PRELIMINARY DESIGN OF CASSAVA TUBER (MANIHOT ESCULENTA) VALORIZATION SYSTEM FOR THE PRODUCTION OF TAPIOCA STARCH, BIOCOMPOSITES, BIODEGRADABLE PLASTIC, AND CELLULOSE NANOFIBER

• Main Author: Mikha
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/69943
• Institution: Institut Teknologi Bandung

The use of plastic for various functions has been increasing every year, unfortunately wates of theses plastics is difficult to be degraded by nature. The solution to this problem is substitution of fossil-based plastic being used today with biodegradable plastic. One type of biodegradable plastic is made from bacterial fermented cellulose by Acetobacter sp. Liquid wastes from tapioca flour industries that harm water sources in Indonesia can be used as a fermentation medium for Acetobacter sp. The aim of this research is to produce bacterial cellulose which has high yield, productivity, and degradability. The research began by varying the amount of carbon and nitrogen added to the liquid waste at the ratio of 9:1, 9:2, and 9:3. To find the optimum fermentation time, the incubation time of bacteria is varied within 1 to 3 weeks. The highest productivity of 7.08 grams/(L.week) is produxed at carbon to nitrogen ratio of 9:2 in 2 weeks fermentation time. The highest yield of 28.73% (cellulose/carbohydrate) is produced at carbon to nitrogen ratio of 9: 3 in 3 weeks fermentation time. The highest degradation rate of 18.56% is produced at carbon to nitrogen ratio of 9:2 in 2 weeks fermentation time. Concluded from those findings, the optimum bacterial cellulose production is produced at carbon to nitrogen ratio of 9:2 in 2 weeks fermentation time.