Journal of Pure and Applied MicrobiologyVol. 7 No. 4

Microbial Degradation of Starch Based Polypropylene

Shahrzad Khoramnejadian

Department of Environment, Damavand Branch, Islamic Azad University, Damavand, Iran.

Received on 11 January 2013 and accepted on 28 March 2013



Polypropylene has a special place in plastic industries. Polypropylene like other synthetic plastic doesn?t degrade by microorganisms, so remain in the nature and has a harmful effect on environment. Biodegradable plastic could help to solve this problem. In this article biodegradable blend of polypropylene and starch was prepared. Samples with different levels of starch (10% and 20%) were prepared. Pure Polypropylene and starch based samples buried in soil for 6 months and exposure to mould growth. Every two months samples removed from the soil and weight change were measured. Scanning electron microscope (SEM) approved Polypropylene/ starch blend biodegradation. Result approved that Polypropylene / Starch blend are degradable in soil. This method could be used for reduce pollution in the environment. Samples were exposure to Pseudomonas aeruginosa for 84th days. Pseudomonas aeruginosa consumed the polymer and confirmed biodegradability of compound.

Keywords : Polypropylene, Pseudomonas aeruginosa, Biodegradation.