Cultivation of Scenedesmus dimorphus for C/N/P removal and lipid production|
Xu, Xinmiao; Shen, Ying & Chen, Jiacheng
Background: CO2 emission,water pollution and petroleumshortage are the issues comingwith the development
of industry. A cost effective system was constructed to fix the CO2 in flue gas (15% CO2), remove nitrogen and
phosphorus from manure wastewater and produce biofuels at the same time. The significant cultivation
conditions were selected by Plackett–Burman design, and then optimized with central composite design.
Results: Optimum culture condition was predicted at light intensity of 238 μmol·m-2·s-1, TN of 152 mg·L-1,
inoculum density of 0.3 g·L-1, under which the measured CO2 fixation rate, total nitrogen and phosphorus
removing rate, and lipid content were 638.13 mg·L-1·d-1, 88.16%, 73.98% and 11.9%, respectively. The lipid
content was then enhanced to 24.2% by a nitrogen starvation strategy.
Conclusion: A cultivation strategy was suggested to achieve effective C/N/P removal from flue gas and manure
wastewater, and meanwhile obtained high lipid content from microalgal biomass.
CO2 fixation rate; Flue gas; Lipid content; Scenedesmus dimorphus; Wastewater