scholarly journals Drying Characteristics and Quality Attributes Affected by a Fluidized-Bed Drying Assisted with Swirling Compressed-Air for Preparing Instant Red Jasmine Rice

Processes ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1738
Author(s):  
Prarin Chupawa ◽  
Tiwanat Gaewsondee ◽  
Wasan Duangkhamchan
Keyword(s):  
Fluidized Bed ◽  
Air Temperature ◽  
Effective Diffusion ◽  
Quality Attributes ◽  
Air Pressure ◽  
Compressed Air ◽  
Model Parameters ◽  
Drying Characteristics ◽  
Fluidized Bed Drying ◽  
Jasmine Rice

A new process for the production of instant red jasmine rice was investigated using fluidized bed drying with the aid of swirling compressed air. Drying characteristics were evaluated using the operating parameters of fluidizing air temperature (90–120 °C) and pressure of swirling compressed air (4–6 bar). Appropriate air pressure was determined based on the highest value of model parameters from the semi-empirical Page equation and effective diffusivity. Influences of supply time of swirling compressed air (2–10 min) and drying temperature of 90–120 °C were investigated and optimized based on the quality attributes using response surface methodology. Drying at 120 °C and compressed air pressure of 6 bar gave the highest rate constant and effective diffusion coefficient. Drying at 120 °C combined with injecting swirling air for 2 min was the most suitable approach, while drying at 90 °C and supplying compressed air for 10 min was the best choice to preserve antioxidant properties. Air temperature of 98.5 °C with 2 min supply of swirling compressed air suitably provided high physical and rehydration properties and retained high health benefits of antioxidant compounds. Finally, after rehydration in warm water at 70 °C for 10 min, the textural properties of the rehydrated rice sample were comparable to conventionally cooked rice.

Study of Fluidized Bed Drying Method Used For Safe Storage of Rice And Its Analyais

2015 ◽  
Vol 3 (2) ◽  
Author(s):  
Rakesh Verma ◽  
Bharat Raj Singh
Keyword(s):  
Fluidized Bed ◽  
Air Temperature ◽  
Flow Rate ◽  
Material Flow ◽  
Rice Production ◽  
Rice Starch ◽  
Drying Rate ◽  
Drying Method ◽  
Safe Storage ◽  
Fluidized Bed Drying

Rice is used as a staple food by more than 60 percent of world population. The method used for Cooking of rice for eating purpose is most common and popular. Rice starch is used in making ice cream, custard powder, puddings, gel, distillation of potable alcohol, etc. It is used in confectionery products like bread, snacks, cookies and biscuits. The defatted bran is also used as cattle feed, organic fertilizer (compost), and medicinal purpose and in wax making. Rice is used as animal feed, fuel, mushroom bed, for mulching in horticultural crops and in preparation of paper and compost. Rice yields have been increasing since the 1960s, but since the 1990s, growth in rice production has been slower than population growth. Indeed, it is anticipated that rice production will need to increase by 30% by 2025 in order to sustain those who need it for sustenance. In the present work fluidized bed drying method used for safe storage of rice and analysis of rice conditions and we find that inlet air temperature has the most important effect on the drying rate of material, increasing the inlet air temperature increases the drying rate of the material. Inlet material flow rate has the most important effect on thermal efficiency. Increasing the inlet material flow rate increases the efficiency but decreases the drying rate. At lower flow rate of material, efficiency is low.

Investigation of Hydrodynamics, Kinetics, Energetic and Exergetic Aspects of Fluidized Bed Drying of Rough Rice

2014 ◽  
Vol 10 (1) ◽  
pp. 39-50 ◽  
Author(s):  
Majid Khanali ◽  
Shahin Rafiee
Keyword(s):  
Fluidized Bed ◽  
Air Temperature ◽  
Initial Moisture Content ◽  
Experimental Conditions ◽  
Fluidization Velocity ◽  
Solid Holdup ◽  
Increase With Increase ◽  
Rough Rice ◽  
Energy And Exergy ◽  
Fluidized Bed Drying

Abstract The hydrodynamics, kinetics as well as energy and exergy analyses of fluidized bed drying of rough rice under various experimental conditions were investigated. Drying experiments were conducted at drying air temperatures of 55, 60, and 70°C, superficial fluidization velocities of 2.3, 2.5, and 2.8 m/s, solid holdups of 0.66 and 1.32 kg, and rough rice initial moisture content of 0.25 d.b. Various popular drying models were used to fit the drying data. It was found that the fluidized bed hydrodynamics of the rough rice was uniform and stable. The drying rate was found to increase with increase in drying air temperature and superficial fluidization velocity, while decreased with increase in solid holdup. Statistical analyses showed that the Midilli et al. model was the best model in describing fluidized bed drying characteristics of the rough rice. The results showed that the values of energy efficiency were higher than the corresponding values of exergy efficiency during the entire drying process. Furthermore, at initial stage of drying, the energy and exergy efficiencies were higher than those at the end of drying. It was also found that both the energy and the exergy efficiencies increased with increasing drying air temperature and solid holdup, whereas decreased with the increase in superficial fluidization velocity.

Comparison of Superheated Steam and Air Fluidized-Bed Drying Characteristics of Victorian Brown Coals

2013 ◽  
Vol 27 (11) ◽  
pp. 6598-6606 ◽  
Author(s):  
David Stokie ◽  
Meng Wai Woo ◽  
Sankar Bhattacharya
Keyword(s):  
Fluidized Bed ◽  
Superheated Steam ◽  
Drying Characteristics ◽  
Brown Coals ◽  
Fluidized Bed Drying

Effect of Fluidized Bed Drying Temperature on Various Quality Attributes of Paddy

2004 ◽  
Vol 22 (7) ◽  
pp. 1731-1754 ◽  
Author(s):  
Supawan Tirawanichakul ◽  
Somkiat Prachayawarakorn ◽  
Warunee Varanyanond ◽  
Patcharee Tungtrakul ◽  
Somchart Soponronnarit
Keyword(s):  
Fluidized Bed ◽  
Quality Attributes ◽  
Drying Temperature ◽  
Fluidized Bed Drying

Experimental Research on Granule Moisture Measurement by Microwave Resonance Technology in a Fluidized Bed Dryer

2013 ◽  
Vol 544 ◽  
pp. 466-470 ◽  
Author(s):  
Yun Hui Xie ◽  
Lan Chen ◽  
Chun Hua Lin ◽  
Song Du
Keyword(s):  
Product Quality ◽  
Real Time ◽  
Fluidized Bed ◽  
Air Temperature ◽  
Flow Rate ◽  
Particle Density ◽  
Infrared Light ◽  
Microwave Resonance ◽  
Fluidized Bed Dryer ◽  
Fluidized Bed Drying

Drying is one of the most important methods for industrial processing while the granule moisture is a critical quality attribute (CQA) which has a significant influence on the finished product quality. In-line measurement of granule moisture during fluidized bed drying is getting more imperative to meet more stringent product quality specifications. Nowadays, several methods have been applied to measuring the granule moisture in-line. Comparing to other methods, microwave resonance (MR) technology provides more representative results due to its independency of both the particle density and the bed density. In the current study, one MR sensor was mounted onto an industrial fluidized bed dryer to monitor the real-time moisture of granules. The drying experiments were performed at different drying air temperatures and flow rates. The comparison between the results of in-line and off-line granule moisture measurements, namely MR technology and loss on drying caused by infrared light (LOD/IR), was presented. Furthermore, the influences of inlet air temperature and flow rate on the performance of the MR sensor were investigated. As a conclusion, the MR method, which is independent of the drying air temperature and flow rate, provided more accurate results when the granule moisture was below 25% (wet basis). Therefore, it is a promising method to be applied in real-time measurement of the granule moisture and predict the end-point in fluidized bed drying processes as well.

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