Oxygen Transfer Efficiency in Small Diffusers
Publication: Journal of Environmental Engineering
Volume 122, Issue 1
Abstract
Small on-site aerobic package plants are one alternative being explored to address situations in which septic-tank and leach-field systems are not appropriate or feasible. Such small aerobic systems use either mechanical-aeration or forced-air diffusers. However, the only information available in the literature on designing the aeration systems pertains to large-scale facilities. Oxygen-transfer characteristics of diffusers in shallow systems should be significantly different from those reported in the literature for deeper systems. This paper reports on a laboratory study conducted at the Environmental Technology Laboratory at the University of Alaska, Fairbanks, analyzing the oxygen-transfer characteristics of small diffusers. Data show that diffusers typically used in small on-site aerated wastewater-treatment systems provide lower overall oxygen transfer on a mass basis, but actually transfer oxygen at a faster rate than diffusers in deep tanks reported in the literature. The present research provides basic data of importance for the design of small wastewater-treatment systems using diffusers.
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References
1.
“A Standard for the Measurement of Oxygen Transfer in Clean Water.” (1984). ASCE, New York, N.Y.
2.
Boyle, W. C., and Redmon, D. T.(1983). “Biological fouling of fine bubble diffusers: state-of-art.”J. Envir. Engrg., ASCE, 109(5), 991–1005.
3.
Miller, J. C. (1975). “Nitrate contamination of the water table aquifer by septic tank systems in the coastal plain of Delaware.”Water Pollution Control in Low Density Areas—Proc. of a Rural Envir. Engrg. Conf., W. J. Jewell and R. Swan, eds., University Press of New England, Hanover, N.H., 121–133.
4.
Piluk, R. J., and Hao, O. J.(1989). “Evaluation of on-site waste disposal system for nitrogen reduction.”J. Envir. Engrg., ASCE, 115(4), 725–740.
5.
Stephens, T., and Tumeo, M. A.(1993). “Pulsation errors in compressible flow measurement.”J. Envir. Engrg., 119(2), 384–389.
6.
Tchobanoglous, G., and Burton, F., eds. (1991). Wastewater engineering: treatment, disposal, and reuse, 3rd Ed., McGraw-Hill, Inc., New York, N.Y.
7.
Individual Sewage Treatment Systems Technical Review Committee. (1990). “Technical Review Committee Report: Individual Sewage Treatment Systems.” Olmstead County, Minn.
8.
Tumeo, M. A. (1991). “Report on the performance of AlasCan Greywater treatment systems under warm weather conditions.”ETL Rep. No. 90.05, Envir. Technol. Lab., Univ. of Alaska, Fairbanks, Alaska.
9.
U.S. Environmental Protection Agency. (1989). “Design Manual: fine pore aeration systems.”Rep. No. EPA/625/1-89/023, Washington, D.C.
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Copyright © 1996 American Society of Civil Engineers.
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Published online: Jan 1, 1996
Published in print: Jan 1996
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