The invention discloses a preparation method and application of a microbial
composite membrane for improving
flavor and quality of cured meat, and belongs to the technical field of meat curing. The microbial
composite membrane is composed of an outer bacterium-blocking breathable layer and an inner functional bacterium loading layer, the outer layer is an electrostatic
spinning bacterium-blocking breathable layer with the
pore diameter being 0.1-0.5 mu m, and the inner layer is a functional bacterium loading layer with the
pore diameter being 0.1-0.5 mu m; harmful microorganisms larger than or equal to 99.99% can be intercepted, the air permeability is larger than or equal to 5 mm / s (100 Pa), and normal proceeding of
fat oxidation and beneficial
microorganism metabolism is guaranteed; the inner layer is a freeze-
drying functional bacterium loading layer fixed by a water-
soluble polymer, the
microorganism loading density is 10-1000CFU / cm < 2 >, and the freeze-
drying functional bacterium loading layer can quickly recover and play a
ripening role after contacting with the surface of meat or absorbing
moisture, so that directional
microorganism regulation and control in the meat
ripening process are realized, and the
ripening efficiency and quality are improved. The microbial
composite membrane for improving the
flavor and quality of the cured meat has triple functions of bacterium blocking, ventilation and functional bacterium loading, and is suitable for replacing a traditional natural
fermentation or exposed curing mode. Through the synergistic effect of bacterium blocking, ventilation and directional
inoculation, traditional natural
fermentation is replaced, the
curing time is shortened by more than or equal to 20%, the infectious microbe
pollution risk is reduced, and the meat curing efficiency and safety are improved.