1994 Volume 31 Pages 337-346
Characteristics on statistical distributions of coliform group density and enterococcus group density were investigated in an aquatic environment. Statistical distributions of both baterial group densities were influenced by the water quality such as suspended solids concentration and so on. The statistical distribution of coliform group density was more sensitive for the water quality than that of enterococcus group density.
In experiments employing the kaolin as the suspended solids, the increase of the kaolin concentration brought decreases of both bacterial group densities, and the degree of decrease of bacterial density was more remarkable in case of coliform group. That is, the presence of kaolin floc in the water sample influences the statistical distribution of coliform group more significantly compared with enterococcus group.
Therefore, results of this study derived that enterococcus group would be much better indicator bacteria than coliform group in the aquatic environment where the suspended solids was involved.
