Biodegradation of various polyorganosiloxanes (about 30 substances) un
der the influence of several biotype bacteria strain (16 types) were s
tudied. A special procedure of biodegradation and analytical methods o
f evaluation the degree of degradation were applied. It was found that
nearly all polysiloxanes tested are biodegradable but the degree of d
egradation depends on their composition and structure, as well as on t
he type of bacteria strain chosen.