
36
ssf for foods and beverages
rods, one of which is the drive rod that can rotate the bottles and the
substrates (see Figure2.4).
2.3.3 Semipermeable Plastic Bags
Semipermeable plastic bags are the containers made by semipermeable
plastic films. Air can freely pass the plastic film but the water vapor
cannot. e semipermeable plastic bags are usually used in the culture
of edible and medicinal mushrooms. It is similar to the solid- state fer-
mentation in the glass flasks or plastic bottles.
2.3.4 Heap Fermentation
is type of fermentation is usually used in the traditional compost and
silage (Camu et al., 2008). In the heap fermentation, just ...