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Oxidation ditch systems are well suited to achieving biological nutrient removal with minimal chemical addition due to the high internal recirculation rates typically maintained in the systems along with long sludge ages and hydraulic retention times. Two new oxidation ditch systems
in the mid-Atlantic region that were specifically designed to achieve limit-oftechnology biological nutrient removal were evaluated with respect to process performance following startup and initial operation. Both systems were of similar design capacity and were operated under similar influent
flows and loads. The primary difference between the systems was reactor configuration: the first used a ‘racetrack’ flow configuration with vertical shaft surface aerators, while the second used a concentric ring configuration with horizontal shaft surface aerators. The results
are presented in this paper.
Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.