Table 1A - Odour Source Identification Table for Sample Fryer Co. (Primary Sources) Source Description Odorous Contaminants Odour Loading Exhaust Characteristics Flow Rate Continuous or Intermittent Discharge Current Odour Control Measures Fryers – Chicken Wings VOCs High Dedicated Stack High Continuous Mist eliminators Fryers – Potato Chips VOCs Moderate Dedicated Stack High Continuous Mist eliminators Table 1B - Odour Source Identification Table for Sample Fryer Co. (Secondary Sources) Source Description Odorous Contaminants Odour Loading Exhaust Characteristics Flow Rate Continuous or Intermittent Discharge Current Odour Control Measures Dry Seasonings – Pre-dust drums VOCs Low Passive Vents and Pressure Relief Valves Low Continuous and Intermittent Sources Bin vent filter Wet Seasonings – Marinators, Sauce Applicators VOCs Low to Moderate Vertical Stacks, Horizontal Exhausts, and Passive Vents Low Continuous Vertical Stacks, unimpeded with appropriate discharge velocity Site-specific Source Description General indicators of the odour loading, stack parameters, and exhaust gas flow rate are provided in Tables 1A and 1B. Facilities should ensure that all available source and stack data, available through their Emission Summary and Dispersion Modelling (ESDM) report, is used to describe the odour sources as accurately as possible.
Table 5 – Summary of Feasibility Assessment for Sample Fryer Co. Odour Source Description of Control Measure Technically Feasible? Notes Fryers, Seasoning Stack Optimization Technically Feasible If the odour loading results in off-site effects on the immediate surroundings, improved dispersion by optimizing the stack parameters can be effective. Combining multiple stacks to one optimized stack may improve dispersion. Fryers Thermal Treatment: Recirculate fryer exhaust gas to fryer burner Technically Feasible Thermal treatment will be evaluated should additional measures be needed to control fugitive odours from the dryers. Modifying the characteristics of the exhaust gas by adding recirculation back to a burner for incineration as part of the air make-up would reduce odour emissions. The particulate matter, oil mist, and grease present in the exhaust gas must be considered. Fryers Thermal Treatment: Boiler Incineration Technically Feasible Thermal treatment will be evaluated should additional measures be needed to control fugitive odours from the dryers. This may require additional energy input to heat lines; this may be offset if there is a heat recovery system. Fryers Oil Mist Eliminator / Demister / Screen Separator Technically Feasible – previously implemented Systems have been previously installed and result in the removal of particulate matter, grease, and oil mist by mist eliminators which result in mitigate of odours. Fryers Rotoclone Technically Feasible A mist eliminator is currently installed for removal of particulate matter, grease, and oil mist.
Appendix B – Control Equipment Descriptions Appendix B provides general information on the control measures identified in this example OCR. Details such as whether the control measure is considered to be in the developmental stage, where it may be applicable, and what limitations may exist, are given. Facilities may also consider contacting equipment suppliers for further information to determine whether a particular control measure may be technically feasible at their site. This information is provided in order to illustrate what may be considered when assessing the feasibility of a control measure. Including this level of detail on potentially feasible control measures is not a requirement of the OCR and is provided as reference material only. B.1 Oil Mist Eliminator B1.1 Technologies Demister / Screen Separator B1.2 Emission Characteristics Exhaust gas with oil mists or liquid droplets. B1.3 Air Emission Sources Common Applications: Oil Fryers Brine Desalination Petroleum Refining Cooling towers B1.4 Description A demister or mist eliminator is a device that enhances the removal of liquid droplets in a vapor stream. Demisters may be mesh type, vane demisters, swirl mist eliminators, Brownian diffusers, or other structure. Due to the influence of the demister, the mists aggregate into droplets that are heavy enough to separate from the vapor stream. B1.5 Applicability and Performance Direct impact demisters have high removal efficiencies of up to 100% over 5 micron. Demisters are simple structures with low capital and maintenance costs. B1.6 Limitations Routine maintenance required to prevent demister pad clogging or flooding, increasing the pressure drop.