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A Unique Approach to Sulfide Modeling for Low Flows

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The Elsinore Valley Municipal Water District's Washington Avenue Lift Station, currently under construction, is located in a service area that is rapidly growing. Although the lift station will be designed to handle an average buildout flow of 1.17 million gallons per day (mgd), the average daily flow at inception is expected to be 0.16 mgd. The vast difference between inception and buildout flows will lead to long force main detention time with increased sulfide generation at inception.

In order to better estimate liquid-phase sulfide concentrations through a 24-hour period, a diurnal wastewater flow profile was “synthesized” and used to determine detention time of individual “volume groups” as they progressed through the force main. The detention times were then used to estimate sulfide generation in each volume group and construct a diurnal sulfide concentration profile. The information from the modeling effort was ultimately used to evaluate and select a suitable sulfide and odor control system for the lift station. Although this paper presents 2007 as the inception year, lift station construction was delayed and startup is now anticipated in September 2008.
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Document Type: Research Article

Publication date: 2008-01-01

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