Microbicide

Cooling water microorganisms are generally divided into three categories: bacteria, fungi, and algae.
In this subtropical climate, where both temperature and humidity are relatively high, the temperature and pH of cooling water often fall within the range suitable for microbial growth. Moreover, the water frequently contains sufficient nutrients, organic matter, inorganic salts, and sunlight. In open circulation systems, contamination from processes leads to higher concentrations, resulting in even faster microbial growth.

Microorganisms, together with dust and pollutants entering the water, generate slime and deposits, which accumulate inside cooling towers, fillers, or at spray nozzles. This affects water droplet size and cooling water distribution, lowering the cooling tower’s efficiency. If slime falls into the water, it can clog cooling water filters and pipelines. Smaller particles increase water turbidity, and over time, slime deposits form inside heat exchangers, reducing heat transfer efficiency.

Deposits formed by microorganisms can cause wood decay and metal pipe corrosion. Beneath slime layers, oxygen concentration cells may also develop, leading to severe localized corrosion.