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Town of Easton Wastewater Treatment Facility

Town of Easton Wastewater Treatment Facility. Striving for Excellence Today & Tomorrow. Easton Utilities. Maryland’s first municipally owned public utility founded in 1914 One of five munis in Maryland Seven business units: Electric Natural Gas Water Wastewater Cable Television

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Town of Easton Wastewater Treatment Facility

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  1. Town of Easton Wastewater Treatment Facility Striving for Excellence Today & Tomorrow

  2. Easton Utilities • Maryland’s first municipally owned public utility founded in 1914 • One of five munis in Maryland • Seven business units: Electric Natural Gas Water Wastewater Cable Television Internet Cable Advertising Sales

  3. New Wastewater Facility • Need • Opportunity • Design & Construction • Operations • Cost & Funding

  4. Need for New Facility Current facility… • will not meet new discharge standards • cannot be upgraded to meet standards • is running out of capacity

  5. Window of Opportunity • Leadership in protecting our creeks, rivers and Bay • Funding available • Interest rates favorable • New technology is cost-effective today

  6. Tougher Standards Even without one more connection, the treatment process needs to be upgraded

  7. Exceeding Current Capacity

  8. Location

  9. Designed for Today & Tomorrow • Design firm: Stearns & Wheler • Gen. contractor: Gallway Bay • Capacity: 4.0 million GPD • Target completion: Spring 2007 • Budget: $36 million • Technology meets or exceeds current and anticipated pollution standards • Project on schedule and budget

  10. Enhanced Nutrient Removal Technology Clarifiers Sand Filters Residuals Management ENR is the most effective means to reduce a leading threat to our waterways Aerators Bioreactors UV Disinfection

  11. Current Overland Flow Process Secondary Lagoon Primary Lagoon Raw Influent Overland Flow Terraces (5) Cl2 SO2 Post Aeration Outfall Recycle Pumps

  12. Biological Process Selection Workshop 2 Qualitative analysis of remaining alternatives Biolac Orbal Bardenpho Workshop 1 Biolac Orbal Bardenpho Schreiber Batch SBR ICEAS SBR 5-Stage BNR Site Visits Capital and O&M Cost Estimates Selection of EIMCO 5-Stage Bardenpho System

  13. New Liquid Process Clarifiers Screening/ Grit Removal 5-Stage Reactor Effluent Filters Return Activated Sludge WAS to Solids Treatment UV Disinfection Post-Aeration Outfall to Councell Creek

  14. New Solids Process Centrifuge Storage Silo Aerated Holding Tanks Dryer • Distribution or Disposal • Landfill Daily Cover • Landscaping • Nurseries • Farms • General Public

  15. Overland Flow Configuration

  16. New ENR Configuration

  17. 5-Stage Reactor Waste Sludge Holding Tanks Headworks Solids Processing Building Solids Storage Silo Effluent Filters Secondary Clarifiers Pump & Blower Building Operations Building UV Disinfection

  18. Cost of New Facility • $36 million (total project) • Funded through combination of debt and State grants • First project to receive funding under the Bay Restoration Fund • Residential wastewater rates doubled

  19. Rate Structure • Must be adequate to operate plant and service debt • Increases over current rates • Structured so growth costs are paid by new users • Increase stepped in to avoid rate shock

  20. Paying for New Facility • Current customers pay for improved treatment, not growth • Developers pay for additional capacity through higher capital charges Capital Charges paid by developers Additional capacity Improved treatment Quarterly usage fees paid by all customers

  21. Broad Public Purpose • Easton’s only wastewater facility • Serves regional employment center • Essential to Chesapeake Bay cleanup • Largest facility in Upper Choptank River Basin • Designed to handle sludge from other municipalities • Resource & model for other facilities throughout the state

  22. Questions & Answers

  23. Bardenpho Process Stage 1: Organisms from clarifier mix with influent and develops biological stress to facilitate phosphorus removal later. Stage 2: Bacteria consume available oxygen and reduce nitrates to gaseous nitrogen. Stage 3: Oxygen introduced to convert ammonia to nitrate, phosphorus uptake by organisms. Stage 4: Nitrate is reduced to nitrogen gas due to the low availability of oxygen as in stage 2. Stage 5: Oxygen introduced to prevent sludge from becoming septic and to retain phosphorus.

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