TY JOUR TI TO THE QUESTION OF ACIDIFICATION OF PRIMARY SEDIMENTATION SLUDGE IN TANKS OF SEWAGE TREATMENT STATIONS IN POPULATED AREAS KW wastewater treatment KW acidification KW primary settling tanks JO Bulletin of KSAU AU Sakash, G.V. AU Kolova, A.F. AU Pazenko, T.Y. PY 2016 IS PB Krasnoyarsk State Agrarian University