Pure Water Electrical Design

The City of San Diego has initiated a Pure Water project that will use proven water purification technology to clean recycled water to produce safe, high-quality drinking water. The Program offers a cost-effective investment for San Diego’s water needs and will provide a reliable, sustainable water supply. WHB Engineers’ operating company, Brady, was tasked with creating the electrical design for the new 34 MGD Pure Water Plant in San Diego, CA.

The plant utilizes Ozone, BAC filtration, Ultra filtration, Reverse Osmosis, UV and CO2 systems. The power requirements were 12kV 15MVA Main Electrical Building, medium voltage 1000HP pumps at the pump station, and multiple process systems. The DCS system is networked to the North City plant that also feeds the raw water to the new plant. Smart MCCs and ARC resistant switchgear were incorporated into the design. Multiple valve networks and analyzer networks were part of the design along with a fully
integrated security system.

Provisions for a future renewable energy generation feeders to the plant from the existing wastewater plant was critical. CAISO metering, SDGE metering, and redundant multi-function relays were incorporated.