Abstract
SUMMARYThe main aim of this study is to analyze the solid-liquid extraction followed by spray drying as a technological pathway for utilization of aronia fruit dust, a byproduct of filter tea factory. In the current study, ultrasound-assisted extraction was applied for the production of aronia liquid feed and maltodextrin was used as a carrier and encapsulating agent. In spray drying, the influence of inlet temperature and maltodextrin type and mass fraction on process efficiency and powder properties were observed. The physical and chemical properties of the obtained powders were characterized. It was determined that the powder produced using inlet temperature 140 °C and 40% maltodextrin with dextrose equivalent (DE) 19.7 had the most desirable characteristics. It was observed that the increase in maltodextrin mass fraction decreases the powder moisture content, hygroscopicity and the content of bioactive compounds, but increases water solubility index and particle size. The increase in dextrose equivalent of maltodextrin increases the powder hygroscopicity and water solubility index, while the increase of inlet temperature causes a decrease in moisture content of aronia powders.
Highlights
In recent years, Aronia melanocarpa L. has attracted a great interest due to its unique composition of bioactive compounds, which ensures multiple health-promoting properties [1]
The effect of drying agents was investigated in experiments where three different maltodextrins (MDs: dextrose equivalent (DE) 5.9, 13.1 and 19.7) in three different mass fractions (20, 40 and 60 %) were applied in spray drying of aronia liquid extract (Table 1)
This study was performed in order to investigate the possibility of aronia fruit dust utilization and recycling through application of ultrasound-assisted extraction followed by spray drying
Summary
Aronia melanocarpa L. ( known as aronia or black chokeberry) has attracted a great interest due to its unique composition of bioactive compounds, which ensures multiple health-promoting properties [1]. ( known as aronia or black chokeberry) has attracted a great interest due to its unique composition of bioactive compounds, which ensures multiple health-promoting properties [1]. It was found that aronia is one of the richest sources of phenolic compounds and that the content of proanthocyanidins, anthocyanins and phenolic acids in this fruit is quite high [2]. 25 % of its total phenolic compounds. They consist mainly of cyanidin glycosides: glucoside, galactoside, arabinoside and xyloside, with cyanidin arabinoside and galactoside accounting for 60–75 % of the total anthocyanins [3]. According to the study of Szopa et al [4], aronia berry contains significant amounts of two phenolic acids: chlorogenic and neochlorogenic acid. Positive effects of aronia on human health have been the subject of numerous studies. A few of them showed favourable effects of aronia in the control and prevention of diabetes and diabetes-associated complications [6], prevention and treatment of cardiovascular diseases, treatment of colon cancer and hepatoprotective effect [1,2,7]
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