Effect of infrared‐assisted spouted bed drying of flaxseed on the quality characteristics of its oil extracted by different methods

Abstract

BACKGROUND: Infrared (IR)-assisted spouted bed drying (SBD) has emerged as a potential alternative to the traditional hot air drying for heat sensitive components. The aim of this study was to investigate effect of IR-assisted SBD and application of cold press (CP), solvent extraction (SE) and ultrasound assisted extraction (UAE) on the quality of flaxseed oil. SBD and IR-assisted SBD were performed at air temperatures of 40, 60, 80 ∘ C and their effects on the drying rate, fatty acids composition and oil peroxide and acid values were evaluated. Quality of oil extracted from the dried flaxseeds by CP, SE and UAE methods was then evaluated.RESULTS: Increasing air temperature in the presence of IR increased the drying rate. The peroxide values (PVs) of IR-SBD samples were higher than those of SBD at the same temperature. IR treatment did not notably change the composition of fatty acids in flaxseed oil, except in linoleic acid content. UAE gave higher extraction yield than CP and SE methods. UAE yielded an oil with higher percentage of saturated fatty acids, whereas the percentage of omega-3 and omega-6 fatty acids was higher in the CP method. The oil extracted by CP exhibited lower levels of PV (0.516 meq O 2 /kg oil) and acid value (1.36%), as compared to oils extracted by SE and UAE methods. CONCLUSION: Both UAE and conventional methods did not significantly influence the composition of fatty acids in the extracted oils. Nonetheless, the CP method yielded an oil with a high percentage of omega-3 and omega-6 fatty acids. Oil extractionCold press extraction A mechanical screw press (Barad Eng. Group, D50 Model, Isfahan, Iran) was employed to press out the flaxseeds in one go, thereby grinding the seeds.

Efficient Production of Dried Whole Peanut Fruits Based on Infrared Assisted Spouted Bed Drying

“…The inlet airflow speed was detected by a wind velocity sensor (KA25, Shenyang KANO Scientific Instrument Co., LTD., Shenyang, China).The drying temperature, and inlet wind speed were set as 70 ± 0.5 • C and 16 m/s, respectively. During the drying process, aluminum beads were used as inert materials to increase heat transfer in the spouted bed dryer (SBD).The beads had a mean diameter of 15 mm and a round shape, and they weighed 1000 g [12]. The sample weights were recorded every 30 min during the early stage and then every 60 min during in the later stage until reaching the final moisture content was reached.…”

Physical, mechanical, and antibacterial characteristics of bio‐nanocomposite films loaded with Ag‐modified SiO2 and TiO2 nanoparticles

“…The importance of using NPs as fillers is not only improving the mechanical properties of the resulting films, but also increasing the compatibility between mixed components (Angelova, Rangelova, Dineva, Georgieva, & Müller, 2014; Beigmohammadi et al., 2016). Besides, nano‐fillers can be regarded as carriers of active ingredients, such as bactericide and antioxidant substances in preserving the quality of food (Dehghan‐Manshadi, Peighambardoust, Azadmard‐Damirchi, & Niakousari, 2019, 2020). Currently, different NPs including Ag, nanoclays, ZnO, TiO 2 , SiO 2 , nanotubes of carbon, cellulose nano‐whiskers, and starch nanocrystals are used as nano‐fillers to improve the properties of packaging materials (Dehghani, Peighambardoust, Peighambardoust, Hosseini, & Regenstein, 2019; Manjunath et al., 2018; Nottagh, Hesari, Peighambardoust, Rezaei‐Mokarram, & Jafarizadeh‐Malmiri, 2018, 2019; S. H. Peighambardoust, Beigmohammadi, & Peighambardoust, 2016; Thangavel & Thiruvengadam, 2014; Yao et al., 2011).…”

Static and dynamic properties of decane/water microemulsions stabilized by cetylpyridinium chloride cationic surfactant and octanol cosurfactant

“…Microemulsions possess interesting physicochemical properties, thermodynamic stability, low interfacial tension, low viscosity, transparency, and high solubilization power. [1][2][3] From an industrial viewpoint, microemulsions have a simple and lowcost preparation process. The properties of microemulsions make them useful for transdermal drug delivery; 4,5 they can provide rapid drug release due to the large interfacial area and this improves the efficacy of the drug.…”