Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2008.763.771Heamatococcus pluvialis]]>AkpolatO. EristurkS. 5200885The aim of this study is to optimize the physical parameters
affecting the production of Heamatococcus pluvialis in photobioreactors
and to simulate the process. Heamatococcus pluvialis is a green
microalgea to have a great interest for production of natural astaxanthin
and it can be cultivated in a closed photobioreactor system under controlled
conditions. Biomass composition, growth rate and high value product spectra
like polyunsaturated fatty acids, pigments, polysaccharides or vitamins
depend on strongly the parameters of cultivation process. These are composition
of cultivation medium, mixing model and aeration rate, hydrodynamic stress
of medium which can be changed by adding some chemicals, cultivation temperature,
pH, carbon dioxide and oxygen supply and most important of all: illumination.
One of the most important problems during the cultivation is that cells
have sensitivity to shear stress very much and the shear stress created
by aeration and mixing effects the growth rate of the cell negatively
and decreases yield. In this study, physical parameters such as; the rate
of the air fed into the reactor, the mixing type, the reduction of the
hydrodynamic stress by CMC addition, the effect of the cell size on the
cell production and the flocculation speed of the culture, were investigated.]]>Barbosa, M., J. Hadiyanto and R.H. Wijffels,2003857885Barbosa, M.J., M. Albrecht and R.H. Wijffels,200383112120Becker, E.W.,1994Pages: 293Pages: 293Boussiba, S.,2000Heamatococcus pluvialis Cellular physiology and stress response.]]>108111117Bronnenmeier, R. and H. Markl,198124553578Camacho, F.G., E.M. Grima, A.S. Miron, V.G. Pascual and M.Y. Chisti,200129602610Chisti, Y.,200018430432Chou, D.K., R. Krishnamurthy, T.W. Randolph, J.F. Carpenter and M.C. Manning,20059413681381Contreras, A., F. Garcia, E. Molina and J.C. Merchuk,19982 mass transfer, light availability and hydrodynamic stress in the growth of Phaeodactyylum tricornutum in a concentric tube airlift photobioreactor.]]>60317325Contreras, A., F. García, E. Molinaa and J.C. Merchuk,200125820830Csogor, Z., M. Herrenbauer, I. Perner, K. Schmidt and C. Posten,199938517523De Swaaf, M.E., G.J. Grobben and G. Eggink,2001Crypthecodinium cohnii.]]>57395400Elgozali, A., V. Linek, M. Fialova, A. Wein and J. Zahradn,20025729872994Eriturk, S. and O. Akpolat,2005Heamatococcus pluvialis in the photobioreactors.]]>2005Fox, R.,19961996Gudin, C. and D. Chaumont,19831983pp: 184193Keane, J.T., D. Ryan and P.P. Gray,200281211220Lawlor, S.M. and N.M. O'Brien,19951516951704Mardikar, S.H. and K. Niranjan,200068697704Martens, D.,20052005Merchuk, J.C. and X.X. Wu,20015635273538Miki, W.,199163141146Miron, A.S., M.C. Garcia, A.C. Gomez, F.G. Camacho, E.M. Grima and Y. Chisti,2003Phaeodactyylum tricornutum in quasi steady-state continuous culture in outdoor photobioreactors.]]>16287297Molina, E., J. Fernandez, F.G. Acien and Y. Chisti,200192113131Palozza, P. and N.I. Krinsky,1992297291295Seely, G.R., M.J. Duncan and W.E. Widaver,197212184188Silva, H.J., T. Cortinas and R.J. Ertola,1987Dunaliella growth.]]>404149Sukan, S.S., A. Guray and F. Vardar-Sukan,198846179187Sukatar, A.,2002pp: 184-168pp: 184-168Suzuki, T., T. Matsuo, K. Ohtaguchi and K. Koide,19952 fixation by Dunaliella tertiolecta.]]>624351358Terao, J.,198924659662Wu, J.,1995438194