Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)


Civil Engineering


As industrial management becomes increasingly aware of' the advantages of processing agricultural products near the source of supply, the rate of industrial growth in rural areas correspondingly seems to accelerate. Many rural communities have already experienced the impact of industrial expansion. The type of industry which processes agricultural products produces large quantities of polluted water and, thereby, imposes a significant load upon the wastewater treatment facilities. This increased loading alters, to some extent, the ecology within the treatment processes employed. The wastewater treatment facilities used by a high percentage of rural communities consist of stabilization ponds. Some unique problems are often associated with alteration or expansion of these ponds in order. to provide adequate treatments In many instances additional land for expansion is unavailable. Under these circumstances, the aerated lagoon might possibly provide an effective solution to expansion. . . . This study evaluated the performance of the aerated lagoons at Marshall, Minnesota, with three objectives in mind: 1. To evaluate and compare the performance of the aerated lagoons under various .operating conditions; 2. To compare performance with that anticipated from pilot plant study; 3. To formulate recommendations regarding operational procedures for the aerated lagoons. Samples were collected at the aerated lagoons for three different operating conditions, designated arbitrarily as trials. Information regarding these trials is presented in Table l. For Trial 1 the influent flow had been diverted so that one-third of the flow received treatment in the east lagoon while the remaining two-thirds was treated in the west lagoon. Samples taken at the effluent weir of each lagoon permitted independent analysis of the lagoon performance. In Trial 3, one aerator operated only from 6:00 a.m. to 10:00 p. m. to represent intermittent operation.

Library of Congress Subject Headings

Sewage lagoons
Sewage disposal plants




South Dakota State University