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| Incineration and Other Waste to Energy (WtoE) Technology Developments by Steve Evans Incineration is a waste treatment technology that involves the combustion of organic materials and/or substances. Using incinerators, medical wastes are converted into ash, flue gases, particulates and heat, which can in turn be used to generate electricity. Incineration is a proven means for the destruction of many organic wastes. Information relating to the design, operation, and performance of incineration systems is presented. Incineration is the burning of waste with or without energy recovery. Britain's Royal Commission on Environment findings in 1993 maintained that incineration is an efficient way of recovering the energy present in household wastes, in order to generate electricity or provide steam or hot water. Incineration is one of the best methods of reducing the volume and hazard of organic hazardous wastes. Through incineration, more than 90 percent of the volume of the original waste is typically reduced. Waste incineration is probably one of the most effective ways of getting rid of factory and industrial products. The problems of trying to expel wastage are that there is not enough space on the earths ground to keep them. Waste is a complex combination of substances, and burning them at high temperatures results in the production of a number of substances, which are then released from smokestacks to the surrounding air. The emissions of acid gases, including SOx and NOx, together with heavy metals, dioxins, and mercury, are some of the sources of concern. Waste to energy has so improved its emissions. In the US, the EPA now considers the industry one of the cleanest producers of electricity, and in Europe and other countries which follow the EU example, the Waste Incineration Directive (WID) ensures that only the most stringently controlled and extremely low incinerator and WtoE Plant designs will ever be allowed to operate. Waste to energy projects are designed in one of two main ways. The first is incineration, in which organic material is burned to operate a generator, producing electricity. Waste to energy technology includes combustion, gasification, pyrolysis, anaerobic digestion, fermentation, and esterification. Some of these technologies are very cost effective, while others may not be as much so. Incineration is not just conducted to recover energy rather it is most of time conducted to get rid off waste but it is banned in the countries with ODEC. Additionally, the ODEC countries only conduct WtE when they have plants following strict rules for emission. Incineration plants generate power for thousands of households, and in so doing put to use the energy contained in the waste. Wheelabrator is a waste-to-energy technology that converts solid waste into clean, renewable electric power. Since the 1970s, Wheelabrator facilities have turned over 145 million tons of municipal solid waste into 75 billion kilowatt-hours of energy. Each day, according to that company, they generate enough electricity to power 700,000 homes. Plasma gasification is a new WtoE technology with great promise. Researchers inform us that at least two of such plasma plants are in operation in Japan and one in Bristol, CT and are working with low emissions. According to web reports the researchers at the Center for Biotechnology at The Biodesign Institute at Arizona State University are developing an amazing new technology which will potentially have the ability to extract electricity from pollution and organic waste products. These scientists are developing are biological fuels cells. They hope their biological fuel cells will help slow global warming by cleaning excess carbon dioxide out of the atmosphere. Researchers have also used information regarding alternative landfill disposal, plant emissions, trash composition and other plant-specific data and analyzed the information using the EPA Decision Support Tool. The result was that they found that about 270,000 tons of carbon dioxide equivalent emissions are avoided annually because of one plant's operations. Clearly, extending the use of WtoE can bring great reductions in carbon dioxide emissions. For India these plants will also enable the nation to benefit from carbon credit payments paid out by the developed nations to alleviate climate change. This article courtesy of http://www.waste-technologies.co.uk. You may freely reprint this article on your website or in your newsletter provided this courtesy notice and the author name and URL remain intact. |
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