The Effect of Fly Ash Activation as An Adsorbent For Reducing The Free Fatty Acid Content in Waste Cooking Oil Heni Anggorowati, Perwitasari, Muhammad Syukron, Ferdi Surya Maulana, Maya Maudina Nurpradini
Universitas Pembangunan Nasional ^Veteran^ Yogyakarta
Abstract
Waste Cooking Oil (WCO) is an oil waste that, if improperly disposed of and not well processed, can lead to environmental pollution, especially in soil and water. WCO contain of free fatty acids (FFA) that needs to be processed before being used as raw material for biodiesel production. Previous studies have shown that FFA in WCO can be reduced through adsorption. This study focused in the effect of fly ash activation as an adsorbent for reducing the FFA content in WCO. The activated fly ash was analyzed to determine the capacity of adsorption and to identify the chemical compounds. As an initial study, varying concentrations of NaOH (1 N, 2 N, and 3 N) were used for fly ash activation. The activated fly ash were used for FFA adsorption in 30 ml of WCO for 4 hours. The highest FFA reduction percentage, 62.11%, was achieved with 3 N NaOH concentration.
