Start Date: Oct 01, 2010
End Date: Aug 31, 2011
A pilot scale process for producing poultry blood-based flocculant will be developed. For each step in the production process, various technologies will be evaluated in terms of cost and retention of flocculant activity. These steps include clotting inhibition, fractionation, decoloration, concentration and dehydration. Separately, new methods for increasing the yield and molecular weight of soluble peptides extracted from rendered animal protein will be developed. Both mechanical dissagregation and selective enzymatic hydrolysis will be used, alone and in combination, to increase extraction yields. The application range for animal protein based polyacrylamide (PAM) substitutes will be broadened by testing their effectiveness in several applications including algae flocculation, mine tailings flocculation, paper slurry dewatering, municipal sewage sludge settling, and ethanol processing solids settling. These investigations will exclude any direct release of the experimental agents into the environment. Separately, the growth factor content of experimental peptones will be increased using two different approaches, harvesting from raw material liquids upstream of rendering, as well as minimizing growth factor destruction during peptone production process.