The Performance Of A Selector To Solve Bulkmg Sludge Problem In
An Activated Sludge Process
Author(s)
A. Mohseni-Bandpi & Z. Yousefi
Abstract
The performance of selector to solving bulking
sludge problem in activated sludge process
A. Mohseni-Bandpi & Z. Yousefi
Department of Environmental Health Engineering, Health Faculty, Sari,
Iran.
Abstract
An investigation was carried out to evaluate the performance of selector in
activated sludge under extended aeration mode to control bulking sludge
problem. The first phase of this study a bench scale of extended aeration process
without a selector was run to evaluate the possible formation of bulking sludge.
The results of this part show that SVI value was 200-600 ml/g. After using
hydrochloride powder as a chemical material for controlling bulking sludge
problem, the SVI reduced to 50 to 80 ml/g. After installing a selector zone this
value was corrected to 80 to 120 ml/g. The second phase of this research, a pilot
scale extended aeration process was designed and constructed with plastic
material and a selector was installed in head of aeration unit. The characteristics
of
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