Biodegradation of Poly (L-lactic acid) Enhanced by Effective Microorganisms

Abstract

The mixture of photosynthesis bacteria, lactic acid bacteria, and yeast (EM) were added to gardening soil and manipulated compost system in order to enhance the biodegradation of poly (L-lactic acid) (PLA). In the presence of EM, the degradation was enhanced by 40 % in aerobic composting system at 36°C. It is noted that EM enhanced degradation of crystallite region at 50 °C. However, EM did not enhance the degradation of PLA in gardening soil.