Abstract
Raw primary sewage sludge and a chicken manure was solidified by mixing with fly ash and Portland cement. By varying the proportions of sludge solids, fly ash, and cement in a mix, it was possible to control the time required for final set, and the physical properties of the resulting solid matrix. A maximum of 3.3% of the input phosphate was leached from the matrices over a 15-day period. Phosphates are efficiently incorporated into the solid matrix.
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