At the head of the list are slime-forming aerobic bacteria. The most common of these is pseudomonas. When organism other than those shown on the standard analytical form are found, these are noted in the appropriate location. For example, e-coli found are reported as aerobic, nonsporeforming bacteria ; the sulfur producing bacteria, beggiatoa, is reported under the column for “other bacteria” when it is identified. Organisms other than bacteria, fungi, and algae include the protozoa and rotifiers that are often found grazing on the floc containing the other microorganisms. Actinomyces are sometimes identified by special techniques, as these can contribute significantly to tastes and odor in finished water.
March 24, 2011