Which type of algae is known to cause filtration issues by clogging the filter bed?

The answer is diatoms, which are a type of algae that can cause significant filtration issues in water treatment processes. Diatoms possess a silica-based cell wall, which makes them particularly unique and complex compared to other types of algae. When they proliferate in water sources, they can accumulate in large quantities and create a thick, gelatinous mass, leading to clogging in the filter bed of treatment systems. This can make it difficult for water to pass through effectively, resulting in decreased filtration efficiency, increased backwashing frequency, and higher operational costs.

The other types of algae, while they can also be present in water systems, do not have the same impact on filtration as diatoms. Green algae may grow in various water sources but typically do not form the same obstructive masses. Blue-green algae, also known as cyanobacteria, can produce toxins and create issues in water quality, but they are less likely to cause physical clogging of filter beds. Red algae are generally not a common concern in freshwater systems and their impact on filtration is minimal compared to diatoms. Understanding the characteristics and behaviors of these different algae types is critical for effective water treatment and management.