Akademik Veri Yönetim Sistemi
FRESENIUS ENVIRONMENTAL BULLETIN, cilt.23, sa.12B, ss.3314-3318, 2014 (SCI-Expanded)
The formation of bulking sludge that accumulates in the aeration tank during the activated sludge process is one of the most important concerns with regard to biological waste water treatment. One of the causes of bulking sludge is the excessive growth of filamentous bacteria in the activated sludge. This study explores the comparison of ultrasound (mechanical) and hydrogen peroxide (chemical) pre-treatments on the performances of bulking and foaming sludge. Hydrogen peroxide is used in conventional wastewater treatment plants in an efficient way at certain doses. At the same time, carefully chosen ultrasound doses can also be very efficient. Two WWTPs representing the east and the west sides of Antalya were chosen. Ultrasound and hydrogen peroxide were applied on the activated sludge at certain doses. The bulking or foaming sludge cell inactivation, deformation and floc structure were evaluated. The study experiments showed a deformation in floc structure and filament structure. Deformation in floc and filament structures was recorded in twominute ultrasound applications. Hydrogen peroxide positively affected the deformation of filament structure; however, it increased turbidity. Turbidity decreased with the ultrasound application. Ultrasound application is considered to be an appropriate application to treat the returned activated sludge in treating bulking and foaming phenomenon.