The Process and Water Quality Specialists
Santa Fe Irrigation District Recycled Water Facilities Plan
Santa Fe Irrigation District (SFID) / RMC Water Environment
The Santa Fe Irrigation District (SFID) provides potable and recycled water to a portion of the City of Solana Beach as well as the Rancho Santa Fe and Fairbanks Ranch communities in northern San Diego County. As part of their Eastern Service Area Recycled Water Facilities Plan, a potential source of recycled water from three local community services districts (wastewater treatment facilities) required further evaluation for feasibility. Based on historical data obtained from the three wastewater facilities, Trussell Technologies recommended microfiltration/reverse osmosis (MF/RO) treatment for a portion of the flow, which could be blended with tertiary filtered wastewater to meet total dissolved solids (TDS) requirements desired by recycled water users. Modeling of the reverse osmosis system was performed using manufacturer’s software to determine reasonable blend scenarios and RO recoveries. Further considerations for this recommendation included recycled water quality, brine removal, overall process footprint, chemical usage, and ease of operation and maintenance. Additionally, Trussell Technologies provided a conceptual level cost estimate for the capital improvement and annual operations and maintenance for the MF/RO system to aid SFID in their alternatives analysis for sources of recycled water to pursue.