CN103146782A - Method for preparing glucose syrup by using rice bran as raw material - Google Patents
Method for preparing glucose syrup by using rice bran as raw material Download PDFInfo
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Abstract
The invention discloses a method for preparing glucose syrup by using rice bran as a raw material. The method comprises the following steps: with rice bran as astarting material, degreasing, deproteinizing and removing the aqueous impurities to obtain rice bran meal; carrying out the liquefying reaction on the rice bran meal under the catalysis of Alpha-amylase at a high temperature to obtain maltodextrin; carrying out catalyzing and saccharifying reaction by using saccharifying enzyme; and desalinating, de-colorizing and purifying to obtain the glucose syrup. The glucose syrup product prepared by the method disclosed by the invention has high purity and high quality, and can reach the high DE value level (higher than 60%) standard of the national glucose syrup quality standard (GB/T20885-2007).
Description
technical field:
The present invention relates to a kind of use aboundresources and be worth cheap rice bran prepare the method for glucose syrup via enzyme catalysis method for starting raw material.
technical background:
Glucose syrup (Glucose Syrup) is that to take starch or starchiness be raw material, through full-enzyme method, acid system, enzymatic acidification method or acid-enzyme hydrolysis method hydrolysis, refining and contain glucose (chemical formula C
6h
12o
6) mixing molasses.Glucose syrup not only directly is widely used in candy industry and food-processing industry, also further through processing and refining, becomes chemical grade, food grade and pharmaceutical grade glucose crystal elaboration, in every field, broader applications is arranged.Glucose syrup is made by Starch Hydrolysis, is mostly to be obtained by the W-Gum hydrolysis.The main raw material for preparing at present glucose both at home and abroad is food crop corn and sweet potato.
The structural formula of glucose is as follows:
But along with the urbanization of population growth, social development, plough and day by day reduce, grain supply and demand contradiction is constantly nervous, and therefore taking full advantage of grain resource has very important meaning.66,181 ten thousand tons of world's paddy productions (2008).China is rice yield the first big country, produces 18,692 ten thousand tons of paddy per year, produces 10% left and right byproduct rice bran in the paddy course of processing.The chaff layer that rice bran separates out while being brown rice (glutinous millet) pearling and the mixture of plumule.Paddy per ton is processed into the rice bran that polished rice can obtain 100 kilograms of left and right.The annual production of China's rice bran is about 1,300 ten thousand ton of left and right according to statistics.This is a very huge renewable resources.Yet China only has 10% left and right rice bran for oil expression and deep processing, resource obtains far away rationally increment and utilizes.The residuum that rice bran extracts after Rice pollard oil is rice bran meal (namely defatted rice bran).Defatted rice bran starch-containing (approximately 20～30%) and other useful matter.
summary of the invention:
The objective of the invention is in order to provide a kind of is the method that raw material prepares glucose syrup with rice bran.The glucose syrup product purity and the quality that adopt present method to prepare are high, can reach high DE value rank (> 60% in national glucose syrup quality standard (GB/T20885-2007)) standard.
The object of the present invention is achieved like this:
The present invention be take rice bran and is prepared the method for glucose syrup as raw material, the method is to take rice bran as starting raw material, obtain rice bran meal (being defatted rice bran) through degreasing, deproteinated and the solubility impurity that anhydrates, rice bran meal becomes Star Dri 5 with high temperature α-catalyzed by amylase through liquefaction reaction, then through saccharifying enzyme catalysis saccharification react, then carry out the desalination bleaching purifying and obtain glucose syrup.
Above-mentioned take rice bran as raw material prepares the method for glucose syrup, comprise the following steps:
1) take rice bran as starting raw material, to raw materials pretreatment and mensuration: at first remove mechanical impurity in rice bran, ash content, foreign matter etc., check that raw material is without rotten corrupt, without mould, then raw material is pulverized, obtained 80～200 order homogeneous materials, with Iodine colorimetry, measured starch content 15～30%, with Kjeldahl nitrogen determination protein content 12～17%, moisture 8～15%;
2) pretreated raw rice bran degreasing is removed to Rice pollard oil, obtain rice bran meal (defatted rice bran), the method for degreasing can be milling process, also can be solvent extraction method, for example uses food grade normal hexane or hexanaphthene extraction, preferentially selects solvent extraction method;
3) remove protein and the water-soluble impurity in rice bran meal: for obtaining up-to-standard and high-quality grapes syrupy product, avoid the difficulty of subsequent purification product and cost to increase, at first the present invention first removes the protein in rice bran meal and other water-soluble substances as far as possible;
4) rice bran meal of above processing is added to the deionized water of suitable proportion, the mixture that the ratio that obtains solid materials and water is 1:1～1:10, stir, and with dilute hydrochloric acid, adjusts pH to 5.0～7.0, adds 0.1%～0.5% CaCl of raw material weight
2, then high temperature α-amylase being added in this mixtures of materials, every 6～8 units of enzyme for the gram raw material, after fully mixing, be heated to 85～95
oc, liquefaction reaction 0.5～2.0 hour, be cooled to room temperature by reaction solution, filters, and filtrate is in 50～80
oc hot water bath, through being evaporated to 25～50% of original volume, obtains maltodextrin solution, and 0.1～1.0% the saccharifying enzyme to adding raw material weight in maltodextrin solution, stir, and adjust pH to 4～5, in 50～70
oc insulation reaction 24～48 hours, check into negative to dextrin;
5) add gac in right amount in above reaction solution, stir decolouring in 0.5～2.0 hour, remove by filter gac and impurity with thin glass hourglass bucket, filtrate is used respectively positively charged ion and anionite-exchange resin desalination again, the resin of preferentially selecting is 732 Zeo-karbs and 701 anionite-exchange resin desalinations, and elutriant is finally in 50～70
oc hot water bath, through being evaporated to 60%～70%, obtains water white transparency glucose syrup product.
Above-mentioned steps 3) method of protein in rice bran meal of removing in comprises thermokalite aqueous solution method of enzymatically treating, it is 5%～15% NaOH or 5%～15% KOH or 5%～15% LiOH alkaline solution that the alkali that the thermokalite aqueous process is used is selected concentration expressed in percentage by weight, the pH value is controlled at 9.0～12.0, and temperature is controlled at 80
oc～100 ℃, in reaction mixture, solid materials is controlled at 10～50% by mass percentage, treatment time is controlled at 0.5～2.0 hour, by the advantage of thermokalite water law, be that clearance to protein is up to more than 90%, but relate to the use of a large amount of soda acids and relative high temperature, in the enzyme facture, enzyme is Sumizyme MP, zytase, phytase, cellulase, at least one in the complex polysaccharide enzyme, solid materials is 1:10～1:20 to the ratio of water, temperature of reaction is 40～60 ℃, time is 0.5～2.0 hour, the clearance 80%～90% of protein, the mild condition of enzyme facture, clean, environmental protection, but the clearance to protein is slightly low, the reaction mixture that to process in order to upper method filters, filter cake is with 1N salt acid elution, again with deionized water wash, suction filtration, be less than 2% with the Kjeldahl nitrogen determination protein content.
Chemical theory of the present invention is based on the reaction that Starch Hydrolysis in rice bran becomes glucose:
Glucose syrup product purity and quality by the inventive method gained are high, and after testing, products obtained therefrom reaches high DE value (> 60% in national glucose syrup quality standard (GB/T20885-2007)) standard.Also can obtain the glucose crystal product through further processing step crystallization, according to other quality standard of different application level, produce chemical grade, food grade and pharmaceutical grade glucose elaboration.
It is starting raw material that the present invention utilizes aboundresources and inexpensive rice bran, after extracting the rice bran grease, by enzyme transforming process, incites somebody to action wherein and manufactures glucose syrup after starch liquefacation and saccharification.
The present invention is non-grain working system, has saved a large amount of grain resources.The leftover materials that rice bran prepares glucose syrup also can be used to the preparation of feed or for microorganism fermented substrate etc.The agricultural-food rice bran obtains the utilization of greatly rising in value thus.Therefore the present invention, for rationally utilizing mankind's grain resource, ensures people's livelihood basic need, promotes development and the loop economy of Grain Industry that profound significance is arranged.
embodiment:
Embodiment 1:
The present embodiment 1 be take rice bran as raw material prepares the method for glucose syrup, comprises and lower step:
1) quality control of raw rice bran and pre-treatment:
Get rice bran 5.0 Kg, the mechanical impurity in the removing rice bran, ash content, foreign matter etc., check that raw material is without rotten corrupt, without mould.Then raw material is made to suitable pulverization process, obtain 100 order homogeneous materials.Measure starch content 21% with Iodine colorimetry, with Kjeldahl nitrogen determination protein content 12.5%, moisture 11.2%.Obtain the approximately pretreated rice bran of 4.8 Kg.
2) rice bran skimming treatment:
By pretreated rice bran 4.8 Kg with 5 liters of food grade normal hexanes in soaking at room temperature 10 hours.Gentle agitation between soak period.After soaking the full time, filter.Filter residue soaks 5 hours in the room temperature gentle agitation with 5 liters of normal hexanes again.Filter, and be filtered dry solvent as far as possible, then filter cake room temperature in Fume Hoods is volatilized to residual normal hexane.Obtain rice bran meal (defatted rice bran) 4.2 Kg.
3) the thermokalite aqua-solution method is removed protein and other water solubles matter in rice bran meal:
Get 1.0 Kg defatted rice brans, add 8 liters of deionized waters, with 10% NaOH solution, be adjusted to pH value 12, process 2 hours in 80 ℃ of temperature gentle agitation.Regulate and control pH value 11-12 with 10% NaOH solution therebetween.Afterwards reactant is chilled to room temperature, filters.Filter cake is with 1N salt acid elution, then with deionized water wash near neutral, drain as far as possible, room temperature volatilizes, and obtains rice bran meal 0.95 Kg.Be less than 1% with the Kjeldahl nitrogen determination protein content.Standby.
4) the enzymatic liquefaction of rice bran meal and saccharification react
The deionized water that the above rice bran meal of processing through alkaline process 0.8 Kg is added to suitable proportion, the mixture that the ratio that obtains solid materials and water is 1:1, stir, and with dilute hydrochloric acid, adjusts pH to 6.0, adds 1.6 gram CaCl
2, then 5 milliliters of high temperature α-amylase are added in this mixtures of materials to (every for the gram raw material 6～8 units of enzyme), after fully mixing, be heated to 90
oc, liquefaction reaction 2 hours.Reaction solution is cooled to room temperature, filters, filtrate is in 60
oc hot water bath, through being evaporated to 50% of original volume, obtains maltodextrin solution.Add 3 gram saccharifying enzyme in the gained maltodextrin solution, stir, adjust pH 4.5, in 60
oc insulation reaction 48 hours, check into negative to dextrin.
5) glucose syrup decolouring and purifying:
Add the gac reaction solution in step 4) in right amount, stir decolouring in 0.5～2.0 hour, with thin glass hourglass bucket, remove by filter gac and impurity.Filtrate is used respectively 732 Zeo-karbs and 701 anionite-exchange resin desalinations, and elutriant is finally in 55
oc hot water bath is evaporated to 70%, obtains water white transparency glucose syrup product 250 grams.Products obtained therefrom is measured Reduction of Glucose degree (DE) 98% through Pei Lin reagent method.Product reaches high DE value (> 60% in national glucose syrup quality standard (GB/T20885-2007)) standard.
Embodiment 2:
The present embodiment 2 be take rice bran as raw material prepares the method for glucose syrup, comprises the following steps:
1) quality control of raw rice bran and pre-treatment:
Get rice bran 5.0 Kg, the mechanical impurity in the removing rice bran, ash content, foreign matter etc., check that raw material is without rotten corrupt, without mould.Then raw material is made to suitable pulverization process, obtain 100 order homogeneous materials.Measure starch content 21% with Iodine colorimetry, with Kjeldahl nitrogen determination protein content 12.5%, moisture 11.2%.Obtain the approximately pretreated rice bran of 4.8 Kg.
2) rice bran skimming treatment:
By pretreated rice bran 4.8 Kg with 5 liters of food grade normal hexanes in soaking at room temperature 10 hours.Gentle agitation between soak period.After soaking the full time, filter.Filter residue soaks 5 hours in the room temperature gentle agitation with 5 liters of normal hexanes again.Filter, and be filtered dry solvent as far as possible, then filter cake room temperature in Fume Hoods is volatilized to residual normal hexane.Obtain rice bran meal (defatted rice bran) 4.2 Kg.
3) remove protein and other water solubles matter in rice bran meal with enzyme process
Get 1.0 Kg defatted rice brans, add 8 liters of deionizations, regulate pH 9-11, add 200,000 u/g Sumizyme MPs, after mixing, reactant is in 55
oc insulation 2 hours, then filter, and filter cake is with 1N salt acid elution, then with deionized water filter wash cake near neutral, drain as far as possible, room temperature volatilizes, and obtains rice bran meal 0.98 Kg.Be less than 2% with the Kjeldahl nitrogen determination protein content, standby.
4) the enzymatic liquefaction of rice bran meal and saccharification react:
The deionized water that the above rice bran meal of crossing through enzymatic treatment 0.8 Kg is added to suitable proportion, the mixture that the ratio that obtains solid materials and water is 1:1, stir, and with dilute hydrochloric acid, adjusts pH to 6.0, adds 1.6 gram CaCl
2, then 5 milliliters of high temperature α-amylase are added in this mixtures of materials to (every for the gram raw material 6～8 units of enzyme), after fully mixing, be heated to 90
oc, liquefaction reaction 2 hours.Reaction solution is cooled to room temperature, filters, filtrate is in 60
oc hot water bath, through being evaporated to 50% of original volume, obtains Star Dri 5.Add 3 gram saccharifying enzyme in the gained Star Dri 5, stir, adjust pH 4.5, in 60
oc insulation reaction 48 hours, check into negative to dextrin.
5) glucose syrup decolouring and purifying:
Add the gac reaction solution in step 4) in right amount, stir decolouring in 0.5～2.0 hour, with thin glass hourglass bucket, remove by filter gac and impurity.Filtrate is used respectively 732 Zeo-karbs and 701 anionite-exchange resin desalinations, and elutriant is finally in 55
oc hot water bath is evaporated to 70%, obtains water white transparency glucose syrup product 246 grams.Products obtained therefrom is measured Reduction of Glucose degree (DE) 97.5% through Pei Lin reagent method.Product reaches high DE value (> 60% in national glucose syrup quality standard (GB/T20885-2007)) standard.
Above-described embodiment is that foregoing of the present invention is further described, but this should be interpreted as to the scope of the above-mentioned theme of the present invention only limits to above-described embodiment.All technology realized based on foregoing all belong to scope of the present invention.
Claims (3)
1. the rice bran of take prepares the method for glucose syrup as raw material, the method is to take rice bran as starting raw material, obtain rice bran meal through degreasing, deproteinated and the solubility impurity that anhydrates, rice bran meal becomes Star Dri 5 with high temperature α-catalyzed by amylase through liquefaction reaction, then through saccharifying enzyme catalysis saccharification react, then carry out the desalination bleaching purifying and obtain glucose syrup.
2. as claimed in claim 1ly take rice bran as raw material prepares the method for glucose syrup, it is characterized in that comprising the following steps:
1) take rice bran as starting raw material, to raw materials pretreatment and mensuration: at first remove mechanical impurity, ash content, foreign matter in rice bran, check that raw material is without rotten corrupt, without mould, then raw material is pulverized, obtained 80～200 order homogeneous materials, with Iodine colorimetry, measured starch content 15～30%, with Kjeldahl nitrogen determination protein content 12～17%, moisture 8～15%;
2) pretreated raw rice bran degreasing is removed to Rice pollard oil, obtain rice bran meal;
3) remove protein and the water-soluble impurity in rice bran meal;
4) rice bran meal of above processing is added to the deionized water of suitable proportion, the mixture that the ratio that obtains solid materials and water is 1:1～1:10, stir, and with dilute hydrochloric acid, adjusts pH to 5.0～7.0, adds 0.1%～0.5% CaCl of raw material weight
2, then high temperature α-amylase being added in this mixtures of materials, every 6～8 units of enzyme for the gram raw material, after fully mixing, be heated to 85～95
oc, liquefaction reaction 0.5～2.0 hour, be cooled to room temperature by reaction solution, filters, and filtrate is in 50～80
oc hot water bath, through being evaporated to 25～50% of original volume, obtains maltodextrin solution, and 0.1～1.0% the saccharifying enzyme to adding raw material weight in maltodextrin solution, stir, and adjust pH to 4～5, in 50～70
oc insulation reaction 24～48 hours, check into negative to dextrin;
5) add gac in right amount in above reaction solution, stir decolouring in 0.5～2.0 hour, with thin glass hourglass bucket, remove by filter gac and impurity, filtrate spent ion exchange resin desalination again, elutriant is finally in 50～70
oc hot water bath, through being evaporated to 60%～70%, obtains water white transparency glucose syrup product.
3. as claimed in claim 2ly take rice bran and prepare the method for glucose syrup as raw material, it is characterized in that the method for protein in rice bran meal of removing in step 3) comprises the thermokalite aqueous solution or method of enzymatically treating, the alkali that the thermokalite aqueous process is used is for selecting concentration expressed in percentage by weight 5%～15% NaOH or 5%～15% KOH or 5%～15% LiOH alkaline solution, the pH value is controlled at 9.0～12.0, temperature is controlled at 80～100 ℃, in reaction mixture by weight percentage solid materials be controlled at 10～50%, the treatment time is controlled at 0.5～2.0 hour; In the enzyme facture, enzyme is at least one in Sumizyme MP, zytase, phytase, cellulase, complex polysaccharide enzyme, solid materials is 1:10～1:20 to the ratio of water, temperature of reaction is 40～60 ℃, time is 0.5～2.0 hour, the reaction mixture that to process in order to upper method filters, and filter cake is with 1N salt acid elution, then with deionized water wash, suction filtration, be less than 2% with the Kjeldahl nitrogen determination protein content.
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Cited By (6)
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| CN103361171A (en) * | 2013-08-06 | 2013-10-23 | 四川省农业科学院农产品加工研究所 | Method for preparing rice bran oil, rice bran protein and phytin from rice bran |
| CN103911409A (en) * | 2014-04-09 | 2014-07-09 | 孝感市惠隆油脂有限公司 | Preparation method of malt syrup |
| CN105695532A (en) * | 2016-03-02 | 2016-06-22 | 尹仲荣 | Preparing method for malt sugar |
| CN106434792A (en) * | 2016-11-30 | 2017-02-22 | 无锡甜丰食品有限公司 | Production process of glucose syrup |
| CN106967764A (en) * | 2017-04-11 | 2017-07-21 | 中国科学院青岛生物能源与过程研究所 | A kind of method that two enzymes method hydrolysis rice bran starch prepares fermentation glucose syrup |
| CN110343729A (en) * | 2018-04-02 | 2019-10-18 | 无锡甜丰食品有限公司 | A kind of preparation method of low DE value glucose syrup |
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| CN106967764A (en) * | 2017-04-11 | 2017-07-21 | 中国科学院青岛生物能源与过程研究所 | A kind of method that two enzymes method hydrolysis rice bran starch prepares fermentation glucose syrup |
| CN110343729A (en) * | 2018-04-02 | 2019-10-18 | 无锡甜丰食品有限公司 | A kind of preparation method of low DE value glucose syrup |
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