Enhancement of carbon dioxide fixation by alteration of illumination during Chlorella vulgaris -Buitenzorg's growth

Authors :: Wijanarko, Anondho
Dianursanti
Gozan, Misri
Andika, Sang
Widiastuti, Paramita
Hermansyah, Heri
Witarto, Arief
Asami, Kazuhiro
Soemantojo, Roekmijati
Ohtaguchi, Kazuhisa
Koo, Song
Source :: Biotechnology and Bioprocess Engineering; December 2006, Vol. 11 Issue: 6 p484-488, 5p
Publication Year :: 2006
Abstract: Abstract: Alteration of illumination with optimum carbon dioxide fixation-based curve in this research successfully enhanced the CO<subscript>2</subscript>-fixation (q<subscript>co2</subscript>) capability ofChlorella vulgaris Buitenzorg cultivated in a bubble column photo bioreactor. The level of CO<subscript>2</subscript> fixation was up to 1.91 times that observed from cultivation with intensification of illumination on an optimum growth-based curve. During 144 h of cultivation, alteration of light intensity on an optimum CO<subscript>2</subscript>-fixation-based curve produced a q<subscript>CO2</subscript> of 6.68 h<superscript>−1</superscript>. Increases in light intensity based on a curve of optimum CO<subscript>2</subscript>-fixation produced a final cell concentration of about 5.78 g/L. Both cultivation methods were carried out under ambient pressure at a temperature of 29°C with a superficial gas velocity of 2.4 m/h (U<subscript>G</subscript>). Cells were grown on Beneck medium in a 1.0 L Bubble Column Photo bioreactor illuminated by aPhillips Halogen Lamp (20 W/12 V/50 Hz). The inlet gas had a carbon dioxide content of 10%.

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