Phosphate feeding strategy during production phase improves poly(3-hydroxybutyrate-co-3-hydroxyvalerate) storage by Ralstonia eutropha.
Appl Microbiol Biotechnol 2003;
61:257-60. [PMID:
12698285 DOI:
10.1007/s00253-003-1258-y]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2002] [Revised: 12/24/2002] [Accepted: 01/03/2003] [Indexed: 11/29/2022]
Abstract
The effect of a phosphate feeding strategy and the optimal rate of biomass production ( r(x)) during the production phase of P(3HB-co-3HV) in a 6-l fermentor were determined in cultures of Ralstonia eutropha with the goal of enhancing polymer productivity. Rates of biomass production ( r(x)) between 0.00 and 0.20 gx r l(-1) h(-1) were monitored during the production phase. When a low rate of cell growth was maintained ( r(x) of 0.02 gx r l(-1) h(-1)), polymer production improved, resulting in a final cell mass, P(3HB-co-3HV) mass, and P(3HB-co-3HV) content of 98.2 g, 62.0 g and 63.1 wt%, respectively, after 27.3 h. The maximum polymer productivity obtained during the production phase was 1.36 g l(-1 )h(-1).
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