| Full text | |
| Author(s): |
Bezerra, Raquel Pedrosa
[1, 2]
;
Matsudo, Marcelo Chuei
[1]
;
Sato, Sunao
[1]
;
Converti, Attilio
[2]
;
Monteiro de Carvalho, Joo Carlos
[1]
Total Authors: 5
|
| Affiliation: | [1] Univ Sao Paulo, Fac Pharmaceut Sci, Dept Biochem & Pharmaceut Technol, BR-05508900 Sao Paulo - Brazil
[2] Univ Genoa, Dept Chem & Proc Engn GB Bonino, I-16145 Genoa - Italy
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | BioEnergy Research; v. 6, n. 3, p. 1118-1125, SEP 2013. |
| Web of Science Citations: | 9 |
| Abstract | |
To reduce CO2 emissions from alcoholic fermentation, Arthrospira platensis was cultivated in tubular photobioreactor using either urea or nitrate as nitrogen sources at different light intensities (60 mu mol m(-2) s(-1) a parts per thousand currency signaEuro parts per thousand I a parts per thousand currency signaEuro parts per thousand 240 mu mol m(-2) s(-1)). The type of carbon source (pure CO2 or CO2 from fermentation) did not show any appreciable influence on the main cultivation parameters, whereas substitution of nitrate for urea increased the nitrogen-to-cell conversion factor (Y (X/N) ), and the maximum cell concentration (X (m) ) and productivity (P (X) ) increased with I. As a result, the best performance using gaseous emissions from alcoholic fermentation (X (m) = 2,960 +/- 35 g m(-3), P (X) = 425 +/- 5.9 g m(-3) day(-1) and Y (X/N) = 15 +/- 0.2 g g(-1)) was obtained at I = 120 mu mol m(-2) s(-1) using urea as nitrogen source. The results obtained in this work demonstrate that the combined use of effluents rich in urea and carbon dioxide could be exploited in large-scale cyanobacteria cultivations to reduce not only the production costs of these photosynthetic microorganisms but also the environmental impact associated to the release of greenhouse emissions. (AU) | |