CN102352395A

CN102352395A - Technology for processing starch by using fresh sweet potatoes

Info

Publication number: CN102352395A
Application number: CN201110228819XA
Authority: CN
Inventors: 刘瀚昌
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-05
Filing date: 2011-08-05
Publication date: 2012-02-15

Abstract

The invention relates to the field of food processing and in particular relates to specific measures for all links from selection of sweet potato raw materials to water-washing, blending to form pulp and raising flour. The processed starch from fresh sweet potatoes is mostly applied to manual production in rural areas, but the traditional processing method does not pay attention to the grasp of all the links, so that the yield of the starch is low and the quality is common. The technology comprises the following steps: firstly selecting the sweet potatoes with high starch content, cleaning, smashing and then grinding into potato paste, wherein, during the process of blending for forming the pulp, the best pH value of acid pulp is 3.6-4.0, and the concentration of starch milk in a large cylinder is 3.5-4.0 Baume degrees; and adding the acid pulp in the amount which is 2% of the starch milk, standing for 20-30 minutes, skimming the upper layer of clear swill, proteins, fiber and a small amount of the starch, adding water into the bottom layer of the starch for mixing, blending to form the starch milk for enabling the starch to precipitate again, further skimming the upper layer of the acid pump, transferring the starch which is screened out into a small cylinder, adding the water for rinsing the starch, raising the flour and air-drying to get the starch.

Description

A kind of scarlet potato starch producing technology

Technical field

The present invention relates to food processing field, specifically from sweet potato material choose washing, convert slurry, the concrete measure of each link of powder.

Background technology

Scarlet potato starch producing is applied to the rural area manual production more, but traditional processing method is not paid attention to the assurance of each link, causes starch yield low, and is fair.

Summary of the invention

1, material choice: choose the kind of starch producing, require starch content high, generally select skin red, inside is white Ipomoea batatas, and Ipomoea batatas in spite of illness is not suitable for doing starch and processes raw material, and is prone to rot to cause damage, and therefore will reject sick potato clean.

2, washing: bright potato poured into add supernatant water in the cylinder, turn over manual work and wash, wash the back and take out, drop removes Yu Shui.

3, fragmentation: the bright potato behind the draining breaks into fragment with crusher, and the size of piece is below 2 centimetres, is beneficial to into mill.

4, grind filtration: bright potato fragment is sent into stone mill or Buddha's warrior attendant sand milling add water mill and become potato to stick with paste, the ratio of bright potato weight and amount of water is 1: 3～3.5.Potato being stuck with paste the impouring aperture is to filter in the 60 purpose sieves again.

5, convert slurry: the starch milk through filtering is put into vat, adds the acidity and the concentration of wintercherry and water adjustment starch milk immediately in proportion.According to knowhow, the wintercherry optimal ph is 3.6～4.0.Starch concentration is 3.5～4.0 degree Beaume in the vat, and adding the wintercherry amount is 2% of starch milk, adds that the pH value of starch milk is 5.6 after the wintercherry.If temperature is high, fermentation is fast, and the wintercherry consumption can reduce as one feels fit.

6, cast aside cylinder and seat cylinder: left standstill approximately 20～30 minutes after converting slurry, deposition is accomplished, can cast aside cylinder.The mixed solution of the clear swill in upper strata and protein, fiber and amount of starch is taken out, stay the starch that is of bottom.Add water in the bottom starch after casting aside cylinder and mix, the furnishing starch milk makes the starch redeposition.Answer controlled temperature and time when sitting cylinder, sitting the cylinder temperature is 20 deg.c, and the time was generally 24 hours.Sit the cylinder fermentation and must send out thoroughly, suitably stir during the fermentation, impel fermentation to accomplish.

7, casting aside slurry filters: sit wintercherry that cylinder generated and be called two and slurry, the normal wintercherry of fermenting has fragrant, and paste colors is pure white like milk.Casting aside slurry promptly is that the upper strata wintercherry is cast aside out as the usefulness of converting slurry.Casting aside starch behind the slurry, to use sieve aperture be that 120 dusting cover sieves, and screen overflow is thin slag, and screen underflow is a starch, changes little cylinder over to, adds water rinse starch, need place approximately 24 hours, prevents the fermentation phenomenon.

8, play powder: starch is post precipitation in little cylinder, and supernatant liquid is little slurry, spread little slurry after, leave the greyish white oil-bound distemper of one deck on the starch surface, the oil-bound distemper used water is flush away from starch surface, bottom starch takes out with scoop.

9, drying:, obtain wet starch through above-mentioned flow process.Must carry out drying for the ease of storage and transportation.The general daylight that adopts dries or sends into the drying room oven dry.

Technique effect

Through adopting above-mentioned flow process, starch yield increases about 10%, and quality is greatly improved.

Specific embodiment

Derived food in Beijing factory obtains good result through following work:

1, Ipomoea batatas is put into cylinder successively and clean, after cleaning up, break into fragment with crusher, the size of piece is below 2 centimetres.

2, bright potato fragment is sent into stone mill or add water mill and become potato to stick with paste, the ratio of bright potato weight and amount of water is 1: 3～3.5.

3, put into vat through the starch milk that filters, add the acidity and the concentration of wintercherry and water adjustment starch milk immediately in proportion.

4, left standstill approximately 20～30 minutes after converting slurry, the mixed solution of the clear swill in upper strata and protein, fiber and amount of starch is taken out, stay the starch that is of bottom.

5, to use sieve aperture be that 120 dusting cover sieves to the starch after the upper strata wintercherry is cast aside out, changes little cylinder behind the sieve over to, adds water rinse starch.

6, skim little slurry and oil-bound distemper, obtain wet starch, dry then.

Claims

1. grind filtration: bright potato fragment is sent into stone mill or Buddha's warrior attendant sand milling add water mill and become potato to stick with paste, the ratio of bright potato weight and amount of water is 1: 3～3.5.Potato being stuck with paste the impouring aperture is to filter in the 60 purpose sieves again.

2. convert slurry: the starch milk through filtering is put into vat, adds the acidity and the concentration of wintercherry and water adjustment starch milk immediately in proportion.According to knowhow, the wintercherry optimal ph is 3.6～4.0.Starch concentration is 3.5～4.0 degree Beaume in the vat, and adding the wintercherry amount is 2% of starch milk, adds that the pH value of starch milk is 5.6 after the wintercherry.If temperature is high, fermentation is fast, and the wintercherry consumption can reduce as one feels fit.

3. cast aside cylinder and sit cylinder: left standstill approximately 20～30 minutes after converting slurry, deposition is accomplished, can cast aside cylinder.The mixed solution of the clear swill in upper strata and protein, fiber and amount of starch is taken out, stay the starch that is of bottom.Add water in the bottom starch after casting aside cylinder and mix, the furnishing starch milk makes the starch redeposition.Answer controlled temperature and time when sitting cylinder, sitting the cylinder temperature is 20 deg.c, and the time was generally 24 hours.Sit the cylinder fermentation and must send out thoroughly, suitably stir during the fermentation, impel fermentation to accomplish.