Chapter 5Dehydration: Spray Drying—Freeze Drying

2015 ◽  
pp. 180-245
Keyword(s):  
Spray Drying ◽  
Freeze Drying

Optimising Conditions for Encapsulation of Salacia chinensis Root Extract enriched with Phenolic Compounds

2021 ◽  
Vol 02 ◽  
Author(s):  
Thanh V. Ngo ◽  
Christopher J. Scarlett ◽  
Michael C. Bowyer ◽  
Rebecca McCullum ◽  
Quan V. Vuong
Keyword(s):  
Antioxidant Activity ◽  
Spray Drying ◽  
Feed Rate ◽  
Freeze Drying ◽  
Antioxidant Activities ◽  
Inlet Temperature ◽  
Root Extract ◽  
Optimal Conditions ◽  
Dried Extract ◽  
Drying Conditions

Background: S. chinensis extract contains bioactive compounds, which exhibit high antioxidant activities. However, for commercial uses, it is necessary to encapsulate the extract to protect it from degradation. Objective: This study aimed to optimise spray-drying conditions and then compare with freeze-drying to identify the most suitable conditions for encapsulation of Salacia chinensis L. root extract. Method: Three factors of spray-drying encapsulation, including maltodextrin concentration, inlet temperature and feed rate, have been tested for the impacts on the physical and phytochemical properties of S. chinensis root extract. Based on the optimal conditions, the spray-drying was then compared with freeze-drying. Results: The results showed that maltodextrin concentration, inlet temperature and feed rate had significant impacts on recovery yield, phenolics, mangiferin and antioxidant activity of the spray-dried extract. The optimal spray-drying encapsulation conditions were maltodextrin concentration of 20 %, inlet temperature of 130ºC and feed rate of 9 mL/min. Under these optimal conditions, the encapsulated extract had comparable solubility, total phenolics, mangiferin, and antioxidant activity, lower bulk density, moisture content, and water activity as compared to encapsulated extract made using the freeze-drying technique. These optimal spray-drying conditions are recommended to encapsulate the extract of S. chinensis root. Conclusion: Spray-drying was found to be more effective for encapsulation of S. chinensis root extract than freeze-drying. Therefore, spray-drying is recommended for further applications.

scholarly journals Comparison between freeze and spray drying to obtain powder Rubrivivax gelatinosus biomass

2013 ◽  
Vol 33 (1) ◽  
pp. 47-51 ◽  
Author(s):  
Edson Francisco do Espírito Santo ◽  
Leandro Kanamaru Franco de Lima ◽  
Ane Pamela Capucci Torres ◽  
Gabriela de Oliveira ◽  
Elisa Helena Giglio Ponsano
Keyword(s):  
Spray Drying ◽  
Freeze Drying ◽  
Bacterial Biomass ◽  
Quality Criterion ◽  
Industrial Effluents ◽  
Product Recovery ◽  
Animal Origin ◽  
Freeze Dried ◽  
Rubrivivax Gelatinosus ◽  
Industry Effluent

The use of colorants in products of animal origin is justified by the improvement in the color of foods since this attribute is considered a quality criterion. These additives can be produced using industrial effluents as substrates and appropriate organisms, such as Rubrivivax gelatinosus. Oxycarotenoids represent a class of carotenes responsible for the pigmentation of animals and vegetables. R. gelatinosus grows in fish industry effluent with the resulting production of a bacterial biomass containing oxycarotenoids. The purpose of this study was to compare the use of two drying processes - spray and freeze drying - to obtain powder biomass in terms of the process parameters (yield, productivity, and product recovery) and the product characteristics (color, proximate composition, and oxycarotenoids). No difference was detected in the yield between these techniques, while productivity was higher using spray drying. Higher product recovery and moisture were achieved with freeze drying, while ash was higher with spray drying. The freeze dried biomass was redder, darker and less saturated than the spray dried biomass. No difference in oxycarotenoids was detected between the biomasses. Although it results in lower recovery rate, spray drying was faster and more productive, and it provided the same yield as freeze drying, which makes it the method of choice for obtaining R. gelatinosus biomass.

scholarly journals Characterization of Inclusion Complex of Croton zehntneri Essential Oil and β-Cyclodextrin Prepared by Spray Drying and Freeze Drying

2019 ◽  
Vol 11 (2) ◽  
pp. 529-542 ◽  
Author(s):  
Lorenna Fonseca ◽  
Marcio dos S. Rocha ◽  
Larisse C. F. Brito ◽  
Edymilaís S. Sousa ◽  
Fernanda S. Reinaldo ◽  
...  
Keyword(s):  
Essential Oil ◽  
Inclusion Complex ◽  
Spray Drying ◽  
Freeze Drying

scholarly journals Effect of Thermal Processing on Antioxidant Activity and Cytotoxicity of Waste Potato Juice

2019 ◽  
Vol 14 (1) ◽  
pp. 150-157 ◽  
Author(s):  
Przemysław Łukasz Kowalczewski ◽  
Anna Olejnik ◽  
Wojciech Białas ◽  
Piotr Kubiak ◽  
Aleksander Siger ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Low Temperature ◽  
Cytotoxic Activity ◽  
Spray Drying ◽  
Cell Lines ◽  
Freeze Drying ◽  
Cytotoxic Activities ◽  
Normal Cells ◽  
Stabilization Methods ◽  
The Impact

AbstractPotato juice (PJ), commonly considered a burdensome waste, is rich in various compounds with bioactive properties. It has long been considered a remedy for gastric problems in traditional folk medicine. If valorization of PJ through implementation in the production of functional foods is to be considered, stabilization methods must be developed to allow long-term storage of this seasonal product. It is important that such methods are chosen with regard to their effect on the bioactive value of the obtained product. In this study, the impact of four stabilization methods on the antioxidant and cytotoxic activities of PJ was investigated. Elevated temperatures were used in thermal deproteinization used to obtain DPJW (deproteinated potato juice water) and spray-drying of FPJ (fresh potato juice) that resulted in SDPJ. Freeze drying and cryoconcentration were the low temperature processing methods that yielded PJL (potato juice lyophilisate) and CPJ (cryocorncentrated potato juice), respectively. All processed materials were characterized chemically and compared with raw materials in terms of phenolic compounds content, antioxidant activity as well as cytotoxicity to human tumor cells isolated from the gastric mucosa (Hs476T cell line), colon (Caco-2 and HT-29 cell lines), and normal cells isolated from the small intestine and colon epithelium (IEC-6 and NCM460 cell lines). It was stated that high-temperature processes – thermal deproteinization and spray-drying – yielded products with increased antioxidant potential (TEAC) that also showed increased cytotoxic activity towards intestinal cancer cells. At the same time the cytotoxicity towards normal cells remained on par with that of fresh PJ (IEC-6 cells) or decreased (NCM460 cells). Thermal deproteinization significantly decreased the content of glycoalcaloids in the juice, while spray drying did not have such an effect. The two low-temperature processes investigated – cryoconcentration and freeze drying – did not affect the PJ cytotoxic activity towards any of the cell lines used in the tests, whereas they did affect the antioxidant properties and glycoalcaloids content of PJ.

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