The effect of temperature on lignin purification from bioethanol production waste based on palm oil empty fruit bunch

Abstract

In this study, the optimal condition of lignin purification from bioethanol production waste based on palm oil empty fruit bunch has been conducted. Purification of Lignin through two steps are impurities precipitation in pH 7 and lignin purification in pH 2 simultaneously with variation temperature. The concentration of lignin determines by spectrophotometer UV-Vis and thermal analysis to determine the ratio of lignin content and residual content. It was found that in lignin purification step, the lowest lignin concentration is at temperature 30°C with the concentration of lignin is 8.388% and the highest residual content is at temperature 60°C with % residual combustion is 26.652%. The optimal temperature at pH 2 for lignin purification is 50 °C with a lignin concentration is 73.854% and the residual combustion is 27.956%.