Abstract
The aim of this study was to investigate the effect of two-stage variable temperature drying (VTD) on the quality and drying efficiency of paddy rice in the hot air-drying process. A constant temperature of 50 °C (CTD) was used as a control group. VTD and CTD methods were applied in a 15 ton batch type recirculating grain dryer. Three aspects (appearance quality, physical and chemical properties, taste quality) of the paddy rice samples from the dryer were measured and compared. It was observed that paddy rice with an initial moisture content of 25.3% (wet basis) was dried to 14% (wet basis). Compared to CTD, the VTD method could reduce the drying time and fissuring rate by 0.7 h and 42%, respectively. It had a head rice yield (HRY) of 78.45%, compared to 76.45% by CTD. The fatty acid content of the VTD samples was 2.28% lower than those of CTD, and it exhibited a 34% decrease in amylose content. These results show that two-stage VTD is an advanced hot air-drying method that can be used to improve the quality of dried paddy rice, maintain efficiency, and reduce the cost of the drying process by minimizing the rate of energy consumption.
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Claims 7
Claim · model-written summary
Paddy rice moisture declined from 25.3% to 14% during drying.
Verbatim
e0“paddy rice with an initial moisture content of 25.3% (wet basis) was dried to 14% (wet basis)”
Claim · model-written summary
VTD shortened drying time by 0.7 h relative to CTD.
Verbatim
e0“Compared to CTD, the VTD method could reduce the drying time and fissuring rate by 0.7 h and 42%, respectively”
t0“Paddy Rice”
e1“VTD and CTD methods were applied in a 15 ton batch type recirculating grain dryer”
Claim · model-written summary
VTD reduced paddy rice fissuring rate by 42% relative to CTD.
Verbatim
e0“Compared to CTD, the VTD method could reduce the drying time and fissuring rate by 0.7 h and 42%, respectively”
t0“Paddy Rice”
e1“VTD and CTD methods were applied in a 15 ton batch type recirculating grain dryer”
Claim · model-written summary
VTD had 78.45% head rice yield versus 76.45% under CTD.
- Taxon
- Paddy Ricet0
- Treatment
- VTDe1
- Outcome
- head rice yielde0
- Value
- 78.45%e0
- Qualifier
- 76.45%e0
- Comparator
- CTDe0
Not reportedDirection
Verbatim
e0“It had a head rice yield (HRY) of 78.45%, compared to 76.45% by CTD”
t0“Paddy Rice”
e1“VTD and CTD methods were applied in a 15 ton batch type recirculating grain dryer”
Claim · model-written summary
VTD reduced fatty acid content by 2.28% relative to CTD.
Verbatim
e0“The fatty acid content of the VTD samples was 2.28% lower than those of CTD”
t0“Paddy Rice”
e1“VTD and CTD methods were applied in a 15 ton batch type recirculating grain dryer”
Claim · model-written summary
VTD decreased amylose content by 34%.
Not reportedComparator
Verbatim
e0“it exhibited a 34% decrease in amylose content”
t0“Paddy Rice”
e1“VTD and CTD methods were applied in a 15 ton batch type recirculating grain dryer”
Claim · model-written summary
The authors recommend two-stage VTD to improve dried rice quality and efficiency and reduce drying cost.
Verbatim
e0“two-stage VTD is an advanced hot air-drying method that can be used to improve the quality of dried paddy rice, maintain efficiency, and reduce the cost of the drying process by minimizing the rate of energy consumption”
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