Method for extending storage period of embryo rice

A technology for germ rice and storage period, applied in the field of fresh-keeping of agricultural products, can solve the problems of high burst rate and poor storage performance of germ rice, and achieve the effects of small burst rate, maintaining appearance and cooking characteristics, and ensuring the quality of rice.

Inactive Publication Date: 2013-03-20
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems in the prior art that the germ rice is not well stored or the rate of bursting is high, the present invention provides a method that can prolong the storage period of germ rice

Method used

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  • Method for extending storage period of embryo rice

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Germ rice was placed on the conveyor belt at a conveying speed of 1 kg / s, preheated by hot air, treated with superheated steam, cooled by air step by step, and stored at room temperature (25±3°C, 65±3% RH). The specific heat treatment is as follows:

[0016] (1) Preheat the germ rice with hot air at 55°C, the air velocity is 3 m / s, the humidity is 30%, and the action time is 10 seconds; (2) Treat the germ rice with hot steam, the temperature is 200°C, The flow velocity is 2 m / s, and the action time is 10 seconds; (3) The germ rice is cooled by medium-temperature air, the air temperature is 45°C, the humidity is 40%, the flow velocity is 2 m / s, and the action time is 10 seconds; ( 4) Treat the germ rice grains with air, the air temperature is 20°C, the humidity is 20%, the flow rate is 3 m / s, and the action time is 10 seconds.

Embodiment 2

[0018] Germ rice was placed on the conveyor belt at a conveying speed of 1.5 kg / s, preheated by hot air, treated with superheated steam, cooled by air step by step, and stored at room temperature (25±3°C, 65±3% RH). The specific heat treatment is as follows:

[0019] (1) Preheat the germ rice with hot air at 60°C, the air velocity is 4 m / s, the humidity is 40%, and the action time is 15 seconds; (2) The germ rice is treated with hot steam, the temperature is 220°C, The flow velocity is 2.5 m / s, and the action time is 15 seconds; (3) The germ rice is cooled by medium-temperature air, the air temperature is 50°C, the humidity is 50%, the flow velocity is 3 m / s, and the action time is 20 seconds; ( 4) Treat the germ rice grains with air, the air temperature is 25°C, the humidity is 30%, the flow rate is 4 m / s, and the action time is 20 seconds.

Embodiment 3

[0021] Germ rice was placed on the conveyor belt at a conveying speed of 2 kg / s, preheated by hot air, treated with superheated steam, cooled by air step by step, and stored at room temperature (25±3°C, 65±3% RH). The specific heat treatment is as follows:

[0022] (1) Preheat the germ rice with hot air at 65°C, the air velocity is 5 m / s, the humidity is 60%, and the action time is 20 seconds; (2) Treat the germ rice with hot steam, the temperature is 250°C, The flow velocity is 3 m / s, and the action time is 20 seconds; (3) The germ rice is cooled by medium-temperature air, the air temperature is 55°C, the humidity is 60%, the flow velocity is 4 m / s, and the action time is 25 seconds; ( 4) Treat the germ rice grains with air, the air temperature is 30°C, the humidity is 40%, the flow rate is 5 m / s, and the action time is 30 seconds.

[0023] Effectiveness analysis:

[0024] (1) Effect of heat treatment on physical and chemical indicators of germ rice

[0025] Mo...

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Abstract

The present invention relates to a method for extending a storage period of embryo rice, which is characterized by using a method of air preheating, superheated steam treatment, and air step-by-step cooling to achieve the purpose of extending the storage period of the embryo rice. The superheated steam treatment can kill worm eggs hidden in rice grains, passivate the activities of lipoxygenase and lipase in the embryo rice, and inhibit lipid oxidation. The use of air preheating and air step-by-step cooling treatment can prevent the embryo rice from cracking and nutrient losses to some extent. The method can significantly improve the storage period of the embryo rice.

Description

technical field [0001] The invention relates to a method capable of prolonging the storage period of germ rice, belonging to the field of fresh-keeping of agricultural products. Background technique [0002] Germ rice refers to rice with a germ retention rate of more than 80% (GB 8875-1988). It is a kind of rice that retains the germ part of the rice, and the other parts are exactly the same as white rice. Brown rice is composed of cortex, germ and endosperm, among which rice germ is the most nutritious. Germ rice retains the rice germ, so it is richer in sugar, protein, fat and vitamins than polished white rice. However, because the rice germ part also contains more enzymes, enzymatic rancidity is more likely to occur under suitable conditions and is beneficial to microbial reproduction, so the storage stability of germ rice is poor and it is not easy to preserve. [0003] At present, low-temperature storage, vacuum or air-filled (carbon dioxide, nitrogen or other inert g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B9/02
Inventor 刘成梅钟业俊付桂明
Owner NANCHANG UNIV
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