| http://www.w3.org/ns/prov#value | - Discharge from the drum 20 of dried sludge, with or without other components such as lime or other chemicals, is controlled via the operation of material discharge grates 84, 85, 86, 87 and 88, as are more clearly shown in FIG. 3, which discharge gates are in turn, controlled by suitable solenoids or other control mechanisms 90, 91, 92, 93, and 94, respectively, which in turn are controlled by con
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