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Disscuss the advantages adn disadvantages of different methods of solid waste disposal

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Discuss the advantages and disadvantages of methods used to treat solid wastes Waste is something that has no value and as a result requires disposal. Sources can include mining, industry and domestic waste and if left untreated or poorly treated can cause pollution, being both hazardous and toxic. Under the 1990 environmental protection act, the underlying principle is that the polluter pays. Industries causing pollution must get a licence for disposal and must have a duty of care. If they cause excessive pollution then the industry in question must pay the costs to remove the pollutants and clean the area back to its former state. They will also have to pay a landfill tax however grants and subsides to develop anti-pollution equipment are in place. There are 4 main methods of solid waste disposal and these include landfill and land raising, incineration and pyrolysis, chemical treatment and encapsulation/vitrification. ...read more.


This could be limited by reducing the amount of organic matter in landfill (composting) but at the present time this is not the case. The main limitations of landfill are the outbreaks of fires due to gases building up, subsidence and the smell. Furthermore, the amount of lorries to and from the site causing large volumes of noise, congestion and the burning of fossil fuels and taking up space that could be used for agriculture. Conversely there are possible uses of a landfill after use such as recreational uses like golf courses and areas of wildlife refuge as these will not be heavily used and will not cause subsidence. Ultimately, landfill does provide a cheap way to dispose of large amounts of waste however sites are visually obtrusive and can cause pollution issues if not maintained and managed correctly. Incineration is a waste treatment technology that involves the combustion of organic materials and/or substances. ...read more.


Also incinerators emit varying levels of heavy metals such as mercury which can be toxic at very minute levels. Furthermore, the start up cost of incinerators is high, and requires long contract periods to recover initial investment costs, causing a long-term lock-in. Also, some of the flue gases are not fully filtered casuing dioxines and carbon dioxide to be released into the atmosphere. All types of waste treatment will have their strengths and weaknesses, however often local communities are opposed to the idea of locating waste disposal systems in their vicinity - "not in my back yard." But to be sustainable and to reduce pollution, ultimately we should aim to reduce waste, be it by improving waste loops, recycling schemes or awareness to the problems of waste. The waste hierarchy; prevention, waste minimisation, reuse and recycling should always come before treatment of waste in any of its guises. ...read more.

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