سال انتشار: ۱۳۸۶

محل انتشار: پنجمین کنگره بین المللی مهندسی شیمی

تعداد صفحات: ۸

نویسنده(ها):

Ghasem Najafpour – Biochemical Engineering and Biotechnology, Faculty of Chemical Eng., Noshirvani University of Technology, Babol, Iran
Bahar Hosseini – Environmental Engineering, Faculty of Civil Eng., Noshirvani University of Technology, Babol, Iran
Maedeh Sadeghpoor – Environmental Engineering, Faculty of Civil Eng., Noshirvani University of Technology, Babol, Iran
Mohammad Norouzi – University of Peyame-Nour, Sari, Iran

چکیده:

Amol’s industrial wastewater treatment plant was evaluated over a period of eight months (July 2005 and February 2006). The operating conditions were optimized for a period of one month, to obtain a suitable efficiency. The major problems associated with the treatment plant were chemical shock (high acidic influent), bulking and rising of sludge, low F/M andMLSS/ MLVSS ratios, inadequate mixing in equalization tank, inappropriate C/N/P ratio in the anaerobic and aerobic tanks. Based on diagnostic condition, fresh manure was added to the anaerobic digestion tank for the revival of anaerobic microbial consortium and then a 15% increase in removal efficiency was obtained in the anaerobic tank. Addition of urea and phosphate into the aerobic tank improved total removal efficiency of only 5%. The effluent COD concentration was decreased by 50%. Activated sludge and the sludge volume indices were improved by 15 and 27%, respectively.