De-Watering of Radioactive Sludge by Super-Decanter Centrifuge

Abstract

Volume reduction of radioactive sludge by de-watering is important in the chemical treatment of radioactive liquid wastes. The de-watering characteristics of super-decanter type centrifuge for ferric hydroxide sludge has been investigated experimentally. The results obtained include the relation of sludge removing efficiency to feed rate, the correlation of centrifugal force with volume reduction factor and with radioactivity eluted from the sludge. Addition of polymer as coagulating agent is effective in improving the treating capacity and in shortening the settling time after separation. Experiments were performed to determine the conditions for adding the polymer to obtain optimum coagulation of the sludge. © 1970, Atomic Energy Society of Japan. All rights reserved.