For conventional filtration, what is the recommended minimum detention time?

The recommended minimum detention time for conventional filtration is 30 minutes. This duration ensures that water has sufficient contact time with the filter media, allowing for effective removal of particulate matter and microorganisms from the water being treated. During this time, particles can be captured, and the overall quality of the water improves. Adequate detention time is crucial because insufficient time may not allow for the complete sedimentation or filtration processes to occur effectively, potentially leading to inadequate treatment of the water.

Longer detention times, while they might seem beneficial, do not necessarily improve filtration efficacy beyond a certain point and can lead to operational inefficiencies in treatment facilities. Therefore, 30 minutes strikes a balance between effectiveness and operational practicality in conventional filtration systems.