TY JOUR TI THE USE OF BIOGAS TECHNOLOGIES IN THE DISPOSAL OFSEWAGESLUDGE KW sewage sludge KW organic waste KW activated sludge KW biogas KW biogas technologies JO Bulletin of the Angarsk State Technical University AU Udarceva, L.V. AU Igumen'scheva, V.V. PY 2024 IS 1 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»