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Biosolids Digester Facilities Project

Project Materials
Fact Sheet English
 • Fact Sheet Spanish
 • Fact Sheet Chinese
 • 3/2018 Presentation
 • 7/2018 Presentation
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Current Project Timeline
March 2018 - SFPUC Commission Approval
July 2018 - WIFIA Loan Approval
August 2019 - Anticipated Notice to Proceed for Construction

Summer 2019 – Estimated 100% Design Complete
Fall 2019 - Estimated Start of Construction
Summer 2025- Estimated End of Construction
Summer 2026- Facility Start-Up
BDFP Render from Jerrold
Rendering of Digester Facilities from Jerrold Avenue looking West

Built in 1952, the Southeast Treatment Plant (SEP) is located in the Bayview-Hunters Point community and treats 80% of the City's wastewater. After several years of planning and engagement with the community, the Sewer System Improvement program (SSIP) has been developed to address the long-standing issues of odors and seismic vulnerability, as well as other operational challenges related to the aging solids handling facilities at the SEP.

On March 13, 2018, the SFPUC Commission approved the Biosolids Digester Facilities Project (BDFP) which will replace and relocate the outdated existing solids treatment facilities with more reliable, efficient, and modern technologies and facilities that will help transform the plant into a modern resource recovery facility, a City destination, a proud neighborhood asset, and an attractive workplace. In addition, the project will locate the new digesters farther away from existing residences, reduce odors, make visual improvements in and around the plant, and allow us to meet our Levels of Service goals. 

For more information about construction activities at the Southeast Treatment Plant, visit

BDFP New Digesters
BDFP Pretreatment Facility
BDFP Recovery Building
New digesters Pretreatment facility Energy recovery building

Project Objectives

  • Address aging infrastructure – construct new modern, proven and efficient treatment technologies
  • Improve odor, noise, and visual quality
  • Improve seismic reliability
  • Beneficially use 100% of biosolids and biogas produced
  • Maintain regulatory compliance
  • Build critical processes with redundant infrastructure to provide reliability and operational flexibility
Learn more about how the Southeast Treatment Plant operates 24/7 to keep our community and environment clean! Get involved and help us protect our sewer system!
• Our wastewater treatment plant tours are currently on hold due to extensive construction underway. For now, we hope you will view some of our exciting videos to learn more about our amazing sewer system at
• Learn ways to keep our city clean and green


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Click on the image to hear project managers talk about upgrades.

About the SSIP

The San Francisco Public Utilities Commission (SFPUC) recently launched the Sewer System Improvement Program (SSIP), a 20-year citywide investment to upgrade our aging sewer system and provide a more reliable, sustainable, and seismically safe system now and for future generations. The SSIP includes a series of facility upgrades at the Southeast Treatment Plant (SEP) located in the Bayview neighborhood of San Francisco. Click here to learn more about the SSIP or for information on upcoming meetings, visit




Last updated: 1/7/2020 2:13:03 PM