Effect of Alkali Pretreatment on Enzymatic Hydrolysis of Gracilaria sp. Josua Daniel Manurung, Uju, Joko Santoso, Yanni Sudiyani, Roni Maryana and Ekowati Chasanah BIO Web Conf., 147 (2024) 01028 Published online: 10 January 2025 DOI: 10.1051/bioconf/202414701028