essay about Biogas from 1 to 200 words
Answers
Biogas refers to a mixture of different gasesproduced by the breakdown of organic matter in the absence of oxygen. Biogas can be produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green wasteor food waste. Biogas is a renewable energy source.
Biogas is produced by anaerobic digestion with methanogen or anaerobic organisms, which digest material inside a closed system, or fermentation of biodegradable materials.[1] This closed system is called an anaerobic digester, biodigester or a bioreactor.[2]
Biogas is primarily methane (CH
4) and carbon dioxide (CO
2) and may have small amounts of hydrogen sulfide (H
2S), moisture and siloxanes. The gases methane, hydrogen, and carbon monoxide(CO) can be combusted or oxidized with oxygen. This energy release allows biogas to be used as a fuel; it can be used for any heating purpose, such as cooking. It can also be used in a gas engine to convert the energy in the gas into electricity and heat.[3]
Biogas can be compressed, the same way as natural gas is compressed to CNG, and used to power motor vehicles. In the United Kingdom, for example, biogas is estimated to have the potential to replace around 17% of vehicle fuel.[4] It qualifies for renewable energy subsidies in some parts of the world. Biogas can be cleaned and upgraded to natural gas standards, when it becomes bio-methane. Biogas is considered to be a renewable resource because its production-and-use cycle is continuous, and it generates no net carbon dioxide. As the organic material grows, it is converted and used. It then regrows in a continually repeating cycle. From a carbon perspective, as much carbon dioxide is absorbed from the atmosphere in the growth of the primary bio-resource as is released, when the material is ultimately converted to energy.
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Importance of Biogas plant Essay
Essay Topic: Health care, Natural gas
The energy prospect is generally assessed on the basis of available
commercial sources of energy i.e., fossil fuel like gas, coal, oil etc. Worldwide, there is a major transition underway in the energy sector. Biogas can be a potential source of renewable energy, Residues from biogas also proven as a significant source of organic fertilizer. If there is proper policy and implementation, Bangladesh’s energy crisis and organic fertilizer demand can be control through biogas plant.
1. Introduction
By 2020, the world is throwing into turmoil as demand for energy begins to greatly exceed the supply – crippling many economies and triggering widespread social unrest.
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Importance of Biogas plant
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Many countries in the West may experience a decline in living standards – with oil rationing and conservation measures introduced by governments and substantial reductions in travel, tourism and aviation. The crisis plays out for nearly two decades, gradually being resolved by a switch to renewable energy and alternative fuel technologies. In Bangladesh context, neither the decision-makers nor the experts pay due importance on proper extraction and use of renewable energy. Here grater population is using natural gas and imported oil, with the present rate of consumption, natural energy resources like gas will be exhausted shortly and this is high time to derive policy and practice for exploration a
. Biogas
Biogas, a cheap secondary renewable energy, is a gaseous fuel obtained from biomass by the process of anaerobic digestion or fermentation. Biogas fermentation is the process by which organic materials such as human or animal excreta, domestic wastage, agricultural wastage etc, are degraded, by huge quantities of various microbes of different functions, under anaerobic conditions, to yield methane (about 55-70% content), carbon dioxide (about 3045% content) and low amount of other gases in the end. Biogas can be used as a vehicle fuel or for generating electricity. It can also be burned directly for cooking, heating, lighting, process heat and absorption refrigeration. Cattle dung, agricultural residue, poultry dropping, water hyacinth, human excreta may be used as raw materials for biogas plants. A typical biogas plant consists of a digester in which the slurry (dung mixed with water) is fermented; an inlet tank used to mix the feed and let it into the digester; a gas holder/ dome in which the generated gas is collected; an outlet tank to remove the spent slurry; distribution pipelines to take the gas into the kitchen.
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