CN101558817A - Method for producing protein concentrate by high temperature peanut meal - Google Patents

Abstract

The invention discloses a method for producing protein concentrate by high temperature peanut meal; wherein, high temperature peanut meal obtained by production of peanut oil by hot pressing method is taken as the raw material; the peanut meal is sieved by a classifying screen, fine power is abandoned, enzymolysis is carried out the peanut meal on the screen by alpha-1, 4-glucose hydrolytic ferment enzymolysis; then the enzymolyzed peanut meal is put into a leacher to be leached by ethanol; in the peanut meal, alcohol soluble elements and water-soluble syrup are dissolved in liquid to form diluted syrup which flows out of the leacher; the leached wet meal passes through an extruding machine and enters a vacuum dealcoholization device where the ethanol in the meal is removed in the state of slightly negative pressure, moisture thereof is adjusted to 4-8%, thus obtaining the protein concentrate; the invention has the characteristics of no damage to nutritional value of peanut protein, no pollution to the environment, simple method, high yield of protein and low cost.

Description

A kind of method of producing protein concentrate by high temperature peanut meal

Technical field

The invention belongs to agricultural byproducts deep processing field, especially relate to the method that a kind of water alcohol method is handled producing protein concentrate by high temperature peanut meal.

Background technology

Peanut is important oil crops, industrial crops, has the rich albumen double properties of rich oil, is good edible oil, protein and polysaccharide, flavones isoreactivity material source; Majority state lacks the research to peanut grease and peanut protein product development because peanut resource scarcity and eating habit problem are only paid attention to the research and development to shelled peanut food, peanut butter product.1,500 ten thousand tons of China's year yield peanuts, wherein 65% is used to produce edible peanut oil, it is the mainstream technology of current peanut system oil that technology is pressed in hot pressing, peanut oil aromatic flavour by this technology production, nutritious, favored by the consumer, but its byproduct---high temperature peanut meal, promptly the value of remaining peanut dregs is lower behind the peanut hot moulding; In recent years, the U.S., Japan have carried out correlative study to the functional characteristic of peanut protein in the food processing, the basic theory aspect that isoelectric point precipitation extracts peanut protein and peanut protein modification, but these researchs all do not relate to the high temperature peanut grouts to be raw material, also not to carry out industrialization development.

China is peanut yield big country, and at 3,000,000 tons, the output value is only about 10,000,000,000 yuan in national high temperature peanut meal annual production.Studies show that peanut dregs contains 50% left and right sides quality plant albumen, gross protein quantity reaches more than 1,500,000 tons, enough supplies the fifty-five million resident proteinaceous nutrient demand of the whole year.Peanut protein nutritive value and soybean protein not only difference are little, and also have some benefits, as: peanut protein does not contain ANFs such as urease, trypsase inhibin, phytic acid.The main cause that the high temperature peanut meal value is lower is that wherein protein is through long-time high-temperature process and sex change is serious, edible quality descends, generally only can be used as feed or fertilizer sale at a low price, this present situation both had been unfavorable for the reasonable utilization of protein resource, also influenced the lifting of oil processing industry economic benefit.

At present; the basic research of China peanut protein deep process technology aspect has obtained remarkable progress; the most basic problem is still not form scientific and technological industrialization; both lack the research of the integrated and production standard of peanut protein deep process technology, target level of product quality system, also lacked the research of the required key equipment of large-scale production.According to investigations, at present China only has two, three families to utilize the cold pressing dregs of rice to produce the enterprise of peanut meal powder, and production scale is approximately produces 10000 tons per year, and the protein content of its product only about 50% is not a peanut protein product truly.And utilizing high temperature peanut meal to produce aspect the peanut protein product, the domestic blank that almost is in had not both had industrialization development demonstration enterprise, did not have production standard and product state quality standard yet.The annual nearly 3,000,000 tons of good protein food resources of China can not get fully rationally utilizing, and accelerate the peanut protein Products Development and have urgency.

Summary of the invention

The objective of the invention is to improve the deficiency of prior art and provide a kind of and adopt that high temperature peanut meal is that raw material extract to concentrate peanut protein, does not destroy the nutritive value of peanut protein, do not produce environmental pollution, method is simple, the method for protein yield height, producing protein concentrate by high temperature peanut meal that cost is low.

The object of the present invention is achieved like this, and a kind of method of producing protein concentrate by high temperature peanut meal is that the high temperature peanut meal that obtains with hot moulding method production peanut oil is a raw material, processes through following steps:

A, screening: high temperature peanut meal is delivered to 100 orders-200 order classifying screen after measuring, and it is discarded to isolate fine powder, obtains sieving peanut meal;

B, enzymolysis: will sieve peanut meal with α-1,4-glucose hydrolysis enzyme under 50 ℃-60 ℃ condition, enzymolysis 2-3 hour;

C, leaching: the high temperature peanut meal behind the enzymolysis is put into infuser and ethanol reverse movement leached 1 hour, ethanol and peanut meal input ratio are 0.3～1.0: 1.0, the fresh ethanol aqueous solution with 95% sprays 10-15min, use peanut meal then: ethanol is 1: the fresh ethanol aqueous solution of the 65%-70% of 3-5 sprays 10-15min, pure soluble components and water-soluble syrup are dissolved in the liquid in the peanut meal, form rare syrup and flow out infuser;

D, wet dregs of rice drying: the wet dregs of rice after the leaching enter vacuum dealcoholysis device by behind the extruder, remove the ethanol in the dregs of rice under micro-vacuum state, and adjust moisture to 4%-8%, obtain the finished product dregs of rice, are protein concentrate.

Enzymolysis employed α-1,4-glucose hydrolysis enzyme addition is the 0.5%-1% of peanut meal weight.

The present invention is compared with the prior art according to following distinguishing feature and good effect are arranged: this technology utilizes high temperature peanut meal to extract protein concentrate in order to realize, and reach high product yield and product quality, protein concentrate processing at present mainly contains diluted acid extraction, aqueous alcohol extraction, though the protein concentrate of diluted acid extraction preparation has excellent function, but the yield of protein is low, only be 35%-42%, and the environmental pollution that the production process sewage discharge causes is comparatively serious, and comprehensive benefit is poor; The present invention washes based on enzymolysis alcohol, pulverize and obtain through screening, enzymolysis, leaching, wet dregs of rice drying, product, the fresh ethanol aqueous solution with 95% in the production process sprays, the molten ratio of materials is 1 then: the fresh ethanol aqueous solution of 65%-70% (3-5) sprays 10-15min, adopt adverse current, wash-out goes out the syrup class material in the raw material; The wet dregs of rice are through extruding, precipitation, the dry finished product that gets, and yield can reach 60%-65%, and protein content is 65%-72%, moisture 4%-8%.

The present invention has small investment, instant effect, yield height, energy savings, advantage free from environmental pollution, the peanut concentrated protein of producing can partly substitute the function of plant separation protein, the product major part can be done raw materials of food processing and add in various food, simultaneously can production feed grade protein concentrate, satisfy the demand of feedstuff industry to high-end raw material.

The specific embodiment

Below in conjunction with embodiment the present invention is described in further detail.

Embodiment, a kind of method of producing protein concentrate by high temperature peanut meal, be that the high temperature peanut meal that the hot moulding method is produced is delivered to classifying screen according to the capacity of infuser after measuring, metering gets final product with electronic weighing balance, and it is discarded to isolate fine powder, obtain sieving peanut meal, the classifying screen that uses is at 100 orders-200 order, and isolated fine powder is discarded, and the existence of fine powder can influence the area that leachate contacts with peanut meal, the permeability of solvent influences leaching effect; To sieve peanut meal and carry out enzymolysis, with α-1,4-glucose hydrolysis enzyme is under 50 ℃-60 ℃ condition, enzymolysis 2-3 hour, α-1,4-glucose hydrolysis enzyme addition is the 0.5%-1% of peanut meal weight, high temperature peanut meal behind the enzymolysis leaches with ethanolic solution in infuser, peanut meal and ethanol reverse movement leached 1 hour, ethanol and peanut meal input ratio are 0.3～1.0: 1.0, peanut meal goes out the preceding fresh ethanol aqueous solution with 95% of infuser and sprays 10-15min, use peanut meal then: ethanol is 1: the fresh ethanol aqueous solution of the 65%-70% of 3-5 sprays 10-15min, pure soluble components and water-soluble syrup are dissolved in the liquid in the peanut meal, form rare syrup and flow out infuser, entering safety can stores, the wet dregs of rice after the leaching enter extruder by burying scraper plate, by squeezing action cutting out partial liquid, the wet dregs of rice after the extruding enter vacuum dealcoholysis device, material is constantly stirred in the dealcoholysis device, thermally equivalent, under micro-vacuum state, remove the ethanol in the dregs of rice, little negative pressure is to vacuumize a little, be that grease leaches industrial routine techniques, and pneumatic conveying drying is adjusted moisture to 4%-8%, obtain the finished product dregs of rice, be protein concentrate, the finished product dregs of rice can be pulverized according to follow-up needs.

Claims (2)

1, a kind of method of producing protein concentrate by high temperature peanut meal is characterized in that the high temperature peanut meal that obtains with hot moulding method production peanut oil is a raw material, processes through following steps:

A, screening: high temperature peanut meal is delivered to 100 orders-200 order classifying screen after measuring, and it is discarded to isolate fine powder, obtains sieving peanut meal;

B, enzymolysis: will sieve peanut meal with α-1,4-glucose hydrolysis enzyme under 50 ℃-60 ℃ condition, enzymolysis 2-3 hour;

C, leaching: the high temperature peanut meal behind the enzymolysis is put into infuser and ethanol reverse movement leached 1 hour, ethanol and peanut meal input ratio are 0.3～1.0: 1.0, the fresh ethanol aqueous solution with 95% sprays 10-15min, use peanut meal then: ethanol is 1: the fresh ethanol aqueous solution of the 65%-70% of 3-5 sprays 10-15min, pure soluble components and water-soluble syrup are dissolved in the liquid in the peanut meal, form rare syrup and flow out infuser;

D, wet dregs of rice drying: the wet dregs of rice after the leaching enter vacuum dealcoholysis device by behind the extruder, remove the ethanol in the dregs of rice under micro-vacuum state, and adjust moisture to 4%-8%, obtain the finished product dregs of rice, are protein concentrate.

2, the method for a kind of producing protein concentrate by high temperature peanut meal according to claim 1, its feature enzymolysis employed α-1,4-glucose hydrolysis enzyme addition is the 0.5%-1% of peanut meal weight.