Optimization Of Used Cooking Oil Into Biodiesel With Sulfated Zirconia Zeolit Catalyst - Sukmawati, Paramita Dwi; Jurusan Teknik Lingkungan Institut Sains & Teknologi AKPRIND Yogyakarta Jl. Bima Sakti No.3 Pengok Yogyakarta 55222 (Seminar Nasional Teknik Kimia Kejuangan, 2016)