ABSTRACT
The other process, which is of equal importance, is
preservation of the product of microbiological trans-
formation. The preservation process depends, among
other things, on product applicability, the way it is
utilized, storage possibility, and conditions. Some-
times the product can be used jointly with by-
products and unreacted residues of the culture med-
ium and nutrients. Then, it is a raw material for
microbiological concentrates (as a result of filtration,
concentration, or drying). When the product is used
as a purely microbiological material, it should be
separated from the fermentation medium, impurities,
and residues of reagents, and then the purified sub-
stance should be concentrated and preserved by re-
moval of solvent (water) through freezing or drying.
