Analysis of variation of algae and organic matter in raw water transformation using 3-D fluorescence spectroscopy

A kind of new technique, 3-D fluorescence spectroscopy (TDFS), is used to analyse the phytoplankton of Shenzhen Dongjiang water source project. It is found that there are abundant algaes in the water through all the pipe line. The chlorophyll-a concentration is between 1.71 and 16.43 μg/L, and the algae biomass vangs from 72.92 to 1 375 × 104/L. TDFS can basically identify the species and quantity of algaes in water. There is distinct interconversion between fluorescence intension with chlorophyll-a concentration and the algal biomass. Furthermore, different kinds of dissolved organic matters and their concentration can be identified with TDFS method.