CN102986913A - Preparation method for fresh-keeping tender bean curd - Google Patents

Abstract

The invention provides a preparation method for fresh-keeping tender bean curd. The fresh-keeping tender bean curd is produced via a conventional process step by using soybeans beans as a raw material; an agar liquid is added during a process of boiling soybean milk; and the soybean milk is solidified by marinating. The additive amount of a marinating solidification agent is 1-3% that of the soybean milk. The marinating solidification agent is composed of 0.1-0.5 part of ethyl hydroxybenzoate and 1 part of glucolactone. The fresh-keeping tender bean curd has the health-care characteristic of comprehensive nutrition, and can nourish yin and tonify yang, expel wind and remove heat, engender liquid and nourish stomach. By adding the agar and marinating with ethyl hydroxybenzoate and glucolactone, the quality of the fresh-keeping tender bean curd is greatly improved; and the fresh-keeping tender bean curd is tender, fine and smooth and has a quality guarantee period longer than 3 days at a normal temperature under an open and unsealed condition.

Description

Fresh-keeping soft bean curd preparation method

Technical field

The invention belongs to a kind of processed soybean food.

Background technology

The bean curd of prior art, traditional bean curd becomes with the bittern point with gypsum, and modern science man has invented than gypsum and the better product of bittern---glucolactone.The bean curd of pointing out with it is more delicate, and taste and nutritive value are also higher, and health is not definitely had harm, and the making lactone bean curd that everybody sees in the supermarket is put into it.The raw material of bean curd is soya bean, mung bean, white peas or beans, pea etc.It is clean first beans to be shelled, and puts into water after cleaning, and soaks appropriate time, adds a certain proportion of water mill again and becomes raw soya-bean milk.Then with special cloth bag the slurries that grind are installed, keep sack well, firmly extruding is with the soya-bean milk cloth bag of squeezing out.The general slurry that presses can press twice, after having pressed the first time sack is opened, and puts into clear water, keeps behind the sack again press for extracting juice well once.After raw soya-bean milk presses, put into pot and boil, will skim the foam that face is floating while boiling.The temperature of boiling remains between 90 to 110 degrees centigrade, and should be noted that the time of boiling.Well-done soya-bean milk need to carry out ordering halogen to solidify.The method of selecting halogen can be divided into two kinds in bittern and gypsum.The main component of bittern is magnesium chloride, and the main component of gypsum is calcium sulfate.Order the words of halogen with gypsum first will be with the gypsum roasting till just care, and then being crushed into powder adds water furnishing calcium plaster, pours just in the soya-bean milk of scooping out in the pot, and stir evenly gently with spoon.In the near future, soya-bean milk will condense into jellied bean curd.Also have in south directly to add the water mill slurry with gypsum, when order halogen the calcium plaster of milled is poured into the soya-bean milk stirring.Just GPRS is measured well, and being generally one jin of beans will be optimal proportion with 0.6 liang of gypsum.Need the older calcium plasters that then add of bean curd some more.If will further jellied bean curd be made bean curd, in then condense at jellied bean curd about 30 minutes, scoop in gently in the wooden block basin or other container of having completed infantees with spoon.After filling with, with infantees the jellied bean curd bag is risen, covers plank, pressed 10 to 20 minutes, soft beancurd.If dried bean curd processed then must scoop in jellied bean curd in the wooden block basin, wrap with cloth, cover plank.The upper stone of heap onboard, setting-out, bean curd.Color bean curd; This is nearest popular a kind of more nutritious, more healthy bean curd on the market.Color bean curd is the same with traditional bean curd, all is as raw material take soybean.Different is that it on the make adds crude vegetable fruit juice auxiliary material, forms natural colour, and contains abundant nutritional labeling, has preserved the cellulosic in the vegetables, is conducive to absorption of human body, digestion.Basic technology and the traditional bean curd of making color bean curd omit together, and critical process is the adding of dish juice.The color and luster of color bean curd depends primarily on the color and luster of vegetable juice.Can select celery, radish and celery tassel, capsicum leaf, sweet potato leaves etc. such as green bean curd processed; Make yellow bean curd, available carrot etc.; Make red bean curd, can squeeze the juice with tomato.The size of a standard bean curd should be the high 60mm of the wide 90mm of long 120mm.The bean curd of prior art: under the normal temperature, about 10-20 hours shelf-lifves, exist the deficiencies such as shelf-life weak point.Color bean curd; There is complex manufacturing technology, the deficiencies such as color fluctuation.

Summary of the invention:

The object of the invention is to, for the deficiencies in the prior art, propose a kind of fresh-keeping bean curd preparation method.

Fresh-keeping bean curd preparation method of the present invention, comprise that bean material soaks, water mill becomes raw soya-bean milk, filter and remove residue, mashing off, order the halogen coagulating agent, condense into jellied bean curd, setting-out, the technological process of bean curd; It is characterized in that: processing step is: raw material soybean soaking, water mill become raw soya-bean milk, filter and remove residue, mashing off, adding agar solution, the halogen of ordering solidify, condense into jellied bean curd, setting-out, bean curd; Described adding agar solution, agar solution are that concentration is the aqueous agar solution of 3-5% weight, and its addition is 1-3% of soybean milk quantity; The described halogen of ordering solidifies, and it orders the halogen coagulating agent, by weight percentage, is made of 0.1-0.5 part of nipagin A and 1 part of glucolactone; It orders halogen coagulating agent addition, and by weight percentage, the halogen coagulating agent addition of ordering is 1-3% of soybean milk quantity.

Soya bean; The nutritive value of soya bean is the abundantest, have the title of " kings in the beans ", is called " Vegetable meat ", " green cow " by people.Soyabean protein content is up to about 40%, and top quality reaching about 50% is the hat of other grains.Modern medicine study is thought, soya bean does not contain cholesterol, and can reduce body's cholesterol, reduce arteriosclerotic generation, prevention of cardiac also contains a kind of material that presses down pancreatin in the soya bean, it has certain curative effect to diabetes. therefore, soya bean is recommended as by the nutritionist and prevents and treats coronary heart disease, the ideal health care product of the diseases such as hypertension of atherosclerosis. and contained soft phosphatide is the pith that brain cell forms in the soya bean, and often eating soya bean has important usefulness to increasing and improving brain technical ability.Motherland's medical science is thought, takes soya bean and can make us the longue skin, and beneficial color, the replenishing essence marrow, reinforcement gas, the qi-restoratives appetizing is the help food that suitable valetudinarian, invalid uses, and has nourishing qi and blood. during invigorating the spleen is wide, the peaceful heart of body-building, lower sharp large intestine, the effect of moisturizing the water that disappears.

Glucolactone; Very widely food additives of a kind of purposes.Another name: 1,5-glucolactone; The maltonic acid delta-lactone; The D glucono-δ-lactone; Glucono-δ-lactone; Maltonic acid-delta-lactone; Glucurolactone; Artogicurol; Glucurone; D (+)-gluconic acid-Δ-lactone; D (+)-gluconic acid-Δ-lactone; Gluconolactone; D-grape acid lactone; Gluconic acid [Δ-] lactone; Grape acid Δ-lactone; Δ-glucolactone; D-(+)-glucolactone; The bean curd king.Traditional bean curd becomes with the bittern point with gypsum, has invented under the modern science than gypsum and the better product of bittern---gluconic acid lactone.The bean curd of pointing out with it is more delicate, and taste and nutritive value are also higher.

Nipagin A; [product purpose]: as food preservative, also be used for the industries such as pharmacy, leather; Fungistatic effect to fungi is stronger, but to the fungistatic effect of bacterium a little less than.As antibacterial anticorrisive agent, be widely used in liquid preparation and semisolid preparation, also can be used for the anticorrosion of food and cosmetics.[pharmacological action] this product is stronger to the fungistatic effect of fungi, but to the fungistatic effect of bacterium a little less than.As antibacterial anticorrisive agent, be widely used in liquid preparation and semisolid preparation, also can be used for the anticorrosion of food and cosmetics.

Agar; Be the agar made from the agar extract, be a kind of important natural plant gum, colourless, without solid shape, but belong to solid, dissolve in the hot water.Agar can be used to culture medium of making ice confectionery and microorganism etc.Agar is commonly called agar or agel-agal, also be agar-agar, agar contains abundant dietary fiber (content is 80.9%), protein content is high, heat is low, have toxin-expelling and face nourishing, purging intense heat, ease constipation, hypotensive, hypoglycemic and protective effect on cancer risk, united state food and agricultural organization confirms as the 21 century healthy food.Agar is by the polysaccharide body that extracts in the marine alga, is present purposes one of algin the most widely in the world.It has a wide range of applications aspect many at food industry, medical industry, daily-use chemical industry, bioengineering etc., and agar is used for the quality that food can obviously change food, improves the class of food.Price is very high.Its characteristics: have coagulability, stability, can form with some materials the physicochemical properties such as complex compound, can be used as thickener, coagulating agent, suspending agent, emulsifying agent, antistaling agent and stabilizing agent. be widely used in and make orange granule juice and various beverage, jelly, ice cream, cake, soft sweets, can, meat products, mixed congee, white fungus bird's nest, custard based food, stir-fried food etc. agar is at chemical industry, medical research can be made culture medium, ointment base and other purposes. and agar is that Gelidium (Gelidium) and the river Gracilaria with algae belongs to the gelatin product that (Gracilaria) makes, be the curing agent of the most frequently used microbiological culture media, also use what meat, fish, bird can and cosmetics, medicine and dental care.Brewage with wine industry in be used as fining agent, as thickener, and make the lubricant etc. of metal wire-drawing when making ice cream, cake and salad flavoring.

The present invention compared with prior art, its beneficial effect is: owing to add agar and adopt nipagin A, glucolactone orders halogen, quality greatly improves, soft exquisiteness, and normal temperature, unlimited blow-by lower shelf-life of situation reach the characteristics more than 3 days.

Concrete embodiment:

Embodiment

Fresh-keeping bean curd preparation method of the present invention, comprise that bean material soaks, water mill becomes raw soya-bean milk, filter and remove residue, mashing off, order the halogen coagulating agent, condense into jellied bean curd, setting-out, the technological process of bean curd; It is characterized in that: processing step is: raw material soybean soaking, water mill become raw soya-bean milk, filter and remove residue, mashing off, adding agar solution, the halogen of ordering solidify, condense into jellied bean curd, setting-out, bean curd; Described adding agar solution, agar solution are that concentration is the aqueous agar solution of 3-5% weight, and its addition is 1-3% of soybean milk quantity; The described halogen of ordering solidifies, and it orders the halogen coagulating agent, by weight percentage, is made of 0.1-0.5 part of nipagin A and 1 part of glucolactone; It orders halogen coagulating agent addition, and by weight percentage, the halogen coagulating agent addition of ordering is 1-3% of soybean milk quantity.

Above embodiment gained tofu product, soft exquisiteness, in normal temperature, the unlimited blow-by situation, the shelf-life reached more than 3 days.

Claims (1)

1. fresh-keeping soft bean curd preparation method, comprise that bean material soaks, water mill becomes raw soya-bean milk, filter and remove residue, mashing off, order the halogen coagulating agent, condense into jellied bean curd, setting-out, the technological process of bean curd; It is characterized in that: processing step is: raw material soybean soaking, water mill become raw soya-bean milk, filter and remove residue, mashing off, adding agar solution, the halogen of ordering solidify, condense into jellied bean curd, setting-out, bean curd; Described adding agar solution, agar solution are that concentration is the aqueous agar solution of 3-5% weight, and its addition is 1-3% of soybean milk quantity; The described halogen of ordering solidifies, and it orders the halogen coagulating agent, by weight percentage, is made of 0.1-0.5 part of nipagin A and 1 part of glucolactone; It orders halogen coagulating agent addition, and by weight percentage, the halogen coagulating agent addition of ordering is 1-3% of soybean milk quantity.