DLSU Senior High School Research Congress Conference Proceedings
Document Type
Paper Presentation
Research Advisor (Last Name, First Name, Middle Initial)
Gurtiza, John Albert D.
Abstract/Executive Summary
The global demand for renewable energy sources necessitates exploring sustainable alternatives to fossil fuels. Coffee husks, a significant agricultural waste product, represent a potential feedstock for biofuel production. This study investigated the comparative efficacy of steam distillation and Ultrasonic-Assisted Extraction (UAE), using ethanol as a solvent to extract crude extract from Coffea canephora husks. A comparative experiment was conducted using 200g of Coffea canephora husks for each extraction method replicated three times and the yields were measured in mL. An independent sample t-test was used to compare the mean yields between the two methods. UAE yielded significantly more crude extract (mean=303.33 mL, SD=55.08 mL) than steam distillation (mean=170 mL, SD=26.46 mL) (t=-3.78, df=4, p=0.019). Ultrasonic-assisted extraction (UAE) yielded significantly more crude extract from Coffea canephora husks than steam distillation, despite greater variability in UAE yields. However, further research is needed to characterize the extracted material and explore its potential applications. Future research should focus on the chemical characterization of the extract, comparison with other extraction methods, and investigation of possible applications in biofuel production or other industrial uses. Larger sample sizes are also recommended to enhance statistical power.
Keywords
coffee husks; crude extract; ethanol; steam distillation; ultrasonic-assisted extraction