Abstract
This study aimed to describe the ozone saturation kinetics in paddy rice columns at different specific flow rates and heights, evaluate its efficacy against Sitophilus zeamais, and assess the effect on grain quality. A prototype of 15 cm diameter and 20 cm height was used. The inlet ozone concentration was 5.0 mg L−1, with ratios between grain layer heights (H) and the prototype diameter (D) of 0.6 and 1.2, and specific flow rates of 0.5, 1.0, 1.5, and 2.0 m3 min−1 t−1. Exposure time was 480 min, with residual ozone measured at intervals. Saturation times decreased with specific higher flow rates, ranging from 224 to 61 min (H/D − 1.2) and 185 to 47 min (H/D − 0.6), while saturation concentrations ranged from 1.07 to 2.70 mg L−1 ;(H/D − 1.2) and 1.38 to 2.95 mg L−1 ;(H/D − 0.6). Ozone treatments achieved 100% insect mortality, except for H/D of 0.6 and a specific flow rate of 0.5 m3 min−1 t−1, which resulted in 95% mortality. Moisture content and electrical conductivity remained stable, and only minor color changes were observed at H/D − 0.6 with higher specific flow rates. The chemical composition, including lipids, proteins, ash, and carbohydrates, was unaffected by ozonation.
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Claims 9
Claim · model-written summary
Higher flow rates shortened ozone saturation times at H/D 1.2, from 224 to 61 min.
- Taxon
- Paddy Ricet0
- Treatment
- specific higher flow ratese0
- Outcome
- Saturation timese0
- Direction
- decreasede0
- Value
- 224 to 61 mine0
Not reportedSetting
Verbatim
e0“Saturation times decreased with specific higher flow rates, ranging from 224 to 61 min (H/D − 1.2)”
t0“Paddy Rice”
Claim · model-written summary
Higher flow rates shortened ozone saturation times at H/D 0.6, from 185 to 47 min.
Not reportedDirection
Verbatim
e0“185 to 47 min (H/D − 0.6)”
t0“Paddy Rice”
Claim · model-written summary
Saturation concentration ranged from 1.07 to 2.70 mg L−1 at H/D 1.2.
Not reportedDirection
Verbatim
e0“saturation concentrations ranged from 1.07 to 2.70 mg L−1 ;(H/D − 1.2)”
t0“Paddy Rice”
Claim · model-written summary
Saturation concentration ranged from 1.38 to 2.95 mg L−1 at H/D 0.6.
Verbatim
e0“1.38 to 2.95 mg L−1 ;(H/D − 0.6)”
t0“Paddy Rice”
Claim · model-written summary
Ozone treatments generally achieved 100% insect mortality.
Not reportedComparatorDirection
Verbatim
e0“Ozone treatments achieved 100% insect mortality”
t0“Paddy Rice”
Claim · model-written summary
At H/D 0.6 and 0.5 m3 min−1 t−1, ozone achieved 95% insect mortality.
Not reportedComparatorDirection
Verbatim
e0“H/D of 0.6 and a specific flow rate of 0.5 m3 min−1 t−1, which resulted in 95% mortality”
t0“Paddy Rice”
Claim · model-written summary
Moisture content and electrical conductivity remained stable after treatment.
Not reportedTreatmentComparator
Verbatim
e0“Moisture content and electrical conductivity remained stable”
t0“Paddy Rice”
Claim · model-written summary
Color changed slightly at H/D 0.6 under higher flow rates.
Verbatim
e0“only minor color changes were observed at H/D − 0.6 with higher specific flow rates”
t0“Paddy Rice”
Claim · model-written summary
Ozonation left lipid, protein, ash and carbohydrate composition unaffected.
- Taxon
- Paddy Ricet0
- Treatment
- ozonatione0
- Outcome
- chemical composition, including lipids, proteins, ash, and carbohydratese0
- Direction
- unaffectede0
Not reportedComparator
Verbatim
e0“The chemical composition, including lipids, proteins, ash, and carbohydrates, was unaffected by ozonation.”
t0“Paddy Rice”
The same questions in other papers
ozone · pest · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.