Proactive Odor Control Using Computer Modeling

by Jag Salgaonkar, CH2M Hill, Santa Ana, United States,
Alison Ratliff, CH2M Hill, Santa Ana, United States,
Alan Michiels, CH2M Hill, Santa Ana, United States,
Baron Miya, CH2M Hill, Santa Ana, United States,

Document Type: Proceeding Paper

Part of: Pipeline Infrastructure II


The City of Los Angeles (City) is currently designing the East Central Interceptor Sewer (ECIS) as a major relief sewer. The pipeline will convey wastewater flows that originate upstream of the Los Angeles-Glendale Water Reclamation Plant (LAGWRP) and deliver them to the North Outfall Relief Sewer (NORS) for transport to the Hyperion Treatment Plant (HTP). The north-south leg of the ECIS will be used for conveyance only whereas the east-west leg will be used for both conveyance and storage. To address possible odor problems in the future ECIS pipeline system, the City is taking a proactive approach to odor control. Odor problems are being addressed by estimating the amount of hydrogen sulfide that would occur during both dry weather and wet weather (storage) conditions. A mathematical model that accounts for fundamental two-phase mass transfer was developed to estimate the amount of sulfide generated in the wastewater and hydrogen sulfide released into the headspace atmosphere. Potential odor control strategies are being developed so that they can integrated into the ECIS design. This paper will present the odor prediction model that was developed and preliminary results and observations based on known wastewater and pipeline characteristics. ECIS was in the preliminary design phase at the time of this report.

Subject Headings: Computer models | Odors | Sewers | Sulfides | Mathematical models | Wastewater treatment plants | Water reclamation | Mass transfer | Los Angeles | California | United States

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