The City of Bloomington Utilities (CBU) currently uses drying beds to dewater alum residuals prior to landfill disposal. The beds do not have sufficient capacity to process current residuals production, much less future quantities. Landfill restrictions guided the City to dewater the solids to a total solids concentration exceeding 50 percent. A relatively new thermal drying process was selected after an evaluation of options, which included mechanical dewatering and natural drying options. Information on the evaluation, equipment selection, and costs is included.
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Document Type: Research Article
Publication date: 2001-01-01
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