Delignification of Oil Palm Empty Bunch with Compressive Heat and Naoh Concentration in Separate Lignosellulose

Abstract

Delignification is a pretreatment in bioethanol processing to separate lignin and cellulose in materials containing lignocellulose such as TKKS. In the delignification process, some lignin will be dissolved. This study aimed to determine the lignocellulosic content in TKKS using the pressurized heat method and the concentration of NaOH. The study was conducted by preparing TKKS samples for alkaline delignification (NaOH) with various concentrations of 10%, 20%, and 30%. Then delignification was carried out using a hot autoclave with an absolute pressure of 4 bar, at a temperature of 120°C for 30 and 60 minutes. The research data were analyzed using Completely Randomized Block Design (CRBD) with the Polynomial Orthogonal follow-up test. The results showed that the cellulose obtained was most abundant at 10% NaOH concentration within 30 minutes, namely 58.33%, and the lowest was at 30% NaOH concentration with 47.3% 60 minutes. Then the highest hemicellulose was found in 10% NaOH concentration with a time of 30 minutes, namely 18.25%, and the lowest was at 30% NaOH with 30 minutes, namely 9.03%. Then the highest Lignin at 10% NaOH concentration with a time of 30 minutes is 10.14%, and the lowest at 30% NaOH concentration with a time of 60 minutes is 3.3%.