阅读说明：本技术 一种零热量糖粉的制备方法 (Preparation method of zero-calorie powdered sugar ) 是由 孙华荣 于 2020-07-14 设计创作，主要内容包括：本发明公开了一种零热量糖粉的制备方法,包括菌株培养器、斜面培养基、发酵罐、蒸发装置、粗破碎机和细破碎机,菌株培养器中加入解脂假丝酵母,由解脂假丝酵母诱变制得菌株,制得的菌株加入斜面培养基中培养,培养后的菌株加入到发酵罐内进行发酵,发酵后制得的糖液加入到蒸发装置内进行蒸发,去除水分后制得晶体,将晶体加入到粗破碎机内进行一次破碎,将块状的晶体破碎成小晶体,小晶体加入到细破碎机内进行二次破碎,将小晶体破碎成粉状,粉状颗粒加入到封装设备中经过称量后定量包装。本发明具有破碎分为两次进行,粗破碎和细破碎分开,破碎更彻底的同时保护破碎设备的优点。(The invention discloses a preparation method of zero-heat powdered sugar, which comprises a strain incubator, an inclined plane culture medium, a fermentation tank, an evaporation plant, a coarse crusher and a fine crusher, wherein Candida lipolytica is added into the strain incubator, a strain is prepared by mutagenesis of the Candida lipolytica, the prepared strain is added into the inclined plane culture medium for cultivation, the cultured strain is added into the fermentation tank for fermentation, the sugar solution prepared after fermentation is added into the evaporation plant for evaporation, crystals are prepared after moisture is removed, the crystals are added into the coarse crusher for primary crushing, the blocky crystals are crushed into small crystals, the small crystals are added into the fine crusher for secondary crushing, the small crystals are crushed into powder, and the powder particles are added into packaging equipment for weighing and quantitative packaging. The invention has the advantages that the crushing is divided into two times, the coarse crushing and the fine crushing are separated, the crushing is more thorough, and the crushing equipment is protected.)

1. A preparation method of zero-calorie powdered sugar comprises a strain incubator, a slant culture medium, a fermentation tank, an evaporation plant, a coarse crusher and a fine crusher, and is characterized in that: adding candida lipolytica into a strain incubator, preparing a strain by mutation of the candida lipolytica, adding the prepared strain into a slant culture medium for culture, adding the cultured strain into a fermentation tank for fermentation, adding a sugar solution prepared after fermentation into an evaporation device for evaporation, removing water to prepare crystals, adding the crystals into a coarse crusher for primary crushing, crushing blocky crystals into small crystals, adding the small crystals into a fine crusher for secondary crushing, crushing the small crystals into powder, adding the powder particles into packaging equipment, weighing and quantitatively packaging.

2. A process for the preparation of a zero calorie sugar powder according to claim 1, characterized in that: measuring about 3mL of acetone to dissolve nitrosoguanidine, adding 27mL of 0.2mol/L malate buffer solution to prepare a nitrosoguanidine mutagen with the concentration of lmg/mL, weighing 30mg of the nitrosoguanidine mutagen by using an aseptic weighing bottle, adding into a strain incubator, adding 10 times of thallus suspension with the volume concentration of 102-108/mL, and irradiating for 5-120 s at a position of 20cm by using a 30W ultraviolet lamp under an aseptic condition; diluting with sterile normal saline, and performing plate culture at 30 deg.C for more than 5 days.

3. A process for the preparation of a zero calorie sugar powder according to claim 1, characterized in that: adding 200g of glucose, 10g of yeast extract, 1g of urea, 20g of agar and 1000ml of purified water into the slant culture medium to prepare a standard reagent, controlling the pH value to be 6.0, and adding the strain cultured by the strain incubator into the slant culture medium.

4. A process for the preparation of a zero calorie sugar powder according to claim 1, characterized in that: when the fermentation tank works, the fermentation temperature is controlled between 30 ℃ and 40 ℃, the ventilation volume in the fermentation tank is 0.5vvm, the dissolved oxygen is controlled to be 20 percent to 30 percent in the growth period of the thallus fermentation, the dissolved oxygen is adjusted to be 10 percent to 15 percent after the fermentation is carried out for 40 hours to 50 hours, and the dissolved oxygen rate is kept until the fermentation is finished.

5. A process for the preparation of a zero calorie sugar powder according to claim 1, characterized in that: the gaps between the teeth of the crushing teeth in the coarse crusher are 2mm, the crystals after evaporation are primarily crushed, the gaps between the teeth of the crushing teeth in the fine crusher are 0.2mm, and the crystals after primary crushing are crushed into powder again.

6. A process for the preparation of a zero calorie sugar powder according to claim 1, characterized in that: taking 0.5ml of diluted sample after proper fermentation, adding 0.5ml of iodic acid reagent, uniformly mixing, standing for 8mnin, adding 0.5ml of stannous chloride reagent, uniformly mixing, adding 5ml of discolor acid reagent, shaking, cooling in boiling water bath for 30min, measuring the light absorption value at 570nm, and calculating according to the regression equation of the obtained light absorption value and the concentration of the standard substance.

7. A process for the preparation of a zero calorie sugar powder according to claim 1, comprising the steps of:

s1, weighing 30mg of nitrosoguanidine mutagen by using an aseptic weighing bottle, adding the nitrosoguanidine mutagen into a strain incubator, adding 10 times of thallus suspension with the volume concentration of 102-108/mL, and irradiating the thallus suspension at a position of 20cm for 5-120S by using a 30W ultraviolet lamp under an aseptic condition; adding sterile normal saline for dilution, and performing plate culture at 30 ℃ for more than 5d to obtain a bacterial liquid;

s2, adding 200g of glucose, 10g of yeast extract, 1g of urea, 20g of agar and 1000ml of purified water into the slant culture medium, controlling the pH value to be 6.0, and quantitatively adding the bacterial liquid cultured in the strain incubator into the slant culture medium;

s3, adding the bacterial liquid cultured by the slant culture medium into a fermentation tube, controlling the fermentation temperature to be 34 ℃ when the fermentation tank works, controlling the ventilation quantity in the fermentation tank to be 0.5vvm, controlling the dissolved oxygen to be 30% during the fermentation period of the thalli, adjusting the dissolved oxygen to be 15% after fermenting for 50 hours, and keeping the dissolved oxygen rate until the fermentation is finished;

s4, conveying the fermented liquid into an evaporation device, evaporating water in the liquid at high temperature of the evaporation device, and leaving crystals on an evaporation dish until all the crystals are evaporated and taking out the obtained crystals;

s5, adding the crystals into a coarse crusher to obtain crushed crystals, wherein the sizes of the obtained crystals are different;

s6, adding the crushed crystals into a fine crusher, and secondarily crushing the crushed crystals into powder by a crushing wheel in the fine crusher;

and S7, conveying the crushed powder into a quantitative packaging device, weighing by the packaging device, and quantitatively packaging to obtain a finished product.

Technical Field

The invention relates to the technical field of powdered sugar preparation, in particular to a preparation method of zero-calorie powdered sugar.

Background

Powdered sugar is a white powdery sugar. The powdered sugar has very fine particles, and about 3-10% of starch mixture, can be used as a seasoning or various folk delicious snacks, and has the effects of preventing moisture and preventing sugar particles from tangling.

In order to reduce the heat in sugar powder, erythritol is often used as a raw material production facility. Erythritol is a pure natural sweetener with zero calorie and integrated nutrition and health promotion functions, which is prepared by fermenting glucose with natural strains, and has no blood sugar increase, no obesity, and dental caries prevention effects. Is an ideal cane sugar substitute for hyperglycemia groups and healthy people. Erythritol is a newly developed 4-carbon sugar alcohol, can be prepared by fermentation of glucose, is a white crystalline powder, has a refreshing sweet taste, is less likely to absorb moisture, is stable at high temperatures, is stable in a wide PH range, has a mild refreshing feeling when dissolved in the mouth, and is suitable for various foods.

Crystals obtained in the process of preparing powdered sugar are obtained by crushing through a crushing device and are generally directly crushed at one time, and a fine crusher can cause large load to crushing wheels in the crusher when crushing the crystals with different sizes.

Disclosure of Invention

The invention aims to provide a preparation method of zero-heat powdered sugar, which has the advantages that crushing is carried out twice, coarse crushing and fine crushing are separated, crushing is more thorough, crushing equipment is protected, and the problem that a fine crusher can cause larger load to crushing wheels in the crusher when crushing crystals with different sizes is solved.

In order to achieve the purpose, the invention provides the following technical scheme: a process for preparing powdered sugar without heat includes such steps as adding the candida lipolytica to the bacterial strain culture container, inducing to obtain bacterial strain, culturing in slant culture medium, fermenting in fermenting tank, adding the fermented sugar liquid to evaporating unit, removing water to obtain crystal, crushing crystal in coarse crusher, crushing crystal to become small crystal, crushing small crystal in fine crusher, crushing small crystal to become powder, adding the powder particles to packing apparatus, weighing and quantitative packing.

As a further scheme of the invention, about 3mL of acetone is measured to dissolve nitrosoguanidine, 27mL of 0.2mol/L malate buffer solution is added to prepare the nitrosoguanidine mutagen with the concentration of lmg/mL, 30mg of the nitrosoguanidine mutagen is weighed by an aseptic weighing bottle and added into a strain incubator, 10 times of thallus suspension with the volume concentration of 102-108/mL is added, and a 30W ultraviolet lamp is used for irradiating for 5-120 s at a position of 20cm under the aseptic condition; diluting with sterile normal saline, and performing plate culture at 30 deg.C for more than 5 days.

As a further scheme of the invention, 200g of glucose, 10g of yeast extract, 1g of urea, 20g of agar and 1000ml of purified water are added into the slant culture medium to prepare a standard reagent, the pH is controlled to be 6.0, and the strain cultured by the strain incubator is added into the slant culture medium.

In a further embodiment of the invention, the fermentation temperature is controlled between 30 ℃ and 40 ℃ when the fermentation tank is in operation, the aeration rate in the fermentation tank is 0.5vvm, the dissolved oxygen is controlled between 20% and 30% during the growth period of the bacterial fermentation, the dissolved oxygen is adjusted to between 10% and 15% after the fermentation is carried out for 40 hours to 50 hours, and the dissolved oxygen rate is maintained until the fermentation is finished.

As a further aspect of the present invention, the gap between the teeth of the crushing teeth in the coarse crusher is 2mm, the crystals after evaporation are primarily crushed, and the gap between the teeth of the crushing teeth in the fine crusher is 0.2mm, and the crystals after primary crushing are crushed again into a powder form.

As a further scheme of the invention, 0.5ml of diluted sample after proper fermentation is taken, 0.5ml of iodic acid reagent is added and mixed uniformly, the mixture is kept stand for 8 min, 0.5ml of stannous chloride reagent is added and mixed uniformly, 5ml of discolor acid reagent is added and shaken, then the mixture is cooled in boiling water bath for 30min, the light absorption value is measured at 570nm, and then the regression equation of the obtained light absorption value and the concentration of the standard substance is calculated.

A method for preparing zero calorie sugar powder comprises the following steps:

s1, weighing 30mg of nitrosoguanidine mutagen by using an aseptic weighing bottle, adding the nitrosoguanidine mutagen into a strain incubator, adding 10 times of thallus suspension with the volume concentration of 102-108/mL, and irradiating the thallus suspension at a position of 20cm for 5-120S by using a 30W ultraviolet lamp under an aseptic condition; adding sterile normal saline for dilution, and performing plate culture at 30 ℃ for more than 5d to obtain a bacterial liquid;

s2, adding 200g of glucose, 10g of yeast extract, 1g of urea, 20g of agar and 1000ml of purified water into the slant culture medium, controlling the pH value to be 6.0, and quantitatively adding the bacterial liquid cultured in the strain incubator into the slant culture medium;

s3, adding the bacterial liquid cultured by the slant culture medium into a fermentation tube, controlling the fermentation temperature to be 34 ℃ when the fermentation tank works, controlling the ventilation quantity in the fermentation tank to be 0.5vvm, controlling the dissolved oxygen to be 30% during the fermentation period of the thalli, adjusting the dissolved oxygen to be 15% after fermenting for 50 hours, and keeping the dissolved oxygen rate until the fermentation is finished;

s4, conveying the fermented liquid into an evaporation device, evaporating water in the liquid at high temperature of the evaporation device, and leaving crystals on an evaporation dish until all the crystals are evaporated and taking out the obtained crystals;

s5, adding the crystals into a coarse crusher to obtain crushed crystals, wherein the sizes of the obtained crystals are different;

s6, adding the crushed crystals into a fine crusher, and secondarily crushing the crushed crystals into powder by a crushing wheel in the fine crusher;

and S7, conveying the crushed powder into a quantitative packaging device, weighing by the packaging device, and quantitatively packaging to obtain a finished product.

Compared with the prior art, the invention has the following beneficial effects: adding crystals with different sizes into a coarse crusher, wherein the gap between crushing gear teeth in the coarse crusher is 2mm, and crushing the crystals once by using a crushing wheel in the coarse crusher to obtain crushed crystals; and adding the crushed crystals into a fine crusher, wherein the gap between crushing gear teeth in the fine crusher is 0.2mm, and crushing the crushed crystals into powder by a crushing wheel in the fine crusher for the second time. The crushing is divided into two times, the coarse crushing and the fine crushing are separated, different crushers correspondingly crush different crystals, and crushing wheels in crushing equipment are protected while the crushing is more thorough.

Drawings

FIG. 1 is a schematic diagram of a preparation process of the present invention;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.