Hydrolysis of Cellulose from Oil Palm Empty Fruit Bunch using Aspergillus niger Sri Sugiwati, Suaidah Suaidah, Eka Triwahyuni, Muryanto Muryanto, Yosie Andriani and Haznan Abimanyu E3S Web Conf., 226 (2021) 00042 Published online: 05 January 2021 DOI: 10.1051/e3sconf/202122600042