The Effect of Maltodextrin Concentration and Inlet Air Temperature on Spray Dried Centella Asiatica L. Powder

Azhar, Mohammad Danial; Ibrahim, Ummi Kalthum; Zaki, Nurul Asyikin Md; Hashib, Syafiza Abd

doi:10.1088/1757-899x/736/3/032017

Cited by 2 publications

(1 citation statement)

References 20 publications

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“…The lower moisture content reported for the spray-dried powder could be due to lower feed flow rate (10 ml/min) and higher spray-drying temperature applied (170°C) in their study. Besides, the high moisture content of spray-dried chamomile extract powder could be explained by amorphous nature of modified corn starch and rapid spray-drying process that caused the dried powder to develop into complete amorphous state that tends to absorb high amount of moisture during powder handling process after spray-drying ( Azhar, 2021 ). The higher feed flow rate in spray-drying also led to an increase in moisture content of chamomile extract powder as could be seen in Table 2 .…”

Section: Discussionmentioning

confidence: 99%

Effect of drying methods on yield, physicochemical properties, and total polyphenol content of chamomile extract powder

2022

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Chamomile (Matricaria chamomilla L.) is a traditional medicinal plant used to treat hay fever, inflammation, muscle spasms, menstrual disorders, insomnia ulcers, wounds, gastrointestinal disorders, rheumatic pain, and hemorrhoids. Dried chamomile flowers have a longer shelf life and the dried extract in form of powder offers much flexibility for new therapeutic formulations as it could be used as a replacement for liquid extract and serve as a shelf-stable ingredient in new applications. This study aims to determine the effect of drying methods, i.e., convection oven-drying at 45 °C, freeze-drying at −50°C, and spray-drying at 140°C at 10.5 and 12 ml/min, respectively) on powder yield, physicochemical properties (moisture content, water activity, and color attributes), and total polyphenol content of chamomile extract powder. Our findings showed that spray-drying conducted at 140°C, 12 ml/min resulted in the lowest yield of powder (16.67%) compared to convection oven-drying (90.17%) and freeze-drying (83.24%). Decreasing the feed flow rate to 10.5 ml/min during spraying caused an increase in powder yield to 26.99%. The moisture content of spray-dried chamomile extract powder obtained at 140°C, 10.5 ml/min was higher (11.00%) compared to that of convection oven-dried (8.50%) and freeze-dried (7.50%). Both convection oven-dried and freeze-dried chamomile extract powder displayed no significant difference (p > 0.05) in moisture content. The higher feed flow rate (12 ml/min) in spray-drying also led to an increase in the moisture content of chamomile extract powder to 12.00%. The higher residual moisture found in the spray-dried samples resulted in partial agglomeration of particles. In terms of water activity, freeze-dried chamomile extract powder was found to have the highest water activity (0.63) compared to that of convection oven-dried (0.52), spray-dried at 140°C, 10.5 ml/min (0.57), and spray-dried at 140°C, 12 ml/min (0.58). Spray-dried and freeze-dried chamomile extract powder with high moisture content and water activity could be highly susceptible to microbial growth. In terms of color attributes, higher drying temperature in spray-drying led to darker, redder, and more yellowish chamomile extract powder that could be caused by heat-induced Maillard reaction and caramelization. Since lower drying temperature was used in both convection oven-drying and freeze-drying, both convection oven-dried (56.94 mg GAE/g powder) and freeze-dried chamomile extract powder (55.98 mg GAE/g powder) were found to have higher total polyphenol content compared to those of spray-dried (42.79–46.79 mg GAE/g powder). The present findings allow us to understand the effect of drying methods on the properties of chamomile extract powder and provide a better drying option to dry chamomile extract. Due to higher powder yield with ideal powder properties such as low moisture content and water activity, desirable color, and high total polyphenol content obtained from convection oven-drying, convection oven-drying was a better option than freeze-drying and spray-drying for drying chamomile extract.

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Section: Discussionmentioning

confidence: 99%

Effect of drying methods on yield, physicochemical properties, and total polyphenol content of chamomile extract powder

2022

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Effect of outlet temperature and total soluble solid in 2-stage spray dryer on black tea powder extract production

Krisetyadi

Hermansyah

2021

IOP Conf. Ser.: Earth Environ. Sci.

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The black tea powder extract produced through the spray drying technique is an alternative to tea steeping or brewing in the industry. The production of black tea powder extract using the 2-stage spray dry method still has problems such as different colour, product swelling or inflate and blocking. To determine the source of the problem, this study used varied outlet temperatures 105°C, 110°C, 115°C, 120°C and total soluble solids (TSS) 31.3, 35.2, 37.2, 43.9, 44.1, 47.4. Spraying through 2-stage spray dryer with combi fluid bed and high nozzle pressure atomizer model SC 40 SDX III by Delavan. The results show a significant difference between the outlet chamber temperatures with the flowrates, the pressures, and the densities. An increase in outlet temperatures by a multiple of 10°C can significantly reduce the pressure and the flow rate, while the temperatures multiple of 20°C can significantly reduce the densities, but not for the moisture contents and the powder colours. Changes in the outlet temperatures did not have a 0.2% effect on the steeping colours but were affected by TSS. The higher TSS’s value gives an increase in flow rate, pressure, moisture content and steeped powder colours of 0.2%

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The Effect of Maltodextrin Concentration and Inlet Air Temperature on Spray Dried Centella Asiatica L. Powder

Cited by 2 publications

References 20 publications

Effect of drying methods on yield, physicochemical properties, and total polyphenol content of chamomile extract powder

Effect of drying methods on yield, physicochemical properties, and total polyphenol content of chamomile extract powder

Effect of outlet temperature and total soluble solid in 2-stage spray dryer on black tea powder extract production

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