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Effects of photobioreactors design and operating conditions on Stichococcus bacillaris biomass and biodiesel production

Paper ID Volume ID Publish Year Pages File Format Full-Text
3396 168 2013 7 PDF Available
Title
Effects of photobioreactors design and operating conditions on Stichococcus bacillaris biomass and biodiesel production
Abstract

Indoor cultures of Stichococcus bacillaris were carried out to investigate the effect of pH, CO2, and hydrodynamics on biomass and biodiesel productivity in a 0.6 L vertical bubble column (VBC) and a 1.7 L inclined bubble column (IBC) photobioreactor. The temperature and the irradiance level were set at 23 °C and 300 μE/(m2 s), respectively. The pH of the liquid culture was in the range 3.0–8.5. The CO2 concentration in the gas phase was increased up to 15%, typical of exhaust gas from power plants. The increased CO2 concentration in the gas phase stimulated the microalgal growth. Tests carried out at different pH and spreading a 5% CO2 gas stream showed that the biomass productivity was maximum at a pH of about 7.0. Acid and alkaline conditions can also be adopted with an approximate 25% decrease in biomass productivity. The comparison between a IBC and a VBC reactor operated under the same conditions pointed out that the performances of IBC were higher than those of VBC: 0.26 gbiomass/(L d) and 0.032 gFAME/(L d) for IBC, and 0.124 gbiomass/(L d) and 0.010 gFAME/(L d) for VBC. IBC was characterized by an intensive liquid circulation that promotes a continuous renewal of microalgal cells in the photic zone.

► Autotrophic cultures of Stichococcus bacillaris were carried to produce biodiesel. ► Two photobioreactor configurations were investigated. ► Effects of pH, CO2 concentration and hydrodynamics were investigated. ► Biomass and FAME productivity were optimized: 0.26 g/(L d) and 0.032 g/(L d).

Keywords
Biodiesel; Microalgae; Photobioreactor; Bubble column; Stichococcus bacillaris
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Effects of photobioreactors design and operating conditions on Stichococcus bacillaris biomass and biodiesel production
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 74, 15 May 2013, Pages 8–14
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us