How can we keep animal hydrolyzed proteins at differrent pH 2-3, neutral or pH 9-10? How to keep them?

I want to hydrolyze animal by product to amino acids and keep them for animal feed or fertilizer. How long can we keep animal protein lysates at pH 2 - 3,5, or pH 9 - 10? How about the stability...

08 March 2019 750 5 View