Potential of Bacillus sp. to produce polyhydroxybutyrate from biowaste.
OBJECTIVE
To test the Bacillus strains for their abilities to produce polyhydroxybutyrate (PHB) from different sugars and biowaste (Pea-shells).


RESULTS
Six Bacillus strains were checked for their ability to produce PHB from GM2 medium supplemented with different sugars at the rate of 1% (w/v) and from biowaste and GM2 (BW : M) combinations (3 : 7, 1 : 1, 7 : 3). Glucose supplemented GM2 medium resulted in maximum PHB production of 435 mg l(-1) constituting 31-62% w/w of the total cell dry mass. Substituting GM2 medium to the extent of 50% with biowaste (pea-shell slurry) resulted in 945-1205 mg l(-1) PHB (55-65% w/w). Optimization for additional nitrogen supplementation, inoculum size resulted in a final PHB production of 3010-3370 mg l(-1) equivalent to 300 g kg(-1) biowaste (dry wt).


CONCLUSIONS
The Bacillus strains were able to produce PHB from biowaste (Pea-shells) as cheap source of substrate.


CONCLUSIONS
This is the first report on usage of pea-shells as feed for PHB production, opening new possibilities for its use for production of PHB and Bacillus as potential candidate for the purpose.
Kumar
T
T
Microbial Biotechnology and Genomics, Institute of Genomics and Integrative Biology, CSIR, Delhi University Campus, Delhi, India.
Singh
M
M
Purohit
H J
HJ
Kalia
V C
VC
D001407:Bacillus / Q000254:growth & development / Q000378:metabolism*; D001673:Biodegradation, Environmental; D003470:Culture Media; D004187:Disaccharides / Q000378:metabolism*; D005285:Fermentation; D006601:Hexoses / Q000378:metabolism*; D006885:Hydroxybutyrates / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism; D018532:Pisum sativum; D014866:Waste Products
D003470:Culture Media; D004187:Disaccharides; D006601:Hexoses; D006885:Hydroxybutyrates; D014866:Waste Products; D009584:Nitrogen