Urban Water Sustainability Leadership Conference, 2011 Clean Water America Alliance Resource Recovery: Sustainable Water Reclamation (SeWeR) Milwaukee Metropolitan Sewerage District Tim Bate, PE, Director of Planning, Research & Sustainability Karen Sands, AICP, Manager of Sustainability
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Milwaukee - Resource Recovery - Sustainable Water Reclamation (SeWeR)
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Urban Water Sustainability Leadership Conference, 2011 Clean Water America Alliance
Resource Recovery: Sustainable Water Reclamation (SeWeR)
Milwaukee Metropolitan Sewerage District
Tim Bate, PE, Director of Planning, Research & Sustainability
Karen Sands, AICP, Manager of Sustainability
Words Matter
A vocabulary of truth and
simplicity will be of service
throughout your life.
-Winston Churchill
Our Talk Today
•MMSD Background
•Visions for the Future
•Energy at MMSD
•Resource Recovery at MMSD
• Regional Agency
• Established by State Law
• Provide water reclamation and
flood management
MMSD Sewers
Municipally Owned Sewers
Private Laterals
Water Pollution Abatement Program (WPAP)
• Treatment Plant Upgrades
• ISS (a.k.a. Deep Tunnel)
• Sewer Rehabilitation
A $3 billion investment
Below Ground
Gallons of Storage
Long
In Diameter
The Deep Tunnel has kept
91 Billion Gallons of pollution out of Lake Michigan
A Path to the Future
MMSD 2035 Vision’s Strategic Objectives
1. Integrated Watershed Management
a) Zero CSOs and SSOs
b) Integrated management of urban and rural stormwater
2. Climate Change Mitigation/Adaptation with an
emphasis on Energy Efficiency
a) Use 100% renewable energy sources, with 80% being
self-produced
b) Reduce MMSD's carbon footprint by 90% from its
2005 baseline
Current MMSD Energy Situation Summary
• Energy costs are significant to MMSD
• MMSD has significant carbon footprint
• Natural gas is most significant energy source:
• Financially
• BTUs
• Carbon footprint
• Reductions in energy use can save money
JI Natural Gas
Energy at MMSD
• Purchased Energy
• Produced Energy
From Effluent
Other On Site
Purchased Energy • Energy Budget (2011): ~$13M
• 16% of O&M budget
• By Cost: 70% gas, 30% electricity
• By BTU: 90% gas, 10% electricity
• Total BTUs purchased at WRFs is
~10,000 Wisconsin residential homes
Produced Energy
• From Treatment Process Waste Heat
Biogas
• Onsite Solar PV
More Solar + Wind on the Horizon…
Produced Energy From Effluent Process
Waste Heat: JI Turbines:
Natural Gas to Electricity
Biogas: SS Digesters + Engine
Generators: Biogas to Electricity +
Heat
Waste Heat
• Turbines are source of waste
heat
• Saves on purchase and use of
natural gas in solids drying
• Generates electricity instead of
purchase
South Shore WRF Biogas • BioGas converted to electrical power by Engine
Generators
• Air Used in Secondary Treatment
• Heat Used in Digestion Process
•Biosolids can be Transferred via 11-mile Pipeline
Future: MMSD Landfill Gas Project • VES Owns Emerald Park Landfill (EPL)