Bacteria are measured in water to control heat transfer surface fouling, prevent corrosion, and prevent human pathogens. The bacteria potentially found in cooling water systems are:
- E. Coli
- Aerobic slime formers
- Sulfate reducers
- Iron bacteria
- Gram positive pathogens
Legionella is responsible for Legionnaires Disease. Legionnaires disease is a potentially fatal pneumonia caused most commonly by Legionella pneumophila, a gram negative, aerobic bacteria that is carried by amoeba that thrive in stagnant water..
Aerobic slime formers are the primary bacteria in cooling water systems. Aerobic slime formers a covered with a polysaccharide coating that causes them to stick together and to most other type of surfaces.
Enteric bacteria is from the intestine of birds or animals.
Heterotrophic utilize organic compounds both as a carbon source and an energy source. Their presence indicates there are carbohydrates, fats or proteins to serve as a source of food.
Anaerobic organism is any organism that does not require oxygen for growth. It may react negatively or even die if oxygen is present, which means that it can perform its bodily functions better in the absence of oxygen. Typical anaerobic bacteria are sulfate reducers and iron bacteria.
Sulfate reducers obtain energy by oxidizing organic compounds or molecular hydrogen (H2) while reducing sulfate (SO2) to hydrogen sulfide (H2S). Sulfate reducing bacteria breathe sulfate rather than oxygen.
Fungi include yeast and molds.
Bacterium may be controlled or removed from water by:
- Oxidizing biocides
- Non-oxidizing biocides
- Biological dispersants
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