Abstract

A bacterial virus-encoded endodepolymerase has been shown to decompose exopolysaccharide slime produced by its sewage sludge-derived bacterial host. Substantial viscosity reduction and increased centrifugal compaction of a single slime-producing microbial slurry were achieved on enzyme addition. This demonstrates the feasibility of improving mechanical dewatering of biological sludges by use of enzymes in which the slime entrapped water is released and becomes more readily available for separation from the sludge solids matrix.

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