Methods of Waste Disposal 2

On July 2, 2010, in Waste Disposal, by Jitendra

In addition to the Integrated waste management Plasma gasification and Landfill, there are other methods of waste disposal such as Supercritical water decomposition and Incineration.

Supercritical water decomposition – It refers to the process of hydrothermal monophasic oxidation where in the organic fraction of waste gets decomposed by high temperature and pressure. It is a sophisticated procedure that is used in the decomposition of Waste Plastics in Super critical Water. It utilises the property of water as a reaction solvent in its super critical condition.

Methods of Waste DisposalIncineration- Incineration is a disposal method that refers to the combustion of waste material. It uses the thermal treatment where in Incineration and other high temperature waste treatment systems are applied. With this method, the waste gets converted into heat, steam, gas, and ash. Incineration is performed on a large scale by industry and on a small scale by individuals. It can be applied for the disposal of solid, liquid and gaseous waste products. It is regarded as a practical method for the disposal of few harmful waste materials like biological medical waste. One major drawback of Incineration is the emission of gaseous pollutants.

Incineration is commonly used method of waste disposal specially in countries like Japan that have scarcity of land and these facilities do not need big areas like landfills. The common term that are used for burning waste in a furnace or boiler for producing heat, steam or electricity, are Waste-to-energy (WtE) or energy-from-waste (EfW). The combustion in an incinerator leads to the release of micro-pollutants in gaseous emissions via incinerator stacks. There are few persistent organics like dioxins, furans that are created within the incinerator and leads to serious environmental hazards in the region around the incinerator. Comparing it to the benign anaerobic digestion, we can make out that latter is better as it produces heat which can be used as energy.

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