Table 1A - Odour Source Identification Table for Sample Brewery Co. (Primary Odour Sources) Source Description Odorous Contaminants Odour Loading Exhaust Characteristics Flow Rate Continuous or Intermittent Discharge Current Odour Control Measures Brew Kettle VOCs H2S High Dedicated Vertical Stack Low Intermittent Condenser Fermentation Vessels VOCs (90% ethanol) High Dedicated Vertical Stack Low Continuous Capture and CO2 Recovery Brewer’s Grain, Trub and Yeast Dryers VOCs High Dedicated Vertical Stack High Continuous Thermal oxidizer Activated Carbon Regeneration (CO2 purification circuit) VOCs High Dedicated Vertical Stack Low Intermittent Vertical stack Process Controls BMPs Table 1B - Odour Source Identification Table for Sample Brewery Co. (Secondary Odour Sources) Source Description Odorous Contaminants Odour Loading Exhaust Characteristics Flow Rate Continuous or Intermittent Discharge Current Odour Control Measures
Malt Kiln VOC Low Vertical Stack High Continuous BMPP Brewhouse Sources VOC Moderate Passive Vents Pressure Relief Valves Low Intermittent BMPP Fermentation Sources VOC Moderate Vertical Stacks Horizontal Exhausts Passive Vents Low Continuous BMPP Filling and Storage VOC Moderate Vertical Stack General Exhausts Moderate Continuous BMPP Brewer’s grain, trub, and yeast handling and storage VOC Low / Moderate Outdoor Silo Bin Vent Fugitive Emissions Low Intermittent BMPP 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
B.3 Absorption B3.1 Technologies Wet Scrubbers (packed bed absorber, plate absorber, and spray scrubber) B3.2 Emission Characteristics Wet scrubbers are most effective on exhaust gases with high concentrations of VOCs or water soluble compounds, and to a lesser degree particulate matter. B3.3 Air Emission Sources Common Applications: Food manufacturing and cooking Mineral processing Fertilizer plants Asphalt plants B3.4 Description The process involves a mass transfer between a soluble gas and a liquid solvent such as water. The addition of an oxidizing agent to the scrubbing solution may increase odour removal efficiency by reacting with the odorous compounds. Sodium hypochlorite, hydrogen peroxide, ozone, potassium permanganate, acids, and caustics are frequently used as the scrubbing medium. B3.5 Applicability and Performance Primarily used for inorganic fumes and gases, VOCs, and particulate matter. The control efficiency for VOCs varies depending upon the type of scrubber, and a range of 70 to 90% control is expected. Wet scrubbers have relatively low capital and operating costs compared with other treatment technologies, as well as relatively small space requirements. Absorption units can handle gases with high temperature and high moisture contents. B3.6 Limitations The requirements for the scrubber outlet concentrations affect the scrubber design (liquid flowrate, scrubber dimensions), and may result in unreasonably tall towers or long liquid-gas contact times and excessive liquid volumes. A liquid waste stream is generated. Spray chambers are not generally suitable for odour or VOC control. B3.7 References Air & Waste Management Association. 1992. Air Pollution Engineering Manual. European Commission. 2006. Integrated Pollution Prevention and Control Reference Document on Best Available Techniques in the Food, Drink and Milk Industries (EU BREF) Section 4.4.3.8 Absorption. US EPA. Air Pollution Control Technology Fact Sheets: Packed Bed / Packed Tower Wet Scrubber EPA-452/F-03-015, Spray Tower Wet Scrubber EPA-452/F-03-016.
European Monitoring and Evaluation Programme (EMEP)/European Environment Agency. 2016. Air Pollution Emission Inventory Guidebook. Goldammer, T. 2008. The Brewer’s Handbook. Hansen, J.H. 2012. Input to TWG on BAT Candidates for Breweries. Ontario Ministry of the Environment and Climate Change. 2017. Guide to Requesting a Standard. Version 2.0. Ontario Regulation 419. PIBS #6322e02. San Joaquin Valley Unified Air Pollution Control District. 2007. Appendix K: Reasonably Available Control Technology Analysis (RACT) for Wine Fermentation, Wine Storage Tanks, and Brandy Aging. . US EPA. 1993 – 2014. Economic and Cost Analysis for Air Pollution Regulations: Economic Impact Analyses and Industry Profiles by Sector.