OPTIMIZATION STUDY OF PHENOLIC EXTRACTS FROM RICE BRAN ENCAPSULATION WITH SPRAY DRYING
Rice bran is one of the byproducts of rice that contains bioactive compounds such as phenolic compound. phenolic compounds are beneficial as an antioxidant, anticarcinogenic, and antimicrobial. While much research has been conducted on encapsulation, there is limited research on changes in the co...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/84437 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Rice bran is one of the byproducts of rice that contains bioactive compounds such as
phenolic compound. phenolic compounds are beneficial as an antioxidant,
anticarcinogenic, and antimicrobial. While much research has been conducted on
encapsulation, there is limited research on changes in the content of phenolic compounds,
particularly from rice bran extract, during the drying process. This research aims to
optimize the extraction and drying process with encapsulation of phenolic compounds
from rice bran. The objective of this research is to find the optimal amount of coating
material and temperature to produce rice bran extract with maximum Total Phenolic
Content (TPC) and to determine the effect of the amount of coating material and
temperature during the drying process. The production of rice bran extract was carried
out in two main stages: extraction and encapsulation. Extraction was performed using
microwave-assisted extraction (MAE) and 80% ethanol as the solvent.
Drying and encapsulation were performed using the spray drying method with a coating
material mixture of maltodextrin and gum arabic (1:1) at concentrations of 0-1.6% (w/v)
and operating conditions with air temperatures ranging from 120-195°C, sample flow rate
of 5 mL/min, nozzle air flow rate of 28 NL/min, and drying air flow rate of 0.47 m³/min.
Analysis was conducted to measure TPC using the Folin-Ciocalteu assay and to measure
the percentage of powder loss during drying. A model was developed to predict the drying
process using ODE equations by curve fitting in Ms Excel. From this research, it was
found that the optimal amount of coating material and temperature were 0.8% and 175°C
with a TPC of 20.7 mgGAE/g and a powder loss percentage of 64%. However, the
optimal temperature based on modeling was 175.2°C. Comparison of model results based
on research data, data from Mardiah (2023), and data from Mishra (2014) showed
differences in the reactions occurring during the drying process and differences in
reaction kinetic parameters |
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