Cooling water treatment programs
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| C. MICROBIAL GROWTH: |
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Cooling
water gives the excellent conditions for
growth of various microorganisms. The temperature
and pH of circulating water are ideal conditions
for the growth of algae and various bacteria's.
Also the organic matter, inorganic salts, sunlight
etc. provides abundance of nutrients for the
growth of these microorganisms. Following are the
problems faced because of various microorganisms:
a) Algae: Air, water &
sunlight are the three basic requirements for
algae growth. Excessive growth of algae on the
deck of cooling tower can choke the distributor
nozzles and reduce the water flow through cooling
tower thus reducing its efficiency. Excessive
growth on the louvers, fill material increases the
load on structure and may cause the failure of
structure. Algae mass can also get carry into the
heat exchangers and plug the exchanger tubes.
b) Bacteria: There are various species of
bacteria found in
cooling water system.
SOME OF THE MOST FREQUENTLY FOUND BACTERIA IN COOLING SYSTEM
ARE:
I Pseudomonas: These are aerobic bacteria, which
secrete slime. This slime acts as a binding
material and fouls the System.
II Sulphate Reducing Bacteria: These are anaerobic
bacteria which reduces sulphate ions to sulphides.
These bacteria grow under the deposits and yields
under deposit corrosion.
There are also other aerobic bacteria like
nitrifying bacteria, which reduces the pH of
circulating water and iron bacteria and sulphur
oxidizing bacteria which hamper the efficiency of
the system.
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| HOW DO THE BIOCIDES WORK? |
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BIOCIDES are chemicals that interfere with basic life process of a cell.
BIOCIDES act as a poisonous material to the Algae cells. They will either rupture the cell wall or get into the cell and damage the metabolism inside the cell.
We have extremely strong BIOCIDES, which would kill Algae in few days of time. Regular dosage of BIOCIDES will not allow Algae to grow, once destroyed. Killing of Algae is the visible sign of the action of BIOCIDES as the dead Algae will turn from Green to Yellowish-brown. |
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However, if initial growth of Algae is very high, it will be desirable to clean the Algae manually as much as possible. Otherwise, there is a chance of dead Algae becoming a large mass of foulants in the water and chocking the strainers in the pipelines.
The problems associated with the use of water in cooling systems are serious but carefully prescribed and monitored "Total Cooling Water Treatment" program can curtail their occurrence. The damage will begin immediately. Equipment designed to last for years can break down in just days due to some form of uncontrolled corrosion scale, microbial growth or fouling. These problems are control by "Total Cooling water Treatment" program, which will include both chemical and mechanical methods for controlling problems.
For example, depending on the design and location and water Chemistry, water treatment program may include some or all of the following:
1) Corrosion Inhibitor
2) Dispersant
3) Biocide
4) Scale Inhibitor
Through the implementation and proper monitoring of these specialized total water treatments program, the problems associated with water in cooling systems can be controlled.
To make our program success, we incorporate monitoring tools to ensure that Treatment program of the system is become more effective every passing day |
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