August 29, 2023
Algae can grow in cooling towers where there is an opening for sunlight to reach the water. This opening also allows algae to get into the tower. Algae spores can be carried by wind, rain, or contaminated objects. These spores grow into algae.
Why is Algae Harmful?
Algae can vary on how harmful it is. Usually, the more algae there is the more of a problem it can cause. Here are some common problems caused by algae.
It Causes Microorganism Growth
Algae in water can cause microorganism growth. When it dies it breaks down and releases nutrients into the water for bacteria to feed on. One of the types of bacteria to worry about is Legionella, a deadly disease-causing bacteria that cooling towers are susceptible to spreading. It also may provide a shield to bacteria against the elements and promote the formation of biofilm. Algae biofilm is a slimy group of bacteria that attaches to algae. It can be more resilient than normal bacteria. Algae biofilm also accelerates corrosion of the metal surfaces of the cooling tower.
For algae and other cooling tower or water treatment problems, reach out to us here for professional help.
Lowers Heat Transfer Efficiency
Heat transfer is the function of a cooling tower and large amounts of algae will lower the efficiency of that. Contaminants in a heat exchanger do not allow the metal surface to utilize its properties conducive to exchanging heat.
Clogging
Algae can clog the tower. There are many parts of a cooling tower that are especially susceptible to clogging. Along with the heat exchanger, the fill, intake, strainer, and water line are at risk. Algae can grow in water lines and pipes if they are clear. Otherwise, dead algae will only get into dark areas of the system and cause clogging.
Algae Preventative Maintenance
If there is algae in your cooling tower it is first recommended to thoroughly clean it. Another recommendation is to inspect the system for potential damage if it has not been under a maintenance program. Corrosion and other problems that algae may have caused need to be addressed. The long-term solution is to conduct regular maintenance to prevent algae from growing in the water.
Biocides
Biocides can rapidly kill algae and will drastically reduce the chances of it growing. There are various types of biocides such as oxidizing and non-oxidizing that can be useful for preventing algae. Additionally, they will help prevent other harmful microbiological growth such as Legionella.
There are many types of biocides and choosing the right one and implementing a regular program for it is important. Have the professionals at Chardon Laboratories inspect your system and set up a solution that works for you by contacting us here.
Matt Welsh
Matt Welsh is the Vice President and Water Consultant at Chardon Labs. He helps consult a wide range of customers utilizing various methods of water treatment, from chemical to chemical-free approaches, large and small applications, and across a wide range of geographical influences. With 20 years of water treatment experience, including a wide range of troubleshooting and service in potable water and non-potable HVAC and industrial applications, he is an expert in water treatment chemistry for cooling towers, boilers, and closed-loop systems.