What might cause thick billows of white sudsy foam in the aeration tank?

Thick billows of white sudsy foam in the aeration tank are often caused by a phenomenon related to the presence of excessive nutrients, particularly organic matter or surfactants, which can lead to increased biological activity and foaming. When nutrient levels such as nitrogen and phosphorus are high, they can support the growth of microorganisms that produce excess foam.

In this scenario, excessive nutrients act as a catalyst for the excessive growth of specific types of microorganisms that thrive in nutrient-rich environments, leading to foam generation. This foam can also be exacerbated by the aeration process itself, which introduces air into the tank, causing bubbles to form and become trapped in the mixture of microorganisms.

Maintaining appropriate nutrient levels is crucial in wastewater treatment processes. Monitoring and managing the influent quality to prevent nutrient overload is essential for controlling foam formation. Recognizing the relationship between nutrient balance and foam growth helps operators address issues effectively and maintain optimal treatment conditions.