The City of Spokane, Washington is implementing tertiary membrane filtration at their Riverside Park Water Reclamation Facility, The primary objective of the tertiary membrane system is to produce effluent with a seasonal average total phosphorus concentration of less than 18 parts per billion at a maximum month average daily flow capacity of 50 million gallons per day and a 12-hour peak flow capacity of 75 mgd. To support membrane system selection, extensive side-by-side pilot testing of an immersed ultrafiltration system and a pressurized microfiltration system were performed to validate design and operating parameters, including membrane cleaning procedures. Pilot test runs included fixed-flow simulation of maximum monthly flow and variable-flow simulation of normal diurnal flow and storm flows based on real-time plant flow rates. This presentation will summarize the pilot plant configuration and present results of 16 months of pilot testing. Particular focus will be placed on describing the response of the membrane systems to non-steady-state operations caused by storm flows and/or changes to upstream operations of the primary and secondary treatment processes at the plant.
This presentation is available to AMTA Members only.
- Paul Mueller, PE / Lars H. Hendron, PE
- CH2M HILL, Inc. / City of Spokane, Washington
- AMTA/AWWA Membrane Technology Conference, Long Beach, CA
- AMTA/AWWA Membrane Technology Conference
- Membrane, Design, Pretreatment, Microfiltration, Pilot