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ACEC Environmental Business Conference 9/20/2007

ACEC Environmental Business Conference 9/20/2007. Odor Control 101. Bruce Koetter, P.E. Webster Environmental Associates, Inc. Louisville, Kentucky. Odor Control Project Elements. Preliminary Site Evaluation Odor Survey Laboratory Testing Dispersion Modeling

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ACEC Environmental Business Conference 9/20/2007

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  1. ACECEnvironmental Business Conference9/20/2007 Odor Control 101 Bruce Koetter, P.E. Webster Environmental Associates, Inc. Louisville, Kentucky

  2. Odor Control Project Elements • Preliminary Site Evaluation • Odor Survey • Laboratory Testing • Dispersion Modeling • Presentation of Results/Recommendations • Owner Review/Select Course of Action • Design Improvements • Construction of Improvements • Startup and Testing

  3. Preliminary Site Evaluation • Site Visit • Discussions with Owner • Identify Location of Off-Site Complaints • Become Familiar with Plant Processes • Identify Potential Odor Sources • Develop Testing Plan

  4. Odor Survey • Collect Air Samples for Laboratory Analysis • Field Testing Using Handheld Instruments • pH, DO, Sulfides in Liquid Stream

  5. Teflon Pump Teflon Pump Carbon Filter 2.5 L/min Set Flow at 5 L/min Flux Chamber Tedlar Bag Ambient Air Odor Source Vacuum Chamber with Sample Bag

  6. Odor Panel Testing • Odor Detectability/Dilutions to Threshold (D/T) • Odor Recognition Threshold • Odor Intensity • Hedonic Tone • Odor Character

  7. Odorous Compound Identification • Reduced Sulfur Compound Analysis (GC/FPD) • Volatile Organic Compound Analysis (GC/MS) • Hydrogen Sulfide (Field Instrument) • Ammonia (Gas Detection Tubes)

  8. Computer program to predict what impact a group of odor sources will have in the surrounding area Same program used by EPA to predict downwind pollutant concentrations Inputs include meteorological data, odor emission rates, odor source locations and characteristics, terrain data Outputs include resulting peak odor concentration (DT) and odor frequencies in area surrounding the odor sources Odor Dispersion Modeling

  9. Presentation of Results/Recommendations • Present Test Results • Discuss Odor Control Alternatives • Present Recommendations • Provide Cost Estimates Owner Selects Course of Action

  10. Control Considers Level of Control Required and Associated Costs • Selects Course of Action • Identifies Funding Source • Selects Design Engineer

  11. Odor Control Alternatives • Covers/Enclosures • Chemical Scrubbing • Carbon Adsorption • Activated Sludge Diffusion • Biofiltration • Bioscrubbing • Thermal Oxidation • Chemical Addition • Oxygen Injection

  12. Floating Lagoon Cover

  13. Floating Lagoon Cover with Duct

  14. Dome Tank Cover

  15. Effluent Weir Covers

  16. SEPTAGE ENCLOSURE PICTURE SEPTAGE SCREEN ENCLOSURE

  17. Wet Scrubbers Chemical Scrubber

  18. Carbon Adsorber CarbonAdsorbers

  19. Activated Sludge Diffusion

  20. EFFLUENT WEIR COVERS

  21. AIR FILTER

  22. Custom-Built Biofilter

  23. Pre-Manufactured Biofilter

  24. Bioscrubbers

  25. Thermal Oxidizers

  26. Chemical Addition

  27. Summarize: • Must Identify/Rank Sources of Odor • Determine Compounds in Odor • Develop Odor Control Alternatives • Model to Evaluate Impact on Community • Evaluate Control Alternatives and Costs • Design and Construct

  28. Questions?

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