Attachment 10-Air Quality and Odour Assessment · MCU23/0078

◼     Stage 2: Measures to Implement
In this stage, the appropriate emission and odour control measures are defined. The general measures that
are to be implemented are summarized in Section 5. A work plan should be developed to execute these
effectively. It will serve to identify measures that are both applicable and feasible for each restaurant, assign
responsible teams to lead the implementation, and set performance indicators to measure the success, or
failure, of the control measures.
The selection of odour control equipment for a facility will depend on the impact risk level identified in Stage 1.
Table 6.2 presents the specific odour control requirement corresponding to the different impact risk levels. It
is important to highlight that, for practical reasons, certain kitchens categorized as low risk may not be required
to install any odour control equipment. This consideration takes into account the nature of the food being
cooked and/or the size of kitchen and/or its location.

Table 6.2: Odour control requirement (Adapted from Control of Odour and Noise from
Commercial Kitchen Exhaust Systems, DEFRA, 2018)

 Impact risk/odour control level                                                               Odour control
                                                                                               requirement
 Low to medium level                                                                           1. Fine filtration1 or ESP2
                                                                                                  followed by carbon
                                                                                                  filtration3 (carbon filters
                                                                                                  rated with a 0.1 second
                                                                                                  residence time)
                                                                                               2. Fine filtration followed by
                                                                                                  counteractant/neutralising
                                                                                                  system4 to achieve same
                                                                                                  level of control as 1
 High level                                                                                    1. Fine filtration or ESP
                                                                                                  followed by carbon
                                                                                                  filtration (carbon filters
                                                                                                  rated with a 0.2 – 0.4
                                                                                                  second residence time)
                                                                                               2. Fine filtration or ESP
                                                                                                  followed by UV ozone
                                                                                                  system5 to achieve same
                                                                                                  level of control as 1
 Very high level                                                                               1. Fine filtration or ESP
                                                                                                  followed by carbon
                                                                                                  filtration (carbon filters
                                                                                                  rated with a 0.4 – 0.8
                                                                                                  second residence time)
                                                                                               2. Fine filtration or ESP
                                                                                                  followed by carbon
                                                                                                  filtration and by
                                                                                                  counteractant/neutralising
                                                                                                  system to achieve same
                                                                                                  level of control as 1
                                                                                               3. Fine filtration or ESP
                                                                                                  followed by UV ozone
                                                                                                  system to achieve same
                                                                                                  level of control as 1
 Notes:
 1.   A typical filtration system may be supplied with three stages of progressively
      more efficient filtration. Bag filter, panel filter, and HEPA filter are example types
      of filters to remove particles. These filters do not remove gaseous phase odours.
 2.   An electrostatic precipitator (ESP) uses electric charge to remove particles.




237401.0145.R01V02                                                                                                      Page 17