In the context of which one of the following are the terms ‘pyrolysis and plasma gasification’ mentioned?
✓ Correct answer: d) Waste-to-energy technologies
ExplanationWaste-to-Energy (WTE) technologies consist of any waste treatment process that creates energy in the form of electricity or heat from several types of waste: from the semi-sol- id (e.g. thickened sludge from effluent treatment plants) to liq- uid (e.g. domestic sewage) waste.Landfill gas recovery, Gasifi- cation, Pyrolisis, Thermal Depolymerisation are examples of Waste-to-Energy (WTE) technologies.Option (d) is correct: Pyrolysis is a process of chemical de- composition of organic matter brought about by heat.In this process, the organic material is heated in the absence of air until the molecules thermally break down to become a gas compris- ing smaller molecules (known collectively as syngas).Gasifi- cation can also take place as a result of partial combustion of organic matter in the presence of a restricted quantity of oxygen or air.The gas, so produced, is known as producer gas.The gases produced by pyrolysis mainly comprise carbon monoxide (25%), hydrogen and hydrocarbons (15%), and carbon dioxide and nitrogen (60%).It is used commercially as a waste to energy system th
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