Terminal Island Advanced Oxidation Process Effluent Recirculation

Murray Company Mechanical Contractors 

Terminal Island Water Reclamation Plant, built in 1935, is located 20 miles south of downtown Los Angeles. The advanced system treats approximately 15 million gallons of wastewater every day throughout its various service areas of San Pedro, Harbor City, and Wilmington. With increased water shortages projected, population growth, and emphasis on decreasing environmental footprints, the advanced water treatment technologies assist in providing a high-quality water supply, protecting groundwater quality, and decreasing potable water demand. Civiltec Engineering is assisting this system refinement project in leading to the reuse of all effluent and ceasing discharges to the harbor to comply with National Pollutant Discharge Elimination System (NPDES) requirements.

This innovative facility takes wastewater that would have been discharged into the nearby harbor and cleans the water using advanced water purification technology. This includes microfiltration, reverse osmosis, and an advanced oxidation process (AOP). The AOP uses ultraviolet to provide disinfection for the entire Advanced Water Purification Facility (AWPF). An advantage of the AOP is the disinfection of almost all contaminants without creating more pollution. Our project will refine the control and conveyance of product water that is outside the required specification for permit compliance and returns this water for reprocessing. Allowing for automatic return and retreat function of the system which ensures that product water used in the recapture and reuse wastewater process is maintained.

To build on prior successes with collaborative delivery and reduce the overall project schedule, the City of Los Angeles chose to use fixed-price design-build deliverables. The Murray Company Mechanical Contractors and Civiltec Engineering design-build team completed the advanced water treatment facility refinement, which maintains wastewater treatment capacity to produce 12 million gallons per day of high-quality water for groundwater replenishment and reuse. The design-build team designed the seamless integration with existing treatment systems and into the existing plant footprint while minimizing impacts on operations during tie-ins and shutdowns. Murray and Civiltec, in collaboration with plant operations staff, successfully completed numerous special plant accommodations and installed the pipeline, control systems, and necessary improvements to facilitate the successful completion of this project. This project was overseen by Civiltec Project Manager C. Shem Hawes. Additional team members included Sanjay K. Verma, PE (Project Engineer), Heber Torres, PE (Electrical Engineer), Chris Duncan, PLS (Survey Manager), and Jenny Tsan (Designer).