Evaluation of Two Aerated Lagoons

by Ross E. McKinney,
Henry H. Benjes, Jr.,

Serial Information: Journal of the Sanitary Engineering Division, 1965, Vol. 91, Issue 6, Pg. 43-58

Document Type: Journal Paper


Field studies of two aerated lagoons treating domestic sewage over a 2-yr period yielded 63% BOD reduction with 1.7 days aeration and 78% BOD reduction with 7.1 days aeration. The use of oxidation ponds after using the aerated lagoons increased the BOD reductions to 85% and 88%. It appeared that the mechanical aerator-mixers could produce complete mixing with from 1/5 to 1/4 hp per 1,000 cu ft aeration volume. The oxygen transfer relationships yielded a design basis of 1.5 lb oxygen per hp-hr at 25○C and 1 mg per 1 dissolved oxygen concentration. Bacterial cells were primarily responsible for the effluent BOD from the aerated lagoon; algae were responsible for the effluent BOD from the oxidation ponds.

Subject Headings: Oxygen transfer | Aeration | Lagoons | Field tests | Oxidation | Ponds | Dissolved oxygen | Effluents

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