Open AccessCultivation of microalgae in fluidized bed bioreactor: impacts of light intensity and CO2 concentration
Author(s) -
Siti-Suhailah Rosli,
Jun-Wei Lim,
Man Kee Lam,
YeekChia Ho,
Yin Fong Yeong,
Hayyiratul Fatimah Mohd Zaid,
Thiam Leng Chew,
Z. M. Aljunid Merican,
Mardawani Mohamad
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/736/2/022018
Subject(s) - fluidized bed , bioreactor , biomass (ecology) , light intensity , pulp and paper industry , environmental science , intensity (physics) , materials science , process engineering , chemistry , biology , ecology , engineering , physics , organic chemistry , quantum mechanics , optics
Harvesting of suspended microalgae biomass will generally incur excessive time and intensive energy due to low biomass density. Microalgae cultivation via fluidized bed bioreactor was introduced to tackle the harvesting process in which the support material was fluidizing within the culture medium, allowing the microalgae to settle onto the surface of fluidized material and grow thereafter. The Central Composite Design (CCD) was adopted to design the experiments for optimization of attached microalgae growth onto the fluidized bioreactor. The optimization condition occurred at 216 μmol/m 2 s light intensity and 9% CO 2 concentration with maximum biomass concentration (X max ) and maximum specific growth rate μ max ) of attached microalgae obtained at 0.692 g/L and 0.028 1/h, respectively. The Verhulst logistic kinetic model illustrated the attached microalgae growth from lag to stationary phase, supporting the use of this model to represent the kinetic of attached microalgae growth onto the fluidized bed bioreactor under various condition.