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Milwaukee - Resource Recovery - Sustainable Water Reclamation (SeWeR)


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Milwaukee - Resource Recovery - Sustainable Water Reclamation (SeWeR)

  1. 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. 2. Words Matter A vocabulary of truth andsimplicity will be of service throughout your life. -Winston Churchill
  3. 3. Our Talk Today•MMSD Background•Visions for the Future•Energy at MMSD•Resource Recovery at MMSD
  4. 4. • Regional Agency • Established by State Law• Provide water reclamation and flood management
  5. 5. MMSD SewersMunicipally Owned Sewers Private Laterals
  6. 6. Water Pollution Abatement Program (WPAP) • Treatment Plant Upgrades • ISS (a.k.a. Deep Tunnel) • Sewer RehabilitationA $3 billion investment
  7. 7. Below GroundGallons of Storage Long In Diameter
  8. 8. The Deep Tunnel has kept91 Billion Gallons of pollution out of Lake Michigan
  9. 9. A Path to the Future
  10. 10. MMSD 2035 Vision’s Strategic Objectives1. Integrated Watershed Management a) Zero CSOs and SSOs b) Integrated management of urban and rural stormwater2. Climate Change Mitigation/Adaptation with an emphasis on Energy Efficiency a) Use 100% renewable energy sources, with 80% being self-produced b) Reduce MMSDs carbon footprint by 90% from its 2005 baseline
  11. 11. 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
  12. 12. Energy at MMSD• Purchased Energy• Produced Energy  From Effluent  Other On Site
  13. 13. 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
  14. 14. Produced Energy• From Treatment Process  Waste Heat  Biogas• Onsite  Solar PV  More Solar + Wind on the Horizon…
  15. 15. Produced Energy From Effluent ProcessWaste Heat: JI Turbines:Natural Gas to ElectricityBiogas: SS Digesters + EngineGenerators: Biogas to Electricity +Heat
  16. 16. Waste Heat• Turbines are source of waste heat• Saves on purchase and use of natural gas in solids drying• Generates electricity instead of purchase
  17. 17. 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
  18. 18. 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
  19. 19. 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
  20. 20. Produced Energy•From Effluent Process •Waste Heat •Biogas (now & future)•Onsite •Solar PV •More Solar + Wind on the Horizon…
  21. 21. Solar PV•20 kw: Rooftop of D&D Building•Produced 93,324 kWhWebsite:
  22. 22. 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 GapMinimize 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
  23. 23. Nutrient Recovery at MMSD• Milorganite• Future  Trading  Other?
  24. 24. 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
  25. 25. 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 toGuarantee Safety and Nutrient Analysis
  26. 26. 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
  27. 27. Paradigm Change Industry-Wide • Words  Stop Saying “Waste”  Start Saying “Resource” • Goals  Energy Independence  Resource Recovery
  28. 28. How We Talk About This Matters!!!!!
  29. 29. Questions?
  30. 30. Extra slides below…insert themwherever (and if) they make sense.END HERE!!!!!
  31. 31. LFG Project RolesMMSD: • 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 moreVES: • Design, construct, own and operate LFG treatment and compression system
  32. 32. LFG Pipeline• 16” Diameter• 19 Miles Long  5.6 Miles Convert Steel Pipe  13.3 Miles New HDPE• <100 psi• Total Cost: ~$43M
  33. 33. 2009 Green Energy Methane Gas Solar Power $800,000
  34. 34. Landfill Gas -to- Green Power Greenhouse Gas Reduction 500,000 Tons Customer Savings $10’s of Millions
  35. 35. Existing JI Combined Heat and Power Process Excess waste heat Natural Gas (when not using turbines Waste heat to Milorganite dryersWE Electricity, dryweather,weekends 2-15 MW Natural Electricity for Gas Turbines and Plant Needs Generators (wet weather, Natural Gas 24 hours/day, 5 days/week
  36. 36. 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
  37. 37. LFG Supply2,500,0002,000,000 5 Turbines1,500,000 3 Turbines1,000,000 500,000 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
  38. 38. Jones Island Stationary Combustion SourcesBefore and After Landfill Gas Project (based on 2007 fuel usage data) GHG Emissions in Metric Tons of Equivalent CO2 ~95% Reduction
  39. 39. 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
  40. 40. Combined Heat and Power Process with Landfill Gas Excess waste heat Natural Gas Waste heat to Milorganite dryersPurchaseelectricity if notenough LFG 3-5 4.8 MW gas turbines Electricity for Plant Landfill Needs, Gas Natural Gas
  41. 41. Template slide•Stuff•Stuff•Stuff