ADSORPSI SENYAWA FENOLIK DENGAN BIOSORBEN KULIT JERUK: PENGARUH KONDISI OPERASI DAN METODE REGENERASI

• Main Author: Indah Trifenasari, Yunitza
• Format: Final Project
• Language: Indonesia
• Subjects: Teknologi makanan
• Online Access: https://digilib.itb.ac.id/gdl/view/84195
• Institution: Institut Teknologi Bandung

The food industry in its processes produces various types of waste, one of which is liquid waste. Liquid waste often contains hazardous compounds, such as high concentrations of phenolic compounds, classifying it as hazardous and toxic waste (B3). One method to reduce phenolic compounds in industrial waste is adsorption, using activated carbon adsorbents derived from orange peel. Besides being low-cost, the use of orange peel as an adsorbent supports the circular economy principle by reducing waste from the food industry and recycling existing resources. This study aims to determine the influence of adsorbent dose, contact time, and biosorbent regeneration method on the capacity and efficiency of phenolic compound adsorption and to identify the appropriate isotherm and kinetic models to describe the adsorption process. The study is conducted using a batch adsorption method with synthetic phenol solution as the adsorbate. In the first stage, the adsorption process (cycle 1) is carried out with dose variations of 12 g/L, 24 g/L, and 48 g/L and contact time variations ranging from 0-180 minutes. The next stage involves variations in regeneration methods (cycle 2) with physical regeneration at 800°C, and chemical regeneration (HNO3 and H2SO4). Based on the experiments conducted, the best dose for adsorbing phenolic compounds is 48 g/L, as it has the highest adsorption capacity and efficiency of 5.9 mg/g and 90.43% at the 180th minute. The regeneration method that results in the highest adsorption efficiency (99.95%) is chemical regeneration. Activated carbon adsorption with chemical regeneration (HNO3) was studied up to three cycles, resulting in a higher adsorption efficiency of 99.69%. In this study, the Langmuir isotherm model and the pseudo-second-order kinetic model were the most representative in describing the adsorption process.