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黄原胶发酵液的提纯浓缩研究 总被引:8,自引:0,他引:8
本文采用过滤与超滤工艺对黄原胶进行提纯和浓缩研究,研究结果表明,黄原胶发酵液经过滤与超滤处理可去除发酵液中悬浮的不溶性固形物和可溶性离子物质。产品得到提纯并可获得浓度为8.7%的黄原胶浓缩掖。提纯和浓缩后的黄原胶具有良好的增粘性,触变性和冷热稳定性。 相似文献
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李琰 《郑州轻工业学院学报(自然科学版)》2002,17(1):28-30
以玉米芯为原料 ,用酸水解 ,经中和、蒸发、脱色、离子交换、加氢、浓缩、结晶并将母液进行再处理可生产出木糖醇 .采用正交试验法研究了水解条件对木糖醇得率的影响 :在最佳生产工艺条件下 (水解压力 0 0 5MPa ,水解温度 12 0℃ ,加H2 SO4 浓度为 1 5 % ,水解时间 4h) ,木糖醇得率可达6 2 2 % . 相似文献
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赤藓糖醇生产废弃母液的成分分析表明,母液中固形物含量约为70%,其中赤藓糖醇约占干物的30%,灰分约占干物的20%,检测不到葡萄糖。液相色谱分析结果表明,母液中有机固形物除赤藓糖醇外,还含有另外2种未知糖醇组分。实验主要探讨了从赤藓糖醇生产废弃母液中回收赤藓糖醇的可行性,重点考察了废弃母液的脱盐效果及其对赤藓糖醇回收的影响。以交换容量和产物的吸附为考察指标,筛选出D315和001*7阴阳2种离子交换树脂用于母液脱盐除杂,采用双柱串联工艺,活性炭脱色处理后的母液脱盐率可达98.5%。经减压蒸馏、降温结晶,母液赤藓糖醇结晶回收率达47.3%,纯度达99%以上。 相似文献
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基于悬浮结晶式冷冻浓缩仪,将传统上相互分离的单元操作——刮面换热器、结晶器和洗涤柱整合,研发具有三位一体紧凑结构的多级智能化冷冻浓缩仪。采用该冷冻浓缩仪对苹果汁进行冷冻浓缩,并以真空蒸发浓缩作对比分析。结果表明:单级浓缩比约为1.8;经三级冷冻浓缩后苹果汁可溶性固形物含量由初始的10.5°Brix增加至34.5°Brix;VC和芳香物乙酸丁酯的保留率均在90%以上;同时对还原糖的破坏和果汁颜色的影响很小;此外,可溶性组分在冰晶和母液中的分配系数为0.008 1~0.067 0;三级冷冻浓缩后对应的可溶性固形物回收率约为98%。对比分析结果表明,当苹果浓缩汁可溶性固形物含量为33.6°Brix时,真空蒸发浓缩苹果汁的VC保留率为84.5%,芳香物乙酸丁酯保留率为43.9%。就苹果汁营养及风味保存而言,冷冻浓缩远优于蒸发浓缩。 相似文献
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《中国食品添加剂》2015,(10)
以木糖醇母液为研究对象,研究顺序式模拟移动色谱分离木糖醇母液的前处理工艺。利用单因素与响应面法对木糖醇母液的前处理工艺进行优化,在单因素试验基础上,考察活性炭添加量、脱色温度、脱色时间、脱盐方式等因素对木糖醇母液脱色率的影响,再根据Box-Behnken试验设计原理,采用响应面方法优化木糖醇母液脱色条件,考察离子交换脱盐的顺序与洗脱流速对木糖醇母液脱盐的影响。结果显示:顺序式模拟移动色谱分离木糖醇母液的前处理工艺参数为:木糖醇母液浓度为25%,活性炭添加量3.71%,脱色温度59℃,脱色时间1.77h,木糖醇母液的脱色率达到93.5±0.5%。离子交换脱盐的顺序为阴-阳-阴,洗脱流速为30m L/min,母液的电导率为25.5±0.5μS/cm。经本工艺处理得到木糖醇母液达到了顺序式模拟移动床分离木糖醇母液的进料要求。 相似文献
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D-对羟基苯甘氨酸(D-HPG)是合成甜味剂、药物的重要中间体,为降低工艺成本,提高产品质量,提出了一种结晶母液回收D-HPG的连续色谱新工艺。优选纳滤膜进行前处理,增浓结晶母液,筛选Applexion NF200纳滤膜增浓D-HPG效果较好。通过单柱实验筛选连续色谱系统填料树脂,其中Applexion XA945树脂对D-HPG和硫酸铵分离度可达16。进一步对色谱系统的分离效果进行研究,结果表明,经连续色谱分离后,进料液中D-HPG平均纯度由42.2%提高至96.3%,平均收率达91%。利用连续色谱系统从结晶母液中回收D-HPG,是较有前途的工艺。与传统工艺相比,新工艺既保证了D-HPG总收率,又降低其工艺成本,提高了产品质量。 相似文献
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利用模拟移动床 (SMB)连续色谱技术分离木糖醇母液中的木糖和木糖醇组分 .在平衡理论的框架下 ,提出了使用基于相应的真实移动床 (TMB)的简化数学模型研究各进料液和产品流出液的流量等操作参数的变化对SMB分离性能 (以纯度和收率作为性能指标 )影响的方法 ,并采用该方法进行了操作条件寻优仿真 ,取得了满意结果 .在实验室SMB分离设备上 ,基于此最佳操作条件所得到的木糖和木糖醇产品液纯度和收率均达到 1 0 0 % . 相似文献
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Mohamed A. Al-Farsi 《International Journal of Food Science & Technology》2003,38(3):241-245
Summary This study was initiated to utilize a variety of low quality dates (Qish‐Habash) so that high quality syrup could be produced by modifying the clarification process of the date juice. Five different clarification treatments were used: (1) filtration, (2) hot liming and filtration, (3) cold liming and filtration, (4) powder‐activated carbon and filtration, and (5) granular‐activated carbon and filtration. The sugar content, total soluble solids, total ash, pH, colour and purity were analysed to determine the clarification effects. The clarified juices produced by these treatments were evaporated under constant conditions to produce date syrup. Filtration, and activated carbon and filtration were the most successful treatments for the clarification of the date juice. Filtration gave the highest improvement in syrup purity (97.7%), due to the reduction of total ash by 19.5% and colour by 44.6%. Activated carbon removed the juice colour to give the lowest amount (60% in powder form and 57% in granular form), as well as reducing total ash, which led to an improved syrup purity, 92.2% in powder form and 91.4% in granular form. Liming clarification had undesirable effects, by increasing the total ash (15% in hot and 17% in cold lime), and increasing the colouring matter produced by decomposition. 相似文献
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木糖生产过程中产生大量的木糖结晶母液。由于其杂糖含量较高,仅通过常规的浓缩,结晶等步骤,很难从中回收得到结晶木糖。本研究采用酵母发酵技术,先脱除木糖母液中的葡萄糖等杂糖,再结合真空浓缩与冷却结晶工艺,可以再析出晶体木糖,收率约25%。微生物脱除葡萄糖技术同样可用于玉米芯水解液中葡萄糖的有效去除,以提高木糖的结晶得率。 相似文献
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The yeast Saccharomyces cerevisiae ATCC 36859, which preferentially utilizes glucose in glucose-fructose mixtures, was immobilized and used for the continuous production of very enriched fructose syrup. A syrup containing fructose as 99% of the reducing sugars was produced from a 10.1% w/v glucose and 9.8% w/v fructose mixture at a dilution rate of 0.106 h−1 . Later in this process when the dilution rate was increased to 0.366 h−1 the ethanol productivity was 12.7 g 1−1 h−1 . This is 16% less than the value attained in a similar medium containing only glucose as the carbohydrate. The fructose content was also increased from 55 to 95% of the reducing sugars in a food grade mixture of high fructose corn syrup and Jerusalem artichoke juice. Purification of the product with activated carbon and ion-exchange resin produced a stable, colourless and very enriched fructose syrup suitable for human consumption. 相似文献
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ABSTRACT Processing times required to achieve a target level of soluble solids were determined in apple pieces during sequential osmotic dehydrations carried out with reused sucrose syrup, in which new loads of fruits were charged in each turn. Effective diffusivities for water and sucrose in apple pieces were experimentally determined as a function of syrup soluble solids. A computer program was written to predict soluble solids change both in apple pieces and in syrup during the sequential osmotic dehydration process. Experimental data on the change of soluble solids for apples and syrup for 10 batches arranged in 2 sets of 5 were obtained. A good agreement between observed and predicted values of soluble solids in both fruit and the syrup was obtained, with root mean square values ranging from 1.3% to 4.6%. 相似文献
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J. RUBEN ABRIL J. WARREN STULL RALPH R. TAYLOR ROBERT C. ANGUS TERRY C. DANIEL 《Journal of food science》1982,47(2):472-475
Combinations of xylitol, fructose and 24 DE corn syrup solids (CSS) were the sweetening agents in ice cream-type frozen desserts. A 23 factorial experimental design evaluated the most acceptable combinations of xylitol (4% or 6%), fructose (4% and 6%) and CSS (10% and 12%). Based on chemical, physical and sensory analyses of the eight experimental combinations it was demonstrated that a formulation involving 6% xylitol, 6% fructose and 10% CSS gave product acceptability similar to that of an ice cream with conventional ingredient array and composition. 相似文献
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《Journal of dairy science》1987,70(4):766-775
Five processes were used to fractionate low heat NDM into a number of products including crude casein, three types of lactalbumin, crude lactose, United States Pharmacopeia-grade lactose, and a partially deproteinated whey product. Regular lactalbumin and crude lactose were produced by process 1 with a total recovery of 91% of starting NDM solids including those obtained from the casein fraction. Process 2 led to the production of both high and low ash lactalbumin and crude lactose, but the total solids recovery was about 10% lower than process 1 due to extra material handling. Both Processes 3 and 4 allowed for the crystallization of crude lactose from condensed whey containing the full protein complement. Process 4 was similar to process 3 except provision was made to return the mother liquor from the United States pharmacopeia lactose preparation back to the starting casein whey; this increased the solids recovery from 91 to 96%. The fifth process was used to purify the crude lactose of processes 1 to 4 for the preparation of United States Pharmacopeia grade lactose. 相似文献