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Efficient Wastewater Flow Management in Interceptors System for Dry and Wet Weather Scenarios

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The Subregional Operating Group (SROG) is a five-city partnership formed to facilitate the joint ownership and operation of a regional wastewater conveyance and treatment system in the Phoenix metropolitan area (Greeley and Hansen, 2008). The partnership includes cities of Glendale, Mesa, Phoenix, Scottsdale, and Tempe. The regional system consists of the 91st Avenue WWTP, SRO Interceptor, the SAI Interceptor and the 99th Avenue Interceptor. SROG conducted a study (Greeley and Hansen, 2006) to evaluate conveyance capacity requirements of the interceptors to the year 2060 including RDII from a 10-Year, 24-Hour storm event. Through modeling of the system, the study identified pipe capacity limitations and recommended a regional solution consisting of flow equalization facilities to optimize the use of the interceptors. The benefits of this solution include a more efficient utilization of the interceptor system, a relatively uniform flow through the interceptors, reduction of potential odor release, a uniform flow through the secondary treatment at the 23rd Avenue WWTP, and a reduction of the peaking factor at the influent to the 91st Avenue WWTP.
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Keywords: Interceptor sewer; equalization basins; hydraulic model; infiltration inflow; peak flows; pipe capacity; regional solution

Document Type: Research Article

Publication date: 2010-01-01

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