Enhancement of biogas production from rice husk using mechanical pretreatment (grinding) in Liquid Anaerobic Digestion (L-AD)Syafrudin, Winardi Dwi Nugraha, Soraya Annisa Putri, Hashfi Hawali Abdul Matin and BudiyonoE3S Web Conf., 202 (2020) 08003DOI: https://doi.org/10.1051/e3sconf/202020208003