PRODUCTION OF POWDERED BIOACTIVE SUBSTANCES AS FUNCTIONAL FOOD RAW MATERIALS FROM RICE BRAN

• Main Author: Hanabila Makarima, Nadia
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/80073
• Institution: Institut Teknologi Bandung

Indonesian rice production reached 54.604 million tons in 2021. Of the total, 4.52 million tons are rice bran, mainly used for animal feed. However, rice bran contains phenolic compounds that can function as antioxidants, anti-cancer, and prevent cardiovascular disease and diabetes. Drying plant extracts containing phenolic compounds has been known by several drying methods, such as freeze drying and spray drying, using various coating materials and concentrations. Freeze and spray drying methods were carried out to determine the effect of the thermal process on the resulting powder. The coating materials in the spray drying method can protect the sample from the thermal process. From previous research, no research has analyzed the effect of thermal processing and the type of coating material on total phenolic content (TPC) and antioxidant activity (AA) in rice bran powder during particular shelf life. This research aims to produce phenolic powder from rice bran with various drying methods and coating materials such as freeze drying, spray drying without coating material, and spray drying with the coating material of gum arabic and the coating material of the mixture of maltodextrin and gum arabic (50/50). Total phenolic content (TPC) was analyzed by the Folin-Ciocalteu test, and antioxidant activity (AA) was analyzed by the DPPH test. The drying results showed that the highest TPC values were obtained using spray drying with maltodextrin and a maltodextrin-gum arabic mixture (50/50) at 130.66 mg GAE/g extract and 130.91 mg GAE/g extract, respectively. The best TPC value after 4 weeks of storage was achieved using spray drying with maltodextrin as the coating agent, yielding 128.88 mg GAE/g extract. The highest AA values immediately after drying and after 4 weeks of storage were obtained using spray drying with gum arabic as the coating agent, with AA values of 440.11 mg antioxidant/g extract and 307.74 mg antioxidant/g extract, respectively. The best variation to maintain the stability of phenolic compounds in the powder during storage was found in spray drying with maltodextrin as the coating agent.