PENGARUH UKURAN PARTIKEL BIOADSORBEN AKAR ALANG-ALANG (Imperata cylindrica L) TERHADAP KUALITAS MINYAK JELANTAH

Abstract

"Minyak jelantah" is used to refer to cooking oil that has been used multiple times. Besides its unappealing color and rancid smell, "minyak jelantah" also has the potential to cause harm to the body. It fails to meet the requirements of the Indonesian National Standard (SNI) 7709:2019 and cannot be used for cooking. This study aimed to adsorb compounds that affect the quality of the used cooking oil, such as free fatty acid, peroxide value, water content, and lead metal contamination, using Imperata cylindrica L (alang-alang) root bioadsorbent. The bioadsorbent was used in three mesh sizes (60, 80, and 100) at 10% and adsorbed for 60 minutes. The results showed that the quality of the used cooking oil improved after adsorption. However, the free fatty acid and water content of the oil did not meet the SNI quality requirements. On the other hand, the peroxide value test with a mesh size of 100 met the SNI requirement of 8 mEq O2/kg, and the lead metal contamination test with mesh sizes of 60 and 80 met the SNI quality requirement of ≤0.01 mg/L. Therefore, the used cooking oil after adsorption using Imperata cylindrica L bioadsorbent does not meet the Indonesian National Standard (SNI) 7709:2019 for usable cooking oil.