Project Type

Regional Recycled Water Advanced Purification Center Demonstration Project


Metropolitan Water District of Southern California (MWD) and the Sanitation Districts of Losa Angeles County (LACSD)


Carson, CA

Current Status

Ongoing since 2019

Key Features

  • DDW Permitting and regulatory approach
  • Advanced water treatment
  • Pilot demonstration testing
  • Membrane bioreactor operation and testing
  • Membrane bioreactor pathogen crediting
  • Process optimization
  • Operations

Project Overview

The Metropolitan Water District of Southern California (MWD) and the Sanitation Districts of Los Angeles County (LACSD) are developing the design of a 150 million gallon per day (mgd) AWPF at the Joint Water Pollution Control Plant (JWPCP). The Advanced Purification Center demonstration plant is a 0.5 mgd plant which includes tertiary membrane bioreactors, reverse osmosis (RO), and ultraviolet light with advanced oxidation (UV/AOP). The Trussell team is responsible for the initial operation of the plant and development and execution of a yearlong test plan which includes numerous chemical constituents and pathogen crediting through the MBR system.

MBR crediting has not yet been established in California, and so Trussell has worked alongside regulators to develop a thorough test plan for evaluating pathogen reduction through the MBR. The Trussell team has been conducting the microbial testing efforts at APC, which includes quantifying drinking water pathogens and a suite of indicator organisms throughout the MBR treatment process. Trussell is supporting the sampling effort, onsite filtration and elution procedures, and coordination with the LACSD and MWD laboratories.

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