Energy from Waste

Energy from Waste

Energy from Waste

Waste Energy recovery is the extraction of energy from waste. Solid wastes are combusted to give heat which is then used for electrical power generation. Other wastes, such as landfill matter, are digested anaerobically to give fuels such as methane, methanol, and ethanol. Also energy can be extracted from waste through other processes such as pyrolysis, gasification, and landfill gas recovery. Energy from waste can be applied in electrical generation and provision of heat energy for various purposes. This is a paper waste energy recovery and commercial application.

Waste energy recovery and repurposing can be referred as first fuel because of the benefits it holds over conventional fossil fuels. The main benefit derived from waste energy recovery is environmental conservation. Combustion of fossil fuels leads to emission of carbonaceous and toxic gases which pollute the environment and cause global warming through the greenhouse effect. By replacing fossil fuels with cleaner energy from waste, the environment is shielded from tons of greenhouse gases which would have otherwise have been released. Also, the use of energy from waste ensures reduces other carbon emitting power generation activities.

Economic wise, waste energy recovery offers a viable energy solution than conventional energy sources. Grid power supply is often affected by frequent outages which disrupts production activities. Also, petroleum fuel derivatives are often affected by vagaries in world oil prices which make it hard to project fuel costs against production. When a company owns the means of power generation, it can plan for a generation schedule against expected demand thereby reducing wastage. In addition power produced from waste is cheaper than energy purchased from a utility company or from diesel thermal generators which make it more appealing from an economic perspective. Finally, the use waste to generate waste considerably reduces its mass, eg to ashes, and disposal costs are dramatically reduced.

Waste energy repurposing is can be in the form electrical power generation. In this process, unrecyclable waste energy, normally from municipal council garbage collection centers, is incinerated to produce heat energy. The heat is the used to generate high steam vapor with enough kinetic energy to drive steam turbines which are attached to electrical generator shafts. The torque from the turbines rotates generator armatures causing power generation through electromagnetic induction. The power generated can then be fed to the grid or applied directly for company based waste power plants.

Landfill gas recovery is technology that that harnesses methane gas produced from landfill sites. Methane is a combustible gas that can be used as a fuel for heat energy generation. Heat generated can be applied for industrial processes such as process steam generation and central heating. The gas can also be combusted in internal combustion engines coupled to generators for electrical power generation. Landfill methane is a potent energy source given the large landfill sites managed by municipal councils in different towns.

Waste energy recovery is a trend that is quickly picking traction. Apart from reducing carbon emissions, energy from waste recovery technology solves the problem of waste disposal. Companies, businesses, and other entities that practice waste from energy recovery reap the benefits of having control over the power that they consume. Grid power is expensive, suffers outages and is of low quality. Waste from energy recovery turns consumers into independent power producers


Rao, K. R. (2011). Energy and power generation handbook: Established and emerging      technologies. New York: ASME Press.

Reay, D., Smith, P., & Amstel, A. . (2010). Methane and climate change. London: Earthscan.

Shepherd, W., & Shepherd, D. W. (2014). Energy studies.


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