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A coal-fired power plant with ash ponds. Bottom ash is part of the non-combustible residue of combustion in a power plant, boiler, furnace, or incinerator.In an industrial context, it has traditionally referred to coal combustion and comprises traces of combustibles embedded in forming clinkers and sticking to hot side walls of a coal-burning furnace during its operation.
Incinerator bottom ash (IBA) is a form of ash produced in incineration facilities. [ 1 ] [ 2 ] This material is discharged from the moving grate of municipal solid waste incinerators. [ 3 ] [ 2 ] Once IBA is processed by removing contaminants, it can be used as an aggregate.
An ash pond, also called a coal ash basin or surface impoundment, [1] is an engineered structure used at coal-fired power stations for the disposal of two types of coal combustion products: bottom ash and fly ash. The pond is used as a landfill to prevent the release of ash into the atmosphere.
Food plots differ from revegetation, which is intended to stabilize and rebuild the soil of disturbed land using naturally growing grasses, legumes, shrubs, and trees. Food plots are intended to feed wildlife rather than rebuild the soil, and generally use agricultural forages rather than native or naturally occurring plants.
Huge amounts of coal ash and other waste is produced annually. Use of coal generates hundreds of millions of tons of ash and other waste products every year. These include fly ash, bottom ash, and flue-gas desulfurization sludge, that contain mercury, uranium, thorium, arsenic, and other heavy metals, along with non-metals such as selenium. [139]
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Photomicrograph made with a scanning electron microscope and back-scatter detector: cross section of fly ash particles. Fly ash, flue ash, coal ash, or pulverised fuel ash (in the UK)—plurale tantum: coal combustion residuals (CCRs)—is a coal combustion product that is composed of the particulates that are driven out of coal-fired boilers together with the flue gases.
Slash-and-burn fields are typically used and owned by a family until the soil is exhausted. At this point the ownership rights are abandoned, the family clears a new field, and trees and shrubs are permitted to grow on the former field. After a few decades, another family or clan may then use the land and claim usufructuary rights. In such a ...