PENGURANGAN KADAR ASAM LEMAK BEBAS (FREE FATTY ACID) DAN WARNA DARI MINYAK GORENG BEKAS DENGAN PROSES ADSORPSI MENGGUNAKAN CAMPURAN SERABUT KELAPA DAN SEKAM PADI

Cooking oils that used frequently will be destructed the physical and chemical of its composition and structure. The treatment of waste cooking oil is challenging due to the pressure of undesirable component such as FFA and colour degradation. This research aims are investigated the ability of mixed adsorbent from rice husk and coir coconut fiber to reduce FFA and colour of waste cooking oil. The adsorbent was activated with H3PO4 1 M. This adsorben use about 5, 10, and 20% of weight waste cooking oil with composition mixing adsorbent of rice husk and coir coconut fiber 30:70 ; 70:30 ; 50:50 ; 100:0 and 0:100 have prepared. Adsorben put into beaker glass of waste cooking oil then batch adsorption proccess was going on about 1 hour use heater and magnetic stirrer with mixing speed 100 rpm and temperature 80oC, then filtered and analyzed in order of FFA, colour, density, and water content. As the result, the best dose adsorben for maximum reduce FFA was 20% of weight waste cooking oil with composition mixing adsorbent of rice husk and coir coconut fiber 30:70 which gave FFA was 0,294% and value of colour was 295 PtCo.The effectivity reduce for FFA was 57,07% and value of colour was 37,04%.