Diffusion into microbial aggregates

dc.contributor.authorMatson, J. V.
dc.contributor.authorCharacklis, William G.
dc.date.accessioned2017-09-27T22:19:27Z
dc.date.available2017-09-27T22:19:27Z
dc.date.issued1976
dc.description.abstractTheoretical work in the biological waste treatment field has been directed at modeling substrate removal processes in fluidized and fixed film microbial systems in terms of the basic rate processes. Much of the research has been directed at delineating the rate limiting steps to simplify the problem. Various researchers have shown that the rate limiting step can be mass transfer through the microbial aggregate to the active sites at the cells. Therefore, any mechanistic model that incorporates mass transfer must be sensitive to variations in the reactant diffusion coefficient through floc material. A direct measure of mass flux has been developed to determine the variations in the diffusion coefficients of glucose and oxygen through microbial aggregates grown under various experimental conditions. A factorial analysis indicated significant changes in the molecular diffusion coefficient with variations in sludge age and carbon-nitrogen ratio in the growth media. Oxygen diffusivity varied from 20 to 100% of its value in water, glucose from 30 to 50%. A simple zero order diffusion-reaction kinetic model for spherical floc was constructed. It indicated that oxygen diffusion limitations are possible in the high rate activated sludge processes with large floc particles.en_US
dc.identifier.citationMatson, J.V. and W.G. Characklis, "Diffusion into Microbial Aggregates," Water Research, 10(10):877-885 (1976). doi: 10.1016/0043-1354(76)90022-1en_US
dc.identifier.issn0043-1354
dc.identifier.urihttps://scholarworks.montana.edu/handle/1/13770
dc.titleDiffusion into microbial aggregatesen_US
dc.typeArticleen_US
mus.citation.extentfirstpage877en_US
mus.citation.extentlastpage885en_US
mus.citation.issue10en_US
mus.citation.journaltitleWater Researchen_US
mus.citation.volume10en_US
mus.data.thumbpage4en_US
mus.identifier.categoryEngineering & Computer Scienceen_US
mus.identifier.doi10.1016/0043-1354(76)90022-1en_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentCenter for Biofilm Engineering.en_US
mus.relation.departmentChemical & Biological Engineering.en_US
mus.relation.departmentChemical Engineering.en_US
mus.relation.researchgroupCenter for Biofilm Engineering.en_US
mus.relation.universityMontana State University - Bozemanen_US

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