ISSN:
1573-5176
Keywords:
cyanobacterium
;
Scytonema
;
antibiotic
;
bioreactor
;
optimization
;
immobilization
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract A photobioreactor was constructed using either anchored polyurethane foam strips (1 × 1 × 40 cm, PU-strips) fixed on a stainless-steel ring to prevent flotation, or free-floating polyurethane foam blocks (1 × 1 × 1 cm, PU-blocks) as biomass supporting materials (BSM). The cyanobacterium,Scytonema sp. TISTR 8208, which produces an antibiotic, was immobilized onto PU-strips or -blocks. The free-floating PU-blocks could immobilize only about 70% of the total cells, while the anchored PU-strips could immobilize as much as 97%. PU-strips were chosen as the BSM and we named this type of reactor, seaweed-type bioreactor (STB). Optimal physical conditions for antibiotic production were determined in the STB. Inoculum density was 0.4 g l−1 and cells were sparged with air containing 5% CO2 circulated at the gas flow rate of 250 ml min−1 and illuminated at a light intensity of 200 μmol photon m−2 s−1. The production of antibiotic could be increased 3-fold.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02182408
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