TY JOUR TI PROBLEMS OF WASTEWATER TREATMENT OF ULAANBAATAR (MONGOLIA) KW wastewater KW wastewater treatment plants KW mechanical KW biological KW physico-chemical purification and post-treatment of wastewater KW sludge pads JO Construction and industrial safety AU Ambrosova, G.T. AU Shonhor, G.. AU Ukolova, K.I. AU Rafal'skaya, T.A. PY 2024 IS 0 PB V.I. Vernadsky Crimean Federal University