TY JOUR TI AGROECOLOGICAL ASSESSMENT OF WASTEWATER SLUDGE AT WASTE WATER TREATMENT PLANT OF KRASNOYARSK KW sewage sludge KW sewage treatment plants KW humidity KW the content of organic matter KW total ni-trogen KW heavy metals KW hazard index JO Bulletin of KSAU AU Demidenko, G.A. PY 2018 IS PB Krasnoyarsk State Agrarian University