scholarly journals Recent Advance in Anaerobic Co-digestion Technology: A Review

2020 ◽  
Vol 14 (6) ◽  
pp. 90
Author(s):  
Andriamahefasoa Rajaonison ◽  
Ives Abel Fetra Andriatsitohaina Rabesahala ◽  
Hery Tiana Rakotondramiarana
Keyword(s):  
Renewable Energy ◽  
Anaerobic Digestion ◽  
Fossil Fuels ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Operational Parameters ◽  
Biochemical Method ◽  
Substrate Degradation ◽  
Complex Technology ◽  
Made In

Due to their polluting characteristics, fossil fuels presently tend to be replaced by renewable energy resources. Anaerobic digestion is a recent technology for producing biofuels. As a biochemical method to produce biogas, it is more environmentally friendly than other processes and is almost non-polluting. The anaerobic co-digestion is an upgrade of the mono-digestion since some limitations of the single-substrate degradation were solved by digesting two or more substrates. The present review gives an overview of the progress made in the anaerobic co-digestion technology. Appearing as a complex technology, lots of factors can affect its operation. Those factors include the choice and the composition of the substrates, the ratio between the substrates and the inoculum, the pretreatment, the environmental conditions, the operational parameters, and the post-treatment at the end of the process. Analytical and empirical tools for the assessment of the whole system in terms of biodegradability and synergy of the substrates, the efficiency of the process, and the identification of the operation inhibitors are also presented in this paper.

scholarly journals Challenges and Future Prospects of Graphene Based Hybrids for Solar Fuel Generation: Moving Towards the Next Generation Photocatalysts

2021 ◽  
Author(s):  
Bramhaiah Kommula ◽  
Santanu Bhattacharyya
Keyword(s):  
Renewable Energy ◽  
Environmental Pollution ◽  
Fossil Fuels ◽  
Energy Resources ◽  
Energy Crisis ◽  
Next Generation ◽  
Renewable Energy Resources ◽  
Future Prospects ◽  
Solar Fuel ◽  
Global Energy

Considering the current global energy crisis and the most alarming environmental pollution issues, moving towards renewable energy resources instead of fossil fuels, should be the ultimate goal of modern civilization....

scholarly journals Exploring Renewable Energy Resources Using Remote Sensing and GIS—A Review

Resources ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 149 ◽  
Author(s):  
Avtar ◽  
Sahu ◽  
Aggarwal ◽  
Chakraborty ◽  
Kharrazi ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Renewable Energy ◽  
Case Studies ◽  
Fossil Fuels ◽  
Energy Resource ◽  
Remote Sensing And Gis ◽  
Energy Resources ◽  
Geographical Information ◽  
Renewable Energy Resources ◽  
The World

Renewable energy has received noteworthy attention during the last few decades. This is partly due to the fact that fossil fuels are depleting and the need for energy is soaring because of the growing population of the world. This paper attempts to provide an idea of what is being done by researchers in remote sensing and geographical information system (GIS) field for exploring the renewable energy resources in order to get to a more sustainable future. Several studies related to renewable energy resources viz. geothermal energy, wind energy, hydropower, biomass, and solar energy, have been considered in this paper. The focus of this review paper is on exploring how remote sensing and GIS-based techniques have been beneficial in exploring optimal locations for renewable energy resources. Several case studies from different parts of the world which use such techniques in exploring renewable energy resource sites of different kinds have also been included in this paper. Though each of the remote sensing and GIS techniques used for exploration of renewable energy resources seems to efficiently sell itself in being the most effective among others, it is important to keep in mind that in actuality, a combination of different techniques is more efficient for the task. Throughout the paper, many issues relating to the use of remote sensing and GIS for renewable energy are examined from both current and future perspectives and potential solutions are suggested. The authors believe that the conclusions and recommendations drawn from the case studies and the literature reviewed in the present study will be valuable to renewable energy scientists and policymakers.

scholarly journals Sustainable energy and fuels from biomass: a review focusing on hydrothermal biomass processing

2020 ◽  
Vol 4 (9) ◽  
pp. 4390-4414
Author(s):  
Koray Alper ◽  
Kubilay Tekin ◽  
Selhan Karagöz ◽  
Arthur J. Ragauskas
Keyword(s):  
Climate Change ◽  
Sustainable Development ◽  
Renewable Energy ◽  
Fossil Fuels ◽  
Sustainable Energy ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Environmental Challenges ◽  
Biomass Processing

Fossil fuels must be replaced with renewable energy resources to ensure sustainable development, reduce the dependence on fossil fuels, address environmental challenges including climate change.

scholarly journals The Renewable Sources of Energy and the Romanian Energy Security

2018 ◽  
Vol 24 (1) ◽  
pp. 58-64
Author(s):  
Ionuț Alin Cirdei
Keyword(s):  
Renewable Energy ◽  
Energy Security ◽  
Fossil Fuels ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Total Consumption ◽  
Renewable Sources ◽  
Fossil Energy ◽  
Long Time ◽  
Alternative Sources

Abstract Energy security is a matter of particular importance to all the world's states, whether they are producers or consumers of energy resources. For a long time, fossil energy resources have been the only source of energy used on a planetary scale. When mankind realized that fossil energy resources are a finite source of energy and that their intensive use causes many environmental problems, the most important of which is related to global warming, they have tried to find alternative sources of energy. Thus, concerns have arisen about the use of renewable energy on a wider scale, with both individual concerns of states that have potential in this area and collective concerns, such as at EU level, which has proposed by 2020, the share of energy from renewable sources used by the Union states is at least 20% of total consumption. Renewable energy resources may be an alternative to fossil fuels, but at the same time it has a number of limitations and vulnerabilities. Ensuring energy security means a comprehensive approach, understanding of limitations and reducing vulnerabilities

scholarly journals Microgrid: Innovation, Challenges and Prospects

2021 ◽  
Vol 9 (10) ◽  
pp. 484-489
Author(s):  
Zaineb Nisar Jan
Keyword(s):  
Renewable Energy ◽  
Fossil Fuels ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Distributed Energy ◽  
Energy Storage Devices ◽  
Dc Microgrid ◽  
Storage Devices ◽  
Microgrid Energy Management ◽  
Present World

Abstract: In the present world where environmental issues are posing a great threat to the survival of mankind a better yet effective way of reducing carbon emissions and improving the environment by less usage of fossil fuels was suggested. This approach was called microgrid (MG). Renewable energy resources could be used effectively to produce electricity and can be easily integrated with the conventional grid. This paper elaborates on the basic concept of microgrid, and then describes the challenges and future prospects of the microgrid. Distribution generators along with energy storage devices and proper interfacing power electronic devices are used. Working on the basis of the type of microgrid is also discussed in this paper. Keywords: Renewable energy resources, distributed energy, AC microgrid, DC microgrid, energy management.

Importance of Turning to Renewable Energy Resources with Hydrogen as a Promising Candidate and on-board Storage a Critical Barrier

2005 ◽  
Vol 895 ◽  
Author(s):  
Anne C. Dillon ◽  
Brent P. Nelson ◽  
Yufeng Zhao ◽  
Yong-Hyun Kim ◽  
C. Edwin Tracy ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Hydrogen Storage ◽  
Fossil Fuels ◽  
Storage System ◽  
The United States ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Hydrogen Storage System ◽  
World Energy ◽  
Storage Technologies

AbstractThe majority of the world energy consumption is derived from fossil fuels. Furthermore, the United States (US) consumption of petroleum vastly exceeds its production, with the majority of petroleum being consumed in the transportation sector. The increasing dependency on foreign fuel resources in conjunction with the severe environmental impacts of a petroleum-based society dictates that alternative renewable energy resources be developed. The US Department of Energy's (DOE's) Office of Energy Efficiency and Renewable Energy and the Office of Basic Energy Sciences are currently promoting a vehicular hydrogen-based energy economy. However, none of the current on-board storage technologies are suitable for practical and safe deployment. Significant scientific advancement is therefore still required if a viable on-board storage technology is to be developed. A detailed discussion of the benefits of transitioning to a hydrogen-powered automotive fleet as well as the tremendous technical hurdles faced for the development of an on-board hydrogen storage system are provided here. A novel class of theoretically predicted nanostructured materials that could revolutionize hydrogen storage materials is also presented.

Investigation of Rural Biogas Project in Northern Part of China

2011 ◽  
Vol 183-185 ◽  
pp. 668-672
Author(s):  
Yue Shi ◽  
Chang Ping Chen ◽  
Xiang Wen Sun
Keyword(s):  
Renewable Energy ◽  
Rural Areas ◽  
Questionnaire Survey ◽  
Fossil Fuels ◽  
Sustainable Use ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
The North ◽  
Environmental Friendly

Problems associated with non-sustainable use of fossil fuels have led to increased awareness and widespread research into the accessibility of new and renewable energy resources. As the renewable energy, biogas should be widely used for its advantages in environmental friendly, security and efficiency. But factors in policy and environment made the utilization of biogas hard to achieve in cold areas. This article focus on the problem, make conclusions and give advices based on the analysis of the example of China’s rural areas in the north. The exact information was obtained via questionnaire survey, aiming at promoting the utilization of biogas in cold areas.

scholarly journals HOW COULD RENEWABLE ENERGY RESOURCES BRIDGE THE GAP IN NIGERIA’S ENERGY SECTOR?

2020 ◽  
Vol 7 (11) ◽  
pp. 9-16
Author(s):  
Gift Nwabueze
Keyword(s):  
Renewable Energy ◽  
Cost Estimation ◽  
Power Plants ◽  
Fossil Fuels ◽  
Estimation Method ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Fiscal Incentives ◽  
Energy Projects ◽  
The Cost

This paper presents renewable energy resources development as a means of abating the shortfall in electricity generation in Nigeria. Levellized Bus-bar Cost Estimation method is used to carry out cost analysis of various power generation technologies by comparing their levellized costs. Carbon Emissions Pricing theory is also utilized to show that the cost per mega watt of renewable energy resources power plants can be comparable to their fossils counterpart when price is assigned to the emissions that result from using fossil fuels. Finally, government’s participation in time bound renewable energy projects, as well as financial and fiscal incentives are identified as actions that will encourage private sector investments in renewable energy development, which has a stimulating effect on the larger economy.

scholarly journals ANALYSIS OF PERSPECTIVES OF USING REED RESOURCES IN LATGALE REGION

2010 ◽  
Vol 1 (2) ◽  
pp. 68
Author(s):  
Edgars Čubars
Keyword(s):  
Renewable Energy ◽  
Renewable Resources ◽  
Fossil Fuels ◽  
Fossil Fuel ◽  
Global Climate ◽  
Measurement Methods ◽  
Energy Resources ◽  
Limited Resources ◽  
Renewable Energy Resources ◽  
Increasing Demand

Increasing demand for energy, limited resources of fossil fuel, as well as pollution of the environment and changes of the global climate, have raised more interest in renewable resources. Support to the use of renewable resources has become a very important part of the European Union’s policy. The use of reeds like renewable energy resources allows saving fossil fuels. This paper presents the findings on the reed resources in lakes of Latgale (region in Latvia). The investigation of reed resources shows that the resources in the region are situated in a very uneven way. The greatest amount of reed resources is concentrated in the biggest lake in Latvia - Lubana Lake as well as near it. Using direct measurement methods and metering in the distance, it was stated that the total reed resources of Lubana Lake are 8,203? 2,999 tons, occupy 882 hectares and are situated in 429 reed blocks. Summary resources of Latgale region are 19,862? 7,409 tons. The amount of heat that can be obtained using reed resources of Latgale region is equivalent to 10,543 tons of natural gas or 8,802 tons of petroleum, or 13,092- 21,348 tons of coal (it depends on the heating of coal), or 7,675 tons of fuel, or 8,712 – 12,199 tons of oil (depends on the heating of oil).

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