1, enzyme shelf life is generally two years, enzyme liquid opened to drink as soon as possible, enzyme in the national food management, the provisions of the shelf life is two years. In fact, the longer the enzyme is stored, the better it will not deteriorate.

2. The fermentation process is a complex microbial physiological and metabolic process, and the types of substances it produces are more diverse. Essentially, there is no difference between making enzymes and making sauerkraut, kimchi, or wine.

3, "homemade enzyme" products are sugar and fruit fermentation after the product, that is, "fruit kimchi" plus "low sweet fruit wine" mixture.

1, the shelf life of the problem is not very good, if you do not take into account the activity of the bacteria, the fertilizer alone, the longer the better; but if you take into account the quality of the bacteria and the activity of the bacteria, it is not quite suitable for a long time, half a year or so can be better to maintain the activity.

2, but I feel that the use of less need to consider this issue, the amount is still quite large, the side to do with the use of has been a succession. pH measured out should be between 3 ~ 4.

Reference Baidu Encyclopedia fermentation? Phoenix food expired can still eat