Effect of polylactic acid (PLA) on growth of edaphon and biodegradation property of PLA
PLA对土壤微生物生长的影响及PLA的生物降解性

Ninety-one strains were isolated from different soil samples in four different parts. These microorganisms were classifid as bacteria,azotobacter,cellulose decomposing bacteria and actinomycetes. Then PLA were added to the corresponding liquid medium to determine the effect of those four kinds of different soil microorganisms on the degradation of PLA and the effect of PLA on the growth of various microorganisms. The results indicated that different types of microbials showed significant difference of the degradation ability on PLA. During the test period,the total degradation rate of PLA to Actinomycetes was the highest,and the degradation ability of RB-4 was at the highest rate of around 3%. The average degradation ability of both HX-8 and RG-28 could reach 2.4% everyday. The degradation products of PLA had a strong inhibition to bacteria and cellulolytic bacteria in general.