2012 Spotlight City: Denver, CO

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The Denver Metro area is leading the way with innovative technology and resource recovery, especially nutrients. They are shifting the paradigm through resource recovery that takes the waste out of wastewater.

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2012 Spotlight City: Denver, CO

  1. 1. Urban Water Sustainability Leadership Conference October 17, 2012
  2. 2. The U.S. Water Alliance has met the standards and requirements of the Registered Continuing Education Program. Credit earned on completion of this program will be reported to RCEP at RCEP.net. A certificate of completion will be issued to each participant. As such, it does not include content that may be deemed or construed to be an approval or endorsement by RCEP.2
  3. 3. PurposeTo promote the national dialogue on resource recovery andgreen infrastructure Conference Learning Objectives At the end of this presentation you will be able to:• Define the range of benefits of green infrastructure practices• Identify barriers and costs to implementation of these practices• Evaluate options and opportunities for funding, financing, and valuing green infrastructure• Develop practical actions that government, communities, and others can implement to promote adoption of green infrastructure solutions
  4. 4. Agenda • Who We Are “To provide wastewater transmission • What We Do and treatment services to member municipalities and special connectors  Reclaim water in compliance with federal, state, and • How We Do It county laws in the most efficient and cost-effective means possible.”  Innovations approach  Advance best practices  Communicate Obligation to reclaim/clean water Obligation to do it cost-effectively and collaborate4
  5. 5. Who We Are Metro District • 50-year old Northern Treatment Plant single-purpose special district • 59 Connectors Robert W. Hite Treatment  22 Member Facility Municipalities • 36-Director appointed Board • 359 full-time staff • 1.7 million people in Metro District service area map 715 square miles with Connectors indicated in color5
  6. 6. What We Do Reclaim Water & Return It to the Water Cycle South Platte River Classifications • Agriculture • Aquatic life • Drinking water supply • Recreation6 South Platte River Basin
  7. 7. Reclaimed Means Very Clean – Effluent-Dominated Waters • Hite Facility effluent = 85% of South Platte River flow for 9 months of the year • “Headwaters” for downstream water supplies (recycled water; source water)7 Hite Facility outfall
  8. 8. How We Do It Metro District Facilities Transmission System Robert W. Hite Treatment Facility8 New Northern Treatment Plant METROGRO Farm
  9. 9. Facilities Transmission System • 230 miles • 43 interceptors  4-inch to 90-inch diameter  Oldest from 1890 • 4 lift stations and force mains • 3,900 manholes Brantner Gulch Lift Station in Thornton • 97 metering facilities • Sanitary sewer – Not a combined sewer (no storm water)9
  10. 10. Facilities Robert W. Hite Treatment Facility • 130 million 8 Effluent Discharge to South Platte River 6 Disinfection Facilities gallons/day 7 Dechlorination Building • 76 dry tons/day N biosolids • 314-acre site • Activated sludge process • Secured facility • 24/7/365 operation South Platte River York Street Hite Facility processes 3 Primary Clarifiers 1 Bar Screen Building 4 Aeration Basins 2 Grit Basins 5 Secondary Clarifiers 4 Solids Processing10
  11. 11. Facilities METROGRO Farm • Acquired 1993–1995 • 52,000 acres • 70 miles east of Denver • 100% of Class B biosolids beneficially reused  Registered fertilizer and soil amendment – METROGRO®  +195 private farms in 5 counties  +Private composter (~7%) • In-House Resources  ~18 truckloads/day/6 days/week  140-mile round trip average  Vehicle maintenance11 METROGRO Farm
  12. 12. Facilities New Northern Treatment Plant • North of Denver, on South Platte River • 90-acre site • Phase 1 construction 2012–2015  300,000 residents served in 5 cities  24 million gallons/day • 7 miles of pipe • $466 million capital cost estimate Rendering of Phase 1 (2015)12 and Buildout (after 2045)
  13. 13. Approach Why Innovate? 1970s family Regulatory Modern Family • Cost incentives South Platte River13 • Because we have the ability
  14. 14. Advance Water Quality Science Approach In Policymaking • South Platte Water Quality Model  Since 1981 – Segment 15  Accepted basis for discharge permit limitations  1992, 2003, 2008 Hite Facility Discharge Permits  1997 dissolved oxygen standard  2012 Nutrient Rulemaking Hite Facility outfall  2013 Discharge Permit  Nutrients  Temperature • Barr Lake-Milton Reservoir Total Maximum Daily Load  Identified non-point phosphorus sources  Support appropriate waste load allocation for14 District Barr Lake
  15. 15. Improve Water Quality and Approach Aquatic Life Habitat Constructed backwater pool Additional studies MOU Assessment Memorandum of Amendment 1 presented toNitrification Understanding • Study other regulatorsAlternatives with regulators aquaticStudy • Site-specific Aquatic • 6 phases over life/habitat 20 years• Instream standards improvements Life/Habitat reaeration • Two habitat rather than Assessment MOU Phase 1 Phase 2 structures improvements build the two initiated Amendment 2 completed completed 1990 1997 2004 2005 2006 2009 201215
  16. 16. Approach Biosolids Management History • Heat Drying/Incineration • Lime Stabilization/Landfill • Dedicated Land Disposal • Composting • Land Application  Regulation  Technology  Implementation16
  17. 17. Approach Biosolids Management Program Class B Land Application Land apply 93% of annual production METROGRO Farm Private farms 6 days/week Approx 18 truckloads/day 140 mile round-trip average >300 active sites (320 acres in size) Nutrient loading-based17
  18. 18. Groundwater Protection Approach USGS Monitoring Program • June 1997 Elbert County biosolids ban • 1998 Intergovernmental Agreement (IGA)  6-year Independent Monitoring Program with U.S. Geological Survey (USGS) • 2004 IGA  7-year Independent Monitoring Program with USGS • 2012 IGA Informational board  11-year, Monitoring Program  No USGS requirement  USGS proposal selected18
  19. 19. Approach Technology and Innovation • Bio-P pilot  Uses existing tanks/facilities  Water Environment Research Foundation involvement  Downstream monitoring indicates success • Deammonification evaluation  Taking advantage of two organisms that work well together  Fits well with existing infrastructure and future direction  Significant efficiency opportunity19  Technology is new in United States
  20. 20. Approach Innovation Approach Demand Side Institutional Capacity Technology Production Aeration basin Supply Side20 Diffusers
  21. 21. Approach Technology Innovation Picture of Endress- Hauser Monitor Instrumentation Process modeling Aeration control21
  22. 22. Participation in Research and Approach Innovation • Local – District initiatives • Local – Universities • National (Water Environment Research Foundation)  Knowledge areas  Research program management  Research project support: Aquatic life monitoring  Waterborne Pathogens and Human Health Program  Trace Organic Compound Indicator Removal During Conventional Wastewater Treatment  Linking Receiving Water Impacts to Sources and to Water Quality Management Decisions: Using Nutrients as an Initial Case Study  Nutrient Recovery in the Global Water Industry  Energy Balance and Reduction Opportunities, Case Studies of Energy- Neutral Wastewater Facilities and Triple Bottom Line (TBL) Research Planning Support22  Demonstration of Membrane Zero Liquid Discharge
  23. 23. ‹#›
  24. 24. Best Practices Cost-Effective Operations • Preventive maintenance • Performance-based operations  Performance metrics tracking on chemicals  Units in service based on treatment capacity needs  Aeration energy reduction strategies Manhole inspection  Predictive operations using process models • Capacity firming  Assure treatment capability24 Microthrix Parvicella
  25. 25. Best Practices Sustainable Practices • Beneficial reuse of biosolids • Reuse of methane gas for heat and electricity on Hite Facility • Energy Optimization Program • Green fleet, other practices • Sustainability Return on Investment tool25
  26. 26. Communication Communicate and Collaborate • Local Workgroups  Barr Lake and Milton Reservoir Watershed Association  Colorado Water Quality Forum Workgroups • National Committees  NACWA Money Matters Task Force Milton Reservoir algae  Congressional testimony and stakeholders • District Manager on Boards of Directors:  US Water Alliance  Vice-Chair – Water Environment Research Foundation  Chair – National Biosolids Partnership Steering Committee26
  27. 27. Communication Outreach • Website, education, tours, news media • Northern Treatment Plant Visitor’s Center • Citizens’ Participation Group/Farm communities • University programs  Maymester at University of Colorado • Presentations27
  28. 28. This concludes the educational content of this activity. Questions Steve Rogowski Metro Wastewater Reclamation District28 srogowski@mwrd.dst.co.us

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