title: Comparison of Chlorella vulgaris biomass productivity cultivated in biofilm and suspension from the aspect of light transmission and microalgae affinity to carbon dioxide.
abstract: To investigate light transmission and cells affinity to CO2, Chlorellavulgaris was attached to microfiltration membrane that laid on the solidified BG11 medium compared to that in suspended cultivation mode in this study. The results showed that C. vulgaris showed a 30.4% higher biomass production (103gm-2) in attached than in suspend system. The upper layer of biofilm with a thickness of 41.31μm (the corresponding areal density of 40gm-2) was effectively illuminated under light intensity of 120μmolm-2s-1and more than 40% of the microalgal cells were in light even the areal density was high to 100gm-2. While only 2.5% of the cells were effectively illuminated in the suspended cultivation system. Furthermore, microalgae cells in biofilm showed a higher affinity to CO2compared with that in suspension, and CO2saturation point of microalgae cells in biofilm was 1.5% but 4.5% in suspension.
authors.affiliation: Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Huang
authors.affiliation: Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Xiong
authors.affiliation: Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China. Electronic address: lqzx@cqu.edu.cn.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liao
authors.affiliation: Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Fu
authors.affiliation: Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China.
authors.forename: Ao
authors.initials: A
authors.lastname: Xia
authors.affiliation: Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China.
authors.forename: Xun
authors.initials: X
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China.
authors.forename: Yahui
authors.initials: Y
authors.lastname: Sun
mesh_terms: D018441:Biofilms; D018533:Biomass; D002245:Carbon Dioxide / Q000378:metabolism; D018929:Cell Culture Techniques / Q000379:methods*; D048408:Chlorella vulgaris / Q000166:cytology / Q000254:growth & development* / Q000378:metabolism*; D008027:Light; D058086:Microalgae / Q000166:cytology / Q000254:growth & development / Q000378:metabolism*; D013535:Suspensions
chemical_list: D013535:Suspensions; D002245:Carbon Dioxide
keywords: Affinity to CO(2); Attached cultivation; Biofilm; Light penetration; Microalgae