Optimization of cultivation conditions for combined nutrient removal and CO2 fixation in a batch photobioreactor
BACKGROUND The 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 inte...
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| Format: | Journal Article |
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Wiley
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/27109 |
| _version_ | 1848752172539314176 |
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| author | Al Ketife, Ahmed Majeed Daife Judd, S. Znad, Hussein |
| author_facet | Al Ketife, Ahmed Majeed Daife Judd, S. Znad, Hussein |
| author_sort | Al Ketife, Ahmed Majeed Daife |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | BACKGROUND The 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−1 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 g L−1 for Cc,g of 5% CO2, with corresponding values of 0.74 g L−1 day−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 day−1, respectively, along with associated nutrient removal of 100%. Regression analysis indicated a good fit between experimental and model data. © 2016 Society of Chemical Industry |
| first_indexed | 2025-11-14T08:04:24Z |
| format | Journal Article |
| id | curtin-20.500.11937-27109 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:04:24Z |
| publishDate | 2016 |
| publisher | Wiley |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-271092017-09-13T15:30:51Z Optimization of cultivation conditions for combined nutrient removal and CO2 fixation in a batch photobioreactor Al Ketife, Ahmed Majeed Daife Judd, S. Znad, Hussein BACKGROUND The 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−1 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 g L−1 for Cc,g of 5% CO2, with corresponding values of 0.74 g L−1 day−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 day−1, respectively, along with associated nutrient removal of 100%. Regression analysis indicated a good fit between experimental and model data. © 2016 Society of Chemical Industry 2016 Journal Article http://hdl.handle.net/20.500.11937/27109 10.1002/jctb.5084 Wiley restricted |
| spellingShingle | Al Ketife, Ahmed Majeed Daife Judd, S. Znad, Hussein Optimization of cultivation conditions for combined nutrient removal and CO2 fixation in a batch photobioreactor |
| title | Optimization of cultivation conditions for combined nutrient removal and CO2 fixation in a batch photobioreactor |
| title_full | Optimization of cultivation conditions for combined nutrient removal and CO2 fixation in a batch photobioreactor |
| title_fullStr | Optimization of cultivation conditions for combined nutrient removal and CO2 fixation in a batch photobioreactor |
| title_full_unstemmed | Optimization of cultivation conditions for combined nutrient removal and CO2 fixation in a batch photobioreactor |
| title_short | Optimization of cultivation conditions for combined nutrient removal and CO2 fixation in a batch photobioreactor |
| title_sort | optimization of cultivation conditions for combined nutrient removal and co2 fixation in a batch photobioreactor |
| url | http://hdl.handle.net/20.500.11937/27109 |