CN102690360B - Preparation method of corn starch - Google Patents
Preparation method of corn starch Download PDFInfo
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- CN102690360B CN102690360B CN201110071117.5A CN201110071117A CN102690360B CN 102690360 B CN102690360 B CN 102690360B CN 201110071117 A CN201110071117 A CN 201110071117A CN 102690360 B CN102690360 B CN 102690360B
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Abstract
A preparation method of corn starch. The method includes the steps of: soaking niblets; crushing the soaked niblets; separating out germs; grinding niblet tissues containing corn bran and endosperm after degerming; separating out fiber; separating the obtained crude starch milk to obtain gluten water and starch milk; and washing the starch milk. A treatment method of gluten water comprises concentration of the gluten water. The concentration method of gluten water includes the steps of: (1) carrying out a first condensation on gluten water to obtain a first concentrated phase, wherein conditions of the first condensation enable an obtained first water phase to contain less than 0.3 wt% of solid containing protein; and (2) carrying out a second condensation on the first concentrated phase to obtain a second concentrated phase and a second water phase, wherein conditions of the second condensation enable the second concentrated phase to contain more than 10 wt% of solid containing protein. The second concentrated phase obtained by the method of the invention has similar or higher concentration compared with that of a concentrate obtained by a prior art; and water quality of the obtained first water phase is superior.
Description
Technical field
The present invention relates to a kind of preparation method of W-Gum.
Background technology
The leaching process of starch is the process that the chief component of corn grain separates, and the separation of the each integral part of corn grain has two kinds of dry method and wet methods, and lock out operation main be to grind, therefore, have dividing of dry grinding and wet-milling.
Wet-milling is the technique of current corn starch industry universal, is mainly the rear corn of dipping through broken, de-embryo, fine grinding and screening, to separate plumule, fibrous residue, makes the process of rough starch milk.Starch is after mill riddler order is extracted, gained starch milk is still coarse starch milk, still contains a large amount of proteinaceous solid substances and soluble substance, and the concentration of powder slurry is also rarer, need to refine and concentrate, for finally processing and deep processing provides pure smart starch milk.
Refining method is to utilize the principle of centrifugation, and coarse starch milk is separated, and separates light phase and heavy phase, the light water for containing proteinaceous solid substance mutually, i.e. gluten water, heavy phase is starch milk, remove soluble substance remaining in starch milk with pure water washing again, obtain smart starch milk.And isolated gluten water utilizes the method for centrifugation to concentrate again, obtain enriched material and process water, after enriched material is dehydrated, obtain gluten protein powder.The process water that separation obtains, can be back to use in the washing process of technique for soaking corn or starch milk by direct circulation.
But, adopt and again utilize the method for centrifugation to carry out the not enough so that proteinaceous solid substance of concentrated technique to gluten water fully to separate in the preparation method of W-Gum of prior art, separation efficiency is lower, cause the productive rate of gluten protein powder not high, and separate in the process water that obtains and still contain a certain amount of proteinaceous solid substance, not only can cause the productive rate of gluten protein powder to reduce, if process water direct circulation is back to use to technique for soaking corn and plumule, after in fibre washing technique, the immersion effect of corn and quality product also can variation, and affect the quality of smart starch milk.
Summary of the invention
Not the object of the invention is to overcome the productive rate of the gluten protein powder that the treatment process of the gluten water in the preparation method of the W-Gum that adopts prior art obtains high and process water direct circulation is back to use to technique for soaking corn and plumule, after in fibre washing technique, the immersion effect of corn and quality product variation and affect the defect of the quality of smart starch milk, providing a kind of can either improve gluten protein powder productive rate and can directly process water reuse can be improved again to process water cyclically utilizing to the corn soaking effect of technique for soaking corn and cyclically utilizing to plumule, the starch washing effect of fibre washing technique, improve the preparation method of the W-Gum of the quality of smart starch milk.
The present inventor finds, the W-Gum preparation technology who adopts prior art utilizes the not enough so that proteinaceous solid substance of the method for centrifugation fully to separate to gluten water again, separation efficiency is lower, the content of the proteinaceous solid substance in the enriched material therefore obtaining is not high, cause the productive rate of gluten protein powder not high, in addition, in the process water obtaining after concentrated, also contain a large amount of solid substances, if directly process water direct circulation is back to use to technique for soaking corn, because the protein content in process water is higher, therefore cannot fully the soluble protein in corn be soaked out and be dissolved in water, and affect follow-up separating technology, equally, the process water direct circulation that prior art obtains is back to use plumule, after in fibre washing technique, also cannot be fully by plumule, soluble substance in fiber fully washs out, and can affect the quality of product.
To achieve these goals, the invention provides a kind of preparation method of W-Gum, the method comprises soaks corn grain, to carry out fragmentation through the corn grain soaking, isolate plumule, the corn grain tissue that contains maize peel and endosperm after de-embryo is ground, isolate fiber, the coarse starch milk obtaining is separated and obtains gluten water and starch milk, and starch milk is washed, wherein, the treatment process of described gluten water comprises concentrated gluten water, described method concentrated gluten water comprised:
(1) gluten water is carried out to once concentration, obtain the first concentrated phase and the first water, in the first water that the condition of once concentration makes to obtain, the content of proteinaceous solid substance is less than 0.3 % by weight;
(2) the first concentrated phase is carried out to secondary concentration, obtain the second concentrated phase and the second water, in the second concentrated phase that the condition of secondary concentration makes to obtain, the content of proteinaceous solid substance is more than 10 % by weight.
In the preparation method of W-Gum provided by the invention, adopt the method for secondary concentration, first gluten water is carried out to once concentration, in the first water that control obtains, the content of proteinaceous solid substance is lower, then, the first concentrated phase is carried out to secondary concentration, in the second concentrated phase that control obtains, the content of proteinaceous solid substance is higher, thereby realize effective separation of proteinaceous solid substance, after the proteinaceous solid substance in this second concentrated phase is separated and dehydrated, reach the object of the productive rate that greatly improves gluten protein powder.Simultaneously, in the first water that control obtains, the content of proteinaceous solid substance is lower, can also make the first water obtaining reach the requirement of directly getting back to process system use,, by described the first water again reuse circulation corn is soaked and plumule, fiber is washed, can substantially reach and soak and the effect of washing with fresh water.Made up the technique that the method for prior art processes gluten water deficiency so that proteinaceous solid substance can fully separate.Compared with the method for the once concentration of prior art, the concentration of the product that method of the present invention the obtains enriched material that the second concentrated phase (dense seitan) and prior art obtain is suitable, even higher, and the water quality of the first water obtaining is obviously better than the water that the once concentration of prior art obtains, and the volume of the second water that need carry out secondary treatment is relatively little, also more easily process.
Embodiment
According to the present invention, the preparation method of described W-Gum comprises corn grain is soaked, by carrying out fragmentation through the corn grain soaking, isolate plumule, the corn grain tissue that contains maize peel and endosperm after de-embryo is ground, isolate fiber, the coarse starch milk obtaining is separated and obtains gluten water and starch milk, and starch milk is washed, wherein, the treatment process of described gluten water comprises concentrated gluten water, described method concentrated gluten water comprised:
(1) gluten water is carried out to once concentration, obtain the first concentrated phase and the first water, in the first water that the condition of once concentration makes to obtain, the content of proteinaceous solid substance is less than 0.3 % by weight;
(2) the first concentrated phase is carried out to secondary concentration, obtain the second concentrated phase and the second water, in the second concentrated phase that the condition of secondary concentration makes to obtain, the content of proteinaceous solid substance is more than 10 % by weight.
Under preferable case, in step (1), in the first water that the condition of once concentration makes to obtain, the content of proteinaceous solid substance is 0.1-0.3 % by weight; In step (2), in the second concentrated phase that the condition of secondary concentration makes to obtain, the content of proteinaceous solid substance reaches 10-12 % by weight.
The present inventor finds, with in the preparation technology of the W-Gum of prior art, adopt once concentration after obtain enriched material and process water method compare, in the time that gluten water is carried out to once concentration, in the first water that control obtains, the content of proteinaceous solid substance is less than 0.3 % by weight, be preferably 0.1-0.3 % by weight, can first ensure only to contain in the first water a small amount of proteinaceous solid substance, then, when the first concentrated phase obtaining after once concentration is carried out to secondary concentration, in the second concentrated phase that control obtains, the content of proteinaceous solid substance is more than 10 % by weight, be preferably 10-12 % by weight, in the second concentrated phase that has ensured again to obtain, contain a large amount of proteinaceous solid substances, that is to say, after adopting method of the present invention to concentrate gluten water, quality can be obtained simultaneously higher, what the content of proteinaceous solid substance was less can direct reuse water, and without again the water obtaining being carried out to subsequent disposal, obtain directly carrying out the higher concentrated phase of proteinaceous solid content prepared by next step gluten protein powder simultaneously.
According to the present invention, in the first water that control obtains, the content of proteinaceous solid substance is less than 0.3 % by weight, be preferably 0.1-0.3 % by weight, can be by controlling the concentration ratio of the first concentrated phase obtaining when once concentration, the concentration ratio of described the first concentrated phase is the feed volume of once concentration gluten water and the ratio of the first concentrated phase volume; In the first concentrated phase, the concentration of proteinaceous solid substance is lower, so can ensure low percentages of protein in the first water, and therefore, under preferable case, the concentration ratio of the first concentrated phase can be 2-3: 1, and more preferably 2.3-2.8: 1.Vice versa, in the second concentrated phase that control obtains, the content of proteinaceous solid substance is more than 10 % by weight, be preferably 10-12 % by weight, can be by controlling the concentration ratio of the second concentrated phase obtaining when secondary concentration, the feed volume of described secondary concentration the first concentrated phase and the ratio of the second concentrated phase volume; In the second water, the concentration of proteinaceous solid substance is higher, can ensure that in the second concentrated phase, protein content is higher, and therefore, under preferable case, the concentration ratio of the second concentrated phase can be 3-4: 1, and more preferably 3.3-3.7: 1.
According to the present invention, can be various concentrated mode well known in the art by method concentrated gluten water, for example, utilize the principle of centrifugation, adopt separating machine that gluten water is concentrated, enriched material flows out from underflow, and process water flows out from top stream.Therefore, the method for the invention preferably adopts the method for centrifugation to carry out described once concentration and described secondary concentration.
According to the present invention, concentrated condition generally comprises the rotating speed of centrifugation and the temperature of feed rate and centrifugation etc., the adjustable extent of above-mentioned condition is all wider, also be, the condition of once concentration is as long as ensure proteinaceous solid content in the first water, and preferably the condition of once concentration makes the concentration ratio of the first concentrated phase in the preferred scope of the present invention; Meanwhile, the condition of secondary concentration is as long as ensure the content of proteinaceous solid substance in the second concentrated phase, and preferably the condition of secondary concentration makes the concentration ratio of the second concentrated phase in the preferred scope of the present invention.Due to size, the diameter difference of different centrifugal separation equipments, rotating speed is also just different, therefore, can select according to the actual needs suitable equipment, and its rotating speed has also been determined with regard to corresponding, also just can have been selected according to actual needs suitable inlet amount simultaneously.The temperature of centrifugation can be generally 35-45 DEG C.
The method of the proteinaceous solid substance in described separation the second concentrated phase can adopt ordinary method known in those skilled in the art, for example, can be carried out solid-liquid separation or directly be carried out filtering separation by whizzer.Its concrete operation method and condition are conventionally known to one of skill in the art, here repeat no more.For example, in the specific embodiment of the present invention, can adopt plate-and-frame filter press to filter, the condition of filtration comprises sheet frame veneer model 125cm × 125cm, sheet frame maximum working pressure (MWP) 0.4Mpa, veneer filter-cloth filtering area is generally 1.5 square metres, 758 model filter clothes.
According to the present invention, the method also comprises isolated proteinaceous solid substance from the second concentrated phase the step that dehydrates.
The described method dehydrating and condition all can adopt method well known in the art and condition to carry out.For example, dry mode can be seasoning, forced air drying, the drying mode of the various routines such as vacuum-drying.Described dry condition can comprise that drying temperature is more than 100 DEG C, as 100-150 DEG C; Can be 0.5-1.5 hour time of drying.
In the present invention, the light water that contains mutually proteinaceous solid material that described gluten water obtains after referring to the Corn Crude starch milk to separate.
According to the present invention, the method that corn grain is soaked can adopt the method for well known to a person skilled in the art, for example, at 50-55 DEG C, the sulfurous acid aqueous solution that is 0.1-0.5 % by weight by corn particle and concentration contacts 48-52 hour.Can make its each integral part loose with sulfurous acid soaking corn grain, weaken mutual contact, sulfurous acid can also destroy protein net, make the semipermeable partition of corn grain epidermis become permeable membrane, accelerate and promote to permeate and diffusion, make a large amount of water absorption and swellings of corn grain, softening, great amount of soluble protein dissolution can further be processed into corn steep liquor in soak solution.
According to the present invention, to take off embryo through the corn grain soaking, and the method for isolating plumule also can be carried out according to the method for well known to a person skilled in the art, for example, utilize corn degerming mill (TCM920), the corn grain that makes to enter degerming mill enters with the moving of double wedge under the effect of centrifugal force to be determined between tooth plate, because two dishes are for the relative rotation, and recessed tooth is interior and dredges outer closely on dish, and maize germ, scurf and endosperm are because physical property difference is by fragmentation in various degree, separated from one another.Different due to the relative density of plumule and rest part, under the effect of centrifugal force, free plumule is separated.
According to the present invention, the corn grain tissue that contains maize peel and endosperm after de-embryo is ground, isolating the method for fiber also can carry out according to the method for well known to a person skilled in the art, for example, utilize the impact grinding of pin type to grind, be subject to moving pin and fixed strong shock the in repeated multiple times ground of determining pin of high speed rotating, most starch and fiber get loose and dissociate out.Thickness slag ratio can be generally 2.5-3: 1.Although the starch after grinding has been unbound state, but still mix with fibrous residue, due to varying in size of several material particles, the screening plant that therefore, can utilize different pore size by fiber by separating in farinaceous size, in described farinaceous size, the size of starch granules is generally 3-30 micron, in fibrous residue, the granular size of fine-fibered is generally more than 65 microns, and robust fibre slag becomes larger sheet, and seitan granular size is generally 1-2 micron.Described screening plant can be various screening plants, for example, and trommel, oscillating flat sieve, centrifugal screen etc.
According to the present invention, the coarse starch milk obtaining is separated and obtains gluten water and starch milk, and the method that starch milk is washed can be carried out for method well known in the art.For example, the principle that starch milk separates with seitan mainly utilize the relative density of these two kinds of materials and granular size different and separate, for example, can adopt settling process or centrifuging to separate.
To be further described in detail the present invention by specific embodiment below, following examples are only for the present invention is described, but are not used for limiting the scope of the invention.
In following embodiment, adopt disc separator gluten water is concentrated or carry out solid-liquid separation, concentrated phase flows out from underflow, and water flows out from top stream; The model of disc-type separating centrifuge used is SDA260.
In the water obtaining after gluten water is concentrated, the measuring method of the concentration of proteinaceous solid substance is Oven Method.
Adopt GB/T 5009.5-1985 to measure the protein content in the feed obtaining after filtration cakes torrefaction (taking the butt of feed as benchmark).
Embodiment 1
The present embodiment is for illustrating the preparation method of W-Gum provided by the invention.
(1) raw materials pretreatment
Maize raw material (water content 14 % by weight) is carried through chapelet and is entered successively receiving sieve, tramp iron separator, the cleaning sections such as stone, magnetic separation are screened, remove in plane rotation cleaning;
(2) soak
After corn after purification is measured, carry and remove infusion system by waterpower, carry out adverse current immersion with the sulfurous acid aqueous solution (mass percent concentration is 0.35 % by weight).Soaking filling is 10, in 10 steeping tanks, adds respectively 50 tons of maize raw materials after above-mentioned purification, and wherein, steeping tank series connection is communicated with successively, and the time of immersion is 48 hours, and the temperature of immersion is 50 ± 2 DEG C;
(3) de-embryo
Corn after soaking is entered to wet corn hopper by wet corn transferpump through rockover remover, enter again one-level degerming mill, corn is broken into 4-6 lobe, be no more than 1 % by weight containing shaping corn amount, and separate the plumule of the 75-89 % by weight of plumule total amount, discharge the starch of the 20-25 % by weight of total starch content simultaneously;
Corn after fragmentation is pumped to plumule primary cyclone with plumule, the plumule that flow out at separator top removes washing system, underflow thing enters secondary degerming mill, corn is broken for 10-12 lobe, in this slurry, not containing whole kernel corn, be no more than 0.3 % by weight in the plumule of bonding state, be pumped into secondary plumule cyclone separator through the slurry of secondary breaking through plumule, top stream thing reenters one-level germ separation device, and underflow slurry enters fine grinding operation;
(4) grind
The underflow grout of isolating after plumule through swirl flow separator passes through pressure curved sieve, and screen underflow is coarse starch milk; Screen overflow enters impact grinding (or pin mill) and carries out fine grinding, and free out with the free starch that makes to greatest extent itself and fiber connect, the condition of pin mill makes in the slurry after grinding, and connects starch and is not more than 10 % by weight;
Slurry after fine grinding enters fibre washing bath, delivers to first step pressure curved sieve at this with together with the washing water of later washing the fibre.Screen underflow is isolated coarse starch milk, screen overflow is again through the countercurrent washing of the bent sieve of 6 stage pressures, washing process water adds from last step sieve, by compass screen surface, is carrying the free starch washing and is moving forward step by step, until in the front rinse bath of first step sieve, merge with the slurry after fine grinding, jointly enter first step pressure curved sieve, separate coarse starch milk, the screen underflow coarse starch milk that this starch milk and fine grinding fore worker separate converges, and enters starch separation circuit.Fiber, skin slag and washing water on compass screen surface are gone against the stream, and from the first sieve to each sieve is mobile later, through washing after screening several times, discharge from the bent sieve of last step, then dewater through screw extrusion press;
(5) starch milk is refining
Remove after impurity through sand separator, revolving filter from the thick starch obtaining from bent screening before and after fine grinding, enter elementary separating centrifuge (disc separator), the overflow substance that top stream is discharged is rare gluten water, and this rare gluten water is carried out to following processing:
(1) press 350m
3the total flux of/h is on average sent into rare gluten water (concentration of proteinaceous solid substance is 1.7 % by weight) and in two disc separators, rare gluten water is carried out to once concentration simultaneously (total feed of rare gluten water is 350m
3/ h, each inlet amount is 175m
3/ h, the rotating speed of centrifugation is respectively 3400 revs/min, the temperature of centrifugation is 45 DEG C), the total flux that obtains the first water is 200m
3the total flux of/h (in the first water, the content of proteinaceous solid substance is 0.3 % by weight) and the first concentrated phase is 150m
3(the concentrated phase flow of each separating machine is respectively 75m to/h
3/ h) (in the first concentrated phase, proteinaceous solid content is 3.8 % by weight); The first concentrated phase is again sent into and in a disc separator, carried out secondary concentration (feed rate of the first concentrated phase is 150m
3/ h, the rotating speed of centrifugation is 3500 revs/min, the temperature of centrifugation is 45 DEG C), obtaining the second water flow is 106m
3/ h and the second concentrated phase flow are 44m
3/ h (in the second concentrated phase, proteinaceous solid content is 12.1 % by weight);
(2) the second concentrated phase step (1) being obtained is inserted in flame filter press and is filtered, and obtains filter cake (moisture 50 % by weight); The filter cake obtaining is obtained to feed (moisture content 10 % by weight) 120 DEG C of oven dry, obtain protein content in feed as 62% (m/m) taking butt instrumentation;
The starch concentration obtaining from elementary separating centrifuge underflow is 19-20 ° of Be ', and moisture approximately 60 % by weight of purified starch breast after the washing of 12 grades of swirlers, protein content is less than 0.35 % by weight, essence starch milk obtains the wet starch of moisture 38-40 % by weight after dehydration, and wet starch is sent into pneumatic drier and is dried to commodity starch finished product.
Embodiment 2
The present embodiment is for illustrating the preparation method of W-Gum provided by the invention.
Method according to embodiment 1 is prepared W-Gum, different, and the treatment process of described rare gluten water comprises:
(1) press 380m
3the total flux of/h is on average sent into rare gluten water (concentration of proteinaceous solid substance is 1.5 % by weight) and in two disc separators, rare gluten water is carried out to once concentration simultaneously (total feed of rare gluten water is 380m
3/ h, each inlet amount is 190m
3/ h, the rotating speed of centrifugation is respectively 3300 revs/min, the temperature of centrifugation is 45 DEG C), the total flux that obtains the first water is 234m
3the total flux of/h (in the first water, the content of proteinaceous solid substance is 0.28 % by weight) and the first concentrated phase is 146m
3(the concentrated phase flow of each separating machine is respectively 73m to/h
3/ h) (in the first concentrated phase, proteinaceous solid content is 3.5 % by weight); The first concentrated phase is again sent into and in a disc separator, carried out secondary concentration (feed rate of the first concentrated phase is 146m
3/ h, the rotating speed of centrifugation is 3400 revs/min, the temperature of centrifugation is 45 DEG C), obtaining the second water flow is 102m
3/ h and the second concentrated phase flow are 44m
3/ h (in the second concentrated phase, proteinaceous solid content is 11 % by weight);
(2) the second concentrated phase step (1) being obtained is inserted in flame filter press and is filtered, and obtains filter cake (moisture 50 % by weight); The filter cake obtaining is obtained to feed (moisture content 10 % by weight) 120 DEG C of oven dry, obtain protein content in feed as 60% (m/m) taking butt instrumentation.
Embodiment 3
The present embodiment is for illustrating the preparation method of W-Gum provided by the invention.
Method according to embodiment 1 is prepared W-Gum, different, and the treatment process of described rare gluten water comprises:
(1) press 360m
3the total flux of/h is on average sent into rare gluten water (concentration of proteinaceous solid substance is 1.6 % by weight) and in two disc separators, rare gluten water is carried out to once concentration simultaneously (total feed of rare gluten water is 360m
3/ h, each inlet amount is 180m
3/ h, the rotating speed of centrifugation is respectively 3300 revs/min, the temperature of centrifugation is 45 DEG C), the total flux that obtains the first water is 231m
3the total flux of/h (in the first water, the content of proteinaceous solid substance is 0.31 % by weight) and the first concentrated phase is 129m
3(the concentrated phase flow of each separating machine is respectively 64.5m to/h
3/ h) (in the first concentrated phase, the content of proteinaceous solid substance is 3.9 % by weight); The first concentrated phase is again sent into and in a disc separator, carried out secondary concentration (feed rate of the first concentrated phase is 129m
3/ h, the rotating speed of centrifugation is 3400 revs/min, the temperature of centrifugation is 45 DEG C), obtaining the second water flow is 92m
3/ h and the second concentrated phase flow are 37m
3/ h (in the second concentrated phase, the content of proteinaceous solid substance is 12.3 % by weight);
(2) the second concentrated phase step (1) being obtained is inserted in flame filter press and is filtered, and obtains filter cake (moisture 50 % by weight); The filter cake obtaining is obtained to feed (moisture content 10 % by weight) 120 DEG C of oven dry, obtain protein content in feed as 61% (m/m) taking butt instrumentation.
Embodiment 4
The present embodiment is for illustrating the preparation method of W-Gum provided by the invention.
Method according to embodiment 1 is prepared W-Gum, different, and the treatment process of described rare gluten water comprises:
(1) press 380m
3the total flux of/h is on average sent into rare gluten water (concentration of proteinaceous solid substance is 1.7 % by weight) and in two disc separators, rare gluten water is carried out to once concentration simultaneously (total feed of rare gluten water is 380m
3/ h, each inlet amount is 190m
3/ h, the rotating speed of centrifugation is respectively 3300 revs/min, the temperature of centrifugation is 45 DEG C), the total flux that obtains the first water is 228m
3the total flux of/h (in the first water, the content of proteinaceous solid substance is 0.29 % by weight) and the first concentrated phase is 152m
3(the concentrated phase flow of each separating machine is respectively 76m to/h
3/ h) (in the first concentrated phase, the content of proteinaceous solid substance is 3.8 % by weight); The first concentrated phase is again sent into and in a disc separator, carried out secondary concentration (feed rate of the first concentrated phase is 152m
3/ h, the rotating speed of centrifugation is 3400 revs/min, the temperature of centrifugation is 45 DEG C), obtaining the second water flow is 110m
3/ h and the second concentrated phase flow are 42m
3/ h (in the second concentrated phase, solid content is 11.8 % by weight);
(2) the second concentrated phase step (1) being obtained is inserted in vacuum-type drum filter and is filtered, and obtains filter cake (moisture 50 % by weight); The filter cake obtaining is obtained to feed (moisture content 10 % by weight) 120 DEG C of oven dry, obtain protein content in feed as 61% (m/m) taking butt instrumentation.
Comparative example 1
This comparative example is used for the preparation method of the W-Gum that prior art is described.
Method according to embodiment 1 is prepared W-Gum, different, and the treatment process of described rare gluten water comprises:
(1) press 350m
3the flow of/h is on average sent into total rare gluten water (proteinaceous solid concentration is 1.7 % by weight) and in two disc separators, gluten water is concentrated that (the combined feed total feed flow of gluten water is 350m simultaneously
3/ h, each inlet amount is 175m
3/ h, the rotating speed of centrifugation is respectively 3300 revs/min, the temperature of centrifugation is 45 DEG C), the total flux that obtains process water is 310m
3(the process water flow of each separating machine is 155m to/h
3/ h) total flux of (in process water, proteinaceous solid content is 0.76 % by weight) and enriched material is 40m
3(the enriched material flow of each separating machine is 20m to/h
3/ h) (in enriched material, proteinaceous solid content is 9 % by weight);
(2) enriched material step (1) being obtained is inserted in flame filter press and is filtered, and obtains filter cake (moisture 50 % by weight); The filter cake obtaining is obtained to feed (moisture content 10 % by weight) 120 DEG C of oven dry, obtain protein content in feed as 55% (m/m) taking butt instrumentation.
Contrast by above-described embodiment 1-4 and comparative example 1 can be found out, adopt the preparation method of W-Gum of the present invention effectively to concentrate gluten water, and be met the process water (in the first water, proteinaceous solid content is less than 0.3 % by weight) of direct reuse standard simultaneously and contain the enriched material that proteinaceous solid content is higher (in the second concentrated phase, proteinaceous solid content is greater than 11 % by weight), on the one hand, process water again reuse circulation soaks corn and to plumule, fiber washs, on the other hand, can improve the productive rate of gluten protein powder.
Claims (7)
1. the preparation method of a W-Gum, the method comprises soaks corn grain, by carrying out fragmentation through the corn grain soaking, isolate plumule, the corn grain tissue that contains maize peel and endosperm after de-embryo is ground, isolate fiber, the coarse starch milk obtaining is separated and obtains gluten water and starch milk, and starch milk is washed, it is characterized in that, the treatment process of described gluten water comprises concentrated gluten water, described method concentrated gluten water comprised:
(1) gluten water is carried out to once concentration, obtain the first concentrated phase and the first water, in the first water that the condition of once concentration makes to obtain, the content of proteinaceous solid substance is less than 0.3 % by weight; It is 2-3:1 that the condition of once concentration makes the concentration ratio of the first concentrated phase, and the concentration ratio of described the first concentrated phase is the feed volume of once concentration gluten water and the ratio of the first concentrated phase volume;
(2) the first concentrated phase is carried out to secondary concentration, obtain the second concentrated phase and the second water, in the second concentrated phase that the condition of secondary concentration makes to obtain, the content of proteinaceous solid substance is more than 10 % by weight; It is 3-4:1 that the condition of secondary concentration makes the concentration ratio of the second concentrated phase, and the concentration ratio of described the second concentrated phase is the feed volume of secondary concentration the first concentrated phase and the ratio of the second concentrated phase volume.
2. method according to claim 1, wherein, in the first water that the condition of once concentration makes to obtain, the content of proteinaceous solid substance is 0.1-0.3 % by weight, and in the second enriched material that the condition of secondary concentration makes to obtain, the content of proteinaceous solid substance is 10-12 % by weight.
3. method according to claim 1 and 2, wherein, it is 2.3-2.8:1 that the condition of once concentration makes the concentration ratio of the first concentrated phase.
4. method according to claim 1 and 2, wherein, it is 3.3-3.7:1 that the condition of secondary concentration makes the concentration ratio of the second concentrated phase.
5. method according to claim 1 and 2, wherein, the method for once concentration and secondary concentration is the method for centrifugation.
6. method according to claim 1, wherein, the method also comprises the step that isolated proteinaceous solid substance dehydrates from the second concentrated phase.
7. method according to claim 1, wherein, the method that corn grain is soaked is included at 50-55 DEG C, and the sulfurous acid aqueous solution that is 0.1-0.5 % by weight by corn particle and concentration contacts 48-52 hour.
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| CN103059145A (en) * | 2012-12-22 | 2013-04-24 | 泰安弘兴玉米开发有限公司 | Method for producing corn protein powder |
| CN103755818B (en) * | 2013-12-26 | 2016-05-04 | 河南天豫薯业股份有限公司 | A kind of starch from sweet potato removal of impurities production technology |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0848014A2 (en) * | 1996-12-13 | 1998-06-17 | Costimex S.A. | Process for producing maize starch |
| JP2868818B2 (en) * | 1990-01-08 | 1999-03-10 | 日本食品化工株式会社 | Treatment of corn starch extraction residue |
| CN101885779A (en) * | 2010-06-30 | 2010-11-17 | 潍坊盛泰药业有限公司 | Method for recycling process water in production of cornstarch |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2868818B2 (en) * | 1990-01-08 | 1999-03-10 | 日本食品化工株式会社 | Treatment of corn starch extraction residue |
| EP0848014A2 (en) * | 1996-12-13 | 1998-06-17 | Costimex S.A. | Process for producing maize starch |
| CN101885779A (en) * | 2010-06-30 | 2010-11-17 | 潍坊盛泰药业有限公司 | Method for recycling process water in production of cornstarch |
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