Waste Reduction
One the way on how to reduce waste from industry do by use on power generator as fuel material substitution. To use waste as raw material subtitute waste is not easy because there are a limitation on how to use this waste as material especially if those waste is hazardous waste. There are calory requirement that should contain on the waste, for certain country the waste should contain of minimum 2500 calory. Some inceneration service modify by mixing certain waste with other material or other waste in order get higher calory contain.
Energy recovery perhaps the easiest way to remove waste either dispose waste that often make contamination to other place. About 70% to 80% of residential and commercial solid waste is combustible and it has about one third the heating value of an equal weight of coal.
The energy can be recovered in several ways. First, the raw waste can be incenerated with the heat used to produce steam for heating buildings, noncombustible materials can be recovered from the ashes. Second, the refuse can be shredded into small pieces, then air classified by blowing the waste up into a column, separating out the light material (termed RDF, for refuse derived fuel), which is suitable as fuel, the heavy material remaining at the bottom of the column contains reclamable metals and glass. Third, the separated combustibles can be incinerated in clean combustion units, such as fluidized beds, to produce electricity. Finally, the lighter organic wastes may be decomposed chemically by Pyrolisis to produce oil or gas fuels.
With the cost of energy increasing in the 1970s, the use of the energy content of solid wastes began to receive more attention. Several cities have constructed or are planning facilities to extract energy from waste. Many energy recovery plants are already in operation or are undergoing testing in the United Stated.
Effort to increased the extraction of energy and materials from urban refuse will continue as the cost of energy, disposal and raw materials rise. Although the movement toward recycling and energy production from waste may be helpful, it is not expected to reduce waste disposal loads so long as a high consumptio, throughaway society continues to generate increasing quantities of discharded material.
Energy recovery perhaps the easiest way to remove waste either dispose waste that often make contamination to other place. About 70% to 80% of residential and commercial solid waste is combustible and it has about one third the heating value of an equal weight of coal.
The energy can be recovered in several ways. First, the raw waste can be incenerated with the heat used to produce steam for heating buildings, noncombustible materials can be recovered from the ashes. Second, the refuse can be shredded into small pieces, then air classified by blowing the waste up into a column, separating out the light material (termed RDF, for refuse derived fuel), which is suitable as fuel, the heavy material remaining at the bottom of the column contains reclamable metals and glass. Third, the separated combustibles can be incinerated in clean combustion units, such as fluidized beds, to produce electricity. Finally, the lighter organic wastes may be decomposed chemically by Pyrolisis to produce oil or gas fuels.
With the cost of energy increasing in the 1970s, the use of the energy content of solid wastes began to receive more attention. Several cities have constructed or are planning facilities to extract energy from waste. Many energy recovery plants are already in operation or are undergoing testing in the United Stated.
Effort to increased the extraction of energy and materials from urban refuse will continue as the cost of energy, disposal and raw materials rise. Although the movement toward recycling and energy production from waste may be helpful, it is not expected to reduce waste disposal loads so long as a high consumptio, throughaway society continues to generate increasing quantities of discharded material.
Labels: Waste Treatment
posted by Margi @ 9:00 AM
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