Trinity Consultants

Fundamentals of Odor: Measurements, Modeling, and Minimization



This 1-day course is for corporate/facility environmental personnel who need to assess, control, and manage odor, as well as those tasked with handling odor complaints or designing odor ordinances. The course examines how odor is measured and objectively analyzed, how off-site odor impacts are modeled, and strategies to successfully control and minimize odor. The course includes case studies on odor issues in industry, exercises on Odor Response Planning, and group activities using basic odor sampling equipment.

Attendees learn about:

  • Methods to quantify and characterize odor including use of “odor panels” and field equipment
  • Converting odor measurements to dispersion modeling inputs and interpreting model results
  • Benefits and potential shortcomings of mitigation and abatement strategies
  • Developing an effective Odor Response Plan to record and respond to odor complaints

Course Topics

Introduction:  Importance and Need for the Odor Course

  • Difficulties and nuances with odor
  • Briefly explore potential case studies and rulings
  • Residential encroachment
  • Acute and public perceptions
  • Pitfalls

Fundamentals of the Science of Odor

  • The science of odor analysis
  • Understanding Odor Units (ou)
  • Detection thresholds, recognitions thresholds, hedonic characterizations
  • Indicatory analyses (e.g., H2S, ammonia)
  • Understanding the limitations

Rules & Regulations

  • Explore differences in various jurisdictions: US States, Canadian Provinces, and European Criteria
  • Explore inconsistencies and gaps in regulations
  • Explore the common elements in odor laws, including local policies
  • Examples/case studies

Concerns of the Industry:  Occupational Odor (indoor workplace) and Environmental Odor (off-site releases)

  • Outline example problems facing the industry
  • Work through issues
  • Group discussions

Sampling Strategies

  • Source testing protocols
  • Sampling methods
  • Equipment overview and evaluations
  • Recommendations
  • Field olfactometers
  • Direct vs. ambient measurements

Assessment Strategies

  • Modeling analysis
  • Atmospheric influences
  • Ambient monitoring programs
  • Odor mapping

Odor Control and Abatement Strategies

  • Control equipment overview
  • Cost benefit overview
  • Basic of ventilation and ventilation strategies
  • Benefits of understanding stacks, fan

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