Method for preparing nutritional concentrated solution of red date

Abstract

The invention discloses a preparation method for a concentrated nutrient solution made from red dates, and relates to a production method which takes the red dates as raw materials to extract the essence of the red dates to obtain a clear juice concentrated solution. The preparation method aims at providing a refined and concentrated solution which has high nutrition, bright color, good flavor and is easy to be stored and has high efficiency in the process of extraction; the processing method is as follows: the first step, the red dates are cleaned and selected; the second step, the red datesare crushed and rehydrated; the third step, the red dates are beaten to obtain pulp; the fourth step, the pulp undergoes enzymolysis; the fifth step, the enzymolytic pulp is separated; the six step, the separated pulp is filtered; the seventh step, the filtered pulp is condensed; wherein the separation method is as follows: two-step horizontal-spiral separation is adopted, the enzymolytic pulp ispumped into a first horizontal-spiral centrifugal machine to separate the red date juice from the red date paste, and the separated juice is sent into a juice collecting tank; the red date paste is sent into a secondary dreg pot, and then purified water that is 2 to 5 times of the weight of the red date paste is added into the secondary dreg pot; after being stirred, the mixture is pumped into a second horizontal-spiral centrifugal machine to separate the red date juice from the red date paste, and the separated juice also enters into the juice collecting tank. The preparation method of the invention is applicable for industrialized mass production.

Description

technical field [0001] The preparation method of jujube nutrient concentrate of the present invention specifically relates to a production method of using jujube as a raw material and extracting its essence to prepare a clear juice type concentrate. Background technique [0002] Jujube is the ripe fruit of the jujube tree of the Rhammaceae (Rhanmacene), which originates in China. Traditional Chinese medicine believes that jujube (Ziziphus jujuba Mill.) has the function of "replenishing the middle and nourishing Qi, nourishing blood and calming the nerves". Modern pharmacological research shows that it has various pharmacological effects such as anti-allergic, sedative, liver-protecting, anti-inflammatory, and anti-aging . Jujube is a combination of nutrition, health care and medicine. It is known as the "king of fruits" and has a high reputation and recognition both at home and abroad. The Ministry of Health of my country listed jujube as the first batch of medicinal and e...

AI Technical Summary

Problems solved by technology

At the same time, due to the high processing temperature, the proper flavor of red dates is destroyed, and the finished product has a burnt smell.

[0011] 2. It is difficult to separate liquid and slag, and the separation effect is poor

At present, in the production of concentrated jujube juice, plate and frame filters and diatomite filters are generally used for the separation of liquid slag after leaching. Difficulty separating

Some manufacturers choose the method of decanter centrifugal separation + butterfly centrifugal separation + ultrafiltration, which solves the separation of liquid and slag better, but there is a large loss of juice during butterfly separation and slag discharge, and the filter membrane is easy to clog and difficult to filter during ultrafiltration. The phenomenon

[0012] 3. The concentrated juice is turbid, with poor flavor and color

Due to the long-term high temperature in the production process, the browning phenomenon of the concentrated juice is serious, and the color is black and dark; due to the poor separation effect of the liquid slag, more solid particles are mixed in the concentrated liquid, the concentrated liquid is turbid, and the concentration ratio is affected. When concentrated to 65 When it is more than %, there will be excessive viscosity, burnt smell, difficult operation, etc.

[0013] 4. More sewage discharge and low extraction rate

Due to the difficulty in separating the liquid slag during the process, a large amount of pomace is discharged with the juice, resulting in high BOD and COD values ​​in the sewage. At the same time, the extraction rate of jujube juice is low, and it also causes high energy consumption and high cost. high