喷雾干燥制备枸杞粉工艺研究

以枸杞酱为原料,通过喷雾干燥制备枸杞粉,采用单因素和正交试验相结合确定最佳工艺。试验结果表明,当麦芽糊精添加量为50％、固形物浓度为8％、进风温度为180℃、出风温度为80℃时,喷雾干燥效果最好,在此条件下喷雾制备枸杞粉的出粉率为29．1％。     

海藻糖对保加利亚乳杆菌保护应用的研究

本文考察了不同工艺过程包括冷藏，冷冻，真空干燥，冷冻干燥以及喷雾干燥和室温下保存过程中不同保护剂对保护利亚乳杆菌存活性和产酸率的影响。结果发现，海藻糖具有最好的抗冷冻，抗脱水效果。浓度试验表明，海藻糖的最达添加量为5％－10％（w/v)。     

助干剂对山药喷雾干燥工艺的影响

以新鲜山药为主要原料,探究不同助干剂的添加量对喷雾干燥山药粉集粉率和水分含量的影响。采用单因素试验分别考察麦芽糊精、β-环糊精和阿拉伯胶的添加量对山药喷雾干燥效果的影响。在此基础上,利用正交试验确定最佳的工艺条件。结果显示,麦芽糊精、β-环糊精和阿拉伯胶添加量分别为50%、10%和1.0%时对山药的喷雾干燥效果最好,山药粉集粉率高达36.25%,水分含量为5.49%。     

壳聚糖对茶皂素水溶液絮凝工艺的研究

以壳聚糖为絮凝剂,研究了茶皂素水溶液的絮凝工艺,考察了壳聚糖加入量、助剂加入量和絮凝时间对絮凝效果的影响。通过正交试验得出最佳絮凝条件为：壳聚糖加入量5mL、助剂加入量5mL、絮凝时间4h。在最佳条件下验证试验,杂质去除率为34．33％,茶皂素损失率为5．64％。     

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%。     

新型粉末油脂的制备

以麦芽糊精和阿拉伯胶为壁材,椰子油和菜籽油为芯材,并加入聚甘油酯和酪蛋白酸钠(SC),采用喷雾干燥法研究了新型粉末油脂的制备,采用正交试验优化了最佳配方,并确定了最佳的喷雾干燥条件.结果表明:喷雾干燥的进风温度190℃,出风温度90～100℃.在聚甘油酯用量0.3％(占壁材和芯材总质量),麦芽糊精与阿拉伯胶质量比4∶1,SC用量15％(占壁材和芯材总质量),固形物含量30％(壁材溶液),壁材与芯材质量比为3∶2,椰子油与菜籽油质量比7∶3的条件下,制得的粉末油脂表面含油率为1.19％,包埋效率为96.06％.该新型粉末油脂感官性状良好;复原乳状液的乳化程度高,乳化稳定性好;含有18.64％的油酸和4.16％的亚油酸,营养价值较高.     

以大豆蛋白制备微胶囊化鱼油的研究（II）：微胶囊化鱼油的工艺研究

研究喷雾干燥法轩高包埋量微胶囊化鱼油的工艺条件，探讨了乳化温度，均质压力，均质次数和喷雾干燥进风温度，出风温度对微胶囊化效果的影响，经过正交试验，确定了最佳工艺条件，扩大试验和产品超微结构的观察证实了壁材配方和加工工艺的合理性。     

喷雾干燥枸杞粉助干剂研究

以新鲜枸杞为原料,经榨汁、过滤、调配、胶体磨、均质和喷雾干燥工艺生产枸杞粉,采用单因素和正交实验相结合,研究了三种助干剂及其添加量对枸杞粉出粉率及感官的影响。实验结果表明,当麦芽糊精加入60%,β-环糊精加入8%,CMC加入1.0%时,喷雾干燥效果最好,出粉率达到30.5%,感官评分9.78分;通过方差分析,得出麦芽糊精对出粉率和感官的影响最大,β—环糊精次之,CMC对枸杞喷雾干燥影响不显著。     

以大豆蛋白制备微胶囊化鱼油的研究(Ⅱ)——微胶囊化鱼油的工艺研究

研究喷雾干燥法制备高包埋量微胶囊化鱼油的工艺条件。探讨了乳化温度、均质压力、均质次数和喷雾干燥进风温度、出风温度对微胶囊化效果的影响。经过正交试验，确定了最佳工艺条件。扩大试验和产品超微结构的观察证实了壁材配方和加工工艺的合理性。     

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。     

喷雾干燥及热风干燥对南瓜粉营养特性和感官品质的影响

以新鲜南瓜为原料,分别研究了喷雾干燥及热风干燥两种不同干燥工艺对南瓜粉营养特性和感官性能的影响,重点研究了喷雾干燥的干燥温度、压缩空气流量与改良剂添加量(南瓜固形物与麦芽糊精比例)及热风干燥的干燥温度,物料厚度与改良剂添加量(南瓜固形物与麦芽糊精比例)三个因素的影响,以南瓜粉成品的Vc和β-胡萝卜素含量及感官评分作为评...     

静电喷雾干燥微囊化乳双歧杆菌BL03

静电喷雾干燥是新型微囊化益生菌的方法。该文研究了静电喷雾干燥乳双歧杆菌BL03保护剂和微囊化工艺,通过单因素和正交试验,优化得到保护剂组成为海藻糖14%,亚麻酸10%,CaHPO 46%,β-环糊精11%(均为质量分数),最佳静电喷雾微囊化工艺进风温度80℃,物料泵流量30 r/min,静电压25 kV,存活率高达89.26%。乳双歧杆菌BL03菌粉扫描电镜图片显示,静电喷雾干燥微囊化包埋效果最好,包埋率高达93.3%。比较静电喷雾干燥、常规干燥和乳化冷冻干燥3种微囊化方法,静电喷雾干燥模拟胃液作用2 h,存活率超过80%;模拟肠液作用4 h,存活率达到75%;25℃下储存12个月,活菌数存活率超过70%,均明显优于常规干燥和乳化冷冻干燥,说明静电喷雾干燥微囊化方法适合包埋乳双歧杆菌。     

干燥方式对湿法加工奶茶固体饮料感官和稳定性的影响

为了考察干燥方式对湿法加工奶茶固体饮料感官和稳定性的影响,本实验以喷雾干燥和真空干燥两种方式干燥奶茶固体饮料。结果表明,经过真空干燥的奶茶粉冲泡浮油严重,口感和组织状态显著差于喷雾干燥奶茶粉。真空干燥奶茶粉表面油含量为13.44%,而喷雾干燥仅为0.78%,通过粒径分布和透光率测定,均显示真空干燥奶茶粉稳定性差,喷雾干燥稳定性较佳。在得率方面,喷雾干燥得率59%,真空干燥74%。综合各项结果,喷雾干燥更适合干燥湿法奶茶固体饮料。     

全枣肉红枣粉加工技术研究

以红枣浆流变学特性的黏性指数为指标优化枣浆酶解参数,喷雾干燥法制备红枣粉,检测了主要成分的变化。得到枣浆最佳酶解条件为:去皮去核干枣与枣浆质量比为0.20,酶解温度43℃,时间4h,酶用量0.27mL/g。红枣粉喷雾干燥工艺参数为:去皮去核干枣与枣浆质量比为0.20,麦芽糊精加量与枣浆中干枣质量相等,料液进口温度为120℃,蠕动泵进料量为600mL/h。红枣总黄酮的含量随着红枣酶解、均质和喷雾干燥逐渐降低,总多酚酶解后升高而均质和喷雾干燥后下降,而总糖含量则随着酶解、均质而逐渐上升。HPLC法测定红枣中含有原儿茶酸、儿茶素、咖啡酸、表儿茶素、芦丁、肉桂酸和槲皮素,咖啡酸的含量在酶解后升高均质及喷雾干燥后降低,槲皮素的含量先升高喷雾干燥后降低,其余5种组份的含量均随着酶解、均质、喷雾干燥后降低。得到红枣原粉含量达50%的色泽微黄、枣香浓郁的产品。     

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.     

Behaviour of oil droplets during spray drying of milk-protein-stabilised oil-in-water emulsions

The effects of spray drying on the behaviour of oil droplets in oil-in-water emulsions (12.0%, w/w, maltodextrin; 20.0%, w/w, soya oil) stabilised with either sodium caseinate or whey protein isolate (WPI) were examined as a function of protein concentration (0.5–5.0%, w/w). Spray drying and redispersion caused a shift in the droplet size distribution to larger values for all emulsions made using low protein concentrations (0.5–2.0%, w/w), in comparison with their respective parent emulsions. However, the droplet size distribution was affected only very slightly by spray drying when the protein concentration was above 2.0% (w/w). The effects of maltodextrin concentration (1.0–25.0%, w/w) on the behaviour of WPI-stabilised emulsions (0.5–10.0%, w/w, WPI, 20.0%, w/w, soya oil) were also examined. Emulsions containing low levels of maltodextrin showed marked re-coalescence during spray drying and redispersion even at a WPI concentration of 10.0% (w/w).     

杨梅汁速溶固体饮料的加工工艺研究

以杨梅汁为原料进行速溶固体饮料的研究,以探讨杨梅汁喷雾干燥助干剂和饮料配方对产品稳定性与品质的影响。结果表明,喷雾干燥中添加15%麦芽糊精的助干剂, 稳定效果较好。L9(34)正交实验显示,蔗糖和柠檬酸对杨梅汁感官品质的影响较显著,阿斯巴甜和异抗坏血酸对感官品质的影响不显著;最佳配方为6%蔗糖 2%柠檬酸 0.35%阿斯巴甜 0.35%异抗坏血酸,在此条件下品质最佳。     

Feasibility of Spray Drying Concentrated Acid Whey After Nanofiltration

Concentration of acid whey and crystallisation of lactose followed by spray drying in the production of acid whey powder are severely restricted by the presence of lactic acid (LA) and calcium (Ca). These compounds cause stickiness during spray drying. The present study examined the effects of removing LA and Ca by membrane processing to varying extents in order to improve the feasibility of the spray drying of an acid whey stream. Spray drying of unaltered acid whey achieved a powder recovery of ~?18% in the collection vessel and ~?31% in the cyclone. Removal of LA and Ca by 30 and 40%, respectively, by nanofiltration significantly increased the powder recovery to ~?58% in the collection vessel. Powder particles decreased in size giving a D[4,3] of ~?18 μm, with SEM images confirming the presence of well separated spherical powder particles. A solubility of >?75% was also achieved. However, removing Ca >?60% compromised the spray drying process. FTIR analysis suggested that water molecules in the hydration layer of lactose and the structural changes of both lactose and protein molecules at the molecular level appeared to play an important role in governing the extent of the drying feasibility. In addition, the formation of calcium lactate may restrict the diffusion of lactose molecules, once the appropriate stoichiometry was reached. Thus, manipulating LA and Ca concentrations in a particular acid whey stream can improve the spray drying process and production of a non-sticky acid whey powder.     

甘薯叶提取物喷雾干燥工艺研究

探讨甘薯叶提取物的喷雾干燥制备工艺。在单因素试验基础上,通过L9(34)正交试验对喷雾干燥工艺进行优化,确定最佳的喷雾干燥条件为进风温度190℃、进料流量300mL/h、总固形物含量25%,其中进料流量对喷雾干燥效果的影响最大。在此条件下所得产品出粉率为53.78%、含水量5.29%、活性损失率11.13%。     

不同干燥方式对西番莲果皮中湿法改性膳食纤维品质的影响

本实验以西番莲果皮中湿法改性膳食纤维为原料,探讨了热风干燥、微波干燥、真空冷冻干燥、喷雾干燥和冷冻喷雾干燥五种干燥方式对其色泽形貌、粉体性质及理化性质的影响。结果表明,湿法改性后,纤维组织破坏严重,再经不同干燥方式处理,膳食纤维的形貌和色泽都产生很大变化;真空冷冻干燥和冷冻喷雾干燥处理的膳食纤维表现出极佳的持水力、持油力及吸湿性,结果分别为:持水力24.1、16.4 g/g;持油力11.8、8.3 g/g;吸湿性19.3%、19.8%;真空冷冻干燥和冷冻喷雾干燥振实密度较小,其分散性、溶解性和吸附性能较佳;喷雾干燥处理的膳食纤维休止角为38.5°,表现出最佳的流动性;另外各处理间的膨胀力和阳离子交换能力差异不明显。综上,真空冷冻干燥和冷冻喷雾干燥处理对西番莲果皮中湿法改性膳食纤维品质改善最为显明显。