Malaysian Applied Biology Journal

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48_01_27

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Malays. Appl. Biol. (2019) 48(1): 193–198

 

BIO-DEGRADATION OF POLYHYDROXYALKANOATES (PHA)

FILMS IN SOIL AND LAKE ENVIRONMENT


SEVAKUMARAN VIGNESWARI1, NURUL SHUHADA BT RASHID2

and AL-ASHRAF ABDULLAH AMIRUL 2,3*


1School of Fundamental Science, Universiti Malaysia Terengganu,

21300 Kuala Nerus, Terengganu, Malaysia

2School of Biological Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia

3Malaysian Institute of Pharmaceuticals and Nutraceuticals, NIBM, 11700 Gelugor,

Pulau Pinang, Malaysia

*E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it


Accepted 24 January 2019, Published online 20 March 2019

 

ABSTRACT

The use of petroleum-based synthetic plastics has led to a deleterious solid waste management especially in the form of marine debris and presents a major growing global pollution problem. In response to these issues, the application of biobased and biodegradable polymers as an alternative to synthetic plastics has been proposed. Polyhydroxyalkanoates (PHA) is a biodegradable microbial polymer. In this study, the biodegradation of this PHA both in soil and lake environment was evaluated. The percentage of degradation of the PHAs with various monomers such as poly (3-hydroxybutrate) [P(3HB)] and its copolymers poly(3-hydroxybutyrate-co-4-hydroxybutyrate) [P(3HB-co-4HB] in soil and lake was carried out. Besides, the modifications of these biopolymers into salt-leached films were also tested. Based on the results obtained, P(3HB-co-4HB) films showed the highest rate of degradation for both lake and soil environment. Also the degradation of PHA, mainly caused by microbial activity, isolation and identification microorganisms capable of degrading PHA was also carried out. Based on the degradation index, Pseudomonas species and Acidovorax species were isolated.

Key words: PHA, P(3HB-co-4HB), degradation

 

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