The potential solvent for tannin extraction as a feed additive made of coffee husk (Coffea canephora) using Soxhlet Method

Abstract

The purpose of this research was to determine the best of solvent for extracting tannins as a feed additive from coffee husks using the soxhlet method. The method used was quantitative with a completely randomized design experimental. The coffee husk used was a type of Robusta taken from the Kaliwates Region, Jember Regency, Indonesia. The material was the waste from the grinding of coffee cherries, namely the pericarp (parchment, pectin layer, pulp, and outer husk). This research consisted of 3 treatments (P1: Methanol, P2: Ethanol, P3: Acetone), each treatment consisted of 3 replications. The variables were the tannin extracts and residue of tannin extracts. The results showed that different types of tannin solvents had a significant effect on the tannin extracts yield and residue of tannin extracts (P<0.05). Methanol and ethanol solvents produced higher tannin than acetone solvents: 0.5392%, 0.6120%, and 0.2457% respectively. Coffee husk with ethanol solvent gave the least residue compared to methanol and acetone: 61.64%, 66.89%, and 85.26% respectively. The conclusion of this research was Ethanol is a solvent that produces the highest total tannin (0.6120%) and the lowest residue (61.64 ± 0.6688%) from coffee husks compared to methanol and acetone. The result of this research can be used as a consideration for the tannins extraction of other plantation waste.