Minimising quantities of urban sludge The problem The Bièvres-Liers county council, France, owner-operators of the Côte Saint André wastewater treatment plant, faced the problem of increased sludge, due to a rise in the number of households who would be connected to the plant. The organic sludges were initially dewatered by a belt ?lter process, then stabilised by post liming. After storage the treated sludges were re-used in agricultu

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