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Efficacy and fumigation characteristics of ozone in stored maize
Journal of Stored Products Research ( IF 2.7 ) Pub Date : 2001-10-01 , DOI: 10.1016/s0022-474x(00)00040-0
S A. Kells 1 , L J. Mason , D E. Maier , C P. Woloshuk
Affiliation  

This study evaluated the efficacy of ozone as a fumigant to disinfest stored maize. Treatment of 8.9tonnes (350bu) of maize with 50ppm ozone for 3d resulted in 92-100% mortality of adult red flour beetle, Tribolium castaneum (Herbst), adult maize weevil, Sitophilus zeamais (Motsch.), and larval Indian meal moth, Plodia interpunctella (Hübner) and reduced by 63% the contamination level of the fungus Aspergillus parasiticus Speare on the kernel surface. Ozone fumigation of maize had two distinct phases. Phase 1 was characterized by rapid degradation of the ozone and slow movement through the grain. In Phase 2, the ozone flowed freely through the grain with little degradation and occurred once the molecular sites responsible for ozone degradation became saturated. The rate of saturation depended on the velocity of the ozone/air stream. The optimum apparent velocity for deep penetration of ozone into the grain mass was 0.03m/s, a velocity that is achievable in typical storage structures with current fans and motors. At this velocity 85% of the ozone penetrated 2.7m into the column of grain in 0.8d during Phase 1 and within 5d a stable degradation rate of 1ppm/0.3m was achieved. Optimum velocity for Phase 2 was 0.02m/s. At this velocity, 90% of the ozone dose penetrated 2.7m in less than 0.5d. These data demonstrate the potential usefulness of using ozone in managing stored maize and possibly other grains.

中文翻译:

臭氧在贮藏玉米中的功效及熏蒸特性

该研究评估了臭氧作为熏蒸剂对储存玉米进行消毒的功效。用 50ppm 臭氧处理 8.9 吨 (350bu) 玉米 3 天导致成年红粉甲虫、Tribolium castaneum (Herbst)、成年玉米象鼻虫、Sitophilus zeamais (Motsch.) 和幼虫印度粉螟的死亡率为 92-100% Plodia interpunctella (Hübner) 和降低 63% 的真菌寄生曲霉在谷粒表面的污染水平。玉米的臭氧熏蒸有两个不同的阶段。第 1 阶段的特点是臭氧的快速降解和谷物中的缓慢移动。在第 2 阶段,臭氧在谷物中自由流动,几乎没有降解,一旦导致臭氧降解的分子位点饱和,就会发生臭氧。饱和率取决于臭氧/空气流的速度。臭氧深度渗透到谷物中的最佳表观速度为 0.03m/s,这是在使用当前风扇和电机的典型存储结构中可实现的速度。在这个速度下,85% 的臭氧在第 1 阶段的 0.8d 内穿透 2.7m 进入谷物柱,并在 5d 内达到 1ppm/0.3m 的稳定降解率。阶段 2 的最佳速度为 0.02m/s。在这个速度下,90% 的臭氧剂量在不到 0.5 天的时间内穿透了 2.7m。这些数据证明了使用臭氧在管理储存的玉米和可能的其他谷物方面的潜在用途。在第 1 阶段的 8d 和 5d 内实现了 1ppm/0.3m 的稳定降解率。阶段 2 的最佳速度为 0.02m/s。在这个速度下,90% 的臭氧剂量在不到 0.5 天的时间内穿透了 2.7m。这些数据证明了使用臭氧在管理储存的玉米和可能的其他谷物方面的潜在用途。在第 1 阶段的 8d 和 5d 内实现了 1ppm/0.3m 的稳定降解率。阶段 2 的最佳速度为 0.02m/s。在这个速度下,90% 的臭氧剂量在不到 0.5 天的时间内穿透了 2.7m。这些数据证明了使用臭氧在管理储存的玉米和可能的其他谷物方面的潜在用途。
更新日期:2001-10-01
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