Method for removing nitrite from salted fish

A technology for nitrite and salted fish, applied in the field of nitrite treatment, can solve the problems of difficult operation, insignificant effect, difficult to popularize, etc., and achieve the effect of soft and smooth taste and rich meat flavor.

Inactive Publication Date: 2015-01-07
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies, the purpose of the present invention is to provide a method for eliminating nitrite in salted fish, to solve the problem that in the prior art, the content of nitrate and nitrite in salted fish cannot be greatly reduced, the operation is difficult, and the effect is not good. Obvious and difficult to generalize problems

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  • Method for removing nitrite from salted fish

Examples

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Effect test

Embodiment 1

[0027] The method for eliminating nitrite in salted fish of the present invention includes the following steps:

[0028] (1) Rinse the salted fish with clean water to remove the salt on the surface, divide them into blocks, place them in 8% dilute hydrochloric acid, soak for about 18 hours, then wash and drain the block salted fish, repeat twice;

[0029] (2) Soak the washed block salted fish in deionized water at 50°C for 1 hour, and centrifuge for 4 times;

[0030] (3) Soak the treated salted fish in the conditioning agent for 10 minutes, and perform ultrasonic treatment while soaking. The ultrasonic power is 180-220W, the ultrasonic frequency is 35KHZ, and the treatment time is 18 minutes, then pick up and drain;

[0031] (4) Put the treated salted fish into the pool, inoculate it with autotrophic denitrifying bacteria, and use inorganic sulfur as the substrate to provide hydrogen and inorganic carbon sources. The denitrifying bacteria utilize NO under anaerobic conditions. 3 - Conv...

Embodiment 2

[0040] The method for eliminating nitrite in salted fish of the present invention includes the following steps:

[0041] (1) Rinse the salted fish with clean water to remove the surface salt, divide them into blocks, put them in 10% dilute hydrochloric acid, soak for about 22 hours, then wash and drain the block salted fish, repeat twice;

[0042] (2) Soak the washed block salted fish in deionized water at 70°C for 1 hour, and centrifuge for 5 times;

[0043] (3) Soak the treated salted fish in the conditioning agent for 20 minutes, and perform ultrasonic treatment while soaking. The ultrasonic power is 200W, the ultrasonic frequency is 40KHZ, and the treatment time is 20min, then pick up and drain;

[0044] (4) Put the treated salted fish into the pool, inoculate it with autotrophic denitrifying bacteria, and use inorganic sulfur as the substrate to provide hydrogen and inorganic carbon sources. The denitrifying bacteria utilize NO under anaerobic conditions. 3 - Convert to N 2 , The ...

Embodiment 3

[0053] The method for eliminating nitrite in salted fish of the present invention includes the following steps:

[0054] (1) Rinse the salted fish with clean water to remove the salt on the surface, divide them into blocks, place them in 15% dilute hydrochloric acid, soak for about 28 hours, then wash and drain the block salted fish, repeat 3 times;

[0055] (2) Soak the washed block salted fish in deionized water at 85°C for 2 hours, and centrifuge for 6 times;

[0056] (3) Soak the treated salted fish in the conditioning agent for 30 minutes, and perform ultrasonic treatment while soaking. The ultrasonic power is 220W, the ultrasonic frequency is 45KHZ, and the treatment time is 25min, then pick up and drain;

[0057] (4) Put the treated salted fish into the pool, inoculate it with autotrophic denitrifying bacteria, and use inorganic sulfur as the substrate to provide hydrogen and inorganic carbon sources. The denitrifying bacteria utilize NO under anaerobic conditions. 3 - Convert t...

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Abstract

The invention discloses a method for removing nitrite from salted fish. Salt on the surface of the salted fish is washed away with clean water; the salted fish is cut into blocks; the salted fish blocks are soaked in diluted hydrochloric acid, and then cleaned and drained; the cleaned salted fish blocks are soaked in deionized water, and treated with centrifugal treatment; the treated salted fish is soaked in a modifier while being treated with ultrasonic treatment; the treated salted fish is placed in a water pool and inoculated with autotrophic denitrifying bacteria, inorganic sulfur serves as a substrate, and hydrogen and an inorganic carbon source are provided; an oxidizing agent is added into the water pool for nitrite removal. The method provided by the invention has the advantages that on the premise of guaranteeing the traditional characteristics of the salted fish, the modifier is combined with the ultrasonic treatment to substantially remove the nitrite generated during the salted fish curing process, so as to reduce possible harm of the nitrite in the salted fish to human bodies, and obtain salted fish products with low salt contents; meanwhile, the method also achieves the preservative and fresh-keeping effects of the salted fish under a low salt condition, so that the rich fish meat flavor is maintained, and the fish tastes soft, crispy and tender.

Description

Technical field [0001] The invention relates to the technical field of nitrite treatment, in particular to a method for eliminating nitrite in salted fish. Background technique [0002] Salted fish is a traditional processed and preserved aquatic product. Because of its unique flavor, it is favored by the public. With the improvement of consumers’ food safety awareness, its safety issues have also attracted attention. Aiming at the high incidence of nasopharyngeal cancer and gastric cancer in the southern coastal areas, many scholars have conducted nitrate and nitrite treatments on pickled aquatic products. Nitrosamines and other content tests have detected different levels of carcinogenic nitrosamines. In fish foods, especially those pickled with crude salt or nitrite as a preservative, the content of nitrosamine can be as high as about 10-100 micrograms / kg. Because the crude salt contains nitrate and nitrite, among which nitrate Under the action of microorganisms, it can be r...

Claims

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Application Information

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IPC IPC(8): A23L1/326A23L1/015A23L17/10A23L5/20
Inventor 张丽华励建荣李学鹏仪淑敏孙协军李秀霞高虹毕海燕白凤翎曾凌冯彦博马春颖王桂娇赵丽红徐永霞
Owner BOHAI UNIV
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