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Strategies for Effective Biosolids Management and Odor Control in Wastewater Treatment

This presentation discusses innovative amendments and operational strategies for biosolids management at the City of Louisville's wastewater treatment facilities. Co-authored by leading experts, it highlights the importance of utilizing dried biosolids and mixtures that significantly reduce odor while enabling effective composting. The historical context of odor complaints illustrates the challenges faced from 1991 to 2002, demonstrating the necessity of public input and responsive measures. Furthermore, the session provides a comprehensive cost analysis and outlines the parameters influencing biosolids processing and air flow management.

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Strategies for Effective Biosolids Management and Odor Control in Wastewater Treatment

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  1. Corrective ActionorMove to a New Back Yard Co-authors: Ken Mason City of Louisville Dan Peters San Juan Engineering Paul Bonnici Montgomery Watson Harza Presented by: Kevin Clark Pinery Water & Wastewater District

  2. + = Biosolids Amendment • Press Solids 15% to 20% Dry • Dried Biosolids 75 % to 80% Dry • Mixture is Now 40% to 45% Dry • Low Odor & Ready to Compost

  3. Winter Operations

  4. Composting

  5. Public Education • You Must Believe In Product You Will Be Tested • Imagine Taking A Gallon Of Effluent • Biosolids Present The Same Challenges Plus a Few Surprises

  6. 1991 to 2000 7 ODOR Complaints 2001 50 ODOR Complaints PUBLIC INPUT • 2002 • 9 ODOR Complaints • 5 During North Wind Condition

  7. Options • No Change • Use Contractor Haul off Site • Cover Process Building • Other Residential Users • 1998 3 • 1999 3 • 2000 30 • 2001 75 • 2002 77 (35 new 7 months)

  8. Cost Analysis Per Dry Ton

  9. Weather Data Think Ahead • Temperature • Humidity • Wind Direction • Wind Speed • Precipitation

  10. NEW SOURCE X CHATEAU CREEKSIDE MOLLY WWTP N

  11. Biofilter • Top Soil $110.00 • Biosolids No Charge • Course Sand $90.00 • Lime $325.00 • Peat Moss $547.00 • Wood Chips $300.00

  12. Fence $180.00

  13. Blowers $415.00 each • Electrical Equipment $1520.00 • Piping Material $270.00 • 1 1/2” Rock $62.00

  14. Project Cost $3,396.00

  15. Air Flow TO Biofilter From Atmosphere

  16. 46oF 128oF

  17. Temps Pre Aeration & Post Aeration • 160 oF • 142 oF • 124 oF • 112 oF • 152 oF • 156 oF • 152 oF • 152 oF • 136 oF • 134 oF • 154 oF • 168 oF 20 minutes of Aeration Forward & Reverse (3hrs./Day Winter Avg.)

  18. ODOR Odor Gone Low Wind

  19. ODOR Odor Gone High Wind

  20. Odor Gone Phase 2

  21. Annual Operational Expenses • Black Drain Pipe • Misc. Fittings • Bark for air Distribution • Tarp Covers • Sand Bags • Annual Expense $790.00

  22. IN <.25” <.75” >.75” Screening of Product

  23. Finished Product

  24. At the very least a lot more plentiful ! ??? Questions ???

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