Proteins concentrate production of Clam offal, Megapitaria squalid, and some of its chemical properties

Due to the growing interest for animal protein, production of high value-added products from waste, in terms of nutritional value, is more important. The Megapitaria squalid is important in terms of nutritional value. In this study, clam offal for protein extraction and evaluation of them in term of protein solubility, nitrogen recovery and chemical composition at room temperature using changes in pH was studied. The basis is on, protein extraction at alkaline and acidic conditions then precipitation at the isoelectric point. Based on the results about 93% of offal initial proteins were resolved at pH 11. Protein precipitation and protein recovery of raw materials was respectively 89% and 84% of the initial protein of offal. The protein solubility of raw materials at alkaline and acidic pH using polyacrylamide gel was evaluated. The result of gel was also confirming the results of the high solubility of the protein at alkaline pH. The amounts of protein and amino acids in the protein concentrate obtained by 72.7% and 663.23 milligrams per gram (dry weight basis), respectively. This study showed that the use of alkaline conditions at pH 11 for protein recovery of Clam waste and conversion into a high value-added material is useful. Finally, the product can be used as a food supplement in animal and human food.