无籽刺梨粉喷雾干燥工艺优化

为改善刺梨粉喷雾干燥效果,优化喷雾干燥工艺,研究进风温度、进料流量、进料浓度、麦芽糊精添加量对喷雾干燥的影响,分析喷雾干燥条件对刺梨粉产率、含水率和VC含量的影响,并采用正交试验优化喷雾干燥条件。结果表明,进风温度190℃,进料流量6 mL/min,进料浓度25%,麦芽糊精添加量40%条件下,刺梨粉产率57.51%,VC 3 901 mg/100 g,含水率3.86%。研究结果可用于指导高质量无籽刺梨粉的生产,为无籽刺梨综合利用提供参考。     

慈姑粉的喷雾干燥工艺优化

以慈姑酶解液为原料,研究助干剂对慈姑出粉率的影响,在最优助干剂添加量的基础上,以出粉率、含水量及感官评分为评价指标,优化喷雾干燥过程中进风温度、进料流量和热空气流量参数,确定最佳干燥工艺条件。结果表明:在麦芽糊精添加量为40%,进风温度为180 ℃,进料流量为25%,热空气流量为36 m3/h时,慈姑出粉率最高,达48.51%±0.63%,比不添加助干剂的出粉率高出31.32%,含水量为4.86%±0.07%,慈姑粉为乳白色,粉粒细小均匀,风味浓厚,冲调性好,感官性状最佳。采用助干剂协同喷雾干燥技术制备慈姑粉能显著提高出粉率,改善慈姑粉品质。     

刺梨果汁喷雾干燥制粉工艺优化

为研究刺梨果汁喷雾干燥过程中各工艺参数对刺梨品质的影响,获得刺梨果汁喷雾干燥制粉最佳工艺。本试验以刺梨果汁为原料,选择进风温度、进料浓度、进料流量和进风流量为工艺参数进行单因素试验,在单因素试验的基础上,以集粉率、Vc含量、黄酮含量及模糊数学综合评分为响应值,利用Box-Behnken中心组合方法对喷雾干燥参数条件进行响应面实验设计。结果显示喷雾干燥法制备刺梨果粉最优参数为：进风温度179 ℃,进料浓度5.9%,进料流量0.3 L/h,进风流量30 m3/h,此条件下得到刺梨果汁喷雾干燥集粉率为30.45%,Vc含量753.96 mg/100 g,黄酮含量277.70 mg/100 g,感官值85.95分,与响应面模型预测值符合;所获得的刺梨果粉粉质均匀、光泽明亮、具有典型的刺梨香气。本研究结果可作为提升刺梨喷雾干燥技术及开发新型刺梨产品的理论依据。     

黑大蒜粉喷雾干燥工艺条件研究

为采用喷雾干燥方法制备黑大蒜粉,在单因素实验的基础上,采用正交实验对影响黑大蒜粉制备质量的进风温度、进料流量、黑蒜液可溶性固形物含量、β-环糊精添加量进行了研究,得到最佳工艺条件:进风温度210℃,进料流量28 mL/min,黑蒜液可溶性固形物含量18％,β-环糊精量6％.该条件下制备的黑蒜粉溶解性好、香味浓,干燥过程中不粘壁.     

喷雾干燥法制备武夷岩茶速溶茶粉的工艺研究

以回收利用武夷岩茶下脚料和丰富茶产品市场作为宗旨,将武夷岩茶茶梗提取的茶汤作为原料,采用喷雾干燥法制备速溶茶粉。以茶粉得率为考察指标,采用单因素实验和正交试验相结合,对喷雾干燥的进料口温度、进料流量和茶汤中可溶性固形物含量三因素进行工艺参数的优化,并做成品质量检验。结果表明:进料口温度150℃、进料流量3.0L/h及茶汤中可溶性固形物含量18%,为喷雾干燥的最适工艺条件。在此工艺下制备岩茶茶粉,得率为16.93%,且成品质量符合相关标准的要求。     

西瓜胡萝卜复合速溶果蔬粉的喷雾干燥工艺研究

为了改善西瓜胡萝卜复合速溶果蔬粉的喷雾干燥效果,优化其喷雾干燥工艺,试验考察了西瓜和胡萝卜配比、物料含量、麦芽糊精添加量、β-环糊精添加量、进料量、进料温度、进口热风温度的变化对西瓜胡萝卜复合速溶果蔬粉喷雾干燥效果的影响,并采用正交设计法优化喷雾干燥条件。结果表明,喷雾干燥最佳工艺条件为西瓜和胡萝卜质量比为1.5∶1,物料含量20%,麦芽糊精添加量10%,β-环糊精添加量0.7%,进料量15mL/min,进料温度35℃,进口热风温度190℃,在此条件下,所得产品的感官评分为9.4分,水分含量为3.92%。     

喷雾干燥法制备葡萄籽粕蛋白粉的工艺研究

采用喷雾干燥法对葡萄籽粕蛋白提取液进行干燥,以集粉率、蛋白质分散系数(PDI)及含水量为评价指标,研究了进风流量,进料流量,进风温度,雾化压力对干燥效果的影响,并在此基础上结合均匀设计法优化干燥条件。得出最佳干燥条件为:进风流量0.65 m3/min,进风温度180℃,进料流量400 m L/h,雾化压力200 k Pa,各项指标为:集粉率45.43%,PDI为73.1%,含水量1.03%。     

活性乳酸菌酸奶粉加工关键技术研究

建立活性乳酸菌酸奶粉加工技术参数。新鲜牛乳经过发酵后得出最佳乳酸菌活性产品,首先使用单因素试验法选择最佳酸奶粉喷雾干燥参数,再采用响应面法对所得试验结果进行系统的优化,从而选定最佳发酵工艺条件如下:进风温度149.2℃、出风温度70.5℃、干物质含量35.8%、进料流量10.6 mL/min。该工艺条件下生产的产品活菌数较高,感官品质优良。     

响应面试验优化酶解辅助喷雾干燥制备怀山药粉工艺

为获取溶解性和冲调性较好的怀山药粉,改善怀山药粉的喷雾干燥效果,以普通怀山药为原料,采用酶解辅助喷雾干燥的方法制备怀山药粉,并用响应面法优化酶解液的喷雾干燥条件。分析热风温度、热风流量、进料流量的变化情况对怀山药出粉率的影响规律,并对怀山药粉的基本成分含量及特性指标进行测定。结果表明：在α-淀粉酶添加量0.2%、温度70 ℃、pH 7.0、酶解时间45 min的条件下,怀山药中可溶性固形物得率达82.79%,当酶解液真空浓缩至质量分数17%时,对其进行喷雾干燥,在热风温度180 ℃、热风流量28.60 m3/h、进料流量1 060 mL/h条件下,怀山药出粉率最高达到37.59%,且制得怀山药粉冲调性好,色泽风味佳,含水率小于5%,适于长期贮存。因此,酶解与喷雾干燥相结合的方法制得怀山药粉品质较优。     

枇杷叶速溶粉制备工艺优化及其性能研究

为采用喷雾干燥制备速溶枇杷叶粉,采用正交实验对影响溶解度的进风温度、进料流量、枇杷叶提取物固形物含量、β-环糊精添加量进行研究,并对喷雾干燥制备的枇杷叶粉的特性进行研究。结果表明:喷雾干燥制备枇杷叶速溶粉的最佳工艺条件为:进风温度210℃、进料流量28mL/min、固形物含量23%、β-环糊精量5%。该条件下制备的速溶粉,粒度(D90)=232.5±2.1μm,总三萜、总黄酮含量分别达到15.52±1.53mg/kg、9.02±1.13mg/kg,溶解性达到(3.1±0.1)s,表明喷雾干燥是速溶枇杷叶粉制备的适宜方法。     

黄刺玫果粉喷雾干燥工艺优化及物性检测

用响应面法对黄刺玫果粉的喷雾干燥工艺进行优化并对果粉指标进行检测。以果粉得率、多酚含量为主要考察指标,在单因素实验的基础上,采用响应面法对黄刺玫果粉喷雾干燥的进料速度、出口风速、料液浓度主要因素进行考察。结果表明:采用响应面法建立的模型具有显著性意义,在本实验条件下,影响果粉得率的主要因素依次为:进料速度>出口风速>料液浓度。各因素最佳参数为:进料速度6.0 mL/min、出口风速4.0 m/s、料液浓度60%。果粉得率77.5%,与预测值78.6%的偏差为1.4%;实验所得黄刺玫果粉粒度均一细腻,粒径7.71 μm,色泽粉紫,口味酸甜,具有黄刺玫果特有的香味和良好的水溶性。多酚含量为36.62 mg/g,含水率小于5.0%。结论:喷雾干燥法是制备黄刺玫果粉理想的一种干燥方法。     

基于响应面分析法的小球藻藻粉喷雾干燥工艺优化

以小球藻藻粉得率为主要目标,选取进料浓度、进风温度和进料速度三个因素进行中心组合实验(Box-Benhnken),通过响应面分析法对小球藻藻粉干燥工艺进行优化研究。利用Design Expert软件,得到了小球藻粉最佳的喷雾干燥条件:进风温度200℃,进料浓度77.8g/L,进料速度100mL/h。在此工艺条件下,喷雾干燥所得的藻粉得率最高,其最大得率理论值为48.18%,与实测值47.20%基本一致。     

A Critical Review on the Spray Drying of Fruit Extract: Effect of Additives on Physicochemical Properties

Spray drying accomplishes drying while particles are suspended in the air and is one method in the family of suspended particle processing systems, along with fluid-bed drying, flash drying, spray granulation, spray agglomeration, spray reaction, spray cooling, and spray absorption. This drying process is unique because it involves both particle formation and drying. The present paper reviews spray drying of fruit extracts, such as acai, acerola pomace, gac, mango, orange, cactus pear, opuntia stricta fruit, watermelon, and durian, and the effects of additives on physicochemical properties such as antioxidant activity, total carotenoid content, lycopene and β-carotene content, hygroscopy, moisture content, volatile retention, stickiness, color, solubility, glass transition temperature, bulk density, rehydration, caking, appearance under electron microscopy, and X-ray powder diffraction. The literature clearly demonstrates that the effect of additives and encapsulation play a vital role in determining the physicochemical properties of fruit extract powder. The technical difficulties in spray drying of fruit extracts can be overcome by modifying the spray dryer design. It also reveals that spray drying is a novel technology for converting fruit extract into powder form.     

Influence of process conditions on the physicochemical properties of açai (Euterpe oleraceae Mart.) powder produced by spray drying

The objective of this work was to study the influence of spray drying conditions on the physicochemical properties of açai powder. The process was carried out on a mini spray dryer and maltodextrin 10DE was used as carrier agent. Seventeen tests were made, according to a central composite design. Independent variables were: inlet air temperature (138–202 °C), feed flow rate (5–25 g/min) and maltodextrin concentration (10–30%). Moisture content, hygroscopicity, process yield and anthocyanin retention were analysed as responses. Powder moisture content and process yield were positively affected by inlet air temperature and negatively affected by feed flow rate, which are directly related to heat and mass transfer. Process yield was also negatively influenced by maltodextrin concentration, due to the increase on mixture viscosity. Powders hygroscopicity decreased with increasing maltodextrin concentration, decreasing temperature and increasing feed flow rate. Powders with lower moisture content were more hygroscopic, which is related to the greater water concentration gradient between the product and the surrounding air. Anthocyanin retention was only affected by temperature, due to its high sensitivity. In respect to morphology, the particles produced at higher temperature were larger and a great number of them showed smooth surface.     

Spray Drying of Fruit and Vegetable Juices—A Review

The main cause of spray drying is to increase the shelf life and easy handling of juices. In the present paper, the studies carried out so far on spray drying of various fruits and vegetables are reported. The major fruit juices dried are mango, banana, orange, guava, bayberry, watermelon, pineapple, etc. However, study on vegetable juices is limited. In spray drying, the major optimized parameters are inlet air temperature, relative humidity of air, outlet air temperature, and atomizer speed that are given for a particular study. The juices in spray drying require addition of drying agents that include matlodextrin, liquid glucose, etc. The drying agents are added to increase the glass transition temperature. Different approaches for spray dryer design have also been discussed in the present work.     

响应面试验优化喷雾干燥制备核桃分心木速溶粉及其冲调性分析

以核桃分心木为原料,从分心木速溶粉冲调性的角度出发,采用单因素试验研究喷雾干燥进风口温度、进料流量及热风流量对核桃分心木速溶粉润湿性、分散性、水分含量及颗粒大小的影响,并选择进风口温度、进料速率、热风流量3 个因素,以润湿时间及分散时间为响应值进行响应面优化试验。喷雾干燥制备核桃分心木速溶粉的最优参数为进风口温度170 ℃、进料流量1.8 L/h、热风流量35 m3/h。采用上述实际操作参数重新制作核桃分心木速溶粉样品进行实验,实际测得润湿时间为13.2 s,分散时间为5.8 s,与模型预测值相符。     

Optimisation of a pilot‐scale spray drying process for probiotic yoghurt,using response surface methodology

The influence of drying air temperatures, drying air flow rate and feed flow rate on percentage survival rate (% SR) of starter and probiotic bacteria, moisture content, water activity and colour of probiotic yoghurt powder produced using a pilot‐scale spray dryer was investigated. Optimisation of spray drying conditions was achieved based on the desirability value. Results showed that inlet air temperature, drying air flow rate, feed flow rate and outlet air temperature of 150 °C, 478 m³/h, 2 L/h and 63.3 °C, respectively, were optimal conditions to produce powder that meets quality specifications and with a satisfactory% SR.     

正交试验优化喷雾干燥法制备玛咖精粉工艺

以玛咖块根为原料,经过醇提、浓缩后采用喷雾干燥法制备玛咖精粉,对进料液固形物质量分数、进风温度和热风流速3 个因素进行单因素和正交试验分析,结果表明：进料液固形物质量分数5%、进风温度120 ℃和热风流速0.4 m3/min时制得的玛咖精粉质量最佳,此时玛咖精粉水分含量为21.2 mg/g（含水率2.12%）,生物碱含量为15.87 mg/g,水溶性蛋白质含量为1.64 mg/g,VC含量为6.03 mg/g,总糖含量为554.50 mg/g。对优化条件下得到的玛咖精粉超微结构、吸湿性的实验研究表明,优化后的喷雾干燥工艺使得玛咖中的有效成分得以保留,所制备的玛咖精粉可作为玛咖深加工产品的优良原料。