Effects of Primary Settler on Activated Sludge Operation

Yayın Aralığı: Yılda 3 Sayı
Başlangıç: 2016
Yayıncı: Harran Üniversitesi

In this study, the effects of pre-precipitation unit on activated sludge unit were investigated. An aerobic activated sludge processes treating domestic wastewater designed on the basis of theoretical calculations for two different case – in the presence and absence of primary settler. A domestic wastewater containing 650 and 530 mg/L total and biodegradable COD treated in an activated sludge process in the presence and absence of primary settling respectively. It is calculated that presence of primary settling decreased the total excess sludge (an average 33%), total mass in the system (34%) reactor volume (34%) and oxygen requirement (23%) in the activated sludge system. Presence of primary settler removes a portion of total COD in the influent and therefore it decreases the COD loading to activated sludge process.

Anahtar Kelimeler:

activated sludge, sludge age, primary settler

Effects of Primary Settler on Activated Sludge Operation

Keywords:

Activated sludge, sludge age, primary settler,

PDF

___

Charpentier, J., Martin, G., 1996. New approach to oxygen requirement for low-load activated sludge. Water Res. 30, 2347–2356.
Eddy, M.&, Burton, F.L., Stensel, H.D., Tchobanoglous, G., 2003. Wastewater engineering: treatment and reuse. McGraw Hill.
Groves, K.P., Daigger, G.T., Simpkin, T.J., Redmon, D.T., Ewing, L., 1992. Evaluation of oxygen transfer efficiency and alpha-factor on a variety of diffused aeration systems. Water Environ. Res. 691–698.
Gujer, W., 1980. The effect of particulate organic material on activated sludge yield and oxygen requirement. Prog. Water Technol. 12.
Henze, M., Harremoes, P., la Cour Jansen, J., Arvin, E., 2001. Wastewater treatment: biological and chemical processes. Springer Science & Business Media.
Horan, N.J., 1989. Biological wastewater treatment systems: theory and operation. John Wiley & Sons Ltd.