Evaluation of ethylene scrubber
2001
Yamashita, I. (National Inst. of Vegetable and Tea Science, Ano, Mie (Japan))
Four prototype ethylene scrubbers that were composed of palladium chloride-activated carbon filter and blower were produced in order to establish the assess method for the performance of scrubbers. For the assessment of ethylene removing speed, the atmosphere in the gas-tight prefabricated walk-in refrigerator ( 6cube m at 3degC) was replaced with 13ppm of ethylene, then the ethylene concentration was monitored. The half reduce time was shortened from 12 to 1.5 hours by using 1 to 4 scrubbers. The ethylene removing speed was successfully evaluated by the proposed method because higher performance of scrubber resulted in the rapider removal of ethylene. To assess the effect of scrubbers on prevention of ethylene accumulation in storage room, 1 % ethylene was continuously supplied into the refrigerator at the rate of 2 ml/min, then the ethylene concentration was monitored. A reliable method to evaluate the performance was established because the increase in the number of scrubbers used gave more effective prevention of ethylene accumulation. Commercial type ethylene scrubberwas developed and its performance was assessed by the mentioned methods. The supplemental tests, long period test and ripening inhibition test of mini-tomatoes, suggested the high performance of the scrubber.
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