TY JOUR TI THEORETICAL SUBSTANTIATION OF THE USE OF BIOMETHANE IN GAS SUPPLY SYSTEMS KW gas consumption KW gas supply system KW biomethane KW biomethane plant KW economic costs JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Suslov, D.Y. PY 2021 IS 6 PB Belgorod State Technological University named after V.G. Shukhov