Development and validation of ultrasound-assisted solid-liquid extraction of phenolic compounds from waste spent coffee grounds

Ultrason Sonochem. 2017 Jan:34:206-213. doi: 10.1016/j.ultsonch.2016.05.005. Epub 2016 May 20.

Abstract

In this current work, Box-Behnken statistical experimental design (BBD) was adopted to evaluate and optimize USLE (ultrasound-assisted solid-liquid extraction) of phytochemicals from spent coffee grounds. Factors employed in this study are ultrasonic power, temperature, time and solid-liquid (SL) ratio. Individual and interactive effect of independent variables over the extraction yield was depicted through mathematical models, which are generated from the experimental data. Determined optimum process conditions are 244W of ultrasonic power, 40°C of temperature, 34min of time and 1:17g/ml of SL ratio. The predicted values were in correlation with experimental values with 95% confidence level, under the determined optimal conditions. This indicates the significance of selected method for USLE of phytochemicals from SCG.

Keywords: Box-Behnken response surface design; Phenolic compounds; Spent coffee ground; Ultrasound-assisted solid-liquid extraction.

Publication types

  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Chemical Fractionation / methods*
  • Coffee / chemistry*
  • Phenols / isolation & purification*
  • Temperature
  • Time Factors
  • Ultrasonic Waves*
  • Waste Products*

Substances

  • Coffee
  • Phenols
  • Waste Products