Membrane Bioreactor vs. Extended Aeration Treatment Pilot Study

33 Pages·2013·3.77 MB·English

Membrane Bioreactor vs. Extended Aeration
Treatment Pilot Study – Effluent and
Groundwater Quality
Presenter
Leslie Dumas
September 15, 2009
Innovative Solutions for Water and the Environment
Acknowledgements
Thanks to:
Colin Moy, REA., East Bay Municipal Utility District
[EBMUD] – Project Manager
Eileen Fanelli, P.G., East Bay Municipal Utility
District/Presidio Trust – Project Manager
David W. Smith, Ph.D., Merritt Smith Consulting –
Principal Investigator
Background
• WateReuse Foundation Project WRF-04-016
• Project Title: Development of Regulatory
Protocol for Incidental Environmental Reuse of
Title 22 Recycled Water
Issued August 2005 to EBMUD with RMC Water &

Environment
EBMUD’s ‘upcountry’ wastewater systems needs:

Upgrading systems to meet evolving regulatory requirements
•
Beneficial reuse of treated effluent
•
Use of small MBR treatment systems
•
The Pardee Site
Key Challenges to Recycling in
California
• Regulatory Compliance - Resolution #68-16
Antidegradation Policy
• Cost-Benefit for Small Systems
Higher capital cost to implement MBR treatment

Little to no reduction in longer-term operating costs

Permitting costs increase overall capital costs

Study Goals
• Recognize baseline assumptions on meeting
CCR Title 22 standards for unrestricted use
• Provide a standardized process (Framework) for
evaluating recycled water projects
• Utilize established and industry-accepted tools
and practices for assessment
A Two-Part Study Approach was Used
• Develop a Framework (standardized process)
• Conduct a Pilot Test
Pilot Study Design
• Conducted over 12 month period
• Sampled and analyze influent, effluent and
groundwater quality from both existing and pilot
systems
• Apply data to Framework analysis
• Identify key operating differences between the
extended aeration and MBR treatment plants
Treatment Trains
PACT Extended Aeration Plant Schematic
Pilot MBR Plant Schematic
Conventional Plant