1. 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

2. Words Matter
A vocabulary of truth and
simplicity will be of service
throughout your life.
-Winston Churchill

3. Our Talk Today
•MMSD Background
•Visions for the Future
•Energy at MMSD
•Resource Recovery at MMSD

4. • Regional Agency
• Established by State Law
• Provide water reclamation and
flood management

6. MMSD Sewers
Municipally Owned Sewers
Private Laterals

8. Water Pollution Abatement Program
(WPAP)
• Treatment Plant Upgrades
• ISS (a.k.a. Deep Tunnel)
• Sewer Rehabilitation
A $3 billion investment

9. Below Ground
Gallons of Storage
Long
In Diameter

10. The Deep Tunnel has kept
91 Billion Gallons
of pollution out of Lake Michigan

12. A Path to the Future

13. 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

14. 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 JI Natural Gas
• Carbon footprint
• Reductions in energy use can save money

15. Energy at MMSD
• Purchased Energy
• Produced Energy
 From Effluent
 Other On Site

16. 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

17. Produced Energy
• From Treatment Process
 Waste Heat
 Biogas
• Onsite
 Solar PV
 More Solar + Wind on the Horizon…

18. Produced Energy From Effluent Process
Waste Heat: JI Turbines:
Natural Gas to Electricity
Biogas: SS Digesters + Engine
Generators: Biogas to Electricity +
Heat

19. Waste Heat
• Turbines are source of waste
heat
• Saves on purchase and use of
natural gas in solids drying
• Generates electricity instead of
purchase

20. 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

21. Future: MMSD Landfill Gas Project
• VES Owns Emerald Park Landfill (EPL)
in Muskego, 15 Miles from JIWRF
• Agreement: MMSD + VES
• 16” LFG Pipeline from EPL to JIWRF
• Replace existing NG turbines with
turbines capable of burning LFG
Initially 3 turbines, up to 2 more
• Save $ & Reduce Carbon Footprint
• Gas Now Flared Off
• Total Pipeline Cost ~ $43M

22. LFG Turbines
• New Turbine building
• 3-5 Solar Mercury 50, 4.8 MW
Turbine-generators
• High Efficiency, Low Emissions
• Lower Temperature Exhaust
• Need to Heat Dryers Using NG,
Along with Using Waste Heat
from Turbines
• Total Cost: $61.5M

23. Produced Energy
•From Effluent Process
•Waste Heat
•Biogas (now & future)
•Onsite
•Solar PV
•More Solar + Wind on the Horizon…

24. Solar PV
•20 kw: Rooftop of D&D Building
•Produced 93,324 kWh
Website:
http://view2.fatspaniel.net/PV2Web/merge?&view=PV/standard/Simpl
e&eid=189343

25. Maximize Use of Renewables
• Landfill Gas
• SS Digester Thickening & Mixing, Co-digestion
• Regional Biosolids/High Strength Waste
• Excess “waste” heat
• Sewer Thermal
• Solar, Wind
• Renewables Project Gap
Minimize Energy Use (Conservation/Technologies)
• Energy Management and Controls
• JI Turbines
• Hybrid Fleet Replacement
• Water Conservation (complete)
• HVAC Upgrade (complete)
• Lighting (complete)
• JI Aeration AFP, Aeration/Blowers
• SS Aeration Optimization
• Conservation Project Gap

26. Nutrient Recovery at MMSD
• Milorganite
• Future
 Trading
 Other?

27. Milorganite: A True Original
• Developed in 1926 by Dr. O.J. Noer
• Originally: Commercial Turf & Vegetable
• Milorganite has been a Mainstay in the Turf Industry
for 85+ Years
• MMSD: One of the Nation’s Oldest Recyclers

28. What is Milorganite?
• Milorganite is Derived from Dried Microbes
• Iron is Added in the Treatment Process
• Iron Becomes Organically Complexed to Microbes
• Dried at 1,200º F for Over 30 Minutes
• Daily and Weekly Laboratory Analysis to
Guarantee Safety and Nutrient Analysis

29. Benefits of Milorganite
• Non-burning
• Eco-friendly
• Safe for Kids and Pets
• 4% Iron for Deep Greening
• Slow Release Nitrogen
• Can be Used Everywhere
• Inexpensive Organic

30. Paradigm Change Industry-Wide
• Words
 Stop Saying “Waste”
 Start Saying “Resource”
• Goals
 Energy Independence
 Resource Recovery

31. How We Talk About This
Matters!!!!!

32. Questions?

33. Extra slides below…insert them
wherever (and if) they make sense.
END HERE!!!!!

34. LFG Project Roles
MMSD:
• Design, Construct, Own & Operate 16”
LFG Pipeline from EPL to JIWRF
• Replace existing NG turbine with turbines
capable of burning LFG
 Includes a major building addition
 Initially 3 turbines, up to 2 more
VES:
• Design, construct, own and operate LFG
treatment and compression system

35. LFG Pipeline
• 16” Diameter
• 19 Miles Long
 5.6 Miles Convert Steel Pipe
 13.3 Miles New HDPE
• <100 psi
• Total Cost: ~$43M

36. 2009 Green Energy
Methane
Gas Solar Power
$800,000 http://v3.mmsd.com/Sustainability.aspx

37. Landfill Gas -to- Green Power
Greenhouse Gas Reduction
500,000 Tons
Customer Savings
$10’s of Millions

38. Existing JI Combined Heat and Power
Process
Excess waste
heat
Natural Gas (when not
using turbines
Waste heat to
Milorganite dryers
WE Electricity, dry
weather,
weekends
2-15 MW Natural
Electricity for Gas Turbines and
Plant Needs Generators
(wet weather, Natural Gas
24 hours/day, 5
days/week

39. LFG Purchase Contract and
Financials
• Full start up in January 2013
• 20 year contract to purchase LFG at 48% of
NYMEX
• Net savings: “$10’s of millions”
– Actual savings dependent upon NG price and
actual quantity of LFG

40. LFG Supply
2,500,000
2,000,000 5 Turbines
1,500,000
3 Turbines
1,000,000
500,000
MMBtu
Projected Maximum
Guaranteed Minimum
0
2016
2029
2013
2014
2015
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2030
2031
2032
Year

41. Jones Island Stationary Combustion Sources
Before and After Landfill Gas Project (based on 2007 fuel usage data)
GHG Emissions in Metric Tons of Equivalent CO2
~95% Reduction

42. Other Projects With Significant $ Savings
• Jones Island Aeration
– High efficiency blowers
– Up to $600K/year savings
• South Shore Process Control
– Control blowers via ammonia and DO probes
– Up to $200K/year savings
• Digester Mixing
– Increase SS digester gas production
– Up to $800K/year savings

43. Combined Heat and Power Process
with Landfill Gas
Excess
waste heat
Natural Gas
Waste heat to
Milorganite dryers
Purchase
electricity if not
enough LFG 3-5 4.8 MW gas
turbines
Electricity for Plant Landfill
Needs, Gas
Natural Gas

44. Template slide
•Stuff
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