Enzymic hydrolysis was used to recover a potentially edible high protein
hydrolysate from mechanically deboned turkey residue (MDTR), a turkey
processing waste. The hydrolysis process reduced the weight of the original
MDTR by 51% on a dry weight basis, and recovered 46% of the MDTR
proteins. The hydrolysate contained 78% protein, 4"6% ash and only 5.7% fat.
The proteins consisted mainly of amino acids and small peptides with
molecular masses lower than 6"5 kD due to a high degree of hydrolysis
(65- 70%), and were very soluble in water over a wide pH range. It had a
yellowish colour, was rich in calcium, phosphorus, potassium and magnesium
and had a large monolayer value, but had low viscosity and low emulsion
capacity at pH values of 4, 7and 10. Its buffering capacity was at a minimum
between pH 5 and 7.