TY JOUR TI Research into transient periodic processes of wastewater cyclotank aerobic treatment with biological sludge KW aeration KW aerotank KW biological filter KW biological treatment KW sludge KW communal facilities KW cyclotank JO Services in Russia and abroad AU Lebedev, V.. AU Gubanov, N.. AU Tyger, L.. PY 2014 IS 8 PB Russian State University of Tourism and Service