Case Study | April 8, 2008

Coffee Roaster Saves Over $500,000/Year, Reduces CO2 Emissions

Source: Controlled Environment Equipment

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Case Study: Coffee Roaster Saves Over $500,000/Year, Reduces CO2 Emissions

Controlled Environment Equipment Corp was called into a Coffee Roasting Facility in the Southern part of the United States to review and analyze their existing Emission Control System for the off-gases from roasting coffee beans. We found that the existing system used a catalytic oxidizer section that continued to fail due to high temperatures, coating from high boiler condensables, and high fuel usage when the VOC emissions were not present.

A coffee roasting process runs in cycles that average about 6 minutes and the VOC's are emitted in very high concentrations for about 1 minute of that cycle. Then there is setup time for the next cycle, during which time the oxidizer is still running, and the next 6 minute cycle starts again. In addition to large temperature swings and high VOC spikes, there are also particles that are emitted and hydrocarbons which condense on everything in the airstream and require constant maintenance. The ductwork continues to develop a crusty coating which in many cases need to be scraped off; this application was quite a challenge to design a system to meet all of the requirements and make the customers life easier.

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Case Study: Coffee Roaster Saves Over $500,000/Year, Reduces CO2 Emissions

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