EVALUATION OF THE TOXICOLOGICAL RISK ASSOCIATED WITH THE USE OF POLYACRYLAMIDES IN THE RECOVERY OF NUTRIENTS FROM FOOD-PROCESSING WASTE .2.

Experiments were conducted using radiolabeled acrylamide and liquid sc intillation counting methods to determine how acrylamide monomer would partition during the solid/liquid separation and subsequent rendering of a poultry processing waste. Due to its nutritive value, the render ed solids from such a full-scale food processing waste operation could potentially be used as a component of animal feed. Previous studies w ere unable to directly measure acrylamide in the solids samples after separation. Based on the analytical data herein, similar to 1% of the original radiolabel administered to the waste system was detected in t he rendered solids. In a full-scale food processing waste operation, t his would represent a maximum level of 0.3 ppb acrylamide in the final animal feed with more typical levels, reflecting industry use, being similar to 0.05 ppb. These levels are an order of magnitude less than those calculated in the previous experiment, confirming the associated risk as de minimis.