#TITLE_ALTERNATIVE#

• Main Author: Theda - Nim: 11214014 , Yohanes
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31758
• Institution: Institut Teknologi Bandung

<p align="justify">The aim of this study was to evaluate the effect of biodegradation pretreatment using A. niger on turmeric oil yield, rhizome starch content, and turmeric oil chemical composition. Biodegradation pretreatment was done in a solid-state fermentation system, and turmeric oil was isolated using steam distillation. The fermentation was carried at room temperature (average: 26.9°C), relative humidity of 99%, and light intensity of approximately 0 lx. The steam distillation was performed at 300°C heating temperature for 3 hours. The free variable studied in this research was incubation period. Turmeric oil yield reached 1.4% dry weight, 1.8% dry weight, and 1.9% dry weight at the 7th, 9th, and 11th day, respectively. Rhizome starch content fell to 6.6%, 5.8%, and 5.4% at the 7th, 9th, and 11th day, respectively. A good agreement among oil yield, starch content, and period of incubation was observed. Oil yield increased as the rhizome starch content decreased and the period of incubation increased. The incubation of A. niger with turmeric rhizome had a positive effect on antioxidant contents as the result of structural polymer degradation. It was observed that the content of &#945;-turmerone increased from 14.8% to 15.3%; and &#946;-turmerone rose from 38.4% to 45.3% after a 7 days of incubation period. Biodegradation pretreatment of turmeric rhizome was estimated to be able to increase turmeric oil productivity up to 33.5 kg/ha/yr. <p align="justify"> <br />