Algae are primitive plants that have no true leaves, stems or root systems and reproduce by means of spores, cell division or fragmentation. About 17500 species of algae have been identified and there are probably many more. The four major groups of algae of interest in water treatment are blue green algae, green algae, diatoms and pigmented flagellates.

Heavy concentrations of algae may cause the following operational problems in a water system:

- Taste, odor and color

- Toxicity

- Filter clogging

- Interference with Other Water Treatment Steps

- Slime accumulation

- Corrosion of Structures

- Formation of THM's

Below are the scientific names of various species of algae that cause problems in water treatment systems




Compiled by Rami E. Kremesti M.Sc.

Reference: Water Treatment - Principles and Practices of Water Supply Operations - 3rd Edition - AWWA