THE DESIGN OF A HYBRID AERATION SYSTEM FOR THE GILLS CREEK WASTEWATER TREATMENT PLANT, COLUMBIA, SC
Abstract:In most wastewater treatment plants, aerating activated sludge consumes the plant's power. Thus, the efficiency of the aeration system used with the activated sludge process becomes a major factor in designing an economically operated plant. Too frequently, however, consideration is only provided for the efficiency of the aerator device while the impact that the overall design of the system has on the aeration efficiency is neglected.
In the case of aeration system being designed for the 16 mgd (60,600 m3/d) Gills Creek WWTP in Columbia, SC, the impact that the overall design had on aeration efficiency was not neglected. Substantial aeration power draw reduction was provided with a system of reactors in series, using surface mechanical aerators in the first stage reactors and fine bubble diffusers in the second. By comparison, the power draw of a conventional fine bubble aeration system originally being considered was 42% higher than the “hybrid” arrangement of surface mechanical aeration followed by fine bubble aeration.
Document Type: Research Article
Publication date: January 1, 2003
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