title: Influence of cell properties on rheological characterization of microalgae suspensions.
abstract: The influences of algal cell size and surface charge on rheological properties of microalgae suspensions were investigated. The effective viscosity of two microalgae suspensions, i.e., the freshwater Chlorella sp. and the marine Chlorella sp., was measured as a function of their volume fractions in the range of 0.70-4.31%. The hydrodynamic diameters of the freshwater Chlorella sp. and the marine Chlorella sp. were measured to be 3.13 and 6.00 μm, respectively. The Zeta potentials of these two algal cells were measured to be -23.73 and -81.81 mV, respectively. The intrinsic viscosities of these two microalgae suspensions were further determined to be 24.7 and 16.1, respectively. Combining with theoretical models, these results indicated that the algal cell size has a predominant effect over cell surface charge in affecting rheological properties of microalgae suspensions. Smaller algal cells result in a higher effective viscosity of the microalgae suspension.
authors.affiliation: School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China.
authors.forename: Xinru
authors.initials: X
authors.lastname: Zhang
authors.forename: Zeyi
authors.initials: Z
authors.lastname: Jiang
authors.forename: Liang
authors.initials: L
authors.lastname: Chen
authors.forename: Aihui
authors.initials: A
authors.lastname: Chou
authors.forename: Hai
authors.initials: H
authors.lastname: Yan
authors.forename: Yi Y
authors.initials: YY
authors.lastname: Zuo
authors.forename: Xinxin
authors.initials: X
authors.lastname: Zhang
mesh_terms: D000042:Absorption; D048429:Cell Size; D002708:Chlorella / Q000166:cytology* / Q000502:physiology*; D005618:Fresh Water / Q000382:microbiology; D057446:Hydrodynamics; D058086:Microalgae / Q000166:cytology* / Q000502:physiology*; D010316:Particle Size; D012212:Rheology; D012623:Seawater / Q000382:microbiology; D013057:Spectrum Analysis; D013535:Suspensions; D014783:Viscosity
chemical_list: D013535:Suspensions