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Waste management in the Philippines brief intro
Waste management in the Philippines brief intro
Biogas literature review
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1. Introduction
Developing countries are characterized by rapid industrialization and a high population growth. As a result, the amount of generated organic wastes has increased. With the predominant methods of waste disposal, incineration and landfilling, there are problems associated. Incinerators produce flue gases containing bioaerosols, which cause environmental pollution. Though the use of landfills has been termed as efficient and to some extent environmentally friendly, most developing countries lack sufficient landfill capacities to handle the generated waste effectively. For example, according to the research conducted by Gautam, Baral and Herat (2009), when Gorkana, the largest landfill in Nepal got filled up, the waste management authorities started dumping wastes along the banks of River Bagmati. Conversion of organic wastes to biogas through anaerobic digestion offers the best solution to organic waste management (Zhang et al. 2014). Similar trend is seen in Malaysia where the landfills are almost reaching their life span due to improper management (Jereme 2013). This technology does not only provide disposal solution but also acts as an alternative to the existing sources of energy thus boosting the overall available energy for economic activities (Zhang et al. 2014).
The project investigates the health, environmental, cultural and economic impacts of anaerobic digestion in developing countries. The paper presents an overview of biogas production, biogas composition, biogas applications and finally the health, environmental, cultural, and economic impacts of biogas in developing countries.
2. Background information
Biogas is a mixture of carbon dioxide (CO2) and Methane gas (CH4), which is produced of organic waste...
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...echnology does not only offer a solution to waste management but also acts as a substitute source of energy. Due to increased expenses on conventional biofuels, the need to reduce pollution and the ease of handling and disposing of organic wastes, biogas technology is widely employed nowadays.
Biogas technology has more positive impacts than negative ones in developing countries. It has reduced air pollution and improved hygienic conditions of developing countries. It has reduced environmental pollution by reducing the amount of carbon and its compounds in the atmosphere. Young girls have been empowered in society and education has been promoted. The technology has saved on costs by offering an alternative means of waste disposal and as a cheap source of energy. Finally, biogas technology has boosted agriculture by offering as an alternative to chemical fertilizers.
Biodiesel is considered an environmentally friendly alternative because it reduces the amount many toxic substances. Plants such as soybeans require carbon dioxide from the air to produce their stems, roots and leaves. During biodiesel production from soybean oil, carbon dioxide is produced and released in the atmosphere. Carbon dioxide is considered a green house gas (GHG). However, this cycle of GHG emission does not neccersarily contribute to the atmospheric carbon dioxide levels. This is because the next soybean crop will reuse the carbon dioxide emitted for its growth. Another important environmental benefit is that biodiesel reduces particulate matter (PM), hydrocarbon (HC) and carbon monoxide (CO) emissions. These benefits occur because biodiesel contains 11% oxygen by weight. Oxygen allows the fuel to burn better, resulting in fewer emissions from unburned fuel. And lastly, biodiesel fuels do not contain any sulfur and does not have an unpleasant smell when it is emitted from vehicles.
producer of methane gas is the world), as well as the huge amount of land used to
Methane is also another important greenhouse gas in the atmosphere is the resultant of human activities. It is infused in the atmosphere due to-
The largest source of methane emissions in the United States are landfills. Landfill gas, which is
Energy, especially from fossil fuels, is a key ingredient for all sectors of a modern economy and plays a fundamental role in improving the quality of life in less developed economies. In 2007, India is ranked fifth in the world in terms of energy demand; accounting for 3.6% of total energy consumed, and is expected to grow at 4.8% in the future. India imports 70% of the oil it uses, and the country has been hit hard by the increasing price of oil, uncertainty and environmental hazards that are concerned with the consumption of fossil fuels. In such context, bio energy constitutes a suitable alternative source of energy for India, as large amounts of raw material are available to be harnessed.
...ch is used to replace natural gas. He also stated that, among the equipment used to burn the biofuel, the suspension burner have the ability to exceed 99% efficiency and whole-tree burner can reduce the cost of harvesting and handling woody fuels by about 35% (Brown, 2003). Moreover, the usage of bio-energy in long term is to provide a degree of ecological balance and climate change, avoid acid rain, reduce soil erosion and minimize water pollution (Gevorkian, 2007). Therefore, biomass is environmental friendly like solar energy. Based on the research that has been carried out regarding the synthesis of gas from biomass, the gas gasifies in the internal combustion engine. The relative energy density of synthesis gas is higher than the fossil fuel under certain conditions. In addition, the relative flame speed of synthesis gas can reduce the time for spark ignition.
The landfills is also a major source of methane. But unlike the other sources it is hard to control the amount of waste produced by every house, restaurant.. etc. , for that , the strategy is to "utilize" that gas, Landfill gas utilization process is basically gathering, and treating the methane gas emitted from decomposing garbage to produce electricity, heat, fuels, and various chemical compounds . If the landfill gas extraction rate is large enough, a gas turbine or internal combustion engine can be used to produce electricity.
The emission of carbon dioxide has contributed to 80% to the heating of the earth atmosphere. Carbon dioxide is produced due the burning of fossil fuels such as natural gas, coal and oil. The burning of fossil fuel is very important in our society today, because it is used for cooking, used to produce electricity, for heating, for cooling and also for transportation. The industrialization has led to the use of fossil fuel for running machines and driving cars. The building of fossil fuel contributes towards 80-90% of the carbon dioxide we find in our atmosphere today. When the ecosystems are altered and vegetation is either burned or took out, the carbon stored in them is relinquished to the atmosphere as carbon dioxide (What causes global climate change, 2005). Methane is another gas being produced in the process which all have served to increase the greenhouse effect in our atmosphere. Methane is produced from the cultivation of rice, from the burning of coal and from cattle, it has increased by 145% due to human
The emergence and increased popularity of biohacking/DIYbio will work to increase the acceptance of such
Gasification products can be divided in fuel gases and non-fuel gases. The fuel gas (mixture of Carbon monoxide, Hydrogen and traces of Methane) is called producer gas. In particular, section 2.2 focuses on the non-fuel gases such as Carbon dioxide, Nitrogen, some hydrocarbons and water steam which cannot be utilized for combustion. Table 1 shows that according to the gasifier system and the gasifier agent, the biogas composition
Bioreactor is one of the most familiar words in bioprocessing engineering's books. Which mean a place which is designed to be suitable for the growth of specific types of bacteria, fungi or other microorganisms by provision of the necessary conditions for its growth [2]. These microorganisms are doing biochemical processes that produce useful materials for humanity, Such as some kinds of medicines, enzymes and fuel. In this case the fuel which made by microorganisms is called bio fuel [3]. Bio fuel often is environmentally friendly, and has many advantages such as it is cheap, it is a renewable power resource and it is product able easily. On the other side it has some negative point such as it need a lot of time to make few litter of bio fuel when we use the normal method to produce it. In this project some points of designing devices, methods and technology of bioreactors and using it to producing bio fuel will be discussed.
The concept of this essay is to stress that biofuels are a viable and sustainable energy source than fossil fuels, showing its advantages but not ignoring its disadvantages which also enlightens us about the cleaner and renewable natural resources. Biofuels is an alternative source of energy which can end the global dependence on fossil fuels.
Traditional methods of waste disposal have proven to be ineffective and have caused harmful effects on the environment. The most popular and inexpensive way to get rid of garbage is burial, but burying your problems does not necessarily mean getting rid of them. Landfill sites pose as severe ecological threats as these mass garbage dump yards overflow with trash and frequently contaminate our air, soil and water with hazardous wastes. About 400 million tons of hazardous wastes are generated each year1. A large-scale release of these materials can cause thousands of deaths and may poison the environment for many years. For example many industrial companies around the world cannot afford to enforce the strict pollution regulations set by many developed countries. This usually forces these types of companies to move to developing countries where pollution regulations are very lenient. These developing countries knowingly accept environmentally hazardous companies usually because they are in desperate need of employment. The harmful effects of these companies were clearly illustrated in the 1960s and 1970s when residents living near Minamata Bay, Japan, developed nervous disorders, tremors, and paralysis in a mysterious epidemic. The root was later found to be a local industry that had released mercury, a highly toxic element, into Minamata Bay. The disaster had claimed the lives of 400 people1. Since 1970 you can bet that a lot more than 400 people have died as a result of waste disposal. If the type of waste disposal were cheaper and effective we wouldn’t have to deal with waste problems, which still plague mankind today.
The United States produces “about 8.25 billion tons of solid wastes each year” (Russell 1). People do not realize the impact they have on our planet and environment. When people throw anything in the trashcan, they are contributing to the destruction of our planet. The number landfills in the United States are decreasing, but the amount and volume of waste being thrown into the new landfills is increasing (Russell 4). Because of this escalating amount of garbage, Methane which contributes to global warming is an outcome of these landfills (Russell 7). As a result, our planet is suffering because of this epidemic. The garbage being put in the landfills could be recycled, but not enough businesses, ...
Due to the fact that there is a huge problem with garbage disposal, government representatives must contribute to resolving this issue. Efficient waste management approaches help with reducing and avoiding unpleasant impacts on the environment and human health, while allowing for financial development and progress in the quality of people’s lives. People do not even imagine the size and capacity of their activities and the impact they produce on the environment. Garbage is an important ecological problem. It seems amazing that approximately all of the citizens of the world identify rubbish as a major environmental problem and yet these people still litter.