is associated with the oxidation of organic substances
(nitrogen-containing substances including) by microorganisms, it
can be assumed that in the course of time the composition of
the co-culture in the bioreceptor may change. More rapidly growing microorganisms may drive out those that grow slower. This
work obtained the growth curves of the microorganisms used. The
dependences of the optical density of culture liquid on time are
given in Table 2.