CN101773265A

CN101773265A - Method for preparing date juice by date powder enzymolysis leaching

Info

Publication number: CN101773265A
Application number: CN201010033320A
Authority: CN
Inventors: 刘孟军; 张树航; 赵智慧
Original assignee: NATIONAL NORTHERN MOUNTAIN AREA AGRICULTURAL ENGINEERING AND TECHNICAL CENTER; Hebei Agricultural University
Current assignee: NATIONAL NORTHERN MOUNTAIN AREA AGRICULTURAL ENGINEERING AND TECHNICAL CENTER; Hebei Agricultural University
Priority date: 2010-01-07
Filing date: 2010-01-07
Publication date: 2010-07-14

Abstract

The invention discloses a method for preparing date juice by date powder enzymolysis leaching, which comprises the following steps of: (A) cleaning up red dates and then slicing, baking and crushing to prepare date powder; (B) adding water which is 15 times the weight of the data powder to the data powder, and then adding pectinase which is 0.3 percent the weight of the data powder; regulating pH to 3.0 by citric acid; extracting for about 5 hours at the temperature of 50 to 60 DEG C and then cooling; filtering to obtain filtered liquid which is the natural date juice. The invention is characterized in that the data juice is prepared by taking the data powder as the raw material by adopting an enzymolysis leaching process, thereby reducing the leaching temperature and time, and the extracting efficiency of the data juice is high and the quality is high.

Description

A kind of method of utilizing the date powder enzymolysis lixiviate to produce jujube juice

Technical field

The present invention relates to a kind of method of utilizing the fruit lixiviate to produce fruit juice, relating to a kind of specifically is the method that jujube juice is produced in the enzymolysis lixiviate of raw material with the jujube powder.

Background technology

Jujube (Ziziphus jujuba Mill.), the Rhamnaceae jujube is one of the most ancient fruit tree of China, at least the cultivation history in existing more than 3000 year.Jujube is the characteristic advantage fruit tree that originates in China, about 1,500,000 hectares of existing cultivated area, more than 300 ten thousand tons of annual productions.Up to the present, have only China and Korea S that the scale commodity cultivation of jujube tree is arranged in the world, China's jujube output accounts for the world more than 99%.In recent years, under the situation that large fruit tree benefits such as apple, pears glide day by day, jujube tree is strong with its adaptability, cultivation is easy, fast rich, the advantage such as food therapy value is high, economy and ecological benefits are remarkable of early bearing, has become new focus in the national fruit tree development.But dehydration shrinkage, softening brown stain and fermentation very easily take place and go rotten in bright jujube, are difficult for fresh-keeping and long-distance transport.Therefore, the back processing processing of adopting of jujube fruit seems particularly important.

Fruit juice production is most widely used a kind of fruit processing mode.Fruit juice has the natural flavour mountaineous of fruit, contains multiplely to the useful vitamin of health, mineral matter, trace element and bioactivator etc., has good nutrition and health care function.Studies show that add the more traditional simple hot water extraction of an amount of pectase and produce jujube juice in leaching process, extraction time is short, and can improve the soluble solid content of jujube juice, improves the recovery rate of jujube juice.Jujube is made dried jujube powder earlier, carry out the enzymolysis lixiviate with dried jujube powder again and produce jujube juice, not only can solve jujube fruit long term storage problem, also can improve jujube juice extraction efficiency and product quality.

Summary of the invention

The purpose of this invention is to provide a kind of method of utilizing the date powder enzymolysis lixiviate to produce jujube juice, promptly is raw material with the red date, is ground into the jujube powder through oven dry, carries out the enzymolysis lixiviate then, obtains red date Normal juice after the filtration.

The method of utilizing the date powder enzymolysis lixiviate to produce jujube juice of the present invention may further comprise the steps:

(A) red date is weighed, clean up back section, oven dry, be ground into the jujube powder;

(B) add water in the jujube powder, (be solid-liquid ratio, w/v) be 1: 15 to the w/v of jujube powder and water, and the pectase addition is 0.3% of a jujube grain weight amount, is 3.0 with the lemon acid for adjusting pH, extracts back cooling in about 5 hours under 50～60 ℃, filters, and gets jujube Normal juice.

Wherein, in the step (B), brew temperatures is unsuitable too high, the too high reduced activity or the inactivation that may cause pectase of temperature.The pectase addition is 0.3% more suitable with jujube grain weight amount, and pH 3.0～4.0 is advisable the too high or too low enzymolysis lixiviate that is unsuitable for pectase.

The direct pectase with 0.3% of the present invention carries out lixiviate and extracts jujube juice under suitable temperature and pH, need not through extraction for a long time pectin is dissolved fully, makes jujube juice have higher soluble solid content.In minimizing time and temperature, reduced equipment investment and corresponding energy consumption, and avoided hot-spot in the leaching process to cause the caramelization of jujube juice, the mouthfeel of infringement jujube juice.

The invention is characterized in that with the jujube powder be raw material, adopt the enzymolysis extracting technology to produce jujube juice, can significantly reduce extraction temperature, reduce energy resource consumption, shorten the lixiviate cycle of jujube juice.Raw material sources of the present invention are abundant, and manufacturing process is simple, and production cost is low, and wherein major product jujube Normal juice can be made into date juice beverage, also can further make mixed type fruit juice, the huge market demand, and byproduct jujube slag also can be used as feed, fertilizer or fuel etc.

Description of drawings

Fig. 1 is of the present inventionProcess chart

The specific embodiment

Take by weighing golden jujube jujube powder 10g; In the jujube powder, add water 150mL, add pectase 0.03g, drip about lemon acid for adjusting pH value to 3.0; 50～60 ℃ of following boilings, in boiling process otherwise the time stirring; Cool off behind the 5h, filter, getting cleaner liquid is jujube Normal juice.Get jujube Normal juice 148g through weighing, soluble solid content is 5.7%, and recovery rate can reach 84%.

Claims

1. method of utilizing the date powder enzymolysis lixiviate to produce jujube juice may further comprise the steps:

(A) with after the cleaning up red dates, section, oven dry, pulverizing become the jujube powder;

(B) add water in the jujube powder, (being solid-liquid ratio, w/v) is 1: 15 to make the w/v of jujube powder and water, adding the pectase of jujube grain weight amount 0.3% then, is 3.0 with the lemon acid for adjusting pH, extracts back cooling in about 5 hours down at 50～60 ℃, filter, get cleaner liquid, be jujube Normal juice.

2. according to the described a kind of method of utilizing the date powder enzymolysis lixiviate to produce jujube juice of claim 1, it is characterized in that: extracting method obtains jujube Normal juice for the jujube powder passes through after removal jujube slag is extracted in the low temperature boiling.

3. according to the described a kind of method of utilizing the date powder enzymolysis lixiviate to produce jujube juice of claim 1, it is characterized in that: add pectase in the leaching process, can dissolve and be difficult for dissolved pectin in water.

4. according to the described a kind of method of utilizing the date powder enzymolysis lixiviate to produce jujube juice of claim 1, it is characterized in that: raw material is the jujube powder.