Optimization of cultivation conditions for combined nutrient removal and CO2 fixation in a batch photobioreactor

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dc.contributor.authorAl Ketife, Ahmed M. D.
dc.contributor.authorJudd, Simon J.
dc.contributor.authorZnad, Hussein
dc.date.accessioned2016-09-28T12:55:08Z
dc.date.available2016-09-28T12:55:08Z
dc.date.issued2016-09-09
dc.description.abstractThe application of Chlorella vulgaris for simultaneous CO2 biofixation and nutrient removal has been optimised using response surface methodology (RSM) based on Box Behnken design (BBD). Experimental conditions employed comprised CO2 concentrations (Cc,g) of 0.03-22% CO2, irradiation intensities (I) of 100-400 μE, temperatures of 20-30°C and nutrient concentrations of 0-56 and 0-19 mg/L nitrogen and phosphorus respectively, the response parameters being specific growth rate μ, CO2 uptake rate Rc and %nutrient removal. Results Over 10-days the biomass concentration reached almost 3 gL-1 for Cc,g of 5% CO2, with corresponding values of 0.74 g L-1 d-1 and 1.17 day-1 for Rc and μ respectively and 100% nutrient (N and P) removals. At 22% CO2 the Rc and μ decreased by around an order of magnitude, and nutrient removal also decreased to 79% and 50% for N and P respectively. Conclusion Optimum values 5% CO2, 100 μE and 22°C were identified for Cc,g, I and T respectively, with μ and Rc reaching 1.53 day-1 and 1 g L-1 d-1 respectively along with associated nutrient removal of 100%. Regression analysis indicated a good fit between experimental and model data.en_UK
dc.identifier.citationAhmed M.D. Al Ketife, Simon Judd and Hussein Znad. Optimization of cultivation conditions for combined nutrient removal and CO2 fixation in a batch photobioreactor. Journal of Chemical Technology and Biotechnology, Volume 92, Issue 5, May 2017, pp. 1085-1093en_UK
dc.identifier.issn0268-2575
dc.identifier.urihttp://dx.doi.org/10.1002/jctb.5084
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/10613
dc.language.isoenen_UK
dc.publisherWileyen_UK
dc.rightsAttribution-NonCommercial 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectAlgaeen_UK
dc.subjectChlorella vulgarisen_UK
dc.subjectPhotobioreactoren_UK
dc.subjectBox-Behnkenen_UK
dc.subjectoptimisationen_UK
dc.titleOptimization of cultivation conditions for combined nutrient removal and CO2 fixation in a batch photobioreactoren_UK
dc.typeArticleen_UK

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