Results of experimental studies of a small-volume biogas plant Ilnur Kh. Gayfullin, Bulat G. Ziganshin, Zulfiya M. Khaliullina, Olga S. Semicheva and Artyom V. Shornikov BIO Web Conf., 161 (2025) 00012 Published online: 27 February 2025 DOI: 10.1051/bioconf/202516100012