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Maximizing Wet Weather Treatment Capacity of Nutrient Removal Facilities

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Through the utilization of a wet weather toolkit approach, the upgrade of nutrient removal facilities to maximize wet weather flow treatment has been achieved. Understanding key characteristics of wet weather flows, such as pollutant load, solids composition, salinity, and temperature is a key consideration. Coupled with a process optimization approach that analyzes each unit process' operation under peak flow conditions and defines an optimal wet weather operating mode for each unit process, a viable wet weather flow management plan can be developed. Review of a series of case studies shows that state of the art technologies such as computational fluid dynamic analysis of primary and secondary clarifiers, automated wet weather inventory management, and biologically active ballasted sedimentation processes were crucial in attaining the competing goals of stable nutrient removal performance and increased wet weather flow capacity. Implementation of this approach has allowed facilities ranging from 15 to 330 mgd to treat significantly higher wet weather flows at significant discounts versus conventional treatment approaches, with savings ranging from greater than 10M to over 100M for larger facilities.
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Keywords: BioActiflo; CEPT; CFD; MBR; wet weather flow treatment

Document Type: Research Article

Publication date: 2011-01-01

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