Biological Organisms
Another cause corrosion of biological organisms. These algae, slime and mold. Sludge flourish in the complete absence of light. Some cling sludge pipes and will digest iron. This local attack leads to the formation of small pits, who, for a certain period of time, will expand to form the holes.
Other slimes live on mineral impurities, especially sulphates in the water. They emit hydro-gen-sulphur dioxide. Gas forms a weak hydrosulphuric acid. (Not to be confused with sulphuric acid.) This acid is slowly but steadily growing worse, pipelines and other metal parts of the system. Tina and algae produce oxygen in the water. Little bubbles of oxygen, forms and cling to the pipe. This oxygen can act in the same way as dissimilar metals and lead to corrosion galvanic action. This type of corrosion is usually called the oxygen corrosion cells.
Algae are a very primitive form of plant life. They are found almost everywhere in the world. Giant Pacific kelp, seaweed. Pond scum and green matter that grows in cooling towers also seaweed.
Live algae range in color from yellow, red, and green to brown and gray. Like bacterial slime, they need a wet or humid environments and prefer temperature from 40 to 80 degrees f (4 and 27 degrees). Given these conditions, they will find mineral nutrition for the growth of almost any water supply.
Bacteria cause mucus. Mucus, bacteria can grow and multiply at temperatures below freezing (32 degrees Fahrenheit [0 degrees C]), to the temperature of boiling water (212 degrees Fahrenheit [100 degrees C]). However, they prefer temperature from 40 to 80 degrees f (4 and 27 degrees). They usually grow in dark places. Some types of mucus are also on the rise under the influence of the light cooling towers. The exposition of the dark-growing organisms to daylight not necessarily stop them from growing. The only condition necessary for the goo distribution wet or humid environments.
Mushrooms-third of biological forms of corrosion. Mushrooms attack and destroy the cellulose fibres of wood. They cause what is known as brown rot or white rot. If fungal decay uncontrolled, serious structural damage that may occur in the tower.
It is important that the cooling system is stored biological growths, as well as scale. Fortunately, there are several effective chemicals to control algae and slime. Modern algaecides and slimeicides are divided into three main groups: chlorinated phenols (penta-chloro-phenates), Quaternary ammonium compounds, and various ORGANOMETALLIC compounds.
A wide range of mud and algae control agents required to meet the different conditions that exist in with water cooling equipment. The choice of the product depends on the following:
- Biological organism currently
- The extent of the infestation
- Resistance of the existing growths chemical processing
- Type and location of the equipment to be treated
There is considerable difference of opinion in the trade as to how often algaecide should be added or "bullet" or continuous feeding is the best method. In the treatment of severe biological growths, remember that when these organisms die, they break out and circulate in the system. Large mass can easily block screens, filters, and capacitor the tube. Some provisions should be made to prevent them from blocking the internal parts of the system. The best way to do this is to remove the thick, heavy growths before adding treatment. The day after the end of treatment, carefully drain and flush the system and clear all filters.
One of the most important areas of concern for the fairness of bacteria. The most complex problem is standing water. The system of pipelines should not be "dead ends" and tower flow must be maintained. When the dirt accumulates in the collection basin of the tower, it provides the right combination of deliveries to create bacteria Legionella:
- moisture
- oxygen
- warm water
- food
These bacteria can be found in water, consumables, and near rivers and/or threads. They are contained in droplets of water and may be in the air. Humans are susceptible to him from breathing polluted air. No chemicals can positively to eliminate all bacteria from the water supply into the cooling tower. However, there is evidence that proper maintenance along with the complex therapy can significantly minimize the risk of...
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