghg Emissions ◽  
Net Energy ◽  
Pig Slurry ◽  
Cash Crop ◽  
Crop Fields

AbstractOrganic farming (OF) principles include the idea of reducing dependence of fossil fuels, but little has been achieved on this objective so far in Danish OF. Energy use and greenhouse gas (GHG) emissions from an average 39 ha cash crop farm were calculated and alternative crop rotations for bio-energy production were modeled. Growing rapeseed on 10% of the land could produce bio-diesel to replace 50–60% of the tractor diesel used on the farm. Increasing grass-clover area to 20% of the land and using half of this yield for biogas production could change the cash crop farm to a net energy producer, and reduce GHG emissions while reducing the overall output of products only marginally. Increasing grass-clover area would improve the nutrient management on the farm and eliminate dependence on conventional pig slurry if the biogas residues were returned to cash crop fields.

Geothermal energy potential of sedimentary formations in the Athabasca region, northeast Alberta, Canada

2016 ◽  
Vol 4 (4) ◽  
pp. SR19-SR33 ◽  
Author(s):  
Elahe P. Ardakani ◽  
Douglas R. Schmitt
Keyword(s):  
Thermal Energy ◽  
Geothermal Energy ◽  
Oil Sands ◽  
Fossil Fuels ◽  
Greenhouse Gas Emission ◽  
Energy Content ◽  
Regional Scale ◽  
Heat Extraction ◽  
Sequential Gaussian Simulation ◽  
Energy Potential

The Athabasca region, located in the northeast of Alberta, Canada, hosts many ongoing projects of bitumen extraction from oil sands and Devonian carbonate and siliciclastic reservoirs, which require a vast amount of thermal energy. Geothermal energy as a green renewable source of heat can help to reduce the amount of fossil fuels used to provide the required thermal energy for these projects and consequently decrease the greenhouse gas emission. To assess the geothermal development potential in this region, an integrated regional-scale 3D model was constructed with geologic and geophysical data (approximately 7000 formation tops and approximately 800 km seismic 2D profiles). Incorporation of 2D seismic profiles that filled in the gaps between sparse geologic tops particularly for deeper formations adds to structural details of the modeled formations. The temperature and porosity fields were simulated using the sequential Gaussian simulation approach within the modeled sedimentary formations. Based on spatial distribution, thickness, formation porosity and permeability analysis, five Paleozoic formations of Keg River, Waterways, Cooking Lake, Leduc, and Grosmont were identified as potential aquifers for geothermal development. These aquifers have enough coverage and thickness in the area and possess a high amount of thermal energy content. Because the sedimentary basin in the Athabasca region is quite shallow (less than 1400 m), these aquifers are all recognized as low enthalpy geothermal reservoirs with maximum of 40°C temperature and hence direct heating applications are not feasible. Use of industrial-scale heat-pump technologies that have long been used in northern Europe with high coefficients of performance would be recommended for heat extraction from these reservoirs.

scholarly journals Renewable energy Sector in Gujarat, India

2021 ◽  
Vol 23 (06) ◽  
pp. 1128-1140
Author(s):  
Zahira Tabassum ◽  
◽  
Dr.Chandrashekhar Shastry ◽  
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Power Systems ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Energy Generation ◽  
Energy Sources ◽  
Energy Integration ◽  
Energy Share ◽  
Renewable Energy Generation

Excessive use of traditional energy sources such as fossil fuels has resulted in significant environmental deterioration. India is one of the world’s fastest-growing energy consumers, and it is making continual efforts to increase renewable energy generation. The use of renewable energy sources to generate electricity is expanding every day. Renewable energy integration with existing power systems is a difficult endeavor that necessitates strategy and development. Climate-friendly energy systems will result from the use of renewable energy sources in power generation, as they lower CO2 emissions caused by fossil fuels used in conventional power generation. This research looks at a renewable energy scenario using Gujarat as a case study, which is a leader in renewable energy generation. The policies taken by the Gujarat government to increase renewable energy’s participation in the energy mix, as well as the challenges and potential solutions for boosting the deployment of renewable energy sources across Gujarat, are discussed. This study can be used as a guide for policymakers and researchers in other states and around the world who want to boost renewable energy share.

scholarly journals Anaerobic Digestion of Biomass for production of Biogas: Progress and Advantages

2020 ◽  
Vol 6 (5) ◽  
pp. 108-111
Author(s):  
Kumar Gaurav
Keyword(s):  
Renewable Energy ◽  
Anaerobic Digestion ◽  
Fossil Fuels ◽  
Biogas Production ◽  
Energy Requirement ◽  
Renewable Energy Sources ◽  
Agricultural Waste ◽  
Energy Generation ◽  
Primary Energy ◽  
Energy Sources

A major share of world’s primary energy requirement is dependent on fossil fuels which is not only a non renewable source of energy and on the verge of extinction but also associated with serious environmental concerns. To combat these issues, alternative renewable energy sources are required. Certain examples of renewable energy sources are solar energy, wind energy, hydro and thermal energy, biofuels etc. Biomass is one such alternative which is freely and abundantly available. It is mainly the agricultural waste and vegetable waste which are perishable and create a lot of nuisance. Tapping this biomass for energy production will be beneficial in two ways; it will be an excellent source of energy generation and it will also help in waste management for environment protection. Energy generation from Biomass can take place either chemically or thermo-chemically. In the present paper advantages of anaerobic digestion of biomass are discussed for biogas production.

scholarly journals Assessment of solar energy potential and development in Afghanistan

2021 ◽  
Vol 239 ◽  
pp. 00012
Author(s):  
Ahmad Tamim Mehrad
Keyword(s):  
Power Generation ◽  
Solar Energy ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Supply And Demand ◽  
Energy Sources ◽  
Energy Potential ◽  
Energy Needs ◽  
Energy Shortage

Energy generation in Afghanistan is limited and heavily dependent on fossil fuels and imported electricity. Due to rapid population growth and progress in the industry, services, and agriculture sectors, the existing energy sources are not fulfilling the current energy needs of the country. Meanwhile, there is a big gap between power supply and demand, which led to an energy shortage in Afghanistan. Consequently, there is a need to develop power generation and assure energy sustainability by concentrating on renewable energy sources. This paper aims to analyze the theoretical, practical, and economic potential of solar energy in Afghanistan with the main focus on PV power technology. Power generation from solar sources is theoretically, practically, and economically suitable for Afghanistan and can be a perfect solution for the energy shortage in the country. The Afghan government should consider developing solar energy as a priority for energy security, socio-economic development, and improving the quality of life in Afghanistan.

scholarly journals Biomass energy potential of coconut varieties in Guyana

2019 ◽  
Vol 5 (2) ◽  
pp. 97 ◽  
Author(s):  
Bibi Abrahim ◽  
Oudho Homenauth
Keyword(s):  
Renewable Energy ◽  
Energy Content ◽  
Energy Generation ◽  
Biomass Energy ◽  
Energy Output ◽  
Waste Materials ◽  
Energy Potential ◽  
Energy Value ◽  
Coconut Shells ◽  
Biomass For Energy

Guyana’s growing coconut industry has great potential for the generation of renewable energy using its waste materials currently discarded unsustainably. This study sought to investigate the energy potential of husks and shells of three common coconut varieties grown in Guyana. In this experiment, samples of coconut husks and shells were subjected to proximate, ultimate and calorific analyses. These analyses indicated that the energy value of the husks and shells of tall and dwarf coconuts were high, confirming the findings presented in previous studies. It was found that coconut shells have a higher energy content as opposed to the husk, mainly due to the presence of lignin and cellulose and a lower moisture content. The shell of one of the dwarf varieties (firmer and thinner) produced the greatest energy output. The coconut husks, however, followed closely where the tall variety reported the greatest energy value. Based on the energy output of the waste materials, possible energy, power, carbon, diesel and price savings were determined, if energy conversion is to be implemented. The analyses show substantial benefits for the country with respect to waste management, carbon emissions and costs, indicating the need for energy generation from coconut waste. A proposed gasification-pyrolysis system was developed and provided a baseline for the use of coconut biomass for energy generation in Guyana.

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