title: Kinetic characteristics and modeling of microalgae Chlorella vulgaris growth and CO2 biofixation considering the coupled effects of light intensity and dissolved inorganic carbon.
abstract: Understanding and optimizing the microalgae growth process is an essential prerequisite for effective CO2 capture using microalgae in photobioreactors. In this study, the kinetic characteristics of microalgae Chlorella vulgaris growth in response to light intensity and dissolved inorganic carbon (DIC) concentration were investigated. The greatest values of maximum biomass concentration (Xmax) and maximum specific growth rate (μmax) were obtained as 2.303 g L(-1) and 0.078 h(-1), respectively, at a light intensity of 120 μmol m(-2) s(-1) and DIC concentration of 17 mM. Based on the results, mathematical models describing the coupled effects of light intensity and DIC concentration on microalgae growth and CO2 biofixation are proposed. The models are able to predict the temporal evolution of C. vulgaris growth and CO2 biofixation rates from lag to stationary phases. Verification experiments confirmed that the model predictions agreed well with the experimental results.
authors: Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400030, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China.
authors: Hai-Xing
authors: HX
authors: Chang
authors: Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400030, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China. Electronic address: yunhuang@cqu.edu.cn.
authors: Yun
authors: Y
authors: Huang
authors: Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400030, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China.
authors: Qian
authors: Q
authors: Fu
authors: Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400030, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China.
authors: Qiang
authors: Q
authors: Liao
authors: Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400030, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China.
authors: Xun
authors: X
authors: Zhu
mesh_terms: D018533:Biomass; D002244:Carbon / Q000494:pharmacology*; D057486:Carbon Cycle / Q000187:drug effects* / Q000528:radiation effects; D002245:Carbon Dioxide / Q000378:metabolism*; D048408:Chlorella vulgaris / Q000187:drug effects / Q000254:growth & development* / Q000528:radiation effects; D007700:Kinetics; D008027:Light; D058086:Microalgae / Q000187:drug effects / Q000254:growth & development* / Q000528:radiation effects; D008962:Models, Theoretical; D058433:Photobioreactors / Q000382:microbiology; D015203:Reproducibility of Results; D012995:Solubility
chemical_list: D002245:Carbon Dioxide; D002244:Carbon
keywords: Carbon biofixation; Kinetics characteristics; Mathematic models; Microalgae