Ali Akbar Azimi
Faculty of Environment, University of Tehran, P.O. Box 14155-6135, Tehran
Seyyed Hossein Hashemi
Faculty of Environment, University of Tehran, P.O. Box 14155-6135, Tehran
Gholamreza Nabi Bidhendi
Faculty of Environment, University of Tehran, P.O. Box 14155-6135, Tehran
Rohollah Mahmoodkhani
Faculty of Environment, University of Tehran, P.O. Box 14155-6135, Tehran
ABSTRACT
In this study, the effects of aeration ratio on organic materials removal rate in sequencing batch reactors was considered. Eight hours cycles, including 6 h aeration period, were applied. Raw wastewater with COD equal 350 ± 20 mg L-1 was prepared by dried confectionary milk and tap water. SOTE equation in test condition was defined as y=1.24981ln(x) +13.86231. Aeration ratio was described as ratio of supplied dissolved oxygen to required oxygen amount. Taking into account nitrification and denitrification processes, five aeration ratios: 1.1, 3.14, 5.44, 6.97 and 8.83 are applied. Results showed aeration ratios, above stoichiometric required oxygen amount, do not have a significant effect on organic materials removal efficiency and just slope of curve of COD changes via time, changed moderately.
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How to cite this article
Ali Akbar Azimi, Seyyed Hossein Hashemi, Gholamreza Nabi Bidhendi and Rohollah Mahmoodkhani, 2005. Aeration Ratio Effect on Efficiency of Organic Materials Removal in Sequencing Batch Reactors. Pakistan Journal of Biological Sciences, 8: 20-24.
DOI: 10.3923/pjbs.2005.20.24
URL: https://scialert.net/abstract/?doi=pjbs.2005.20.24
DOI: 10.3923/pjbs.2005.20.24
URL: https://scialert.net/abstract/?doi=pjbs.2005.20.24