MySheen

What are the reasons for the deterioration of salted mushrooms and their control measures

Published: 2024-11-05 Author: mysheen
Last Updated: 2024/11/05, During the curing process, if the film and fungus flower appear, it indicates that the surface is contaminated with yeast or mold, which can make the tissue soft, lose its gel and cause spoilage. If contaminated by rotten bacteria, protein and amino acids can be decomposed into indole, hydrogen sulfide, etc., which will produce odor and other toxic substances. Reasons for deterioration: (1) Low salt concentration or high pH value: General salt solution requires salinity above 22 Baume degrees, pH value between 4 and 5, and should be adjusted in time during the curing process.

In the curing process, if the film and fungus flowers appear, it means that the surface is contaminated by yeast or mold, which can soften the tissue, lose gelatinity and lead to corruption. If contaminated by spoilage bacteria, proteins and amino acids can be decomposed into indole, hydrogen sulfide, etc., which will produce stench and other toxic substances.

The cause of deterioration:

The main results are as follows: (1) the concentration of salt solution is low or the pH value is on the high side: generally, the salinity of salt solution is above 22 Baume, and the pH value is between 4 and 5, which should be adjusted in time in the curing process.

(2) improper curing method: Flammulina velutipes should not be salted by original pickling method (dry salting of one layer of mushroom and one layer of salt). Dry curing usually occurs mildew and sour in the upper layer, blackening in the lower layer, and only normal in the middle layer. This is because the mushroom body in the cylinder is caused by uneven salt, there is little salt in the upper layer, and the mushroom body is often exposed to air, so it is easy to be contaminated by bacteria and molds; after the salt is dissolved, it sinks into the bottom, and the lower salinity increases, which makes the mushroom body black. the salinity of the middle layer is moderate, so the effect of salinization is better.

(3) poor sealing of salt water: in the process of curing and preservation, salt water should be used to seal the container so that the mushroom body can be preserved below the liquid level. When the mushroom body is exposed, due to long-term contact with the air, it will not only cause decay and deterioration, but also make the mushroom body vitamin C (vitamin C) destroyed by oxidation. In addition, the quality of pickling will also affect the quality of processing, iron compounds or hydrogen sulfide and other substances in the water will blacken the mushroom body. Therefore, the water quality must meet the national drinking water hygiene standards.

 
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