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Water Science & Technology Vol 49 No 5-6 pp 309 - 314 © IWA Publishing 2004 Enhanced nitrogen removal using C/N load adjustment and real-time control strategy in sequencing batch reactors for swine wastewater treatmentM. Chen*, J.-H. Kim**, N. Kishida***, O. Nishimura**** and R. Sudo******Center for Environmental Science in Saitama, Kamitanadare 914, Kisai-machi, Saitama, 347-0115, Japan (E-mail: m-chen@kankyou.pref.saitama.jp) ABSTRACT The laboratory-scale sequencing batch reactor (SBR) was used to study the effectiveness of an integrated strategy of real time control with C/N ratio adjustment for practical swine wastewater treatment. Swine waste was used as the external carbon source for continuous treatment in the SBR reactors. Oxidation-reduction potential and pH were used as parameters to control the continuous denitrification and nitrification process, respectively. A constant effluent quality could be obtained, despite drastic variations in the characteristics of influent wastewater. Also, a relatively complete removal of nutrients was always ensured, since the optimum quantity of the external carbon source could be provided for complete denitrification, and a flexible hydraulic retention time was achieved by the successful real-time control strategy. The average removal efficiencies of total organic carbon and nitrogen were over 94% and 95%, respectively. PAY-PER-VIEW: Buy this article for £23.5 (IWA MEMBER PRICE: £17.63) - All prices include VAT |
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