Background: Plastics are indispensable for our society. The extensive use of petroleumbased
plastic and dumping of the same in soil and water body greatly affects our environment and
biodiversity. However, biodegradable plastics can reduce the volume of waste in packaging
materials. Therefore, biomass-derived polymers are promising alternatives to the petroleum-based
non-degradable polymer to address the environmental issues.
Objective: A large number of reports on the synthesis and characterization of starch-based
bioplastic are available in the literature. However, a detailed biodegradation study of the starchbased
bioplastic is rarely reported. We have prepared potato starch-based bioplastic with the
combination of various plasticizers (glycerol, sorbitol, and xylitol) through hydrogel formation and
carried out their biodegradation study.
Methods: Present study investigated the biodegradation of potato starch-based bioplastic in the
natural environment, in cultured bacteria, and with fungal α-amylase.
Results: Starch-based plastic is completely degraded in the natural environment within two
months. Bacteria culture in solid media resulted in various types of bacterial colonies. Among the
various bacterial colonies, the white circular colony was the major bacteria that degrade starchbased
plastic. Furthermore, we screened the starch-based plastic degrading bacteria and isolated the
pure culture through the streak plate method.
Conclusion: In the presence of cultured bacteria and with fungal α-amylase, starch-based plastic is
completely degraded within 96 h and 48 h, respectively.