Large Scale Fixed Bed Ion-Exchange System for Removing Strontium-90 from Fluid Milk. I. Processing Results

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Abstract
A large scale fixed bed ion-exchange system for removing Sr90 from fluid milk is described. The plant was operated over a period of 10 mo. processing a total of 413,000 1 of milk at flow rates of 5,700 1/hr. during an 8 hr. run. No unusual processing problems were encountered. The plant was fully automated (except for re-use of regenerant), constructed of stainless steel and other approved materials, and in compliance with 3-A Standards where applicable. Processing conditions were based on data obtained at Beltsville for flow rates, pH adjustment, regenerant composition, and sanitation control. The processed milk, although organoleptically acceptable, was spray dried and utilized for animal feed. In the event that environmental contamination should exceed safe tolerances, this process is a feasible and practical means for substantially reducing the levels of Sr90 in milk.