Using quail waste as an adsorbent on biogas quality Aurelia Aprilianty, Arina Manasikana, Eggi Pur Pinandita, Shafa Fa’izah, Mochammad Junus and Hary Nugroho E3S Web Conf., 335 (2022) 00052 Published online: 14 January 2022 DOI: 10.1051/e3sconf/202233500052