Production of Amino and Organic Acids from Scallop Wastes Using a Continuous Type, Small Scale Apparatus Sub-Critical Water Extraction and Hydrolysis

Omid Tavakoli and Hiroyuki Yoshida. Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-Cho, Sakai, Osaka Prefecture, 599-8531, Japan

Scallop wastes as proteinaceous and/or organic wastes contain a lot of protein molecules which produce amino and organic acids under hydrolysis reaction. In this study, sub- and supercritical water hydrolysis of scallop viscera wastes has been studied in a small scale continuous apparatus. Experiments were performed at a temperature range of 443-673 K with the reaction time between 1-30 minutes. Through hydrolysis reaction, this method produced valuable materials such as amino acids, organic acids, soluble proteins and peptides. Among all produced amino and organic acid, the glycine and pyroglutamic acid were produced with a very high rate compare to the others. Experimental results demonstrated that this technique brings apposite into harmony for a sustainable future and it was not only energy saving, environmentally friendly and cost effective but also produced many useful materials with zero emission.