2012 spotlight city: denver, co
DESCRIPTION
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.TRANSCRIPT
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SPOTLIGHT: DENVER
Urban Water Sustainability Leadership Conference October 17, 2012
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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.
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Conference Learning ObjectivesAt 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
Purpose To promote the national dialogue on resource recovery and green infrastructure
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Agenda• Who We Are• What We Do
Reclaim water• How We Do It
Innovations approach
Advance best practices
Communicate and collaborate
“To provide wastewater transmission and treatment services to member
municipalities and special connectors in compliance with federal, state, and county laws in the most efficient and
cost-effective means possible.”
Obligation to reclaim/clean waterObligation to do it cost-effectively
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Who We AreMetro District• 50-year old
single-purpose special district
• 59 Connectors 22 Member
Municipalities• 36-Director
appointed Board• 359 full-time staff• 1.7 million people in
715 square miles
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Metro District service area map with Connectors indicated in color
Robert W. Hite
Treatment Facility
Northern Treatment Plant
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What We DoReclaim Water & Return It to the Water Cycle
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South Platte River Classifications• Agriculture• Aquatic life• Drinking
water supply• Recreation
South Platte River Basin
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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
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How We Do ItMetro District Facilities
Robert W. Hite Treatment FacilityTransmission System
New Northern Treatment Plant METROGRO Farm8
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Transmission System• 230 miles• 43 interceptors
4-inch to 90-inch diameter Oldest from 1890
• 4 lift stations and force mains• 3,900 manholes• 97 metering facilities• Sanitary sewer –
Not a combined sewer (no storm water)
Brantner Gulch Lift Station in Thornton
Facilities
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Robert W. Hite Treatment Facility• 130 million
gallons/day• 76 dry tons/day
biosolids• 314-acre site• Activated sludge
process• Secured facility• 24/7/365 operation
Facilities
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1 Bar Screen Building
2 Grit Basins
3 Primary Clarifiers
4 Aeration Basins
5 Secondary Clarifiers
6 Disinfection Facilities
7 Dechlorination Building
8 Effluent Discharge to South Platte River
York StreetYork Street
South Platte RiverSouth Platte River
I-270I-270Sand CreekSand Creek
Burlington DitchBurlington Ditch
N
4 Solids Processing
Hite Facility processes
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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 maintenance
Facilities
11 METROGRO Farm
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Rendering of Phase 1 (2015) and Buildout (after 2045)
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
Facilities
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Rendering of Phase 1 (2015)
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Why Innovate?
Growth
Regulatory
• Cost incentives• Because we have the ability
South Platte River
Modern Family
1970s family
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Approach
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Advance Water Quality ScienceIn 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 2013 Discharge Permit
Nutrients Temperature
• Barr Lake-Milton Reservoir Total Maximum Daily Load Identified non-point phosphorus sources Support appropriate waste load allocation for
District Barr Lake
Approach
Hite Facility outfall
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Improve Water Quality and Aquatic Life Habitat
Approach
MOU Amendment 1• Study other
aquatic life/habitat improvements rather than build the two
2004
Memorandum of Understanding with regulators• Site-specific
standards
• Two habitat improvements
1997
Nitrification Alternatives Study• Instream
reaeration structures
1990 2005
Aquatic Life/Habitat Assessment initiated
Additional studies
2006
Assessment presented to regulators• 6 phases over
20 years
MOU Amendment 2
2009
Phase 1 completed
2012
Phase 2 completed
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Constructed backwater
pool
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Biosolids Management History
• Heat Drying/Incineration• Lime Stabilization/Landfill• Dedicated Land Disposal• Composting• Land Application
Regulation Technology Implementation
Approach
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Biosolids Management Program
Class B Land ApplicationLand apply 93% of annual production
METROGRO Farm Private farms
6 days/weekApprox 18 truckloads/day140 mile round-trip average>300 active sites (320 acres in size)Nutrient loading-based
Approach
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Groundwater Protection 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 11-year, Monitoring Program No USGS requirement USGS proposal selected
Approach
Informational board
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• 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 opportunity Technology is new in United States
Technology and Innovation Approach
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Innovation Approach
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Approach
Prod
uctio
n
Insti
tutio
nal C
apac
ity
Tech
nolo
gy
Demand Side
Supply Side
Diffusers
Aeration basin
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Technology Innovation
Picture of Endress-Hauser
Monitor
Process modeling
Instrumentation
Aeration control21
Approach
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• Local – District initiatives• Local – Universities• National (Water Environment
Research Foundation) Knowledge areas Research program management Research project support:
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 Support Demonstration of Membrane Zero Liquid Discharge
Participation in Research and Innovation
Approach
Aquatic life monitoring
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Advance Best Practices – Capital Program• Capital Project
Management Program Standardized best practices
(e.g., cost estimating) Customized project tracking
tools and reports• Alternative delivery
methods • Contractor prequalification• Contractor incentives
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20122013
20142015
20162017
20182019
20202021
202220406080
100120140160180200220
$ millions
$1.26 billion over 10-year planning period
Best Practices
Planned capital expenditures
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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 Predictive operations using process models
• Capacity firming Assure treatment capability
24 Microthrix Parvicella
Manhole inspection
Best Practices
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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 tool
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Best Practices
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Communicate and Collaborate• Local Workgroups
Barr Lake and Milton Reservoir Watershed Association
Colorado Water Quality Forum Workgroups
• National Committees NACWA Money Matters Task Force
Congressional testimony
• District Manager on Boards of Directors: US Water Alliance Vice-Chair – Water Environment Research Foundation Chair – National Biosolids Partnership Steering Committee
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Milton Reservoir algae and stakeholders
Communication
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Outreach• Website, education, tours, news media • Northern Treatment Plant Visitor’s Center• Citizens’ Participation Group/Farm communities • University programs
Maymester at University of Colorado
• Presentations
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Communication
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This concludes the educational content of this activity.
Questions
Steve Rogowski Metro Wastewater Reclamation District