scholarly journals Characteristic Biofuel Microalgae Chlorella sp. as Renewable Energy Source

2020 ◽  
Vol 190 ◽  
pp. 00002
Author(s):  
Anggra Fiveriati ◽  
Yeddid Yonatan ◽  
Olga Anne ◽  
Praptiningsih Gamawati Adinurani
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Alternative Energy ◽  
Dry Weight ◽  
The Other ◽  
National Standard ◽  
Heating Value ◽  
High Productivity ◽  
Chlorella Sp ◽  
The World

World consumption of energy is estimated to increase by 49 % from 2007 to 2035, which means averagely 1.4 % yr–1. Many countries in the world began to develop alternative energy that can overcome the resources. Microalgae is one of the renewable energy that has excellent potential for making biodiesel because it contains much oil. Microalgae is the fastest organism in the photosynthesis, so it makes microalgae have high productivity. In this article, researchers use Chlorella sp. because these microalgae contain oil up to 28 % to 32 % from its dry weight, and on the other hand, this type of microalgae is easy to grow and easy to harvest. From the experimental results, the density characteristics of biodiesel Chlorella sp. have values from 0.84 g mL–1 to 0.848 g mL–1, and it is lower than the density of petroleum (diesel), and viscosity value from 2.5 cSt to 3.91 cSt, cetane numbers 51.17 to 53.72 also heating value 44.04 mJ kg–1 and Flashpoint 131 °C. The characteristic result shows that the Chlorella sp. microalgae biodiesel is still in SNI standard (Indonesia National Standard) so that the Chlorella sp. can be used as a substitute diesel fuel.

scholarly journals Pengolahan Limbah Kulit Durian dan Baterai Bekas Menjadi Salah Satu Sumber Energi Listrik yang Ramah Lingkungan

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Muhammad Gifron ◽  
Nelmi Agustina ◽  
Doris Wela
Keyword(s):  
Alternative Energy ◽  
Organic Waste ◽  
Plastic Waste ◽  
The Other ◽  
Basic Material ◽  
The Sun ◽  
Environmental Friendly ◽  
Waste Rubber ◽  
The World ◽  
Parallel Circuit

Abstrak. Seiring dengan bertambahnya jumlah penduduk dunia, selalu diiringi oleh masalah limbah yang berasal dari sampah, baik sampah organik maupun non organik. Berbagai usaha untuk mengatasi masalah limbah tersebut secara berkesinambungan terus dilakukan , baik itu sampah-sampah anorganik seperti, berbahan plastik, karet dan lain-lain. Bisa dimanfaatkan kembali melalui daur ulang menjadi barang-barang kebutuhan harian. Sedangkan untuk sampah organik selain dimanfaatkan untuk pupuk, juga dapat digunakan sebagai bahan dasar pengisi baterai untuk menghasilkan energi alternatif yang ramah lingkungan. Terkhususnya untuk pemanfaatan limbah organik dalam pembuatan baterai telah dilakukan dengan beda potensial tertinggi yang dihasilkan adalah 1,67 volt. Dalam penelitian ini dilakukan modifikasi massa bahan pengisi baterai yang bersumber dari kulit durian yang yang diproses khususnya melalui pengeringan menggunakan oven serta dicampur dengan asam dan ada juga kulit durian yang dijemur selama 7 hari dengan massa kulit durian 3, 5, dan 10. Beda potensial baterai tertinggi yang didapatkan adalah 10 gram yaitu sebesar 1,67 volt. Selanjutnya baterai dengan massa 10 gram difabrikasi dalam jumlah tertentu yang digunakan untuk menyalakan LED. Baterai tersebut dirangkai baik secara seri maupun paralel untuk menghasilkan beda potensial yang bervariasi. Abstract. Along with the growing number of the world populations, there always followed by troubles waste derived from trash, organic waste, and non-organic waste. Many attempts to deal with an organic waste such as plastic waste, rubber, and etc, has been continued, so those waste can be recycled and reused for daily demand. On the other hand, organic waste can be used as fertilizer, and basic material for the battery that results an environmental friendly alternative energy. Especially to utilize the organic waste, the making of battery has been done that yields highest voltage, 1.67 volts. This research aims to modify the mass filler of the battery that obtained from durian skin which is processed by mixing it with acid and drying it using oven, there also other technique by drying the durian skin under the sun for about 7 days which varied masses of 3 gram, 5 gram, and 10 gram. The highest voltage that obtained is 1.67 volt using 10 gram durian skin. Further, the battery with 10 grams durian skin is then fabricated in a specified number to light up the LED. This battery placed either in serial or parallel circuit to obtain varied voltage.

scholarly journals Modern Trends in the Development of Renewable Energy: the Experience of the EU and Leading Countries of the World

2020 ◽  
pp. 117-133
Author(s):  
L.Hr. Melnyk ◽  
O.N. Derykolenko ◽  
Yu.O. Mazin ◽  
O.I. Matsenko ◽  
V.S. Piven
Keyword(s):  
Sustainable Development ◽  
Renewable Energy ◽  
Global Economy ◽  
Alternative Energy ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Alternative Energy Sources ◽  
The World ◽  
The Eu

Energy security and independence is one of the key points in sustainable development. In modern conditions of rapid growth and development of technologies, more and more attention is paid to finding practical solutions for environmentally friendly and inexpensive energy production. For a long time, scientists from various fields of scientific activity around the world have been engaged in the development and use of alternative energy sources. The share of renewable energy sources in the generation of electricity around the world is growing steadily, which indicates an increase in the use of energy obtained from alternative sources, such as, for example, wind and sun. These trends testify to the desire of consumers to abandon the use of fossil energy sources and nuclear power plants as much as possible in order to ensure further sister development. Under the current conditions of the COVID-19 pandemic, the demand for electricity worldwide has decreased, however, as the study shows, this pandemic has not affected the development of renewable energy. The article analyzes modern trends in the development of renewable energy, taking into account the experience of the EU countries and leading countries of the world in this area. As a result, it was concluded that in modern conditions, to achieve sustainable development, transformation processes are needed in such an important area as energy. Various processes in the global economy, which contributed to the intensive development of alternative energy sources, served as a powerful impetus for such changes. Many countries have made significant progress in the development of renewable energy.

scholarly journals Conversion of Biomass of Bagasse to Syngas Through Downdraft Gasification

2018 ◽  
Vol 7 (1) ◽  
pp. 28-33 ◽  
Author(s):  
Maryudi Maryudi ◽  
Agus Aktawan ◽  
Siti Salamah
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Energy Demand ◽  
Alternative Energy ◽  
Renewable Energy Sources ◽  
Energy Reserves ◽  
Gasification Process ◽  
Gas Fuel ◽  
Gasification Products ◽  
Gasification Technology

National energy demand has been fulfilled by non-renewable energy sources, such as natural gas, petroleum, coal and so on. However, non-renewable energy reserves deplete increasingly which can cause an energy crisis. Conversion of biomass into energy becomes one of the solutions to overcome it. Indonesia has an enormous biomass potential especially from sugarcane plantation. Sugarcane plantations produce waste of bagasse abundantly. Commonly bagasse is utilized as energy source by conventional combustion.  This research studies the utilization of bagasse as energy source by gasification technology to produce gas fuel. The gasification model used in this research is downdraft gasifier equipped with cyclone to separate gas with solid or liquid gasification products. The result has shown  that gasification of bagasse has produced flammable syngas. The increase of bagasse weight increases the amount of syngas of gasification process. Carbon monoxide is the greatest content of syngas, while a few amount of H2, CH4 are also detected. Bagasse through gasification process is very potential source of alternative energy, since it is derived from waste and a cheap material.

Alternative energy capital of the world? Fix, risk, and solar energy in Los Angeles’ urban periphery

2021 ◽  
pp. 251484862110543
Author(s):  
Sean F Kennedy ◽  
Ryan Stock
Keyword(s):  
Renewable Energy ◽  
Los Angeles ◽  
Solar Energy ◽  
Alternative Energy ◽  
Financial Risk ◽  
Risk Mitigation ◽  
The United States ◽  
Policy Framework ◽  
Energy Infrastructure ◽  
The World

California is one of the most climate-challenged regions of North America and is considered the vanguard of climate action in the United States. California's climate policy framework has strongly promoted the expansion of renewable energy infrastructure, and the state generates more solar energy than any other in the nation. Using the case of Lancaster, a city of 170,000 residents in northern Los Angeles County seeking to position itself as the “alternative energy capital of the world,” this article examines private investments in solar energy infrastructure as a response to California's entwined economic and ecological crises. Drawing on recent scholarship on socioecological fix, we argue that private accumulation through renewable energy infrastructures in California has required both the presence of crisis conditions and innovations in financial risk mitigation that manage tensions between mobility and fixity inherent in the formation of fixed capital. However, a narrow focus on short-term financial risk obviates other forms of risk, including future impacts of extreme weather on grid infrastructure and electricity supply. While this does not foreclose opportunities for solar energy infrastructure to support positive social and ecological transformation, we argue that such opportunities may be constrained under a mode of energy transition predicated on private accumulation.

Improved Biogas Production from Corn Stalks, Pig Manure and Eggshell

2021 ◽  
pp. 39-47
Author(s):  
U. A. Adekola ◽  
I. Eiroboyi ◽  
Y. Yerima ◽  
T. E. B. Akinmoji ◽  
L. O. Uti
Keyword(s):  
Energy Source ◽  
Renewable Energy Source ◽  
Renewable Energy ◽  
Room Temperature ◽  
Fossil Fuel ◽  
Biogas Production ◽  
Pig Manure ◽  
Corn Stalk ◽  
The World ◽  
Main Substrate

The need for an environmentally friendly energy source in the world has led to major diversification in renewable energy. Biogas provides a renewable energy source that will replace fossil fuel inevitably. The experiment was carried out using a self-designed laboratory-scale anaerobic biogas digester. The study was carried out at room temperature from 25 - 31°C for 20 days using corn stalk as the main substrate while Pig manure and eggshell were used as co-substrates. The findings showed that the biogas produced from the sample containing a blend of corn stalk, Pig manure, and eggshell resulted in higher biogas volume than the sample containing corn stalk and eggshell, corn stalk, and pig manure as well as the sample containing only corn stalk. This implies that the use of the corn stalk blend is a source of renewable energy. Thus, ensuring the sustainability of biogas production in the future.

scholarly journals Rice husk as an alternative energy for cement production and its effect on the chemical properties of cement

2018 ◽  
Vol 195 ◽  
pp. 01009
Author(s):  
Agus Maryoto ◽  
Gathot Heri Sudibyo
Keyword(s):  
Energy Source ◽  
Rice Husk ◽  
Alternative Energy ◽  
Combustion Process ◽  
Chemical Properties ◽  
National Standard ◽  
Insoluble Residue ◽  
Cement Production ◽  
Chemical Content ◽  
The Impact

Production of rice husk in Central Java province is around 2,825,000 tonnes annually. It can be used as an alternative energy source to substitute coal in combustion during cement production. This study was conducted to determine the impact of rice husk as a substitute energy source in cement production. The observations of rice husk comprised calorimetric tests, physical and chemical tests, and percentage rice husk substitution for coal as firing energy. The chemical properties of the cement tested include the chemical content, MgO and SO3 contents, loss on ignition, insoluble residue, and total alkali. The results show that the chemical content of cement which is produced using rice husk as a substitute for coal in the combustion process still meets the Indonesian National Standard.

Fuelwood: The “other” renewable energy source for Africa?

2009 ◽  
Vol 33 (11) ◽  
pp. 1605-1616 ◽  
Author(s):  
Greg Hiemstra-van der Horst ◽  
Alice J. Hovorka
Keyword(s):  
Energy Source ◽  
Renewable Energy Source ◽  
Renewable Energy ◽  
The Other

scholarly journals Prerequisites for the resumption of the growth rate of hydrogen energy, a review of foreign experience and prospects for development in Russia

2021 ◽  
pp. 131-136
Author(s):  
A. S. Prozorov ◽  
E. O. Kalmykova
Keyword(s):  
Energy Source ◽  
Growth Rate ◽  
Renewable Energy ◽  
Retrospective Analysis ◽  
World Economy ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Hydrogen Energy ◽  
Foreign Experience ◽  
The World

At the beginning of the XXI century environmental problems began to have an integrated impact on various regions of our planet. The agenda of major international forums addresses issues related to their solution with the active use of renewable energy sources, including the expansion of the use of hydrogen in various sectors of the world economy. The article provides a brief overview on the prerequisites for the resumption of interest in the use of hydrogen as an energy source, a review of foreign experience in terms of regulatory regulation and incentives, as well as a retrospective analysis of domestic experience in the use of hydrogen and the prospects for the development of hydrogen energy in modern Russian realities. 

scholarly journals ENERGY EFFICIENCY OF RENEWABLE ENERGY SOURCES: MODERNIZATION TOOLS FOR ENVIRONMENTAL SAFETY AND INNOVATIVE-INVESTMENT ACTIVITY

2021 ◽  
Author(s):  
Kateryna Kraus ◽  
Nataliia Kraus ◽  
Anna Pavluk
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Alternative Energy ◽  
Renewable Energy Sources ◽  
Economic Security ◽  
Energy Sources ◽  
Energy Investment ◽  
Investment Activity ◽  
Difficult Situation ◽  
The World

The article examines the preconditions for the aggravation of environmental danger for Ukraine and the world as a whole, in particular in the context of the intensifying economic crisis. The long-term plans of the International Energy Agency to achieve “zero” carbon emissions by 2050 have been assessed. It was found that in order to ensure the growth of the world economy by the middle of the XXI century, it is necessary to increase energy efficiency, in particular in terms of active use of renewable energy sources. Energy efficient measures to ensure energy security of the urban agglomeration are summarized. In order to develop alternative energy sources, investments are needed in the energy sector (the annual share of investments in renewable sources in 2020 was 38%, which is $258.9 billion). Enhancement of energy efficiency and introduction of renewable energy sources should take place in the context of modernization of energy infrastructure of urban agglomerations: financing of technical re-equipment of energy assets, development of energy networks, reduction of energy intensity of industrial products, introduction of energy audit, etc. Ukraine has been ranked 8th in the world as one of the most attractive markets for renewable energy investment, but long-standing debt and incomplete energy market reform do not fully realize the potential (this is adversely affected by political mistakes, populist decisions, corruption and poor quality of energy management in Ukraine). It is proved that in the way of ecological safety creates barriers and a difficult situation with environmental protection, which significantly reduces the quality and comfort of life. It is proposed to create a strong environmental infrastructure in order to increase environmental security in the context of ensuring economic security; to introduce innovative ecological technologies; rationalize the processing of solid waste; to build modern waste processing plants, etc. Environmental legislation and governance in the field of energy policy is, unfortunately, a problematic area of current global change initiated by the EU to promote the use of environmentally friendly energy among EU member states.

Sign in / Sign up

Export Citation Format

Share Document