Introductory course on environmental odour management

Traditionally, Industries that produced odour impacts on the surrounding communities had not many tools to tackle this issueFor this reason, these type of industries must pay special attention to the confinement, capture and control of the gases produced. Previously, not much time was dedicated to this subject, but currently, with the demand of citizens for better air quality, the training of technicians who manage the odour emission of an activity is essential.

The aim of this course will be to inform and train on the most important aspects to be taken into account for the proper management of odour emissions in odour emitting industries: how odours are measured, how they are controlled and which are the most relevant regulations and standards to carry out the control of the activity.

What you'll learn


  • Get to know the tools available for odour managers.
  • Perform odour evaluations
  • Understand industrial ventilation
  • Understand and present odour results




  • No specific prior knowledge required
  • Familiarity with air pollution and meteorology concepts is helpful




This course aims to give a general overview of odour management in an industry of this type, describing in a general way the different existing tools and the state of science at present.


Course Content


Part 1

- Session I: Introduction to Odours

  • Perception and characterisation of odours.
  • Sources of odour emission.
  • Methods to estimate the odour emission from a plant
    • Dynamic Olfactometry
    • IOMS
    • Field inspections
    • Chemical characterization
    • Field Olfactometry
    • Citizen Science


- Session II: Legislation, regulations and dispersion models

  • Odour legislation
  • Odour regulations.
  • Chemical analysis.
  • Dispersion models
  • Forecast dispersion models.


- Session III: Odour control methods in several industrial sectors

  • Introduction to Odour control methods
    • Physical methods
    • Chemical methods
    • Biological methods
    • Mixed method
    • Operational approaches
    • Best Available Techniques

Part 2


- Session IV: Odour control

  • Design basis for odour emission control
  • Computational Fluid Dynamics Models
    • Concepts
      • Flow pattern
      • Number of renewals/hour
      • Air age
      • Ventilation system efficiency
    • Types of CFDs
  • Methods of odour control in hoppers
  • Methods of odour control in presses
  • Odour control methods in centrifuges
  • Odour control methods for fugitives

- Session V: Containment, ventilation, etc.

  • ◦ Confinement
    • Types of covers
    • Types of domes
    • Types of fugitives emission in collectors
    • Ventilation flows
    • Spaces not accessible to workers
    • Spaces accessible to workers
    • Confined spaces
    • Pipes, ducts and fans
    • Valves
  • Ventilation
  • Odour Emission Capacity (CEO)
  • Methods for monitoring
  • Determination of the effect of corrective measures
  • Evaluation of the effectiveness of control measures.
  • Operational decisions to prevent odour emission if their impact is known in advance.
  • Balance between the objective measurement of an odour and the subjective perception of odours.
  • FIDOS (Frequency, Intensity, Duration, Offensiveness and Sensitivity of receptors)
  • Calculation of retrotrajectories to find out the source of the odour.




Carlos Nietzsche Díaz has more than 18 years of experience in environmental odour management. He has attended most of the international conferences on odour management in the environment and has organised five international conferences being the coordinator of the scientific committee in all cases. He has organised the only specialised courses carried out to date on the CALPUFF dispersion model and odours in 2013 and 2014 in Madrid and Santiago, respectively, with the CALPUFF model development group coordinator Joseph Scire and the New Zealand expert Jennifer Barclay. Carlos Díaz is a member of the Odour and Volatile Emissions Committee of the International Water Association (IWA) and of the Air Quality and Odour Control Committee of the Water Environment Federation (WEF). He is also an authorised representative of AENOR in the Working Group of the European Committee for Standardisation (CEN) which is updating the standard EN 13725, determination of odour concentration by dynamic olfactometry and in the Standard on Electronic Sensors for the measurement of odours (IOMS).

Carlos Díaz is the main editor of the website, the site dedicated to odour management in the environment and is the president and founding member of the International Environmental Association of Odour Managers (AMIGO) (

Cyntia Izquierdo is a Chemical Engineer with extensive experience in odour management. She has carried out the assessment of odour emissions in several industrial plants and has been in charge of the coordination of the III International Conference on odour management in the environment that took place in Bilbao in November 2015 and the IV International Conference on odour and VOC management in the environment that took place in Valladolid in September 2017. Cyntia is a founding member of the International Environmental Association of Odour Managers (AMIGO) and participates as an associate editor in the web, the portal dedicated to odour management in the environment, as well as having participated in several training sessions on odour emission management.



 This course is offered online for a minimum group of 10 students. Cost per student 330€. Available discounts for larger groups.


This course includes:

    4.5 hours on-demand video
    11 articles
    6 downloadable resources
    2 years access
    Access on mobile and TV (mirror screen)
    Certificate of completion