Ozone fumigation of stored grain; closed-loop recirculation and the rate of ozone consumption

Hardin, James A.; Jones, Carol L.; Bonjour, E. L.; Noyes, R. T.; Beeby, R L; Eltiste, D A; Decker, Samuel Wesley

doi:10.1016/j.jspr.2010.03.002

Cited by 60 publications

(35 citation statements)

References 13 publications

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“…Therefore, due to the sterilization effect in the grain mass produced in the first trial, it allowed ozone in the second trial to move quicker through the grain mass and reach the plenum in hours rather than days. Similar results were previously observed by Kells et al (2001) and Hardin et al (2010), where Phase 2 was reached faster after interruption between treatments.…”

Section: Second Ozonation Trial At Pherc In 2005supporting

confidence: 91%

“…This avoided exhausting any excess ozone into the environment and optimized its utilization. It was a similar setup as was used by Kells et al (2001) and Hardin et al (2010), but the effect and savings were not quantified.…”

Section: Summary Of Results For Ozonation With Conventional Yellow Mamentioning

confidence: 99%

“…The initial sterilization phase lasts until the target treatment is reached in the exit layer of the grain mass. Other researchers have used a similar concept but called it passivation time, which is the time required by ozone to reach a steady state level during treatment in a fixed bed system (Hardin et al, 2010). Once the ozone reaches the desirable concentration, ozonated air must continue to be moved through the grain mass and kept constant for the needed number of days to reach the CTP to complete the ozonation treatment (Kells et al, 2001).…”

mentioning

confidence: 99%

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Efficacy of Fixed Bed Ozonation Treatment to Control Insects in Stored Bulk Grain

2013

Appl. Eng. Agric.

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Section: Second Ozonation Trial At Pherc In 2005supporting

confidence: 91%

Section: Summary Of Results For Ozonation With Conventional Yellow Mamentioning

confidence: 99%

mentioning

confidence: 99%

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Efficacy of Fixed Bed Ozonation Treatment to Control Insects in Stored Bulk Grain

2013

Appl. Eng. Agric.

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“…However, to implement the ozonation process in the milling industry, additional studies are needed to obtain information regarding the behavior of this gas in the flour. According to HARDIN et al (2010), understanding the behavior of ozone gas is fundamental for its implementation as a fumigant at the industrial level.…”

Section: Introductionmentioning

confidence: 99%

“…The reaction kinetics can be characterized by the decay rate and half-life time. For ozone gas, the reaction kinetics have only been studied in maize (KELLS et al, 2001;HARDIN et al, 2010), wheat (HARDIN et al, 2010) and peanut (ALENCAR et al, 2011) grains.…”

Section: Introductionmentioning

confidence: 99%

Reaction Kinetics of Ozone Gas in Wheat Flour

et al. 2017

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ABSTRACT:The implementation of the ozonation process in the milling industry to control insect pests and improve wheat flour qualities requires understanding the behavior of ozone during ozonation. Therefore, this study aimed to investigate the reaction kinetics of ozone gas in wheat flour. Wheat flour ozonation at concentrations of 0.54, 1.07, 1.61 and 2.14 mg L -1 was used in a prototype consisting of a cylinder and a mixing system with a helical thread. The iodometric titration method was used to quantify the ozone concentration in the air stream. The reaction kinetics were characterized by determining the saturation time and the decomposition kinetics (decay rate and half-life time). With increasing ozone concentration, less time was required to saturate the wheat flour. The saturation times were 812, 434, 370 and 342 min for ozone concentrations of 0.54, 1.07, 1.61 and 2.14 mg L -1 , respectively. Increasing the ozone concentration did not influence the constant decay rate and half-life time. The ozone decomposition kinetics could be represented by a first-order model, with a decay rate constant of 0.23±0.008 min -1 and a half-life time of 3.02±0.081 min.

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