caa a22 4500 475783646 CHVBK 20180406123651.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1023/A:1008110819338 doi (NATIONALLICENCE)springer-10.1023/A:1008110819338 Scale-up of tubular photobioreactors [Elektronische Daten] [E. Molina, F.G. Acién Fernández, F. García Camacho, F. Camacho Rubio, Y. Chisti] The effect of the light/dark cycle frequency on theproductivity of algal culture at differentday-averaged irradiance conditions was evaluated forPhaeodactylum tricornutum grown in outdoortubular photobioreactors. The photobioreactor scale-upproblem was analyzed by establishing the frequency oflight-dark cycling of cells and ensuring that thecycle frequency remained unchanged on scale-up. Thehydrodynamics and geometry related factors wereidentified for assuring an unchanged light/dark cycle.The light/dark cycle time in two different tubularphotobioreactors was shown to be identical when thelinear culture velocity in the large scale device(U LL) and that in the small scale unit (>U LS)were related as follows:ULL = \frac f 9/7 \alpha8/7 ULS.Here f is the scale factor (i.e., the ratio oflarge-to-small tube diameters), α is afunction of the illuminated volumes in the tworeactors, and 'sdark' refers to any zone of the reactorwhere the light intensity is less than the saturationvalue. The above equation was tested in continuouscultures of P. tricornutum in reactors with 0.03 mand 0.06 m diameter tubes, and over the workableculture velocity range of 0.23 to 0.50 m s-1. Thepredicted maximum realistic photobioreactor tubediameter was about 0.10 m for assuring a cultureperformance identical to that in reactors with smaller tubes. Kluwer Academic Publishers, 2000 light/dark cycles nationallicence microalgae nationallicence Phaeodactylum tricornutum nationallicence photobioreactors, scale-up nationallicence Molina E. Department of Chemical Engineering, University of Almería, E-04071, Almería, Spain aut Acién Fernández F.G. Department of Chemical Engineering, University of Almería, E-04071, Almería, Spain aut García Camacho F. Department of Chemical Engineering, University of Almería, E-04071, Almería, Spain aut Camacho Rubio F. Department of Chemical Engineering, University of Granada, E-18071, Granada, Spain aut Chisti Y. Department of Chemical Engineering, University of Almería, E-04071, Almería, Spain aut Journal of Applied Phycology Kluwer Academic Publishers 12/3-5(2000-10-01), 355-368 0921-8971 12:3-5<355 2000 12 10811 https://doi.org/10.1023/A:1008110819338 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1008110819338 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Molina E. Department of Chemical Engineering, University of Almería, E-04071, Almería, Spain aut NATIONALLICENCE 700 1- Acién Fernández F.G. Department of Chemical Engineering, University of Almería, E-04071, Almería, Spain aut NATIONALLICENCE 700 1- García Camacho F. Department of Chemical Engineering, University of Almería, E-04071, Almería, Spain aut NATIONALLICENCE 700 1- Camacho Rubio F. Department of Chemical Engineering, University of Granada, E-18071, Granada, Spain aut NATIONALLICENCE 700 1- Chisti Y. Department of Chemical Engineering, University of Almería, E-04071, Almería, Spain aut NATIONALLICENCE 773 0- Journal of Applied Phycology Kluwer Academic Publishers 12/3-5(2000-10-01), 355-368 0921-8971 12:3-5<355 2000 12 10811 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer