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Removal of Nitrogen and Phosphorus by Activated Sludge Process Combined with Aluminum Corrosion  

Choi Hyung Il (Division of Environmental Engineering, Chosun University)
Cheong Kyung Hoon (Division of Environmental Engineering, Chosun University)
Park Sang Il (Division of Environmental Engineering, Chosun University)
Paik Ke Jin (Public Health and Environmental Institute of Gwangju City)
Publication Information
Journal of Environmental Health Sciences / v.31, no.2, 2005 , pp. 172-178 More about this Journal
Abstract
A laboratory experiment was performed to investigate simultaneous removal of phosphorus and nitrogen from raw sewage by intermittently aerated activated sludge process packed with aluminum and silver plate. Two continuous experimental process, i.e. an intermittently aerated activated sludge process, and an intermittently aerated activated sludge process with an aluminum and silver plate packed into the reactor were compared. The pitting corrosion of aluminum does not affect the performance of the biological treatment. The amounts of Al eluted from aluminum plate 17 mg to 60.6 mg in this experimental conditions, and Al/P mole ratio were from 3.31 to 11.25. The total nitrogen removal efficiency in Run E were $60.6\%$ at the HRT of 12 hours. The effluent $PO_4-P$ concentration as low as $1.0\;mg/\iota$ could have been obtained during the continuous experiment in Run E at HRT of 12 hours.
Keywords
phosphorus; nitrogen; aluminum corrosion; intermittently aerated activated sludge; Al/P mole ratio;
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