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| Recover Waste recovery is a broad term used to describe the process by which energy stored in waste is extracted in the form of fuel, heat or power.  Waste is combusted under strictly controlled conditions, reducing the volume of waste material. In the modern waste management industry, the term 'incineration' is understood as the burning of waste without the recovery of energy. 'Energy from Waste’ encompasses a number of different processes where household rubbish that is not recycled, is burned to produce energy in the form of heat and electricity. The electricity produced as part of this process can then be sold to the National grid and the heat can be used in heating schemes. This process takes place in purpose built industrial plants, which are designed to meet strict environmental controls and are heavily regulated to reduce pollution. We currently send about 7% of Warwickshire's household waste to the Energy from Waste plant in Coventry, where it is used to produce heat and energy. Mechanical Biological Treatment MBT plants take bulk waste and remove recyclable or non-combustible materials, the remainder of the waste can then be processed. There are three types of MBT process:
The methane generated as a by-product of biodegradation in a landfill site must be controlled in order to minimise its effect on the environment. Collecting it and using it as a fuel has two benefits - avoiding pollution and generating energy. However, the energy recovery from landfill is considerably less efficient per tonne of waste than Energy from Waste. Anaerobic Digestion Biodegradable material is processed in an enclosed vessel under controlled conditions. The material breaks down in the absence of air and produces a gas, liquid fraction and compost-like material. The gas produced can be used to generate electricity, which can then be sold to the national grid. |
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