OPTIMIZATION OF BIODIESEL PRODUCTION FROM USED OIL OF FISH PROCESOR USING SODIUM METHOXIDE AND SULPHONATED EGG-SHELLS AS CATALYST. FJS [Internet]. 2023 Aug. 30 [cited 2025 Sep. 11];7(4):284-92. Available from: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/1929