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2023, International journal of science & technoledge
Biogas: An Alternative Source of Energy for Developing Economy 1. Introduction One of the major challenges in the world today is the depletion of reserved fossil fuels, which is a cause of the increase in energy prices (Schnürer, 2016). There is an increase in energy demand due to the increased population, leading to high waste generation, deforestation and global warming (Biodun et al., 2021). Energy is a very important factor in any nation (Forgács, 2012). In a developing country like Nigeria, there is a corresponding increase in energy consumption demand (Aluko, 2018). A nation like Nigeria has an installed capacity of 12,522MW at the moment. However, it is operating at a capacity of 3,879MW while the estimated energy need is placed between 98,000MW and 160,000MW, leaving behind a huge generation gap (Sambo et al., 2012). As part of efforts to bridge the energy gap, the country has been investing in constructing various dams and even solar energy projects and exploiting other resources and potentials such as natural gas, coal, and nuclear power. However, these are not currently being utilized due to a lack of proper technologies and/or political will (Aluko, 2018). It has been suggested that Nigeria's energy demands can be met sustainably via the use of renewable energy, such as biogas (Adewuyi, 2020). Anika et al. (2019) reported that the use of renewable energy is highly advantageous because the sources of energy are readily available, cheap and do not require elaborate technology and importantly, the fuel generated is environmentally friendly. Renewable resources for energy production are becoming more important because the burning of fossil fuels leads to the release of CO2, a gas that is implicated in global warming (Samantha, 2020). The problem of global warming can be partly circumvented by the production of biogas from plants or waste materials in a biological process (Busic et al., 2018). Biogas is a flammable, smokeless, hygienic, colorless, odorless gas, but with odour when not desulfurized. It has an energy content of 37.3 MJ/m 3 , explosion limits of 6-12% in air, ignition temperature of 650-750°C, specific gravity of 0.847-1.004, and calorific value of 4740-7500 kcal/Nm 3 (Ali et al., 2013). Biogas is an environmentally-friendly, renewable, clean, cheap, high-quality, and versatile fuel that is generated in digesters filled with feedstock. It is considered an alternative green energy resource and can be utilized for different energy services like heat, combined heat and power, or as car fuel (Ngan et al., 2020).
Biogas refers to a gas produced by the biological breakdown of organic matter in the absence of oxygen. Biogas can be used as a fuel in any country for any heating purpose such as cooking. By means of digesters, the energy in the gas can be converted to electricity and heat. Biogas like natural gas can also be used to power motor vehicle. Biogas is a renewable fuel which qualifies it for a renewable energy subsidy. It is non-toxic, environment-friendly and serve as a means of combating global warming. Biogas is presently being used in U.S.A, U.K, China, Sweden, Brazil, and India amongst others for domestic purpose, transportation and power generation. In this regard, this paper discusses biogas production. It also presents a model design of domestic biogas plant suitable for Nigerian households. The paper recommends that Nigerian Government should intensify efforts in educating the masses on this novel technology for a sustainable global development. A biogas plant designed for Nigerian household discussed in this paper is also recommended.
Energy security, socioeconomic growth and environmental protection are the national energy policy drivers of any country of the world today. The World Energy Forum has predicted that fossil-based oil, coal, and gas reserves is on the decline due to increase in energy demand. Despite advancements in modern technology, a larger population living in the rural areas in sub-Saharan countries use biomass in their traditional means for domestic cooking, heating and lighting. However, this rises severe environmental and health issues. An alternative source of renewable energy with abundant availability of biomass in sub-Saharan Africa will be biogas. Biogas is a sustainable and affordable renewable energy fuel and is environmentally safe in reducing greenhouse gases (GHGs) during combustion. However, there exist many challenges in biogas production and utilization, which includes high operation costs, high energy consuming processes, lack of sufficient government policy, and public-private partnership support. In addition, a concerted effort from all stakeholders are essential to facilitate the installation of small and medium biodigesters to harness the inherent potential that is currently not utilised. This review highlights the relevance of biogas technology in tune with the Sustainable Development Goals (SDGs) laid by the United Nations to make biogas a futuristic bioenergy for the well-being and prosperity of people living in sub-Saharan countries.
Energy security, socioeconomic growth and environmental protection are the national energy policy drivers of any country of the world today. The World Energy Forum has predicted that fossil-based oil, coal, and gas reserves is on the decline due to increase in energy demand. Despite advancements in modern technology, a larger population living in the rural areas in sub-Saharan countries use biomass in their traditional means for domestic cooking, heating and lighting. However, this rises severe environmental and health issues. An alternative source of renewable energy with abundant availability of biomass in sub-Saharan Africa will be biogas. Biogas is a sustainable and affordable renewable energy fuel and is environmentally safe in reducing greenhouse gases (GHGs) during combustion. However, there exist many challenges in biogas production and utilization which includes high operation costs, high energy consuming processes, lack of sufficient government policy, and public-private partnership support. In addition, a concerted effort from all stakeholders are essential to facilitate the installation of small and medium biodigesters to harness the inherent potential that is currently not utilised. This review highlights the relevance of biogas technology in tune with the Sustainable Development Goals (SDGs) laid by the United Nations to make biogas a futuristic bioenergy for the well-being and prosperity of people living in sub-Saharan countries.
The objective of this paper is to analyse the production processes of biogas as an alternative energy source. Biogas is generated from biomass by digestion under anaerobic conditions in the presence of microorganisms in three stages involved in the combined anaerobic digestion process. The biogas produced in anaerobic digestors could contain methane concentrations upto 80% by volume. This system can be integrated with the agricultural waste to produce biogas and small play an important role in improving residential sanitation and economical development in rural areas.
International Journal of Current Microbiology and Applied Sciences
Journal of Energy
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 ...
International Journal of Ecosystems and Ecology Science (IJEES), 2020
The purpose of this study is to measurably assess an integrated industrial biogas plant and introduce some biogas technologies as alternative sources for energy production in the Kingdom of Saudi Arabia. Biodegradable materials such as organic wastes, sewage, municipal wastes, and green wastes are very important precursors used in energy production plants for obtaining biogas and some certain organic fertilizers. Biogas plants have many benefits; one of their primary functions is being used as anaerobic digesters with different configurations to treat animal and agricultural wastes for energy production. During the process, microorganisms convert biomass wastes into biogas, mainly methane and carbon dioxide. The study shows four steps carried out of a full-scale biogas plant for a life cycle analysis (LCA) with 950 kWh as: initially, the scope and target were defined, then inventory was analysed, the impact was assessed, and finally the results were interpreted in detail. The results of analysis showed that the biogas plant can preclude the equivalent of 2.43E+09 kg of CO2 global warming and the ozone depletion of 18.80593 kg of CFC-11 equivalent. It was also determined that aquatic environment eutrophication contributed to the prevention of toxicity, acidification, and eco-toxicity for humans. Some organic by-products were obtained from anaerobic digestion (AD) and used as fertilizer for agricultural or other productions.
International Journal for Research in Applied Science and Engineering Technology
A promising sustainable method for generating energy from municipal, industrial, and animal wastes is biogas. The development of biogas can be combined with plans to enhance sanitation, lessen indoor air pollution, and cut greenhouse gas emissions. In addition to providing a techno-economic feasibility analysis of biogas plants, this research intends to identify technical and non-technological constraints preventing the widespread use of biogas in India. Different waste, renewable energy, and urban regulations have an impact on the distribution of biogas. Therefore, specific obstacles to India's current rural and urban biogas systems were identified. The findings demonstrate that there are significant differences in the nature and significance of obstacles amongst biogas systems due to variations in technological maturity, feedstock quality and availability, supply chain, awareness level, and policy support. The developed excel model also provides a full perspective of the economic factors used to assess the viability of a biogas plant project. Users may assess numerous situations and decide on the best course of action for their investment in the biogas sector by using a comparison and analysis technique. I. INTRODUCTION Biogas may play a role in the shift to a more environmentally friendly energy system. Modern waste management systems may benefit from the use of biogas, a sustainable energy source. Producing biogas can also aid in returning nutrients to crops. In addition to all of this, biogas is a locally generated energy source that has the potential to boost the efficiency of the use of global resources since it may result in increased value and decreased waste, as well as reduced adverse environmental consequences. Nevertheless, biogas production systems are complicated due to the variety of substrates, uses for digestate and biogas, and technological approaches for digestion, pre-treatment, and upgrading raw gas. There is a growing amount of energy demand in India from many industries. Biomass, which is one of the main energy sources in rural India and makes up around 75% of total energy consumption, is currently the new prospect in national programmes for a competitive energy source [1,2]. Due to its ecological sustainability and great efficiency, bioenergy, a major renewable energy source, is crucial in lowering carbon emissions [3]. Bioenergy differs from other renewable energy sources in several ways. As long as the utilization rate is lower than the growth rate, there are significant amounts of biomass feedstock that are available and stored on Earth. As a result, biomass may end up being the only organic resource that is renewable for making energy [4]. The carbon dioxide emissions from using bioproducts can also be countered by the carbon dioxide fixation and absorption from the regeneration of biomass resources since biomass is a biological substance obtained from living or recently lived organisms. Therefore, biomass utilization can realize carbon neutrality goals [5]. In addition, bioenergy can be converted into various types of energy carriers, such as biodiesel, biogas, and bioethanol, which could facilitate easier storage and utilization of such energy [6,7]. Thereby, biomass utilization follows the "waste-to-energy" model and is beneficial for establishing a sound material-cycle society. Individual homes often operate small-scale plants to produce energy for self-use. On the other hand, large-scale biogas facilities that can produce more than 5000 m3 of biogas per day mostly use municipal sewage organic wastes to produce biogas, which may then be used to generate electricity, heat homes and businesses, and power vehicles. Large-scale commercial biogas plants are managed by entirely private or public-private partnerships to yield financial benefits through the sale of end products such as electricity, transport fuel, or heat. Family-type biogas plants are managed by individual households and require financial investment while only yielding non-monetary benefits, such as biogas used as a cooking fuel instead of gathered fuelwood. Uncontrolled urbanization and the rapid pace of population expansion have seriously complicated the challenge of disposing of solid garbage. Food waste makes up a significant component of municipal solid wastes (MSWs), which are frequently dumped in landfills or other places and cause environmental issues, according to a study conducted by Baawain et al. [20]. However, because landfilling produces leachate, methane, and carbon dioxide as well as other annoyances like insects, odor, and vermin like birds and rats, it is expensive, takes up a lot of areas, and may have a severe influence on the environment if improperly managed.
American Journal of Innovation in Science and Engineering
In Nigeria today, there is a lot of waste that is being generated on a daily basis. From Domestic wastes to kitchen wastes, poultry and livestock not excluded. Due to the current energy crisis and climate change, the country could benefit greatly from an alternative energy source which is eco-friendly, renewable, sustainable and efficient. This alternative energy source is called ‘’Biogas”. Biogas is formed by anaerobic digestion of organic materials. Biogas can be produced from kitchen wastes, cow dungs, poultry, pig faeces, etc. These wastes from the Bio-digester can later be treated as a by-product to give a nutrient rich organic fertilizer that can be used in farmlands and gardens. This paper outlines the benefits of organic waste and its potentials for domestic as well as industrial use when compared to other conventional fuels. The selected organic wastes that were thoroughly analyzed in this research work are; Human excreta, Pig excreta, sheep and goat excreta, abattoir waste...
2013
The world's growing energy consumption and limited fossil energy resources and the environmental impact of these materials on the one hand, the increase Tend to use renewable energy sources such as bio-gas energy in the world. Biogas by bacteria that cause decay, rot and break down organic materials in anaerobic conditions can be produced. Best places for optimal utilization of biogas in rural areas can be cited. Biogas contains about 70 percent methane gas extracted from the device and 30 percent carbon dioxide and contain small amounts of hydrogen sulfide and water vapor. In addition to fuel rural biogas recovery, biogas system with a by product of the fertilizer is rich. Compared with normal manure fermented manure ammonia and phosphorus by 120 percent to 150 percent increased efficacious resistant parasite Ascaris worms or intestinal worms that after 180 days of staying alive, staying instrument biogas power is reduced to 20%. Chinese model biogas system has the best conditi...
This chapter demonstrates a biogas renewable energy resource potential study for electric power generation from easily available biogas feedstock materials in four selected case study sites. Under this study, the site used in the model is a rural Kebele in Jama Woreda at 10.548°N, 39.33°E. The common biogas feedstocks considered under this study are animal slurry, human feces and jatropha byproducts whereas the biodiesel is considered from jatropha seed.
ADVANTAGES AND LIMITATIONS OF BIOGAS TECHNOLOGIES, 2019
Biogas systems turn the cost of waste management into a revenue opportunity for farms, dairies, and industries. Converting waste into electricity, heat, or vehicle fuel provides a renewable source of energy that can reduce dependence on foreign oil imports, reduce greenhouse gas emissions, improve environmental quality, and increase local jobs. Biogas systems also provide an opportunity to recycle nutrients in the food supply, reducing the need for both petrochemical and mined fertilizers. The present paper gives a complete idea on the prospective technology for the production of clean energy in the form of biogas. Biogas is green and a sustainable energy consisting of methane to a great extent along with other gases. Global warming and greenhouse effect are caused due to the harmful gases which are released into the atmosphere. Emission from automobiles and industries are one of the causes of global warming. Along with global warming the excessive use of fossil fuels shifts the balance of supply of fuels. So in order to save fossil fuels for our future generations alternative fuels play an important role in replacing the fossil fuels. The present paper gives an idea of the history of biogas and their advantages and disadvantages.
Journal of Applied and Advanced Research
Challenges related to energy shortages are increasingly frequent both at the local and global scale due to population growth and the desire for a greater standard of living. The growing demand for oil and natural gas caused by high consumption levels is one of the current major problems faced by the world population. Therefore, new forms of energy generation must be investigated that would eventually allow the diversification of the present energy matrix, which has an almost 90% dependence on fossil fuels the world over. This coupled with long-term economic and environmental concerns have resulted in a great amount of research in the past decades on renewable sources of liquid fuels to replace fossil fuels. Burning fossil fuels such as coal and oil releases carbon dioxide (CO2), which is a major cause of global warming. It is anticipated that not a single source of alternative energy but a mix of various energy sources and carriers will contribute to the energy system of the future....
Energy is an indispensable part of modern society and can serve as one of the most important indicators of socio-economic development. Despite advancements in technology, however, some three billion people, primarily in the rural areas of developing countries, continue to meet their energy needs for cooking through traditional means by burning biomass resources (i.e., firewood, crop residues and animal dung) in crude traditional stoves. Such practices are known to be the source of significant environmental, social, economic and public health issues. To achieve sustainable development in these regions, it is imperative that access to clean and affordable (renewable) energy is made available. Within this context, upgrading existing biomass resources (i.e., animal manure, crop residues, kitchen waste and green wastes) to cleaner and more efficient energy carriers (such as biogas from anaerobic digestion) has unique potential to provide clean and reliable energy, while simultaneously preserving the local and global environment. In spite of its significant potential to serve developing nations, however, the high costs and lack of expertise in installation and maintenance of biogas technology preclude widespread adoption in geographically isolated communities. Concerted efforts from both governmental and nongovernmental sectors are absolutely essential in facilitating modernization and dissemination of biogas technology to harness the inherent potential that is currently underutilized and unexploited. The intent of this paper seeks to highlight the present status, challenges, and potential of biogas technology to advocate for further research, development and dissemination of the concept in developing countries.
Choice Reviews Online
is written as a practical introduction to biogas plant design and operation. The author covers both the biological and technical aspects of biogas generation, illustrated by numerous examples from real-life plants. The book includes detailed of all the process steps to be followed during the production of biogas, from the preparation of the suitable substrate to the use of biogas, the end product. Biological, chemical and engineering processes are detailed in the same way as apparatus, automatic control, and energy or safety engineering. The first part of the book, General thoughts about energy supply has an introductory role and includes five chapters. Chapter 1, Energy supply-today and in the future, describes primary energy sources: fossil energy sources, renewable energy sources and nuclear fuels , and secondary energy sources can be converted until the end-point energy. This chapter describes a case study from Germany. The total consumption of primary energy in Germania is ca. 4100 TWha-1 , which has been provided by the use of different primary energy sources. This is explained by the current trend toward a society with a high number of cars per family leading to a high demanded of petrol, a secondary energy source of petroleum. Chapter 2, Energy supply in the futurescenarios presents the scenarios for different energy sources for the years 1990 up to 2100 and stipulate that by 2020 the technologies around renewable resources are expected to have reached the potential for full economic use.
Energy & Environment, 1996
The problem of energy crisis continues to reverberate in many of the developing countries. In Nigeria, the majority of families living in villages and small towns depend on wood as their domestic fuel. This is because other conventional fuels such as kerosene, electricity and LPG are costly, unreliable or unavailable. Because of the serious environmental effects fuelwood harvesting poses, other cheaper, environment-friendly renewable energy sources such as biogas should be sought. This short review paper explores the potentials for and feasibility of biogas production in Nigeria where the technology is not yet adopted, and recommends how to make it viable in the country.
2013
In present time, the global energy production is mostly dependant on the fossil sources of energy (oil, natural gases and coals). Compared to classic fuels, biogas resulted from anaerobe digestion is permanently renewable, because it is obtained  of biomass. As a result, the biogas produced through anaerobe digestion will not only improve the energetic balance of one country, but it will bring an important contribution on preserving natural resources and improving the environmental conditions, through reducing emissions with green house effect and reducing the global warming. The paper wants to reveal some of the advantages of using biogas, the most important being that biogas is a flexible source of energy, suitable for many applications, especially as fuel for vehicles or in the electric piles technologies. In order to be used as fuel for vehicle, biogas must be improved and transformed in bio-methane. The paper also presents a small biogas plant, which can be used by farme...
Biogas is the gaseous product of the biogenic fermentation of biomass. It has an approximate composition of 50-70% Methane (a combustible gas), 30-50% Carbon dioxide and other trace gasses depending on the nature of the biomass. It typically has a calorific value of 21-24 MJ/m 3. Anaerobic digestion of biomass can artificially be achieved under controlled conditions in specifically designed plants known as anaerobic digesters or naturally at the bottom of marshes. Biogas, a versatile energy source can be used for heating, cooking, lighting, electricity and if purified further, it can be used as a vehicle fuel among other applications. The digestate is a widely sought after organic agricultural fertilizer. The first notable use of biogas technology dates back as far as 1859, there has been several advancements over the years in its application as well as production which are presented in this paper.
American International Journal of Contemporary Scientific Research, 2014
The production and application of biogas is documented. Biogas is a product of anaerobic fermentation of organic wastes and consists of methane, carbon dioxide, hydrogen sulphide, and other gases. Biogas can be used for lighting, source of heat for cooking and warming the house. Stationary engines, cars and trucks hitherto running on diesel and petrol can be converted to run successfully on biogas either wholly or in combination with diesel and petrol respectively. The digested sludge and slurry from biogas digester are also useful as manure, for algae production, and as feed material for fish, pig etc. Biogas can also be used as a veritable means of controlling pollution as well as for conservation and developments purposes. Governments are advised to create awareness on the production and utilization of biogas to fully utilize the benefit derivable from that aspect of renewable energy technologies (RET).
The associated harmful environmental, health and social effects with the use of traditional biomass and fossil fuel has enhanced the growing interest in the search for alternate cleaner source of energy globally. Ghana, a developing country depends heavy on woodfuel as a source of fuel contributing about 72% of the primary energy supply with crude oil and hydro making up the rest. Biogas generation has simply been seen as a by-product of anaerobic digestion of organic waste. Having proven to be a practicable and promising technology, it has been very successful and a very reliable and clean source of energy when proper management programmes are followed. There are vast biomass resources including organic waste in Ghana that have the potential for use as feedstock for biogas production to reduce the over reliance of woodfuel and fossil fuel, and to help reduce the it would reduce greenhouse gas emissions which may be affecting climate change. Ghana having the technical potential of constructing about 278,000 biogas plants, only a little over 100 biogas plants has so far been established. This paper presents the energy situation and the status of the biogas technology and utilization in Ghana. It also presents the potential benefits, prospects and challenges of the biogas technology. 5 Mesophilic temperature range. 6 Calorific value of biogas: 6 kWh/m 3 [17] and this corresponds to about half a litre of diesel oil [12]. R. Arthur et al. / Renewable Energy xxx (2010) 1e7 4
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