Abstract
Relationship between maximum yield and specific growth rate for algae with a growth inhibitory batch test was investigated. Inhibitory effect of wastewater from coke furnace on growth of two species of freshwater algae Selenastrum capricornutum, Microcystis aeruginosa and seawater algae Skeletonema costatum was observed.
The EC50 values estimated from specific growth rate were approximately 5 percent (wastewater mixed medium ratio) for S. costatum, 28 percent for M. aeruginosa and 45 percent for S. capricornutum However, the EC50 values estimated from maximum yield were 8 percent for S. costatum, 10 percent for M. aeruginosa and 18 percent for, S. capricornutum.
Increase in wastewater mixed medium ratio caused decrease of the specific growth rate and maximum yield. There is no common relationship between the specific growth rate and maximum yield for the three spieces.
