Production of Dry Extracts of Medicinal Brazilian Plants by Spouted Bed Process

Runha, F.P.; Cordeiro, Daniela; Pereira, Caroline Figueira; Vilegas, Janete Harumi Yariwake; Oliveira, Wanderley Pereira de

doi:10.1205/096030801750425253

Cited by 18 publications

(4 citation statements)

References 7 publications

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“…Table presents the variables and ranges studied, where T ge is the inlet drying gas temperature, W s / W max , the feed flow rate of the feed composition relative to the maximum dryer evaporation capacity, Adj is the percentage of drying carrier in the feed, and SiO 2 is the percentage of colloidal silicon dioxide present in the carrier mixture. The ranges of variables studied were based on previous studies of our group . The criterions used in the definition of the work ranges should consider not only the system performance (e.g.…”

Section: Methodsmentioning

confidence: 99%

“…Although several studies concerning the spouted bed drying of herbal extracts have been reported in recent literature, the industrial use of this technology is still demanding, mainly due to the absence of predictive models to describe system performance and changes in product properties due to processing conditions, associated with the complex nature of bioproducts. Consequently, in most situations, the addition of drying aids such as corn, cassava, rice and modified starches, maltodextrins, colloidal silicon dioxide, arabic gum, microcrystalline cellulose and cyclodextrins becomes compulsory in order to improve system performance and product quality …”

Section: Introductionmentioning

confidence: 99%

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Quality changes during spouted bed drying of Pepper‐Rosmarin extract

2013

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This study was undertaken in order to evaluate the effects of processing and feed composition variables on the retention of volatile compounds and product properties during spouted bed drying of pepper‐rosmarin extract (Lippia sidoides Cham.). The product loss on drying, LD, moisture content, Xp, water activity, Aw, concentration of bioactive markers (flavonoid, TF, polyphenol, TPF and thymol contents, TT), antioxidant activity, IC50, powder flow properties, powder morphology and crystalline state were the responses analysed. Processing conditions and feed composition significantly affected the product quality, leading to noticeable changes in the retention of bioactive substances. Results of this study show that the concentration of bioactive markers in the dried product tended to increase with the feed flow rate of the feed composition relative to the maximum dryer evaporation capacity, Ws/Wmax, and conversely with the concentration of drying carriers added to the feed composition. The dried extract showed significant antioxidant activity, although significant losses of bioactive marker compounds (TF, TPF and TT) were observed in some processing conditions.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quality changes during spouted bed drying of Pepper‐Rosmarin extract

2013

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“…Runha and colleagues [33] studied the development of a spouted bed to produce dry extracts of medicinal Brazilian plants. The plants used for the experiment were Passiflora edulis and Passiflora alata, and, in particular, the leaves from which the desired compounds were extracted.…”

Section: Dryingmentioning

confidence: 99%

Review of Experimental Activities and Recent Developments of Spouted Bed Reactors at Different Operational Scales

Carozzo,

Arato,

Moliner

2024

Energies

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Recent research advances and technological developments of spouted bed reactors (SBRs) have been discussed in this work. SBR has aroused increasing interest since their invention in 1955 due to its flexibility in processing different feedstocks and the high process yields that can be achieved due to its characteristic fluid dynamics. However, even though highly satisfactory results have been obtained at the laboratory scale for different applications (i.e., drying or thermochemical reactions, among others), their full implementation at an industrial level is still scarce, mainly due to the challenges encountered for their scale-up. In this work, an initial short description of SBR and configurations is followed by a review of the main experimental activities that have been conducted at different scales in the period 2013–2023. Advanced solutions such as multi-unit reactors and the use of rectangular geometries instead of the classical cylindrical ones have arisen as potential areas for further study and development to achieve a reliable implementation of the spouted bed technology at an industrial scale.

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“…Drying techniques, including spray drying (SD), freeze-drying, and fluidized beds, have been commonly used in the production of dry powders including herbal extracts [17][18][19], with spray drying being particularly used in herbal processing industries [20]. Various studies reported in literature focus on the search of alternative and innovative drying methods for herbal extracts drying, such as the spouted bed technology (SB).…”

Section: Introductionmentioning

confidence: 99%

Spouted Bed Dried Rosmarinus officinalis Extract: A Novel Approach for Physicochemical Properties and Antioxidant Activity

et al. 2020

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In this study, a conical-cylindrical spouted bed dryer with Teflon® beads as spouting material was used for producing powdered rosemary (Rosmarinus officinalis L.) extract. The influence of the inlet drying gas temperature (Tgi) and the percentage ratio between the feed rate of concentrated liquid extract by the maximum evaporation capacity of the spouted bed (Ws/Wmax) on selected physicochemical properties of the finished products were investigated. Antioxidant properties of the concentrated liquid extract and dried extracts were also evaluated by the 2.2-diphenyl-1-picrylhydrazyl radical scavenging (DPPH) and lipid peroxidation induced by Fe2+/citrate (LPO) methods; and compared with the values obtained for a lyophilized extract (used as a control). Colloidal silicon dioxide (Tixosil® 333) and maltodextrin (DE 14) at a 2:1 ratio was added to the concentrated extract before drying (4.4% w/w) to improve the drying performance. The drying variables Ws/Wmax and Tgi have statistically significant influence on total polyphenols and total flavonoid contents of the dried powders. The concentrated extract (on dry basis—being absolute solid content) showed superior antioxidant activity (AA) compared to both the spouted bed dried and the lyophilized extracts; exhibiting IC50 values of 0.96 ± 0.02, 2.16 ± 0.04 and 3.79 ± 0.05 µg mL−1 (DPPH method) and 0.22 ± 0.01, 1.31± 0.01 and 2.54 ± 0.02 µg mL−1 (LPO method), respectively. These results of AA are comparable to values obtained for quercetin, a flavonoid compound often used as a reference standard due to its potent antioxidant activity; with IC50 of 1.17 µg mL−1 (DPPH) and 0.22 µg mL−1 (LPO). However, the dried rosemary extracts are about 13.5 times more concentrated than the initial concentrated extract (dry weight), with a concentration of total flavonoids and polyphenols compounds ranging from 4.3 to 12.3 and from 1.2 to 4.7 times higher than the concentrated extract values (wet basis). The AA per dry product mass was thus significantly higher than the values measured for concentrated extractive solution, irrespective of some losses of AA apparently due to the drying process.

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Production of Dry Extracts of Medicinal Brazilian Plants by Spouted Bed Process

Cited by 18 publications

References 7 publications

Quality changes during spouted bed drying of Pepper‐Rosmarin extract

Quality changes during spouted bed drying of Pepper‐Rosmarin extract

Review of Experimental Activities and Recent Developments of Spouted Bed Reactors at Different Operational Scales

Spouted Bed Dried Rosmarinus officinalis Extract: A Novel Approach for Physicochemical Properties and Antioxidant Activity

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