River and Laboratory BOD Rate Considerations

by John J. Gannon,

Serial Information: Journal of the Sanitary Engineering Division, 1966, Vol. 92, Issue 1, Pg. 135-162

Document Type: Journal Paper


Differences observed between the laboratory bottle BOD rate, k1, and the river BOD rate, kr, motivated an investigation of river BOD conditions to develop a better understanding of the deoxygenation component of the river oxygen balance relationship, limiting consideration, however, to the effect of the BOD rate. Two river situations in Michigan, one a domestic waste problem on the Clinton River below the Pontiac, Mich., waste treatment plant, the other an industrial problem on the Tittabawassee River below the Dow Chemical Co. at Midland, were studied. To define the river BOD removal rate, kr, under low flow warm weather conditions, and to relate the removal to the resulting oxygen conditions, special 48-hr around-the-clock intensive surveys were conducted on each river. For the Clinton River survey data, the resulting kr = 1.1, while for the Tittabawassee River survey data, kr = 0.2. It is concluded that the high river kr on the Clinton River is the result of a combination of an accelerated oxidation rate in the river over the conventional laboratory bottle approach together with bilological extraction and accumulation, while the high river kr on the Tittabawassee River is caused only by an accelerated river oxidation over the laboratory bottle approach.

Subject Headings: High-rise buildings | Waste treatment plants | Oxidation | Chemical wastes | Geomatic surveys | Rivers and streams | Oxygen | Domestic wastes | Michigan | United States

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