Biogas Production from Canteen Wastes Using a Vertical Anaerobic Digester - Soeprijanto Soeprijanto; Juzma Ilmahur Mawaddah; Rexy Widya Tauchid; Anfi Reynikha Fatullah; Sashi Agustina (Prosiding Seminar Nasional Teknik Kimia "Kejuangan", 2019)