Conversion of secondary clarifier into an oxic bioreactor by superoxygenation
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United States of America
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Mar 10, 2020
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Mar 29, 2019
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Mar 29, 2019
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Abstract
An apparatus and method for oxygenating a flow of mixed liquor, typically from an aeration tank, to a secondary clarifier permits further biological reduction of biochemical oxygen demand (BOD) of a waste stream, such as waste water while resident in the secondary clarifier. In some embodiments, the mixed liquor may be oxygenated to levels at or above about 4 mg/L. Depending upon the user requirements and the BOD of the waste stream, all or a portion of the mixed liquor may be treated to raise the dissolved oxygen content. Various apparatus may be used for superoxygenation, including, as one example, a superoxygenation cone, such as a Speece cone.
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