
Landfarming is a bioremediation treatment process that is performed in the upper soil zone or in biotreatment cells. Contaminated soils, sediments, or sludges are incorporated into the soil surface and periodically turned over (tilled) to aerate the mixture. ==Applicability== This technique has been used for years in the management and disposal of...
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http://en.wikipedia.org/wiki/Landfarming

(from the article `environmental works`) Biological treatment of certain organic wastes, such as those from the petroleum industry, is also an option. One method used to treat hazardous ...
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http://www.britannica.com/eb/a-z/l/12
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