CN109549038A - The technique for comprehensively utilizing sweet potato multistage coproduction starch and juice being concentrated - Google Patents
The technique for comprehensively utilizing sweet potato multistage coproduction starch and juice being concentrated Download PDFInfo
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- CN109549038A CN109549038A CN201811628061.7A CN201811628061A CN109549038A CN 109549038 A CN109549038 A CN 109549038A CN 201811628061 A CN201811628061 A CN 201811628061A CN 109549038 A CN109549038 A CN 109549038A
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
- A23L2/02—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation containing fruit or vegetable juices
- A23L2/04—Extraction of juices
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
- A23L2/02—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation containing fruit or vegetable juices
- A23L2/08—Concentrating or drying of juices
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
- A23L2/02—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation containing fruit or vegetable juices
- A23L2/08—Concentrating or drying of juices
- A23L2/082—Concentrating or drying of juices by membrane processes
- A23L2/087—Concentrating or drying of juices by membrane processes by ultrafiltration, microfiltration
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
- A23L2/70—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter
- A23L2/72—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter by filtration
- A23L2/74—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter by filtration using membranes, e.g. osmosis, ultrafiltration
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
- A23L2/70—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter
- A23L2/84—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter using microorganisms or biological material, e.g. enzymes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B30/00—Preparation of starch, degraded or non-chemically modified starch, amylose, or amylopectin
- C08B30/04—Extraction or purification
Abstract
The invention belongs to food processing technology fields, and in particular to a kind of technique of comprehensive utilization sweet potato multistage coproduction starch and concentration juice.The technique includes the steps that following: (1) sweet potato raw material cleaning draining is broken；(2) plus water, stirring are filtered；(3) coarse filtration liquid is centrifugated, wet starch drying；Supernatant is mixed with sweet potato raw material continues that coarse filtration liquid and sweet potato dregs are made；(4) sweet potato dregs add pure water and α-alpha-amylase are added and digest to obtain the turbid juice I of sweet potato；(5) acid adding in the turbid juice I of sweet potato obtains the turbid juice II of sweet potato through secondary enzymolysis；(6) the turbid juice II of ultrafiltration sweet potato；(7) sweet potato juice is concentrated under vacuum, is sterilized, obtained sweet potato and clear juice products are concentrated.Present invention process is simple, strong operability, and product market acceptance is high, avoids the byproduct complex process of part research, the not high disadvantage of product market acceptance, and discharge of wastewater is greatly reduced, has saved production cost.
Description
Technical field
The invention belongs to food processing technology fields, and in particular to a kind of comprehensive utilization sweet potato multistage coproduction starch and concentration
The technique of juice.
Background technique
Since the amyloid Additional Value of Commodities of sweet potato is high, about the production of field of food sweet potato starch, mostly use greatly at present
Technique be by sweet potato it is broken after elute repeatedly, collect starch.This traditional processing method can generate a large amount of industrial wastewater
It is difficult to handle, handles these waste water and biggish sewage treatment is not only needed to invest, it is also necessary to more time and complicated processing
Technique.Currently, being directed to this industry problem, the country has many scholars and studies, and relevant report mainly has to be mentioned using waste water
Take protein, production microbial oil, polysaccharide or lactic acid.These processing methods not only complex process, puts into larger, and still has portion
Divide by-product that can not utilize, does not still solve the problems, such as its wastewater treatment hardly possible fundamentally.
CN106551309A discloses a kind of sweet potato processing and utilization method, which comprises the following steps:
1) sweet potato slurry preparation: sweet potato being cleaned, crushed 80 meshes, obtains sweet potato slurry；
2) sweet potato plasm scouring:
A, the slurry of sweet potato made from step 1) is transferred to the spray washing device that filter opening diameter is 100~120 μm, with mother liquor I
Or mother liquor II spray washing 0.1~20 minute, isolated sweet potato dregs I and sweet potato starch solution I；
B, sweet potato starch solution I is centrifugally separating to obtain sweet potato starch I and mother liquor I, mother liquor I return step a is for spraying
Wash sweet potato slurry；
C, step a and b are repeated, until solid concentration reaches 4~15w/v% in mother liquor I, using mother liquor I as sweet potato
Health-care efficacy constituents extraction liquid；
3) sweet potato dregs wash:
A, sweet potato dregs I is transferred to the spray washing device that filter opening diameter is 100~120 μm, with mother liquor II or starch washing
Water spray washs 0.1~20 minute, isolated sweet potato dregs II and sweet potato starch solution II；
B, sweet potato starch solution II is centrifugally separating to obtain sweet potato starch II and mother liquor II, mother liquor II return step a is used for
Spray washing sweet potato dregs I；
C, step a and b are repeated, until solid concentration reaches 0.5~4w/v% in mother liquor II, mother liquor II is returned sweet
The step a of potato plasm scouring is starched for spray washing sweet potato；
4) starch washing: sweet potato starch I and sweet potato starch II is merged, and the water agitator treating of 1~5 times of weight is added, from
The isolated sweet potato starch of the heart and starch washing water, the step a that starch washing water returns to sweet potato dregs washing are sweet for spray washing
Potato slag I.
CN105054079A discloses a kind of sweet potato processing and utilization method, it is characterised in that:
Include the following steps:
1), Raw material processing: sweet potato is cleaned, and crushed 20~80 meshes, obtains sweet potato slurry, separating starch；The separating starch
Operation it is as follows:
A, sweet potato slurry is transferred to the spray washing centrifuge or extruding-desiccation machine or sieve de- that filter opening is 400~150 mesh
The water that 0.2-5 times of sweet potato quality of spray is measured while water dispenser, centrifugation or extruding or screening, isolated sweet potato dregs and starch
Solution, end of operation obtain a starch solution and primary elution sweet potato dregs；Starch solution separation, obtains crude starch 1
With a starch mother liquor；
B, once elution sweet potato dregs be transferred to filter opening be 200~100 mesh spray washing centrifuge or extruding-desiccation machine or
Person's screening and dewatering machine, centrifugation or squeezes or the water measured of 0.2-5 times of sweet potato quality of spray while screening, obtain sweet potato dregs and
Starch solution, end of operation obtain secondary starch solution and secondary elution sweet potato dregs；The separation of secondary starch solution, obtains starch
Crude product 2 and secondary starch mother liquor；Secondary starch mother liquor in step 1) a for replacing water to be sprayed；
2), starch refines: crude starch 1 and the starch product 2 that step 1) is obtained merges, and is measured with 0.2-5 times of amount of starch
Water clean starch, separation, obtain finished product of starch and starch cleaning water；Starch cleaning water in step 1) b for replacing water to carry out
Spray；
3) it, separates dietary fiber: the secondary elution sweet potato dregs in step 1) being dried, crushes, sieves with 100 mesh sieve, 100 mesh
Below is Rhizoma Dioscoreae esculentae dietary fiber；
Alternatively, homogeneous crosses 400 meshes, filtering or centrifugation, and precipitating is dried by the secondary elution sweet potato dregs in step 1),
400 mesh below are ultra micro Rhizoma Dioscoreae esculentae dietary fiber；
4), separation function extract: a starch mother liquor is concentrated under reduced pressure into solid content 10-80%, spray drying or
80 DEG C of person or less drying are to get sweet potato function extract.
Wherein, filter opening is 200~180 mesh in step 1) a.
Wherein, the water of 0.5~1 times of sweet potato quality amount is sprayed in step 1) a.
Wherein, filter opening is 120~100 mesh in step 1) b
Wherein, the water of 0.5~1 times of sweet potato quality amount is sprayed in step 1) b.
Wherein, the water measured in step 2) with 0.5~1 times of amount of starch cleans starch.
Wherein, in step 1) separation of starch solution separated with secondary starch solution and step 2) described in separation,
Specially centrifugation, filtering or natural subsidence.
The method emphasis of CN106551309A and CN105054079A is to carry out sweet potato starch extraction, repeatedly wash repeatedly
It washs, though starch isolation yield is higher, the waste water finally generated is more；Contain more sugar and albumen, processing in these waste water
Difficulty is big, and processing cost is about 7-10 member/m3, cost of sewage disposal is higher, the final production cost for influencing enterprise.This method is adopted
Extracted with the elution of starch, though sweet potato starch yield is slightly lower, the substances such as remaining starch, sugar, albumen after complex enzyme hydrolysis,
It converts into the soluble solid of sweet potato concentration juice, waste is few, and clear juice products are concentrated by foreign countries such as the U.S. in sweet potato
Market is welcome, and has better added value of product and market prospects.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of comprehensive processing and utilization sweet potato multistage coproduction products
Technique.The technique is by carrying out sweet potato after being crushed, and first water mentions starch, obtains starch product；Water is added to carry out sweet potato dregs again
Alpha-amylase liquefaction, after taking juice tune acid to digest, ultrafiltration obtains sweet potato juice, and sweet potato concentration juice is made after concentrating sterilizing and produces
Product.
The technique of comprehensive processing and utilization sweet potato multistage coproduction product provided by the present invention, includes the steps that following:
It comprehensively utilizes sweet potato multistage coproduction starch and the technique of juice is concentrated, include the steps that following:
(1) sweet potato raw material is subjected to two-stage cleaning and draining, is crushed, obtains broken sweet potato raw material；
(2) water is added in broken sweet potato raw material in step (1), stirs, filtering respectively obtains coarse filtration liquid and sweet potato
Slag；
(3) coarse filtration liquid is centrifugated, obtains supernatant and sweet potato wet starch, sweet potato wet starch is dried, obtain sweet potato
Dried starch；The supernatant obtained after centrifugation is returned to be added in step (2) and be mixed with broken sweet potato raw material, is continued after mixing
It sieves and coarse filtration liquid and sweet potato dregs is made；
(4) sweet potato dregs obtained in step (2) are added pure water and are mixed to get mixed liquor, and α-alpha-amylase is added,
Heating, High-temperature Liquefaction enzymatic hydrolysis, enzymatic hydrolysis cool down after the completion, and juicing obtains the turbid juice I of sweet potato；
(5) acid is added in the turbid juice I of sweet potato after step (4) liquefaction, stirs evenly, pectin lyase is first added thereto
It is digested with glucoamylase, then is separately added into papain and bromelain, secondary enzymolysis obtains the turbid juice II of sweet potato；
(6) by turbid II ultrafiltration of juice of sweet potato after secondary enzymolysis in step (5), sweet potato juice is obtained；
(7) the sweet potato juice in step (6) is concentrated under vacuum, obtains sweet potato and juice is concentrated, it is dense obtains sweet potato for sterilization
Contracting clear juice products.
It is specific that respectively steps are as follows:
(1) sweet potato raw material is subjected to two-stage cleaning and draining, hammer crushing to 20~40 mesh, it is former obtains broken sweet potato
Material；
(2) water is added in broken sweet potato raw material in step (1), broken sweet potato raw material and water quality ratio are 1:
2, after stirring 5~10min, it is filtered by 60 mesh vibrating screen panels, respectively obtains coarse filtration liquid and sweet potato dregs；
(3) coarse filtration liquid is separated using disk plate centrifuge, centrifuge video disc rotating speed is 5000~7500r/min, warp
Supernatant and sweet potato wet starch are obtained after centrifuge separation, dries sweet potato wet starch, and drying temperature is 110~130 DEG C, drying time
For 4~6h, sweet potato dried starch is obtained, dehydrated sweet potato starch water content is 8-15%；
The supernatant obtained after centrifugation is returned in step (2) and is mixed with broken sweet potato raw material, former according to broken rear sweet potato
Material: mass ratio mixing in supernatant=1:1.5~3 continues be sieved obtained coarse filtration liquid and sweet potato dregs after mixing；
(4) pure water of the quality such as the sweet potato dregs addition obtained in step (2) is mixed to get mixed liquor, and α-high temperature is added
Amylase, α-alpha-amylase additional amount account for 1~the 3 ‰ of mixed liquor quality；90~97 are heated to using tube heater
DEG C, High-temperature Liquefaction digests 0.8~1.2h, is cooled to 45~55 DEG C after the completion of enzymatic hydrolysis, carries out pressure extracting juice using type juice extractor
Afterwards, the turbid juice I of sweet potato after being liquefied, the crushing juice rate of the turbid juice I of sweet potato is about 55-60%, and soluble solid is about 13-14 °
Brix；
(5) citric acid is added in the turbid juice I of sweet potato of step (4), stirs evenly, fruit then is added in the turbid juice I of sweet potato
Glue lyases and glucoamylase digest 25~35min；It is separately added into papain and bromelain secondary enzymolysis again
8~15min, the turbid juice II of sweet potato after obtaining secondary enzymolysis；
Wherein: citric acid accounts for 0.5~the 0.6 ‰ of the turbid juice total weight of sweet potato；
Pectin lyase accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
Glucoamylase accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
Papain accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
Bromelain accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
(6) the turbid juice II of sweet potato after secondary enzymolysis in step (5) being subjected to ceramic membrane ultrafitration, ceramic membrane aperture is 100nm,
Sweet potato juice is obtained, its soluble solid is about 14-15 ° of Brix in sweet potato juice；
(7) the sweet potato juice in step (6) being pumped into single effect evaporator and is concentrated, thickening temperature is 65~75 DEG C,
Vacuum degree is -0.1MPa, and the sweet potato that concentration obtains 60~65 ° of Brix is concentrated juice, sterilizes through 92~95 DEG C, obtains sweet potato concentration
Clear juice products.
Preferably, the technique of above-mentioned comprehensive utilization sweet potato multistage coproduction starch and concentration juice, includes the following steps:
(1) sweet potato raw material is subjected to two-stage cleaning and draining, hammer crushing to 20~40 mesh, it is former obtains broken sweet potato
Material；
(2) water is added in broken sweet potato raw material in step (1), broken sweet potato raw material and water quality ratio are 1:
2, after stirring 5~10min, it is filtered by 60 mesh vibrating screen panels, respectively obtains coarse filtration liquid and sweet potato dregs；
(3) coarse filtration liquid is separated using disk plate centrifuge, centrifuge video disc rotating speed is 5000~7500r/min, warp
Supernatant and sweet potato wet starch are obtained after centrifuge separation, dry sweet potato wet starch, drying temperature is 120 DEG C, drying time 5h,
Sweet potato dried starch is obtained, dehydrated sweet potato starch water content is 10%；
The supernatant obtained after centrifugation is returned in step (2) and is mixed with broken sweet potato raw material, former according to broken rear sweet potato
Material: the mixing of supernatant=1:2 mass ratio continues be sieved obtained coarse filtration liquid and sweet potato dregs after mixing；
(4) pure water of the quality such as the sweet potato dregs addition obtained in step (2) is mixed to get mixed liquor, and α-high temperature is added
Amylase, α-alpha-amylase additional amount account for 1~the 3 ‰ of mixed liquor quality；95 DEG C are heated to using tube heater, height
Temperature liquefaction enzymatic hydrolysis 1h, enzymatic hydrolysis is cooled to 50 DEG C after the completion, sweet after being liquefied after carrying out pressure extracting juice using type juice extractor
The turbid juice I of potato；
(5) citric acid is added in the turbid juice I of sweet potato of step (4), stirs evenly, fruit then is added in the turbid juice I of sweet potato
Glue lyases and glucoamylase digest 30min；It is separately added into papain and bromelain secondary enzymolysis again
10min, the turbid juice II of sweet potato after obtaining secondary enzymolysis；
Wherein: citric acid accounts for 0.5~the 0.6 ‰ of the turbid juice total weight of sweet potato；
Pectin lyase accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
Glucoamylase accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
Papain accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
Bromelain accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
(6) the turbid juice II of sweet potato after secondary enzymolysis in step (5) being subjected to ceramic membrane ultrafitration, ceramic membrane aperture is 100nm,
Obtain sweet potato juice；
(7) the sweet potato juice in step (6) being pumped into single effect evaporator and is concentrated, thickening temperature is 65~75 DEG C,
Vacuum degree is -0.1MPa, and concentration obtains sweet potato and juice is concentrated, and it is 65~70 ° of Brix which, which is concentrated juice, is killed through 92~95 DEG C
Bacterium obtains sweet potato and clear juice products is concentrated.
The beneficial effects of the present invention are:
(1) sweet potato comprehensive processing and utilization technique of the invention is used, can get two kinds of products of multistage coproduction, sweet potato starch
Juice is concentrated with sweet potato；
(2) discharge of wastewater is greatly reduced, only a small amount of sweet potato dregs are discarded, residual sugar amount bottom in sweet potato dregs；Simultaneously also greatly
Reduction enterprise offal treatment cost；It is centrifugated using disk, improves production efficiency, realize continuous production；
In traditional sweet potato starch production process, the high starch yield of pursuit simply, repeatedly elute and settle, generate compared with
More waste water, treatment pressure of sewage are excessive；The sedimentation time is longer simultaneously, and continuous production is poor；
The present invention is by improving sweet potato comprehensive processing and utilization technique, in sweet potato process, it is not necessary to carry out to starch anti-
After backwashing is de-；When handling coarse filtration liquid, using disk centrifugation, prolonged starch sedimentation is not needed, life is improved
Efficiency is produced, ensure that continuous production；
And the supernatant obtained after being centrifugated can carry out back converting utilization with broken sweet potato raw material, be concentrated by evaporation back
The condensed water of receipts can directly carry out mixing utilization with sweet potato dregs, and waste water generation is greatly reduced in the water-saving reuse measure of two steps.
(3) conversion ratio of raw material is improved:
The present invention produces sweet potato by potato slag and juice process portion is concentrated, for remaining starch in potato slag and carbohydrate object
Matter is recycled, and by secondary enzymolysis, by remaining pectin in the turbid juice of sweet potato, starch, albumen is fully converted to soluble solid
Shape object obtains sweet potato concentration clear juice products, realizes multistage coproduction, only a small amount of residual sugar amount is low after ultrafiltration, concentration and sterilization
Sweet potato dregs discharge, substantially emission reduction.
In addition, simple process of the invention, strong operability, product market acceptance is high, avoids the pair of part research
Product Process is complicated, the not high disadvantage of product market acceptance.
Detailed description of the invention
Fig. 1 is the production process route figure of the embodiment of the present invention 1；
Fig. 2 is the finished figure of product sweet potato starch of the invention；
Fig. 3 is the photo of the sweet potato concentration juice after vacuum concentration；
Fig. 4 is the finished figure that juice is concentrated using the sweet potato of present invention process production for sweet potato raw material；
Fig. 5 is that the comparison diagram that 12 ° of Brix are diluted to after juice is placed 30 days is concentrated in the sweet potato of different process processing.
Specific embodiment
The present invention will be further explained combined with specific embodiments below, so that those skilled in the art knows more about
The present invention, but be not intended to limit the present invention.
Embodiment 1
It comprehensively utilizes sweet potato multistage coproduction starch and the technique of juice is concentrated, include the following steps:
(1) sweet potato raw material is subjected to two-stage cleaning and draining, hammer crushing to 40 mesh obtains broken sweet potato raw material；
(2) water is added in broken sweet potato raw material in step (1), broken sweet potato raw material and water quality ratio are 1:
After 2, stir about 10min, it is filtered by 60 mesh vibrating screen panels, respectively obtains coarse filtration liquid and sweet potato dregs；
(3) coarse filtration liquid is separated using disk plate centrifuge, centrifuge video disc rotating speed is 7500r/min, through centrifugation point
From rear acquisition supernatant and sweet potato wet starch, sweet potato wet starch is dried, drying temperature is 120 DEG C, drying time 5h, is obtained sweet
Potato dried starch, dehydrated sweet potato starch water content are 10%；
The supernatant obtained after centrifugation is returned to be added in step (2) and be mixed with broken sweet potato raw material, according to broken rear sweet potato
Raw material: the mixing of supernatant=1:2 mass ratio continues be sieved obtained coarse filtration liquid and sweet potato dregs after mixing；
(4) pure water of the quality such as the sweet potato dregs addition obtained in step (2) is mixed to get mixed liquor, and α-high temperature is added
Amylase, α-alpha-amylase additional amount account for 2 ‰ or so of mixed liquor quality；95 DEG C of left sides are heated to using tube heater
The right side, High-temperature Liquefaction digest 1h or so, are cooled to 50 DEG C after the completion of enzymatic hydrolysis, after carrying out pressure extracting juice using type juice extractor, obtain
The turbid juice I of sweet potato after liquefaction；
(5) citric acid is added in the turbid juice I of sweet potato of step (4), stirs evenly, fruit then is added in the turbid juice I of sweet potato
Glue lyases and glucoamylase digest about 30min；It is separately added into papain and bromelain secondary enzymolysis again about
10min, the turbid juice II of sweet potato after obtaining secondary enzymolysis；
Wherein: citric acid accounts for 0.5 ‰ or so of the turbid juice total weight of sweet potato；
Pectin lyase accounts for 0.2 ‰ or so of turbid I total weight of juice of sweet potato；
Glucoamylase accounts for 0.2 ‰ or so of turbid I total weight of juice of sweet potato；
Papain accounts for 0.2 ‰ or so of turbid I total weight of juice of sweet potato；
Bromelain accounts for 0.2 ‰ or so of turbid I total weight of juice of sweet potato；
(6) the turbid juice II of sweet potato after secondary enzymolysis in step (5) being subjected to ceramic membrane ultrafitration, ceramic membrane aperture is 100nm,
Obtain sweet potato juice；
(7) the sweet potato juice in step (6) is pumped into single effect evaporator and is concentrated, thickening temperature is 70 DEG C, vacuum
Degree is -0.1MPa, and concentration obtains sweet potato and juice is concentrated, and it is 65 ° of Brix which, which is concentrated juice, is sterilized through 92 DEG C, and sweet potato is obtained
Clear juice products are concentrated.
Process route chart in embodiment 1 is as shown in Fig. 1.
Embodiment 2
It comprehensively utilizes sweet potato multistage coproduction starch and the technique of juice is concentrated, include the following steps:
(1) sweet potato raw material is subjected to two-stage cleaning and draining, hammer crushing to 40 mesh obtains broken sweet potato raw material；
(2) water is added in broken sweet potato raw material in step (1), broken sweet potato raw material and water quality ratio are 1:
After 2, stir about 10min, it is filtered by 60 mesh vibrating screen panels, respectively obtains coarse filtration liquid and sweet potato dregs；
(3) coarse filtration liquid is separated using disk plate centrifuge, centrifuge video disc rotating speed is 6000r/min, through centrifugation point
From rear acquisition supernatant and sweet potato wet starch, sweet potato wet starch is dried, drying temperature is 120 DEG C, drying time 5h, is obtained sweet
Potato dried starch, dehydrated sweet potato starch water content are 10%；
The supernatant obtained after centrifugation is returned to be added in step (2) and be mixed with broken sweet potato raw material, according to broken rear sweet potato
Raw material: the mixing of supernatant=1:2 mass ratio continues be sieved obtained coarse filtration liquid and sweet potato dregs after mixing；
(4) pure water of the quality such as the sweet potato dregs addition obtained in step (2) is mixed to get mixed liquor, and α-high temperature is added
Amylase, α-alpha-amylase additional amount account for 1 ‰ or so of mixed liquor quality；90 DEG C of left sides are heated to using tube heater
The right side, High-temperature Liquefaction digest 1.2h, are cooled to 55 DEG C or so after the completion of enzymatic hydrolysis, after carrying out pressure extracting juice using type juice extractor, obtain
The turbid juice I of sweet potato after to liquefaction；
(5) citric acid is added in the turbid juice I of sweet potato of step (4), stirs evenly, fruit then is added in the turbid juice I of sweet potato
Glue lyases and glucoamylase, enzymatic hydrolysis 30min or so；It is separately added into papain and bromelain secondary enzymolysis again
10min or so, the turbid juice II of sweet potato after obtaining secondary enzymolysis；
Wherein: citric acid accounts for 0.6 ‰ or so of the turbid juice total weight of sweet potato；
Pectin lyase accounts for 0.2 ‰ or so of turbid I total weight of juice of sweet potato；
Glucoamylase accounts for 0.3 ‰ or so of turbid I total weight of juice of sweet potato；
Papain accounts for 0.2 ‰ or so of turbid I total weight of juice of sweet potato；
Bromelain accounts for 0.3 ‰ or so of turbid I total weight of juice of sweet potato；
(6) the turbid juice II of sweet potato after secondary enzymolysis in step (5) being subjected to ceramic membrane ultrafitration, ceramic membrane aperture is 100nm,
Obtain sweet potato juice；
(7) the sweet potato juice in step (6) being pumped into single effect evaporator and is concentrated, thickening temperature is 70 DEG C or so,
Vacuum degree is -0.1MPa, and concentration obtains sweet potato and juice is concentrated, and it is about 66 ° of Brix which, which is concentrated juice, sterilizes, obtains through 95 DEG C
It obtains sweet potato and clear juice products is concentrated.
Embodiment 3
It comprehensively utilizes sweet potato multistage coproduction starch and the technique of juice is concentrated, include the following steps:
(1) sweet potato raw material is subjected to two-stage cleaning and draining, hammer crushing to 40 mesh obtains broken sweet potato raw material；
(2) water is added in broken sweet potato raw material in step (1), broken sweet potato raw material and water quality ratio are 1:
After 2, stir about 10min, it is filtered by 60 mesh vibrating screen panels, respectively obtains coarse filtration liquid and sweet potato dregs；
(3) coarse filtration liquid is separated using disk plate centrifuge, centrifuge video disc rotating speed is 5500r/min or so, through from
Supernatant and sweet potato wet starch are obtained after heart separation, dries sweet potato wet starch, drying temperature is 120 DEG C, and drying time 5h is obtained
Sweet potato dried starch is obtained, dehydrated sweet potato starch water content is 10% or so；
The supernatant obtained after centrifugation is returned to be added in step (2) and be mixed with broken sweet potato raw material, according to broken rear sweet potato
Raw material: the mixing of supernatant=1:2 mass ratio continues be sieved obtained coarse filtration liquid and sweet potato dregs after mixing；
(4) pure water of the quality such as the sweet potato dregs addition obtained in step (2) is mixed to get mixed liquor, and α-high temperature is added
Amylase, α-alpha-amylase additional amount account for 3 ‰ or so of mixed liquor quality；95 DEG C of left sides are heated to using tube heater
The right side, High-temperature Liquefaction digest 1h, are cooled to 50 DEG C or so after the completion of enzymatic hydrolysis, after carrying out pressure extracting juice using type juice extractor, obtain
The turbid juice I of sweet potato after liquefaction；
(5) citric acid is added in the turbid juice I of sweet potato of step (4), stirs evenly, fruit then is added in the turbid juice I of sweet potato
Glue lyases and glucoamylase, enzymatic hydrolysis 30min or so；It is separately added into papain and bromelain secondary enzymolysis again
10min or so, the turbid juice II of sweet potato after obtaining secondary enzymolysis；
Wherein: citric acid accounts for 0.55 ‰ or so of the turbid juice total weight of sweet potato；
Pectin lyase accounts for 0.25 ‰ or so of turbid I total weight of juice of sweet potato；
Glucoamylase accounts for 0.25 ‰ or so of turbid I total weight of juice of sweet potato；
Papain accounts for 0.25 ‰ or so of turbid I total weight of juice of sweet potato；
Bromelain accounts for 0.25 ‰ or so of turbid I total weight of juice of sweet potato；
(6) the turbid juice II of sweet potato after secondary enzymolysis in step (5) being subjected to ceramic membrane ultrafitration, ceramic membrane aperture is 100nm,
Obtain sweet potato juice；
(7) the sweet potato juice in step (6) is pumped into single effect evaporator and is concentrated, thickening temperature is 70 DEG C, vacuum
Degree is -0.1MPa, and concentration obtains sweet potato and juice is concentrated, and it is 66.5 ° of Brix which, which is concentrated juice, is sterilized through 92 DEG C, is obtained sweet
Clear juice products are concentrated in potato.
Embodiment 4
The product of acquisition in Examples 1 to 3 is detected, specific as follows:
This experimental raw is tested using the white sweet potato in the Sishui Shandong place of production, and content of starch 25.1% passes through implementation
The technique of example 1~3 produces product obtained, and the flour extraction of sweet potato raw starch is 18.4%, technique average starch flour extraction
For 15.3% average starch whiteness 84.59；
The measurement of content of starch: sour water solution titration
After starch is converted to glucose with sour water solution, its glucose content is measured according to the amount of glucose and is converted into starch
Content, the residue 0.5g after taking alcohol extraction are put into triangular flask, and 2%HCl 25mL is added, covers, boils in boiling water bath
3.5h is neutralized with 5mol/LNaOH, detergent is added further in accordance with the method for measurement reduced sugar, filtering is diluted to 250mL. absorption
5mL measures content of reducing sugar.
The measurement of raw starch flour extraction:
It selects potato wedge color and the normal sweet potato of hardness, cleans, dry, weigh, i.e. the total fresh weight (m of sampleAlways).It is cut into block
Shape is sufficiently homogenized, and with filtered through gauze into container, is washed 2 times, merging filtrate, is precipitated 10h, is removed supernatant after precipitating, obtain
Crude starch dries Crude starch for 24 hours at 80 DEG C, and weigh to obtain Crude starch dry weight (mCrude starch)。
XFlour extraction/ %=(mCrude starch/mAlways)×100
The measurement of technique starch flour extraction:
It selects potato wedge color and the normal sweet potato of hardness, cleans, dry, weigh, i.e. the total fresh weight (m of sampleAlways).Using implementation
Example description technique, obtains Crude starch, weigh to obtain Crude starch dry weight (mTechnique Crude starch)。
XTechnique flour extraction/ %=(mTechnique Crude starch/mAlways)×100
Starch: measuring brightness instrument measurement；
Starch product index table in 1 embodiment 1-3 of table
| Starch flour extraction | Whiteness | Technique starch flour extraction | |
| Common process | 18.4% | 80.6 | 18.3% |
| Embodiment 1 | 18.5% | 84.84 | 15.0% |
| Embodiment 2 | 18.6% | 84.32 | 15.8% |
| Embodiment 3 | 18.1% | 84.61 | 15.1% |
Determination of polysaccharide result in juice production process is concentrated in 2 sweet potato of table
It can be seen that by means of the present invention from the data in above table to sweet potato comprehensive processing and utilization multi-cascade
It produces, juice is concentrated in sweet potato obtained, and it is 4 times of polyoses content in sweet potato raw material or so that polyoses content therein is higher, this is
Because using the technique of two steps enzymatic hydrolysis in technique of the invention, the amylase of addition makes Starch Hydrolysis at maltose and grape
Sugar, as starch gradually decreases, polyoses content is gradually increased, and juice polyoses content highest is concentrated, compares and is processed into turbid juice
Still there is more polysaccharide loss during juice, main cause is that ultrafiltration has retained macromolecular polysaccharide and dextrin.This technique
It, can be by remaining Starch Conversion at grape mainly due to subsequent enzymolysis process without to the abundant starch extracted in raw material
Sugar, maltose and other polysaccharide, to be conducive to improve the soluble solid and nutritive value of sweet potato concentration juice.
In the present invention in addition to carrying out amylorrhexis, it is also added into pectin lyase, papain and bromelain, is used
The substances such as part aqueous pectin, albumen in hydrolysis juice, thus after solving sweet potato concentration juice shelf life appearance
Muddy problem.
Comparative example 1
(5) pectin lyase and glucoamylase are added in the turbid juice I of sweet potato of step (4), enzymatic hydrolysis 30min is left
It is right；It is separately added into papain secondary enzymolysis 10min or so again, the turbid juice II of sweet potato after obtaining secondary enzymolysis；
Wherein:
Pectin lyase accounts for 0.2 ‰ or so of turbid I total weight of juice of sweet potato；
Glucoamylase accounts for 0.3 ‰ or so of turbid I total weight of juice of sweet potato；
Papain accounts for 0.4 ‰ or so of turbid I total weight of juice of sweet potato.
Bromelain accounts for 0.4 ‰ or so of turbid I total weight of juice of sweet potato.
Remaining step is the same as embodiment 1.
Comparative example 2
(5) citric acid is added in the turbid juice I of sweet potato of step (4), stirs evenly, fruit then is added in the turbid juice I of sweet potato
Glue lyases and glucoamylase, enzymatic hydrolysis 30min or so；It is separately added into bromelain secondary enzymolysis 10min or so again, obtains
The turbid juice II of sweet potato after obtaining secondary enzymolysis；
Wherein: citric acid accounts for 0.6 ‰ or so of the turbid juice total weight of sweet potato；
Pectin lyase accounts for 0.1 ‰ or so of turbid I total weight of juice of sweet potato；
Glucoamylase accounts for 0.1 ‰ or so of turbid I total weight of juice of sweet potato；
Papain accounts for 0.4 ‰ or so of turbid I total weight of juice of sweet potato.
Bromelain accounts for 0.4 ‰ or so of turbid I total weight of juice of sweet potato.
Remaining step is the same as embodiment 1.
Comparative example 3
(5) citric acid is added in the turbid juice I of sweet potato of step (4), stirs evenly, fruit then is added in the turbid juice I of sweet potato
Glue lyases and glucoamylase, enzymatic hydrolysis 30min or so；It is separately added into papain secondary enzymolysis 10min or so again, obtains
The turbid juice II of sweet potato after obtaining secondary enzymolysis；
Wherein: citric acid accounts for 0.6 ‰ or so of the turbid juice total weight of sweet potato；
Pectin lyase accounts for 0.4 ‰ or so of turbid I total weight of juice of sweet potato；
Glucoamylase accounts for the 0.4 ‰ of turbid I total weight of juice of sweet potato；
Papain accounts for 0.2 ‰ or so of turbid I total weight of juice of sweet potato；
Remaining step is the same as embodiment 1.
Comparative example 4
(5) citric acid is added in the turbid juice I of sweet potato of step (4), stirs evenly, fruit then is added in the turbid juice I of sweet potato
Glue lyases and glucoamylase digest 30min；It is separately added into bromelain secondary enzymolysis 10min again, obtains secondary enzyme
The turbid juice II of sweet potato after solution；
Wherein: citric acid accounts for the 0.5 ‰ of the turbid juice total weight of sweet potato；
Pectin lyase accounts for 0.4 ‰ or so of turbid I total weight of juice of sweet potato；
Glucoamylase accounts for the 0.4 ‰ of turbid I total weight of juice of sweet potato；
Bromelain accounts for the 0.2 ‰ of turbid I total weight of juice of sweet potato.
Remaining step is the same as embodiment 1.
Comparative example 5
(5) citric acid is added in the turbid juice I of sweet potato of step (4), stirs evenly, fruit then is added in the turbid juice I of sweet potato
Glue lyases, enzymatic hydrolysis 30min or so；It is separately added into bromelain secondary enzymolysis 10min or so again, after obtaining secondary enzymolysis
The turbid juice II of sweet potato；
Wherein: citric acid accounts for 0.6 ‰ or so of the turbid juice total weight of sweet potato；
Pectin lyase accounts for 0.4 ‰ or so of turbid I total weight of juice of sweet potato；
Papain accounts for 0.2 ‰ or so of turbid I total weight of juice of sweet potato；
Bromelain accounts for 0.4 ‰ or so of turbid I total weight of juice of sweet potato.
Remaining step is the same as embodiment 1.
Comparative example 6
(5) citric acid is added in the turbid juice I of sweet potato of step (4), stirs evenly, Portugal then is added in the turbid juice I of sweet potato
Grape saccharogenic amylase, enzymatic hydrolysis 30min or so；It is separately added into bromelain secondary enzymolysis 10min or so again, after obtaining secondary enzymolysis
The turbid juice II of sweet potato；
Wherein: citric acid accounts for 0.6 ‰ or so of the turbid juice total weight of sweet potato；
Glucoamylase accounts for 0.3 ‰ or so of turbid I total weight of juice of sweet potato；
Papain accounts for 0.2 ‰ or so of turbid I total weight of juice of sweet potato；
Bromelain accounts for 0.4 ‰ or so of turbid I total weight of juice of sweet potato.
Remaining step is the same as embodiment 1.
The polyoses content and turbidity contrast table of sweet potato juice in 4 embodiment 1 of table and each comparative example
Each index is pair after being diluted with water to 12 ° of Brix after sweet potato concentration clear juice products are placed 30 days in contrast table
Than as a result, blank sample by without after any enzymolysis processing concentration juice sample dilute.
Determination of light transmittance: T value of the spectrophotometer at 650nm；
Turbidimetric analysis turbidimetry: nephelometer measurement.
The indexs such as product light transmittance compare in 3 embodiment 1 and comparative example 1-6 of table
It can be seen that blank group from above comparison to digest without any enzyme, be obtained after taking juice that sterilization is concentrated by ultrafiltration sweet
Juice is concentrated in potato；Each embodiment and comparative example is compared, blank group light passing rate is minimum, and turbidity highest goes out with a large amount of muddinesses
It is existing, illustrate that enzymolysis process not only contributes to improve the soluble solid and polyoses content of sweet potato juice, also helps the steady of product
It is qualitative；
In comparative example 1, citric acid is not added, though by enzymatic hydrolysis, the turbidity and light transmittance of sweet potato juice have decline, say
Bright appropriateness adjusts acid to be conducive to hydrolysis result, and sweet potato juice is partial neutral juice, and appropriate pH also helps the control of microorganism,
Facilitate preservation；
Pectase and glucoamylase addition dosage reduce in comparative example 2, and turbidity and light transmission also have decline；Comparative example
3~6 reduce bromelain, papain, glucoamylase and pectin lyase respectively, the turbidity of sweet potato juice and thoroughly
Light also has different degrees of decline.
The condition of this explanation, type, dosage and enzymatic hydrolysis for enzyme in enzymatic hydrolysis will affect if adjusting or deleting
To the quality of later period product obtained.
Enzyme about property of the same race is replaced, and the present inventor also did following experiment:
Comparative example 7
Papain is replaced with to the acid protease of homogenous quantities, remaining is same as Example 1；
Comparative example 8
Bromelain is replaced with to the acid protease of homogenous quantities, remaining is same as Example 1；
Comparative example 9
Papain is replaced with to the neutral proteinase of homogenous quantities, remaining is same as Example 1；
The indexs such as product light transmittance compare in 4 embodiment 1 and comparative example 7-9 of table
| Light transmittance % | Turbidity (NTU) | Clarification degree | Polyoses content (mg/100g) | |
| Embodiment 1 | 95.6 | 3.4 | Without turbid phenomenon | 15.3 |
| Comparative example 7 | 83.2 | 46.9 | There is gluey muddy generation | 13.8 |
| Comparative example 8 | 83.5 | 52.6 | There is gluey muddy generation | 14.2 |
| Comparative example 9 | 82.1 | 39.8 | There is the generation of granular muddiness | 14.8 |
It can be seen that from the data in above table and one of enzyme in the present invention replaced with into other equivalent weights
Enzyme, clarification degree can also change.This illustrates that the selection of the enzyme in the present invention is not any addition, but of the invention
It is obtained that people has paid creative work.
Embodiment 5
From the cost analysis of wastewater treatment, non-wastewater discharge in technique in the present invention and is set only a small amount of raw material ejected wash water
Standby flushing water needs to handle, and greatly reduces the cost of sewage disposal of production；
And in traditional handicraft, every one ton of waste water its cost of processing is 7-10 member；
5 present invention of table is compared with traditional handicraft cost for wastewater treatment
| Cost for wastewater treatment (member) | |
| The present invention | 0 |
| Traditional handicraft | 7~10 |
In terms of emission reduction, technique of the invention will be far superior to traditional handicraft.
Therefore, either in terms of the quality preservation of product, or in terms of emission reduction and save the cost, technique of the invention
It is far superior to traditional processing technology.
Claims (10)
1. comprehensively utilizing sweet potato multistage coproduction starch and the technique of juice being concentrated, include the steps that following:
(1) sweet potato raw material is subjected to two-stage cleaning and draining, is crushed, obtains broken sweet potato raw material；
(2) water is added in broken sweet potato raw material in step (1), stirs, filtering obtains coarse filtration liquid and sweet potato dregs；
(3) coarse filtration liquid in step (2) is centrifugated, obtains supernatant and sweet potato wet starch, dry sweet potato wet starch obtains
Sweet potato dried starch；The supernatant that centrifugation obtains is returned to be added in step (2) and be mixed with broken sweet potato raw material, mistake after stirring and evenly mixing
It sieves and coarse filtration liquid and sweet potato dregs is made；
(4) pure water is added in the sweet potato dregs obtained in step (2) and is mixed to get mixed liquor, and α-alpha-amylase is added,
Heating, High-temperature Liquefaction enzymatic hydrolysis, enzymatic hydrolysis cool down after the completion, and juicing obtains the turbid juice I of sweet potato；
(5) acid is added in the turbid juice I of sweet potato after step (4) liquefaction, stirs evenly, pectin lyase and glucose is then added
Amylase enzymolysis, then it is separately added into papain and bromelain, secondary enzymolysis obtains the turbid juice II of sweet potato；
(6) by turbid II ultrafiltration of juice of sweet potato after secondary enzymolysis in step (5), sweet potato juice is obtained；
(7) the sweet potato juice in step (6) is concentrated under vacuum, obtains sweet potato and juice is concentrated, it is clear obtains sweet potato concentration for sterilizing
Juice product.
2. comprehensive utilization sweet potato multistage coproduction starch and the technique that juice is concentrated as described in claim 1, it is characterised in that:
(1) sweet potato raw material is subjected to two-stage cleaning and draining, using hammer crusher machine to 20~40 mesh, it is former obtains broken sweet potato
Material.
3. comprehensive utilization sweet potato multistage coproduction starch and the technique that juice is concentrated as described in claim 1, it is characterised in that:
(2) water mixing is added in broken sweet potato raw material in step (1), broken sweet potato raw material and water quality ratio are 1:
2, after stirring 5~10min, is filtered using 60 mesh vibrating screen panels, obtain coarse filtration liquid and sweet potato dregs.
4. comprehensive utilization sweet potato multistage coproduction starch and the technique that juice is concentrated as described in claim 1, it is characterised in that:
(3) coarse filtration liquid in (2) being centrifugated using disk plate centrifuge, centrifuge video disc rotating speed is 5000~7500r/min,
Supernatant and sweet potato wet starch are obtained, sweet potato wet starch is dried, drying temperature is 110~130 DEG C, and drying time is 4~6h, is obtained
Sweet potato dried starch is obtained, dehydrated sweet potato starch water content is 8~15%；
The supernatant obtained after centrifugation is returned in step (2) and is mixed with broken sweet potato raw material, according to broken rear sweet potato raw material: on
The mixing of clear liquid=1:1.5~3 mass ratio, is sieved after stirring and evenly mixing and coarse filtration liquid and sweet potato dregs is made.
5. comprehensive utilization sweet potato multistage coproduction starch and the technique that juice is concentrated as described in claim 1, it is characterised in that:
(4) pure water of the quality such as addition is mixed to get mixed liquor in the sweet potato dregs obtained in step (2), and α-high temperature is added
Amylase, α-alpha-amylase additional amount account for 1 ~ the 3 ‰ of mixed liquor quality；90 ~ 97 DEG C are heated to using tube heater,
High-temperature Liquefaction digests 0.8 ~ 1.2h, is cooled to 45 ~ 55 DEG C after the completion of enzymatic hydrolysis, after carrying out pressure extracting juice using type juice extractor, obtains
The turbid juice I of sweet potato after to liquefaction.
6. comprehensive utilization sweet potato multistage coproduction starch and the technique that juice is concentrated as described in claim 1, it is characterised in that:
(5) citric acid is added in the turbid juice I of sweet potato of step (4), stirs evenly, pectin is then added in the turbid juice I of sweet potato and splits
Enzyme and glucoamylase are solved, 25~35min is digested；Be separately added into again papain and bromelain secondary enzymolysis 8~
15min, the turbid juice II of sweet potato after obtaining secondary enzymolysis；
Wherein: citric acid accounts for 0.5~the 0.6 ‰ of the turbid juice total weight of sweet potato；
Pectin lyase accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
Glucoamylase accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
Papain accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
Bromelain accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato.
7. comprehensive utilization sweet potato multistage coproduction starch and the technique that juice is concentrated as described in claim 1, it is characterised in that:
(6) the turbid juice II of sweet potato after secondary enzymolysis in step (5) is subjected to ceramic membrane ultrafitration, ceramic membrane aperture is 100nm, is obtained
Sweet potato juice.
8. comprehensive utilization sweet potato multistage coproduction starch and the technique that juice is concentrated as described in claim 1, it is characterised in that:
(7) the sweet potato juice in step (6) is pumped into single effect evaporator and is concentrated, thickening temperature is 65~75 DEG C, vacuum
Degree is -0.1MPa, and the sweet potato that concentration obtains 65~70 ° of Brix is concentrated juice, sterilizes through 92~95 DEG C, obtains sweet potato and juice is concentrated
Product.
9. the technique of comprehensive utilization sweet potato multistage coproduction starch and concentration juice as described in claim 1, including step below
It is rapid:
(1) sweet potato raw material is subjected to two-stage cleaning and draining, hammer crushing to 20~40 mesh obtains broken sweet potato raw material；
(2) water is added in broken sweet potato raw material in step (1), broken sweet potato raw material and water quality ratio are 1:2, are stirred
After mixing 5~10min, it is filtered by 60 mesh vibrating screen panels, respectively obtains coarse filtration liquid and sweet potato dregs；
(3) coarse filtration liquid in (2) being separated using disk plate centrifuge, centrifuge video disc rotating speed is 5000~7500r/min,
Supernatant and sweet potato wet starch are obtained after being centrifuged, dries sweet potato wet starch, and drying temperature is 120 DEG C, and drying time is
5h, obtains sweet potato dried starch, and dehydrated sweet potato starch water content is 10%；
The supernatant obtained after centrifugation is returned to be added in step (2) and be mixed with broken sweet potato raw material, according to broken rear sweet potato raw material:
The mixing of supernatant=1:2 mass ratio, continues be sieved obtained coarse filtration liquid and sweet potato dregs after mixing；
(4) pure water of the quality such as the sweet potato dregs addition obtained in step (2) is mixed to get mixed liquor, and α-high-temperature starch is added
Enzyme, α-alpha-amylase additional amount account for 1 ~ the 3 ‰ of mixed liquor quality；95 DEG C are heated to using tube heater, high-temperature liquid
Change enzymatic hydrolysis 1h, is cooled to 50 DEG C after the completion of enzymatic hydrolysis, after carrying out pressure extracting juice using type juice extractor, the sweet potato after being liquefied is turbid
Juice I；
(5) citric acid is added in the turbid juice I of sweet potato of step (4), stirs evenly, pectin is then added in the turbid juice I of sweet potato and splits
Enzyme and glucoamylase are solved, 30min is digested；It is separately added into papain and bromelain secondary enzymolysis 10min again, obtains
The turbid juice II of sweet potato after obtaining secondary enzymolysis；
Wherein: citric acid accounts for 0.5~the 0.6 ‰ of the turbid juice total weight of sweet potato；
Pectin lyase accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
Glucoamylase accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
Papain accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
Bromelain accounts for 0.2~the 0.3 ‰ of turbid I total weight of juice of sweet potato；
(6) the turbid juice II of sweet potato after secondary enzymolysis in step (5) is subjected to ceramic membrane ultrafitration, ceramic membrane aperture is 100nm, is obtained
Obtain sweet potato juice；
(7) the sweet potato juice in step (6) is pumped into single effect evaporator and is concentrated, thickening temperature is 65~75 DEG C, vacuum
Degree is -0.1MPa, and concentration obtains sweet potato and juice is concentrated, and sterilizes through 92~95 DEG C, obtains sweet potato and clear juice products are concentrated.
10. comprehensive utilization sweet potato multistage coproduction starch and the technique that juice is concentrated as claimed in claim 9, which is characterized in that
(7) in, it is 65~70 ° of Brix that concentration, which obtains sweet potato concentration juice,.
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Application publication date: 20190402 |