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oai:www.ideals.illinois.edu:2142/77330 2023-07-11 col_2142_5131 col_2142_14770 com_2142_5130 com_2142_3518 com_2142_234

Gantzer, Charles Jacobs, III 2015-05-13T15:40:33Z 2015-05-13T15:40:33Z 10000-01-01 1986 1986 Previous research has demonstrated that streambed biofilms are important in contaminant removal in shallow streams. However, the ability to predict the rate at which this removal occurs did not exist. To develop a model describing streambed biofilm activity, experiments were conducted in an 8-meter long artificial stream to assess both the short-term and long-term effects stream velocity had on COD removal rates. The rate at which streambed biofilms removed COD from gravel and cobble streambeds was more sensitive to short-term changes in water velocity than would be predicted based on changes in mass transfer alone; this was more evident with the cobble. The results suggested that the amount of surface area active in COD removal was a function of stream velocity. The sensitivity of removal rate (mass transport and active surface area effects) to short-term velocity changes was described as a function of Reynolds number based on shear velocity and streambed particle diameter; the resulting equations for the gravel and cobble streambeds were streambed-particle-size specific. Made available in DSpace on 2015-05-13T15:40:33Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 8623301.PDF: 7713728 bytes, checksum: 63d8933c08d7a9a6c01ccc8b2389bf2f (MD5) Previous issue date: 1986 Embargo set by: Seth Robbins for item 78541 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 258 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1986. http://hdl.handle.net/2142/77330 (UMI)AAI8623301 eng Engineering, Civil The Role of Streambed Biofilms in The Removal of Biodegradable Contaminants From Shallow Streams text Civil and Environmental Engineering Civil Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.