Minimization of Short-Circuiting Flow through Upflow Anaerobic Sludge Blanket Reactor
Publication: Journal of Environmental Engineering
Volume 130, Issue 9
Abstract
Performance data of upflow anaerobic sludge blanket (UASB) reactors treating different types of wastewater have been analyzed. A completely stirred tank reactor (CSTR) model with bypass flow was considered for evaluation of the behavior of sludge bed as well as the whole reactor. It demonstrated that the sludge bed in a UASB reactor behaves as a completely stirred tank reactor with bypass flow. The reactor performance has been shown to depend on the short-circuiting flow through the sludge bed. However, the short-circuiting flow depends on design and operational conditions of the reactor. To find out the relationships of various parameters with short-circuiting flow through the sludge bed, dimensional analysis was carried out. Principal component analysis was carried out by taking short-circuiting flow, concentration of the influent, superficial gas velocity, height of the sludge bed, concentration of the biomass in the sludge bed, and flow rate of the influent into consideration. Analysis reveals the relative importance of the parameters on the short-circuiting flow.
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References
Barbosa, R. A., and Sant’Anna, Jr., G. L.(1989). “Treatment of raw domestic sewage in a reactor.” Water Res., 23(12), 1483–1490.
Behling, A., Colina, G., Herra, M., Gutierrez, C. E., Fernandez, N., and Forster, C. F.(1997). “Domestic wastewater treatment using a UASB reactor.” Bioresour. Technol., 61, 239–245.
Bolle, W. L., Breugel, V. J., Eybergen, G. C., Kossen, N. W. F., and Gis, W. V.(1986a). “Kinetics of anaerobic purification of industrial wastewater.” Biotechnol. Bioeng., 28, 542–548.
Bolle, W. L., Breugel, V. J., Eybergen, G. C., Kossen, N. W. F., and Gis, W. V.(1986c). “An integral dynamic model for the UASB reactor.” Biotechnol. Bioeng., 28, 1621–1636.
Bolle, W. L., Breugel, V. J., Eybergen, G. C., Kossen, N. W. F., and Zoetemeyer, R. J.(1986b). “Modelling the liquid flow in upflow anaerobic sludge blanket reactors.” Biotechnol. Bioeng., 28, 1615–1620.
Fang, H. H. P., and Chui, H. K.(1993). “Maximum COD loading capacity in UASB reactor at 37°C.” J. Environ. Eng., 119(1), 103–119.
Fang, H. H. P., Guohua, L., Jinfu, Z., Bute, C., and Guowe, G.(1990). “Treatment of brewery effluent by UASB process.” J. Environ. Eng., 116(3), 454–460.
Fang, H. H. P., Li, Y. Y., and Chui, H. K.(1995). “UASB treatment of wastewater with concentrated mixed VFA.” J. Environ. Eng., 121(2), 153–160.
Gnanadipathy, A., and Polprasert, C.(1993). “Treatment of a domestic waste with UASB reactors.” Water Sci. Technol., 27(1), 195–203.
Hwang, S. H., Hansen, C. L., and Stevens, D. K.(1992). “Biokinetics of an upflow anaerobic sludge blanket reactor treating whey permeate.” Bioresour. Technol., 41, 223–230.
Johnson, R. A. (1999). Miller and Freund’s probability and statistics for engineers, Prentice–Hall of India Private Limited, 303–305.
Khan, N. A., and Mehrotra, I.(1990). “Performance of Laboratory-scale Upflow anaerobic sludge blanket (UASB) reactors.” Water Sci. Technol., 22(7/8), 285–286.
Krzanowski, W. J. (1988). Principles of multivariate analysis—a users perspective, Clarendon, Oxford, U.K., 53–83.
Kwong, T. S., and Fang, H. H. P.(1996). “Anaerobic degradation of cornstarch in wastewater in two upflow reactors.” J. Environ. Eng., 122(1), 9–17.
Manjunath, D. L. (1987). “Treatment of sugar industry waste using upflow anaerobic sludge blanket (UASB) reactor.” PhD thesis, Univ. of Roorkee, Roorkee, India.
Metcalf and Eddy. (1995). Wastewater engineering, Tata McGraw-Hill Limited, New Delhi, 357–443, 1275–1279.
Narnoli, S. K., and Mehrotra, I.(1997). “Sludge blanket of UASB reactor: Mathematical simulation.” Water Res., 31(4), 715–726.
Pavlostathis, S. G., and Gomez, G. E.(1991). “Kinetics of anaerobic treatment.” Water Sci. Technol., 24(8), 35–59.
Singh, R. P. (1998). “Modelling of the UASB reactor.” PhD thesis, Univ. of Roorkee, Roorkee, India.
Singhal, A., Gomes, J., Praveen, V. V., and Ramachandran, K. B. (1998). “Axial dispersion model for upflow anaerobic sludge blanket reactors.” Biotechnol. Prog., (14), 645–698.
Van der Meer, R. R. (1979). Anaeobic treatment of wastewater containing fatty acids in upflow reactors, Delft University Press, Delft, The Netherlands.
Van Haandel, A. C., and Lettinga, G. (1994). Anaerobic sewage treatment—a practical guide for regions with a hot climate, Wiley, Chichester, U.K., 103.
Wu, M. M., and Hickey, R. F.(1997). “Dynamic model for UASB reactor including reactor hydraulics, reaction, and diffusion.” J. Environ. Eng., 123(3), 244–252.
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Published In
Journal of Environmental Engineering
Volume 130 • Issue 9 • September 2004
Pages: 951 - 959
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Jul 30, 2001
Accepted: Jun 10, 2003
Published online: Aug 16, 2004
Published in print: Sep 2004
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