Biodegradability Studies of Linear Low Density Polyethylene and its Blends Using Composted Municipal Solid Waste

Abstract

Biodegradation of polymers is a promising method for solving various environmental issues. Present study illustrates the biodegradation of linear low density polyethylene (LLDPE) and its blends using municipal solid waste compost under controlled composting conditions according to modified ASTM D 5338 (2003). Composting of samples was carried out for a period of 45 days and the resulting samples were checked for the biodegradation by weight loss, spectroscopic analysis as well as by the protein concentration estimation. Percent weight loss of samples after degradation was found to be as high as 5.72%. Microbial biomass present on the polymer films revealed increases in protein concentration which proves the formation of biofilm on the samples. Spectroscopic analysis was carried out by Fourier Transform Infrared Spectroscopy which revealed the formation of as well as disappearance of various functional groups clearly showing the extent of biodegradation caused by various microorganisms present in the compost. The possible reason of observed changes was also discussed. All these observations confirmed that significant degradation of polyethylene and its blends occurred by composting method.