Effect of CO₂ supply conditions on lipid production of Chlorella vulgaris from enzymatic hydrolysates of lipid-extracted microalgal biomass residues.
The hydrolysates from lipid-extracted microalgal biomass residues (LMBRs) were used as a source of nutrients for the cultivation of Chlorella vulgaris for lipid production under various CO(2) supply conditions, including different CO(2) concentrations and aeration rates. Both parameters had a significant effect on lipid production. A CO(2) concentration of 5% was found to be most suitable for microalgal growth. Microalga grew best at a CO(2) aeration rate of 0.5 vvm. At this rate, biomass concentration and lipid productivity were at a maximum of 3.83 g L(-1) and 157 mg L(-1)d(-1), respectively, but decreased at lower or higher aeration rates. The present results showed that LMBRs utilization was effective in microalgal lipid production under suitable CO(2) supply conditions.
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, No. 5 Xinmofan Road, Nanjing 210009, People's Republic of China.
Hongli
H
Zheng
Zhen
Z
Gao
Fengwei
F
Yin
Xiaojun
X
Ji
He
H
Huang
D000332:Aerobiosis / Q000187:drug effects; D000596:Amino Acids / Q000032:analysis; D018533:Biomass; D002241:Carbohydrates / Q000032:analysis; D002245:Carbon Dioxide / Q000494:pharmacology*; D048408:Chlorella vulgaris / Q000166:cytology / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D002734:Chlorophyll / Q000378:metabolism; D000077194:Chlorophyll A; D004798:Enzymes / Q000378:metabolism*; D005227:Fatty Acids / Q000032:analysis; D006868:Hydrolysis / Q000187:drug effects; D008055:Lipids / Q000096:biosynthesis* / Q000737:chemistry*; D058086:Microalgae / Q000166:cytology / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*
D000596:Amino Acids; D002241:Carbohydrates; D004798:Enzymes; D005227:Fatty Acids; D008055:Lipids; D002734:Chlorophyll; D002245:Carbon Dioxide; D000077194:Chlorophyll A