What is the recommended detention time for flash mixers?

The recommended detention time for flash mixers is typically between 1 to 3 minutes. This duration allows for effective mixing of chemicals with the water to achieve the desired chemical reactions, such as coagulation. Flash mixers are designed to rapidly mix chemicals and ensure a uniform distribution throughout the water.

A shorter detention time, like 0-1 minutes, would likely not provide sufficient opportunity for complete mixing and could result in ineffective treatment processes. On the other hand, longer detention times, such as 4-6 minutes or 7-10 minutes, may lead to the potential for sedimentation and could decrease the efficiency of the treatment process. Thus, adhering to the 1-3 minute guideline helps operators ensure that the mixture is adequately conditioned for subsequent treatment stages.