West Basin Water Recycling Plant Phase IV Design-Build Expansion

Butier Engineering served as Program Manager for the West Basin Municipal Water District's $51 million design/build project involving the expansion of its water recycling capabilities in the Barrier Water Treatment System and Title 22 Treatment System. New facilities at the West Basin Water Recycling Plant have increased the capacity of Barrier water to 12.5 MGD, and Title 22 water to 40 MGD.

The source water for these processes is secondary effluent from the City of Los Angeles Hyperion Treatment Plant. The upgrades/expansion to the Barrier Water Treatment System included cartridge filters, chemical addition, microfiltration (MF), reverse osmosis (RO), ultraviolet irradiation, and product water pump station. The expansion of the Title 22 Treatment System included conversion of an existing clarifier and existing filters, an additional product water storage tank and pump station, and modifications to the existing disinfection system. New chemical facilities include a lime saturator, hydrogen peroxide feed system, and upgrades to existing chemical systems.

The project involved upgrades to the existing solids handling system consisting of the addition of high-rate clarifiers for backwash water treatment and upgrade of the existing equalization basins and plant-and-frame presses. The electrical supply, instrumentation, and control systems were upgraded as part of the project as well.

In addition, the new facilities required yard piping and the demolition and removal of abandoned facilities. Key to the project was the contractor's sequence of work and tie-in coordination which allowed the WBWRP to continue to operate at present conditions during the Phase IV Expansion activities.