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The development of a prototype rotary drum scrubber for removing carbon dioxide (CO2) from controlled atmosphere (CA) fruit storages is described. The experimental scrubber is capable of removing carbon dioxide from the storage environment without introducing oxygen, which is a problem with most present commercial CO2 scrubbers. Lime utilization efficiency was compared with three cylinder rotational velocities, two lime slurry concentrations, and three cylinder air velocities. Only the cylinder rotational velocity was found to have a significant effect on lime efficiency, which was greater than 90%. When the CO2 absorption of the system was compared with the various test parameters, the results indicated that only the cylinder air velocity had a significant effect.
carbon dioxide scrubber, controlled atmosphere, fruit storage, lime, carbon dioxide absorption
Agricultural engineer, U. S. Cotton Research Station, Shafter, CA
Plant physiologist, Tree Fruit Research Laboratory, Wenatchee, WA
Director, National Lime Association, Lakewood, CO