Air quality is the main environmental concern with any combustion.
la quema de desechos sólidos es perjudicial para el medio ambiente, pero esto se hace y se reduce en un 85%. los quemadores pueden generar energía mediante dos métodos.
¿existen métodos más limpios para la transformación de desechos en energía.?
They are different incineration methods.e.g Burial pits,Landfills&Thermal heating.
Do you think ocean dumping is OK?
What is Encapsulation?
We need to encourage more reuse and recycling especially in developing countries.
About 15% of the municipal solid waste in the United States is incinerated. Incineration is the burning of solid wastes at high temperatures (>1000ºC). Though particulate matter, such as ash, remains after the incineration, the sheer volume of the waste is reduced by about 85%. Ash is much more compact than unburned solid waste.
In addition to the volume reduction of the waste, the heat from the trash that is incinerated in large-scale facilities can be used to produce electric power. This process is called waste-to-energy. There are two kinds of waste-to-energy systems:
mass burn incinerators and
In mass burn incinerators all of the solid waste is incinerated. The heat from the incineration process is used to produce steam. This steam is used to drive electric power generators.
Acid gases from the burning are removed by chemical scrubbers. Any particulates in the combustion gases are removed by electrostatic precipitators. The cleaned gases are then released into the atmosphere through a tall stack. The ashes from the combustion are sent to a landfill for disposal. It is best if only combustible items (paper, wood products, and plastics) are burned.
In a refuse-derived incinerator, non-combustible materials are separated from the waste. Items such as glass and metals may be recycled. The combustible wastes are then formed into fuel pellets which can be burned in standard steam boilers.
This system has the advantage of removing potentially harmful materials from waste before it is burned. It also provides for some recycling of materials.
As with any combustion process, the main environmental concern is air quality. Incineration releases various air pollutants (particulates, sulfur dioxide, nitrogen oxides, and methane) into the atmosphere. Heavy metals (e.g., lead, mercury) and other chemical toxins (e.g., dioxins) can also be released.
Many communities do not want incinerators within their city limits. Incinerators are also costly to build and to maintain when compared to landfills.
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