35—THE TREATMENT OF WOOL-SCOURING EFFLUENT: CENTRIFUGATION STUDIES

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Abstract
An account is given of an investigation in which an attempt was made to isolate the reasons for the apparently inevitable limitation in the recovery of grease from wool-scouring liquors in a centrifuge, as a prelude to the development of a process to treat effluent discharged from the primary centrifuge before biological processing. The recovery of grease with a centrifuge from a wool-scouring liquor that has not been excessively agitated is shown to depend primarily on the composition of the disperse-phase particles. The composition of those particles not capable of being separated in a centrifuge is almost solely dependent on the quantity and density of detergent employed in scouring. Excessive agitation of the scouring liquor dramatically reduces recovery and should be strictly avoided.