(Fig. 4b). The phycoerythrin and phycocyanin that causes this color in the samples were bleached by the photo-catalytic reaction. In experiments using ultraviolet light alone without the TiO2 catalyst (data not shown), we found culture cell numbers decreased rapidly. However, no oxidation of the organic material in the effluent occurred. These results suggested that photo-catalytic is possible to sanitize industrial bio-effluent.
In this study, disappearance of the whole cells with the reactor was not observed under microscope. However
the outline of most cells was blurred at 30 min after TiO2 reaction (data not shown). Cells might disappear
by more reaction.