Study on utilization of lactic acid for the decalcifying of the shrimp head and shell

Hong Wang, Jianfeng Sun and Ji

Abstract

In this study, lactic acid was used to extract chitin by decalcifying shrimp heads and shells of penaeus vanmamei with ultrasonic -assisted. A Box–Behnken design with three variables and three levels was applied in order to approach the prediction of optimal the lactic acid concentration, the liquid-solid ratio and the reaction time on the demineralization degree with lactic acid. These optimal conditional were: with the ultrasonic assisted, the lactic acid concentration of 11.50%, the liquid-solid ratio of 26:1(mL/g ),and the reaction time of 95 min allowing to obtain chitin, which ash content was predicted at 0.35±0.05(g/100g), and the chitin would be used in the food industry.