What temporary solution can help control filamentous bulking in activated sludge?

The addition of chlorine to the mixed liquor is an effective temporary solution for controlling filamentous bulking in activated sludge systems. Filamentous bulking occurs when filamentous bacteria proliferate, leading to poor settling and operational challenges in the treatment process. Chlorine acts as a disinfectant and can help reduce the number of filamentous organisms, thereby mitigating the effects of bulking.

While chlorine improves settling by reducing the biomass and controlling undesirable microorganisms, it is important to use it judiciously since excessive disinfection can harm beneficial bacteria in the treatment process. Chlorination offers a quick fix while other long-term operational parameters are fine-tuned to manage conditions that allow filamentous organisms to thrive.