Abstract
Polyhydroxyalkanoates (PHA) are gaining attention due to their resemblance to conventional plastics and complete biodegradability on disposal. The widespread use of this polymer is restricted due to its high production cost. The use of inexpensive and renewable carbon substrates such as agroindustrial wastes and by-products as PHA feedstock can contribute to as much as 40–50 % reduction in the PHA production cost. Gram-positive bacteria such as Bacillus spp. are potential contenders for industrial scale PHA production due to their rapid growth, ability to produce various hydrolytic enzymes, accumulation of copolymers from structurally unrelated carbon sources and lack of lipopolysaccharide (LPS) layer. Therefore, there is a need to screen for bacteria belonging to the genus Bacillus capable of producing appreciable amounts of PHA from complex carbon sources.
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