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A method for removing cadmium in rice by acid-solution combined fermentation

A rice, acid-soluble technology, applied in the direction of bacteria, application, multi-step food processing, etc. used in food preparation, to achieve the effects of good cadmium removal, low cost and strong operability

Active Publication Date: 2018-05-11
HUNAN AGRICULTURAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The document with the Chinese application number 201510013525.3 discloses a method for removing heavy metal cadmium in rice by fermentation of compound lactic acid bacteria. The method has a good effect of removing cadmium, but it needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The rice with a cadmium content of 0.6479 mg / kg was crushed through an 80-mesh sieve; 10 g of rice flour was added to 60 mL of glacial acetic acid solution with a mass concentration of 8%, mixed thoroughly, and then shaken at a constant temperature of 35 °C for 24 h (oscillation frequency: 160 times / min); centrifuge (3500r / min, 8min) to remove the acid solution, and the rice flour obtained after removing the acid solution was washed 3 times with deionized water (the amount of deionized water used for each time was 4 times the weight of rice flour), After each cleaning, carry out centrifugal dehydration (3500r / min, 8min), then add deionized water 4 times the weight of rice flour to the rice flour after centrifugal dehydration, and mix well to obtain rice flour slurry; suspend Lactobacillus plantarum solution (strain number CICC20039) and Pediococcus pentosaceae suspension (strain number CICC22227) were mixed at a volume ratio of 2:1 (both bacterial suspensions contained 1...

Embodiment 2

[0021] The rice with a cadmium content of 0.4745 mg / kg was crushed through a 60-mesh sieve; 10 g of rice flour was added to 70 mL of a citric acid solution with a mass concentration of 10%, mixed thoroughly, and then oscillated at a constant temperature at 40 °C for 20 h (oscillation frequency: 170 times / minute); centrifuge (4500r / min, 5min) to remove the acid solution, and the rice flour obtained after removing the acid solution is washed twice with deionized water (the amount of deionized water used for each time is 3 times the weight of rice flour), After each cleaning, carry out centrifugal dehydration (4500r / min, 5min), then add deionized water 3 times the weight of rice flour to the rice flour after centrifugal dehydration, and mix well to obtain rice flour slurry; suspend Lactobacillus plantarum solution (strain number CICC20038) and Pediococcus pentosaceae suspension (strain number CICC22739) were mixed at a volume ratio of 2:1 (both bacterial suspensions contained 10 ...

Embodiment 3

[0023]The rice with a cadmium content of 0.6479mg / kg was crushed through an 80-mesh sieve; 10g of rice flour was added to 100mL of food-grade lactic acid solution with a mass concentration of 50%, mixed well, and then shaken at a constant temperature of 50°C for 12h (oscillation frequency 180 times / minute); centrifuge (3000r / min, 10min) to remove the acid solution, and the rice flour obtained after removing the acid solution is washed 4 times with deionized water (the amount of deionized water used for each time is 4 times the weight of rice flour) , after each cleaning, carry out centrifugal dehydration (3000r / min, 10min), then add deionized water 5 times the weight of rice flour to the rice flour after centrifugal dehydration, and mix well to obtain rice flour slurry; Lactobacillus plantarum Suspension (strain number CICC20765) and Pediococcus pentosaceae suspension (strain number CICC21862) were mixed at a volume ratio of 2:1 (both bacterial suspensions contained 10 7 cfu / m...

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Abstract

A method for removing cadmium in rice by acid-solution combined fermentation. The method is to crush and sieve the rice whose cadmium content exceeds the standard, and then add the rice flour obtained by sieving to an acid solution in a certain proportion, and perform constant temperature oscillation treatment after mixing. , the rice flour soaked in acid solution is washed with deionized water and centrifuged to dehydrate, and the free cadmium in the rice is initially removed; then deionized water is added to the centrifuged rice flour, and the activated Lactobacillus plantarum is suspended solution and Pediococcus pentosaceae bacteria suspension were inserted into it, kept at constant temperature for fermentation, and the fermented rice flour was washed with deionized water and centrifuged again to further remove the free cadmium ions in the rice, and finally the dehydrated large The rice flour is dried to obtain a rice flour product with significantly reduced cadmium content. Using this method, the removal rate of cadmium in rice is as high as 90%, which can not only effectively remove heavy metal cadmium in rice, but also provide certain technical support for the safe transformation of "cadmium rice".

Description

technical field [0001] The invention belongs to the technical field of rice deep processing, and relates to a method for removing cadmium in rice, in particular to a method for removing cadmium in rice by acid-solution combined fermentation technology. Background technique [0002] As a major producer of rice in the world, China accounts for about 30% of the world's total rice output. According to incomplete statistics, more than 60% of China's population uses rice as a staple food. With the rapid development of modern industry, heavy metal cadmium is invading rice through polluted soil, and the pollution of cadmium in rice is becoming more and more serious, which has become one of the major food safety problems facing the world. Lei Ming (2010) conducted an investigation and analysis of rice in polluted areas and markets in Hunan Province and found that 36% of the rice samples had excessive cadmium; in 2010, it was reported that 1 / 5 of China's cultivated land was polluted b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L5/20A23L7/104
CPCA23V2002/00A23V2400/427A23V2400/169A23V2300/38
Inventor 吴卫国傅亚平廖卢艳王巨涛
Owner HUNAN AGRICULTURAL UNIV
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