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Received June 2, 2007
Accepted January 17, 2008
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Nitrogen requirement for the mesophilic and thermophilic upflow anaerobic filters of a simulated papermill wastewater
Division of Environmental and Geosystem Engineering, College of Engineering, Kangwon National University, Hyoja 2-dong, Chunchon, Gangwon 200-701, Korea
johnghwa@kangwon.ac.kr
Korean Journal of Chemical Engineering, September 2008, 25(5), 1022-1025(4), 10.1007/s11814-008-0166-3
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Abstract
This study determined the minimum nitrogen concentration at which the mesophilic and thermophilic upflow anaerobic filters treating a simulated papermill wastewater could operate efficiently. For this purpose, the chemical oxygen demand (COD) to nitrogen ratio in both digesters was increased in five consecutive steps, from 94 : 5 to 363 : 5. The maximum COD to nitrogen ratios that provided satisfactory operation were 283 : 5 (30mg N/L) and 363 : 5 (23 mg N/L) for the mesophilic and thermophilic reactors, respectively. The nitrogen consumption of bacteria in the thermophilic digester was lower than that in the mesophilic digester. The operational efficiency of the thermophilic digester was higher than that of the mesophilic one regardless of the COD to nitrogen ratio.
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Madigan MT, Martinko JM, Parker J, Brock: biology of microorganisms, 10th ed., Prentice-Hall, Inc. (2003)
RINTALA JA, PUHAKKA JA, Bioresour. Technol., 47(1), 1 (1994)
Rittmann BE, McCarty PL, Environmental biotechnology: principles and applications, McGraw-Hill, Singapore (2001)
Henze M, Harremoes P, Water Sci. Technol., 15(8-9), 1 (1983)
Speece RE, Anaerobic biotechnology for industrial wastewaters, Archae Press (1996)
Ahn JH, A comparison of mesophilic and thermophilic upflow anaerobic filters, PhD thesis, University of Birmingham, UK (2001)
Chen W, Horan NJ, Environ. Technol., 19, 163 (1998)
Hall ER, Anaerobic treatment of wastewaters in suspended growth and fixed film processes, In Design of anaerobic processes for the treatment of industrial and municipal wastes, J. F. Malina and F.G. Pohland Eds., Technomic Publishing Company, Inc. (1992)
Anderson GK, Kasapgil B, Ince O, Environ. Technol., 17(5), 449 (1996)
APHA, AWWA, and WEF, Standard methods for the examination of water and wastewater, 21st ed., Washington, D.C. (2005)
Ahn JH, Forster CF, Bioresour. Technol., 73(3), 201 (2000)
Rhee GY, Gotham IJ, Limnol. Oceanogr., 26(4), 635 (1981)
