List of Tables Table 1A – Odour Source Identification Table for Sample Sugar Refinery Co. (Primary Sources) Table 1B – Odour Source Identification Table for Sample Sugar Refinery Co. (Secondary Sources) Table 2 – Potential Alternative Odour Control Measures for Sample Sugar Refinery Co. Table 3 – Potential Odour Control Measures for Sample Sugar Refinery Co. Primary Sources Table 4 – Potential Odour Control Measures for Sample Sugar Refinery Co. Secondary Sources Table 5 – Summary of Feasibility Assessment for Sample Sugar Refinery Co. Table 6 – Control Measures or Procedures to be Evaluated for Implementation Appendices Appendix A – Supplemental Guidance for Developing a Facility Specific OCR Appendix B – Control Equipment Descriptions
Odour Source Control Measure Applicability All Primary Sources Stack Optimization Effective stack design will improve dispersion to reduce effects with vertical, unimpeded discharge at optimal stack height and velocity, as well as potentially combining individual exhausts to common tall stacks. All Primary Sources Wet Scrubber (including Rotoclones) Effective particulate matter removal, but limited VOC removal. All Primary Sources Oxidizing Scrubber Wet scrubbers that use an oxidizing agent such as hydrogen peroxide, bleach, or others, as the scrubbing solution. Oxidizing agents may be problematic for wastewater treatment. All Primary Sources Thermal Treatment Thermal oxidation is highly effective at removing odorous VOCs. Odorous exhaust flow may be directed to the site boiler combustion chamber for incineration, or to a thermal oxidizer. All Primary Sources Biofilter Process exhausts are directed to a conditioning system and biofilter where microorganisms biologically degrade the organic compounds. All Primary Sources Ozonation Concentrated ozone injected into exhaust gases to oxidize VOCs. All Primary Sources Non-Thermal Plasma Treatment Activated plasmas gas injected into waste gas stream to oxidize VOCs. Raw Sugar Storage Engineering Controls: Containment and Environmental Controls Ensure raw sugar is protected from moisture and weather exposure during transportation, receiving, and storage to prevent fermentation. Clarification (Carbonatation) Process Optimization: Change Carbonatation Process Use purchased pure CO2 instead of on-site boiler flue gas to eliminate the requirement of carbonatation exhausts and the associated odour emissions. Clarification (Carbonatation) Process Optimization: Change Carbonatation Process Change from carbonation to phosphatation to eliminate the requirement of carbonation exhaust and its associated odour source.
Granulator Oxidation Scrubber Wet scrubbers that use an oxidizing agent such as hydrogen peroxide, bleach, or others, as the scrubbing solution. Oxidizing agents may be problematic for wastewater treatment. Granulator Thermal Treatment Thermal oxidation is highly effective at removing odorous VOCs. Odorous exhaust flow may be directed to the boiler combustion chamber for incineration, or to a thermal oxidizer. Granulator Biofilter Process exhausts are directed to a conditioning system and biofilter where microorganisms biologically degrade the organic compounds. Granulator Ozonation Concentrated ozone injected into exhaust gases to oxidize VOCs. Granulator Non-Thermal Plasma Treatment Activated plasmas gas injected into waste gas stream to oxidize VOCs. All Secondary Sources Process Optimization: Production Scheduling Use process monitoring, transfer flow monitoring in conjunction with automated shut-off to avoid overfills or spills. Reduced ingredient wastage and less potential for human error results in potential of reduced fugitive odour emission sources. All Secondary Sources Process Optimization: Enhanced Automation Use of tank volume monitoring, transfer flow monitoring in conjunction with automated shut-off to avoid overfills or spills. Reduced ingredient/product wastage and less potential for human error results in potential of reduced fugitive odour emission sources. All Secondary Sources Best Management Practices Develop SOPs and train employees on BMPs for process and control equipment maintenance and operation, good housekeeping, spill prevention and response, reducing chemical and cleaner usage, and managing wastes. Of specific note, procedures are in place to ensure raw sugar and off-spec materials are segregated, handled, stored and disposed of in a manner that limits the potential for fermentation and spoilage. Implement and enforce effective vehicle sanitation practices.
All Primary Sources Biofilter Technically Not Feasible The amount of free space required for a biofilter footprint large enough to achieve the appropriate residence time, as well as the humidification chamber and all the other support equipment, is not available at this facility. There may also be an issue with inconsistent feed due to the batch processes causing variability in the biofilter loading. All Primary Sources Ozonation Technically Not Feasible Ozonation is an emerging technology and there is limited documentation on demonstrated control efficiency or applicability. All Primary Sources Non-Thermal Plasma Treatment Not Technically Feasible Non-thermal plasma is an emerging technology and there is limited documentation on demonstrated control efficiency or applicability. Raw Sugar Storage Engineering Controls: Containment and Environmental Controls Technically Feasible Changes to the exhaust of raw sugar storage area will be evaluated should additional measures be needed to control fugitive odours, as well as conditions in the storage area.