Portal de Periódicos da CAPES

Hydrogen and Polyhydroxybutyrate Producing Abilities of Bacillus spp. From Glucose in Two Stage System

2011; Springer Science+Business Media; Volume: 51; Issue: 4 Linguagem: Inglês

10.1007/s12088-011-0236-9

0973-7715

Sanjay K. S. Patel, Mamtesh Singh, Vipin Chandra Kalia,

Microbial Metabolic Engineering and Bioproduction

Metabolic activities of four Bacillus strains to transform glucose into hydrogen (H2) and polyhydroxybutyrate (PHB) in two stages were investigated in this study. Under batch culture conditions, Bacillus thuringiensis EGU45 and Bacillus cereus EGU44 evolved 1.67–1.92 mol H2/mol glucose, respectively during the initial 3 days of incubation at 37°C. In the next 2 days, the residual glucose solutions along with B. thuringiensis EGU45 shaken at 200 rpm was found to produce PHB yield of 11.3% of dry cell mass. This is the first report among the non-photosynthetic microbes, where the Bacillus spp.—B. thuringiensis and B. cereus strains have been shown to produce H2 and PHB in same medium under different conditions.