Method using weak acidic electrolyzed water to keep freshness of penaeus vannamei

Abstract

The invention discloses a weak acidic electrolyzed water, which is prepared from the following raw materials: deionized water, sodium chloride, potassium chloride, ferric chloride, ammonium oxalate, sodium alginate, glycerol, and a conductive agent; wherein the conductive agent is prepared from potassium nitrate and sodium nitrate according to a certain ratio. The invention further discloses a method using the weak acidic electrolyzed water to keep the freshness of penaeus vannamei. During the preparation method of the weak acidic electrolyzed water, dangerous hydrogen gas is not generated. The content of oxidizing components in the weak acidic electrolyzed water is low, thus the freshness of penaeus vannamei can be well kept; at the same time, the prepared weak acidic electrolyzed water has a good adhesion property and an excellent film forming performance; and the provided fresh-keeping method can effectively kill harmful bacteria (staphylococcus aureus, etc.) and inhibit the growth of pathogenic bacteria and microbes that cause decomposition.

Description

technical field [0001] The invention relates to the field of preservation of aquatic products, in particular to a method for preserving freshness of Penaeus vannamei by using weakly acidic electrolyzed water. Background technique [0002] Penaeus vannamei is one of the three largest shrimp species with the highest aquaculture production in the world today. Penaeus vannamei is native to the Pacific coast of South America. Professor Zhang Weiquan of the Institute of Oceanology, Chinese Academy of Sciences first introduced this shrimp from the United States. The meat of Penaeus vannamei is delicious, the processed meat rate can be as high as 67%, the suitable temperature range is wide, it can grow at 18-32 ℃, and the salt range is also wide, it can grow under the condition of salinity 1-40‰, it is an excellent desalinated cultured species. Penaeus vannamei grows fast and has strong disease resistance. It has gradually become the main cultured shrimp species in southern my cou...

AI Technical Summary

Problems solved by technology

For example, the Chinese patent announcement number CN103355731B, the date of authorization announcement is March 18, 2015, discloses a method for fresh-keeping single-frozen shrimp with electrolyzed water. This kind of electrolyzed water is used for fresh-keeping treatment of prawns; although this kind of fresh-keeping technology has a good fresh-keeping effect, solves the problem of safety control of pathogenic microorganisms in aquatic products, and reduces the waste of fresh aquatic resources, there are still some problems; first, the invention uses Electrolyzed water is prepared by electrolyzing pure sodium chloride solution. During the electrolysis process, chlorine gas and hydrogen gas will be generated. Chlorine gas can be dissolved in water, but hydrogen gas is difficult to dissolve in water. If electrolyzed water is prepared on a large scale, the generated hydrogen gas will cause extreme Big potential safety hazard, even the danger of explosion; second, chlorine gas dissolved in water produces acid while also producing sodium hypochlorite with oxidizing effect, although sodium hypochlorite with oxidizing effect can play the role of killing bacteria in prawns , but long-term exposure to oxidizing substances in the fresh-keeping process will undoubtedly accelerate the spoilage of prawns and have side effects