Unfortunately, the waste seculars that atomic number 18 no longer going into our streams and rivers or into the air are being deposited nighwhere. These air and water improvements did not come from an elimination of the consultation material but simply from a redirection of the material. In nigh cases, commercial incinerators were used to reduce the amount of waste material into an alter that was disposed of in industrial landfills. Often the ash had higher concentration of contaminants than did the original material. The heat generated from this type of cultivate was sometimes used to produced electrical power. More often than not, however, it was scattered to the atmosphere and consequently wasted.
Although the volume of materials being disposed of in the water and the air was reduced, wastes were simply being moved into landfills.
Although some landfills are considered a secure and effective means of disposal, numerous sites have also added to the problem by adding to ground-water contamination through and through leaching and other percolatin
intervals, thus causing flame instability and very often flameouts.
kiln. The woof of equipment is dependent on the materials physical properties. This is highly important because 10-15 percentage of the total processing costs can be incurred in the preparation of the raw materials as compared to 40-60 percent in burning. The sequences of operations used in preparing the raw feed for the dry and semi-dry processes are shown in Figure 5. Figure 6 details schematically the general manufacturing process for Portland cement.
Luoma, Jon R. "Burn Garbage for Electricity? Yes, No, Maybe." Audobon, bound 1990, pp. 96-97.
Milne, Roger. "Safer Sewage Wins Environmental Award," New Scientist, March 3, 1988.
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