alexa Biodegradation of Starch Blended High Density Polyethylene using Marine Bacteria Associated with Biofilm Formation and its Isolation Characterization | Abstract
ISSN: 1948-5948

Journal of Microbial & Biochemical Technology
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Research Article

Biodegradation of Starch Blended High Density Polyethylene using Marine Bacteria Associated with Biofilm Formation and its Isolation Characterization

Thangavelu Muthukumar1,3, Adithan Aravinthana1, R Dineshram2, Ramasamy Venkatesan2 and Mukesh Doble1*

1Bioengineering and Drug Design Lab, Department of Biotechnology, Indian Institute of Technology Madras, Chennai, India

2OSTI, National Institute of Ocean Technology, Chennai, India

3Bio-products Laboratory, Central Leather Research Institute, Adyar, Chennai, India

*Corresponding Author:
Mukesh Doble
Bioengineering and Drug Design Lab
Department of Biotechnology
Indian Institute of Technology Madras
Chennai, Tamilnadu 600036, India
Tel: +91 44 2257 4107
Fax: +91 44 2257 4102
E-mail: [email protected]

Received date: February 14, 2014; Accepted date: February 26, 2014; Published date: March 03, 2014

Citation: Muthukumar T, Aravinthana A, Dineshram R, Venkatesan R, Doble M (2014) Biodegradation of Starch Blended High Density Polyethylene using Marine Bacteria Associated with Biofilm Formation and its Isolation Characterization. J Microb Biochem Technol 6:116-122. doi: 10.4172/1948-5948.1000131

Copyright: © 2014 Muthukumar T, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited

Abstract

The biofouling and biodegradation of starch blended high density polyethylene (HDPE) was studied by immersing it in Bay of Bengal (India) for a period of six months. A positive correlation was observed amongst the various constituents in the biofilm. FTIR spectrum showed the formation of C-O stretching band and decrease in ester and keto carbonyl bands indicating biodegradation. 17% weight loss was observed, while the polymer surface turned hydrophilic. Twenty two bacterial strains were isolated from the biofilm and biochemically characterized. 16sRNA sequence analysis was performed for three strains. In vitro biodegradation of the polymer exposed to sunlight for 150 days incubated with the isolated pure strain (Exiguobacterium) and combination of two strains (Exiguobacterium and B. subtilis) for 75 days, showed a gravimetric weight loss of 4.7 and 12.1% respectively indicating synergy between the two organisms. The current study indicated, the isolated microorganisms could degrade starch blended HDPE.

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