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EVALUATION OF A TREATMENT LAGOON FOR COMBINED SEWER OVERFLOW
Citation:
Connick, D., W. Pisano, AND G. Aronson. EVALUATION OF A TREATMENT LAGOON FOR COMBINED SEWER OVERFLOW. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-81/196.
Description:
This report summarizes the results of a two year study aimed at assessing the effectiveness of a 143 MG facultative lagoon for treating combined sewer overflow and polishing secondary wastewater treatment plant effluent. The lagoon performance was evaluated for changes in the degree of aeration. This parameter has the dual function of mixing the lagoon and increasing the oxygen levels above that provided by natural reaeration. The pollutant removal performance of the lagoon was evaluated for different discharge levels/detention periods. The effects of the stormwater loadings on lagoon performance were assessed so as to determine the buffering capacity of the lagoon for treating volumes of highly polluted intermittent flow. A full scale 18 MGD application of state-of-the-art disinfection technology was utilized for bacterial reduction. Sequential applications of chlorine and chlorine dioxide were made to lagoon effluent waters for optimization of dose rates and delay times between applications.