Volume 9 Issue 2
Mar.  2019
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Article Navigation >  Journal of Environmental Engineering Technology  > 2019  >  9(2): 175-180
LIU Jianjian, ZHAO Bingtao, SU Yaxin. Modeling of specific growth rate factors of microalgae based on constructional function method and its carbon emission reduction potential[J]. Journal of Environmental Engineering Technology, 2019, 9(2): 175-180. doi: 10.12153/j.issn.1674-991X.2018.11.260
Citation: LIU Jianjian, ZHAO Bingtao, SU Yaxin. Modeling of specific growth rate factors of microalgae based on constructional function method and its carbon emission reduction potential[J]. Journal of Environmental Engineering Technology, 2019, 9(2): 175-180. doi: 10.12153/j.issn.1674-991X.2018.11.260
shu

Modeling of specific growth rate factors of microalgae based on constructional function method and its carbon emission reduction potential

doi: 10.12153/j.issn.1674-991X.2018.11.260

  • 1.School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

  • 2.School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China

  • Received Date: 2018-08-22
  • Publish Date: 2019-03-20
    Abstract
  • Three key influencing factors of specific growth rate of microalgae, i.e. CO2 concentration, light intensity and nitrogen concentration were chosen, and ten kinds of univariate non-linear models used to construct a multivariate non-linear model between the three factors and the specific growth rate of microalgae by constructional function method. After the correlation parameter test of the significance P value less than 0.05 and the collinear diagnosis of VIF less than 5, the final determination coefficient (R2) of the multivariate nonlinear regression equation was 0.917, which could be used for the effective prediction of the growth rate of microalgae. On this basis, through the analysis of the effect of the equation on the three factors, it was concluded that when CO2 concentration was 5%-15%, the specific growth rate of microalgae was high, and the specific growth rate gradually increased with the increase of light intensity (45-480 μmol/(m2 ·s)) and nitrogen concentration (0-700 mg/L). The biomass yield of microalgae was predicted to be 7.2-100.2 kg/(m3 ·a) by regression model, and the absorption and fixation of CO2 by microalgae was estimated to be 7.92-183.70 kg/(m3·a).

     

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