Application of Autotrophic Denitrification to Nitrate-Contaminated Industrial Wastewater
Abstract
An autotrophic denitrification system was applied to the treatment of industrial wastewater with very low C/N ratio. The experiments were conducted by both batch suspension and continuous column runs. The denitrification behavior in suspension runs obeyed the first-order reaction with the rate constants k1and k2 of 0.014 and 0.004 m3fg-SS-d, respectively. In the continuous runs, a column was packed with a mixture of granular sulfur and limestone. The microbes mostly composed of Thiobacillus denitrificans attached on the surface of sulfur particles like biofilm with an approximate thickness of 100 1m. The denitrification rate in the packed column was expressed by a half-order equation with the rate constant of 0.172 g-Nl/2- ml/2f(kg-S d). Lower denitrification extent of industrial wastewater compared with synthetic wastewater was concluded to be caused by the lack of alkalinity.
References
Bisogni, J.J. and C.T. Driscoll, Denitrification Using Thiosulfate and Sulfide, J.Env.Eng., 1977, Vol. 103 pp 593-604.
Clauss, G. and H.J. Kutaner, Autotrophic Denitrification by Thiobacillus denitrificans in a Packed Bed Reactor, Applied Microbiology and Biotechnology, 1985, Vol. 22 pp 289-296.
Driscoll, C.T. and J.J. Bisogni, The Use of Sulfur and Sulfide in Packed Bed Reactors for Autotrophic Denitrification, J. WPCF., 1978, Vol. 50 pp 569-576.
Hano, T., H. Takonashi, M. Hirata, and S. Ohara, Nitrogen Removal from Lanfill Leachate with Autotrophic Bacteria, Proceeding of Reg. Symp. on Chem. Eng., Jakarta, 1996.
Harremous, P., The Significance of Pore Diffusion to Filter Denitrification, J. WPCF., 1976, Vol. 48 No.2 pp 377-387.
Koenig, A. and L.H. Liu, Autotrophic Denitrification of Landfill Leachate Using Elemental Sulphur, Water Science and Technology, 1996, Vol. 34 No. 5-6 pp 469-476.
Koenig, A. and L.H. Liu, Kinetic Model of Autotrophic Denitrification in Sulphur Packed Bed Reactor, Water Research, 2001, Vol. 15 No. 8 pp 1968-1978.
Matsui, S. and R. Yamamoto, A New Method of Sulphur Denitrification for Sewage Treatment by a Fluidized Bed Reactor, Wat. Sci. Tech., 1986, Vol. 18 pp 355-362.
Schippers, J.C., J.C. Krulthof, F.G. Mulder, and J.W. van Lieshout, Removal of Nitrate by Slow Sulphur/Limestone Filtration, Aqua, 1987, No. 5 pp 274-280.
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