Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4980930 | Process Safety and Environmental Protection | 2016 | 35 Pages |
Abstract
Chlorella vulgaris was cultivated in a hybrid (two-stage) system. The effect of the transferring time from nutrient-replete phase with a low light intensity (photobioreactor) to the nutrient deprivation phase (open pond) with a higher light intensity, as well as the effect of initial cell concentration in the deprivation phase, on the growth rate and lipid content of the microalgae was investigated. The microalgae were transferred to the nutrient deprived medium at different intervals with various initial cell concentrations. Transferring the cultivated medium of the 4th day with the initial cell concentration of 66 mg Lâ1 into the deprivation phase resulted in a highest lipid productivity of 9.21 ± 0.64 mg Lâ1 dâ1 and lipid content of 53.97 ± 4.30%. In a single-stage cultivation where a medium with nitrogen deficiency was used, despite a low lipid content (maximum 30%), a lipid productivity of 9.95 ± 0.46 mg Lâ1 dâ1 was observed that was slightly higher than that for the hybrid system.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Health and Safety
Authors
Malikeh Heidari, Hamid-Reza Kariminia, Jalal Shayegan,