What effect does a decrease in the uniformity coefficient have on filter media?

A decrease in the uniformity coefficient indicates that the size of the particles within the filter media is becoming more uniform, meaning there is less variation in particle size. A uniform media allows for more effective water flow and filtration because the gaps between particles are more consistent, which can enhance the filtration efficiency.

When the particle size distribution is narrow, the media can capture particles more effectively and create a more predictable flow path for the water through the filter. This reduces the likelihood of bypassing of particles and increases the overall efficiency of the filtration process.

In contrast, if the uniformity coefficient were to increase, it would imply a greater variation in particle sizes, which could lead to problems such as channeling and reduced filtration effectiveness. Therefore, a decrease in the uniformity coefficient leading to a more uniform media particle size is beneficial for effective filtration in drinking water treatment systems.