1 / 33

Bellingham Biosolids Planning Meeting Agenda and Criteria Updates | Brown and Caldwell

Stay updated on the Biosolids Planning Core Team Meeting with focus on post-digestion options. Explore TBL+ financial and impact criteria revisions. Discuss conceptual alternatives and off-site considerations.

elizabethporter
Download Presentation

Bellingham Biosolids Planning Meeting Agenda and Criteria Updates | Brown and Caldwell

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. City of Bellingham Biosolids Planning – Core Team Meeting April 3, 2017

  2. Agenda Brown and Caldwell

  3. Brown and Caldwell

  4. Overview of changes to Pass/Fail Brown and Caldwell

  5. Pass/Fail Criteria Updates From Last Workshop Brown and Caldwell

  6. Pass/Fail Criteria Updates From Last Workshop Brown and Caldwell

  7. Pass/Fail Criteria Updates From Last Workshop Brown and Caldwell

  8. Conceptual Alternatives – focus now on post-digestion options and end use Brown and Caldwell

  9. TBL+ Criteria Revised Financial criteria TBL+ process Brown and Caldwell

  10. Updated Financial Criteria Brown and Caldwell

  11. TBL+ Comparison of Alternatives 8 E2 Global Impact 7 E1 Local Impact 6 S2 Assets E2 Global Impact 5 S1 Health & Safety S1 Health & Safety Number of Objectives Met 4 F2 Life Cycle $ F2 Life Cycle $ E2 Global Impact 3 F1 Capital $ E1 Local Impact F1 Capital $ E1 Local Impact E1 Local Impact 2 T2 Efficiency S2 Assets S2 Assets S2 Assets T2 Efficiency 1 T1 Reliability/ Performance T1 Reliability/ Performance T1 Reliability/ Performance S1 Health & Safety 0 Ideal Alternative Alt. 1 Alt. 4 Alt. 3

  12. Key Differentiators Identified inDetailed Analyses

  13. Design Year Flows/Loads Basis Brown and Caldwell

  14. Current Population Projection Range

  15. Key Load Projection Assumptions • Land capacity analysis (LCA) represents land use buildout of City and UGA. Changes to zoning would be required to continue growth • Industrial loading (SIUs) is approximately 10% of total BOD/TSS load. Industrial load will increase based on employment growth through 2036 • City/UGA will be 100% sewered by 2036 • LWWSD growth projection consistent with 2009 Comprehensive Sewer Plan • Per capita loads • 0.20 ppcd BOD, 0.24 ppcd TSS

  16. Preliminary Influent BOD Projection Land Capacity Analysis

  17. Preliminary Influent TSS Projection Land Capacity Analysis

  18. Confirmation of Key Assumptionsto finalize flows and loads • Land capacity analysis (LCA) represents current land use of City and UGA. Zoning would change to continue same rate growth beyond 2036 • Industrial loading (SIUs) is approximately 10% of total BOD/TSS load. Industrial load will increase based on employment growth through 2036 (7%) • City/UGA will be 100% sewered by 2036 • Linear LWWSD growth projection consistent with 2009 Comprehensive Sewer Plan • North Shore (+100 households by 2026) • South Shore (+1650 households by 2026)

  19. Team Discussion • What is design year/load for Biosolids planning?

  20. Incinerator CapacityPreliminary Peak 3-Day Loading Projection Begin 24/7 operation Combined incinerator capacity Land Capacity Analysis

  21. Proposed Layout/Design Criteria Brown and Caldwell

  22. General Redundancy Criteria Mechanical Equipment • One redundant unit above peak loading condition (thickening, dewatering, process pumps, compressors, gas flares, etc.) Process Units • No redundant unit – size based on service condition of one unit off line during max month condition (digesters) • No redundant unit – size based on 2 units at 60% peak day load each (driers) • No redundant unit – size based on optimized capacity (cogeneration, gas upgrading where flare backup is available) Brown and Caldwell

  23. Solids Sizing Criteria Brown and Caldwell

  24. Biogas Sizing Criteria

  25. Offsite Assessment Brown and Caldwell

  26. Off-site Considerations • Advantages • Easier implementation of co-digestion • Reduces trucking and neighborhood impacts to Fairhaven • Economy of scale/regional option • Could preserve future capacity for Post Point Liquids treatment • Could open door to privatization options • Disadvantages • Land purchase • Permitting • Conveyance from Post Point • Operations staff at 2 locations Brown and Caldwell

  27. Documentation Goals Brown and Caldwell

  28. Who’s the Audience? Brown and Caldwell

  29. Public Outreach Brown and Caldwell

  30. April 10th Council Meeting • Overview of TBL+ criteria proposed for assessing alternatives • Demonstrate link to City Legacy Statements and Strategic Commitments Brown and Caldwell

  31. April 19th MNAC – Draft Fact Sheet Brown and Caldwell

  32. Status on other Public Outreach Activities • Official project name • Website • Other? Brown and Caldwell

  33. Next Steps • Action Items • Site visits? • Tacoma CTP (Digesters and TAGRO) • CCWWTP (Digester and Dryer) • TBL+ development Brown and Caldwell

More Related