Navegando por Assunto "Spouted bed"

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Acesso aberto (Open Access)
Análise experimental da secagem do corante hidrossolúvel de urucum (Bixa orellana L.) em leito de jorro
(Universidade Federal do Pará, 2016-02-15) SILVA, Adriano Gomes Paixão da; FARIA, Lênio José Guerreiro de; http://lattes.cnpq.br/7428609361678173; https://orcid.org/0000-0002-9534-9998; COSTA, Cristiane Maria Leal; http://lattes.cnpq.br/0581730621014796
The water-soluble dye annatto norbixin salt is mainly used in the pharmaceuticals industry, cosmetics and especially in industrial food sector in breads, sausages, yogurts, confectionery, pasta, cheese, sandwich cookies, juice concentrates and others. The low toxicity and its coloring ability make the annatto norbixin salt a very attractive and convenient dye, replacing many synthetic dyes. These characteristics encourage to seek ways to facilitate the use of natural dyes in the various segments of industry, as well as promoting research about obtaining in order to get a product with the desired characteristics and qualities. This work it is carried out experimental analysis of water soluble dye drying annatto (Bixa orellana L.) in spouted bed, using cassava starch as a carrier agent and particles of low-density poliestileno (LDPE) as an inert material. The extraction of the dye was carried out by immersion and agitation of annatto seeds in 5% potassium hydroxide solution. It is statistically evaluated the influence of the drying process input variables, temperature (70, 80 and 90 ° C), atomization pressure (10, 15 and 20 psi), and atomization of the suspension flow (10, 7 and 8.5 mL/min) one the response variables: efficiency (η), moisture content (U) and norbixin salt content of the dye powder (S), using Statistica®7.0 application. The estimate of the optimum condition of drying within the analyzed experimental area is determined based on the input variables applying the concept of global desirability. The conditions in this work, it was reached a optimum value of Desirability Function considered as very good and that matches the temperature of the drying air 82.6 °C, atomization pressure of 13.7 psi and flow of suspension dye 10 ml / min, generating satisfactory values for the response variables corresponding to 71.69 % yield, 0.06161 g H2O/g dry solids of moisture and 2.3605 % dye of norbixin salt powder.
Acesso aberto (Open Access)
Nutritional potential of green banana flour obtained by drying in spouted be
(Sociedade Brasileira de Fruticultura, 2013-12) BEZERRA, Carolina Vieira; RODRIGUES, Antonio Manoel da Cruz; AMANTE, Edna Regina; SILVA, Luiza Helena Meller da
This study evaluated the chemical composition of peeled and unpeeled green banana Cavendish (AAA) flour obtained by drying in spouted bed, aiming at adding nutritional value to food products. The bananas were sliced and crushed to obtain a paste and fed to the spouted bed dryer (12 cm height and T = 80 ºC) in order to obtain flour. The flours obtained were subjected to analysis of moisture, protein, ash, carbohydrates, total starch, resistant starch, fiber. The green banana flours, mainly unpeeled, are good sources of fiber and resistant starch with an average of 21.91g/100g and 68.02g/100g respectively. The protein content was found in an average of 4.76g/100g, being classified as a low biological value protein with lysine as the first limiting amino acid. The results showed that unpeeled green banana flour obtained by spouted bed drying can be a valuable tool to add nutritional value to products in order to increase their non-digestible fraction.
Acesso aberto (Open Access)
Obtenção de um produto desidratado a base de jacaiacá (antrocaryon amazonicum(ducke) burtt. & hill) e cará-roxo (dioscorea trifida l.) em leito de jorro
(Universidade Federal do Pará, 2016-10-05) MENDES, Kharen dos Anjos; RODRIGUES, Antonio Manoel da Cruz; http://lattes.cnpq.br/7524720020580309
This study aimed to develop a food supplement powder, from the dehydration of the mix obtained from the pulp of fruits of jacaiacá (Antrocaryon amazonicum (ducke) and of yams-purple tubers (Dioscorea trifida L.).The drying process was carried out in a fluidized dryer, spouted bed type with intermittent feeding. This study evaluated the thermal effects resulting from the drying process on sensory characteristics, nutritional and technological functional properties of the product obtained powder. The temperatures of the drying agent (atmospheric air) used were 70, 80 and 90°C. Assays physical-chemical characterization of bioactive compounds and antioxidant (phenolic compounds, anthocyanins, ascorbic acid, carotenoids, and antioxidants total) were conducted in order to evaluate the heat effects of the drying process. Associated with these assays were also performed tests for physical characteristics of powders (particle size and apparent density and compression), technological properties (Water solubility index WSI and Water absorption index WAI), fluidity, morphological characterization and study of moisture sorption isotherms at 25° C, the mix obtained in spouted bed. The products had moisture and water activity within the safety range (1.49 to 7.83% and from 0.30 to 0.46, respectively) from the microbiological point of view established for dry food. There was no thermal influence on flowability of powders. The product had smaller rest angles 45° and were classified as being free flowing and low apparent density and compression. Regarding color, the powders showed strong tendency to red. The Chroma component (C*) revealed that the mix at 90° C had a higher color intensity compared to the other samples. The powders were classified as very different to ΔE. Products may be considered an excellent source of phenolic compounds (3171.71 to 1296.30 mg GAE/100g) and with remarkable anthocyanin content (47.52 to 38.36 mg/100g d.b) and ascorbic acid (285.61 to 58.09 mg/100g d.b). The powders showed high antioxidant capacity and satisfactory content even after drying (DPPH: 500.16 to 204.16 μmol TE/g d.b and ABTS: 15.66 to 2.52 μmol TE/g d.b). The powder mix showed no uniform particles. The higher mass percentage retained for post at different temperatures were the basis of the equipment (47,04 a 68,61%) and the sieve 60 mesh (250 mm). All products obtained had low solubility at room temperature (20.74 to 21.34%). For the powders of WAI it was observed that at room temperature the starch present in the composition of the post, ungelatinized. Through particle morphology it was possible to distinguish some starch granules with different shapes and sizes (which have the shapes and values). The moisture sorption isotherms indicated that the powder mix should not be dried at lower moisture levels to 4.98 H2O/100 g, and the dried product will have already secured microbiological stability when presenting 12.64g H2O g d.b. humidity. The GAB model was the best fit, with good accuracy for the product moisture sorption isotherms (adsorption: R2: 0.9987 and P: 6.3079,% and desorption: R2: 0.9997 and P: 1,85%).
Acesso aberto (Open Access)
Uso combinado de técnicas não convencionais na recuperação de astaxantina do coproduto gerado no processamento de camarão-rosa (farfantepenaeus subtilis)
(Universidade Federal do Pará, 2021-08-31) SILVA, Aline Kazumi Nakata da; RODRIGUES, Antonio Manoel da Cruz; http://lattes.cnpq.br/7524720020580309
The large amount of co-products generated in the production chain of shrimp processing has created a discussion about their use for the manufacture of high-added value ingredients. Regarding this subject, the use is both an attempt to minimize the pollution caused by the inadequate disposal of industrial waste in nature, and a way to generate income through the extraction of substances of economic interest. For this, knowing the amount of carotenoids and polyunsaturated fatty acids of the pink shrimp (Farfantepenaeus subtilis), which is the main species of marine shrimp produced by capture fisheries in the state of Pará, is essential since it is recognized as a source of these substances by the specialized literature. In the present work, two ways of using the pink shrimp co-product were studied, the first through drying in a spouted fluidized bed and the second through the extraction of the astaxanthin (ASX) carotenoid through enzymatic hydrolysis combined with ultrasound-assisted extraction (UAE). For drying the co-product, the spouted bed is a good alternative due to its low operating cost and high efficiency in removing moisture from the material. The co-product (pink shrimp cephalothorax) was ground in a food processor and then dehydrated at temperatures of 70, 80 and 90 °C, and later, conducted to an ASX extraction step using palm olein as a solvent at temperatures of 50, 60 and 70 °C. In carrying out the ASX extraction with enzymatic hydrolysis and UAE, the effects of the enzyme type (alcalase, flavourzyme and a mixture of alcalase and flavourzyme in a ratio of 1:1, v/v), enzyme concentration (0.2; 0.4; 0.6 and 0.8 % relative to the sample mass) and hydrolysis time (0, 60, 90 and 120 minutes). Alcalase was the most efficient enzyme, whose action culminated in the extraction of almost 70 % of the relative content of ASX of the sample. The ASX content was significantly and positively affected by the enzyme concentration (p<0.05) for all the enzymes, but the hydrolysis time was only partially significant.