Effects of light regime on eztracellular polysaccharide production by Porphyridium cruentum cultured in flat plate photobioreactors
Light quality was a key factor for controlling the growth and polysaccharide production of microalgae. Growth and extracellular polysaccharide production by Porphyridium cruentum cultured in flat plate bioreactors were measured as a function of light wavelength and intensity. The growth rate and polysaccharide production of Porphyridium cruentum increased with enhanced of light intensity, however a light level beyond the saturation point inhibited the growth of microalgae. Here, Photon flux density of 80μE m-2s-1 was the optimal light level for maximum biomass and polysaccharide production by Porphyridium cruentum. Continuous light radiation enhanced the growth rate, but the maximum polysaccharide production was obtained at the light-dark cycle of 18:6. It was found no significant difference in cell growth between different spectrums. Green light, natural light and yellow light were found more suitable for increasing polysaccharide production than blue light and red light.
Light regime Growth rate ezopolysaccharide Porphyridium cruentum Flat-plate photobioreactor
Sun Liqin Wang Changhai ShiLei
Microalga Biotechnology Lab, Dalian University of Technology, Dalian Liaoning, China 116024 Ocean Sc Ocean School of Yantai University, Shandong Yantai China, 264005
国际会议
上海
英文
1488-1491
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）