Paper Title
Preparation Of Active Coating Materials Using Fish Skin Gelatin And Spent Coffee Ground Extracts

Abstract
Edible coatings produced with biopolymers from renewable sources have the ability to carry active compounds; thus, they can be used as active food packaging. Active packaging is an innovative packaging that performs some functions, such as delay oxidation, inhibit microbial growth and control respiration rate, other than providing a barrier property. Gelatin is a well-known biopolymer among the animal proteins for its edible coating formation. Gelatin can be obtained from the fish skin which is a waste material in fish process industries with an estimated annual production of 100 million tons. Synthetic antioxidants and antimicrobial agents have been used in edible coating formulations. However, there is a growing safety concern due to their. Thus, natural antioxidants, such as plant extracts, are getting more attention. Spent coffee ground (SCG) is the main waste from coffee processing industries with annual production of about 6 million tons. SCG has been reported to possess high antioxidant and antimicrobial activity. Thus, the effective valorization of these huge wastes could greatly contribute in alleviating disposal problem. Therefore, the aim of this study isto produce edible coating from fish skin gelatin enriched with SCG extract and study its antioxidant and antimicrobial activity.Gelatin was extracted from big eye tuna skin using acid and hot water hydrolysis. SCG extract was obtained using hot water extraction followed by freeze drying. The edible coating will be produced at different concentration of SCG extracts and same concentration of a known synthetic antioxidant will also be used for comparison purpose.