What is the difference between sand filter, microfiltration and ultrafiltration?

The main objective of the filtration is to remove or separate the suspended solids (SS) present in water, passing it through a filtering porous material. Ultimately they all do the same job but remove different elements depending on the suspended solids diameter in water. The size of particles that can be removed during filtration depends upon the size of the pores of the filter.

The water to be purified slowly sinks through the sand of the sand filter, leaving the dirt particles from the water behind in the fine pores of the sand. Sand filters with a 10 micron rating can remove some unseen materials from liquid but not bacteria or viruses.

An ultrafiltration filter has a pore size around 0.01 μm. A microfiltration filter has a pore size around 0.1 μm, so when water undergoes microfiltration, many microorganisms are removed, but viruses remain in the water. Ultrafiltration would remove these larger particles, and may remove viruses. The ultrafiltration process reduce the turbidity to less than 1 NTU, which is perfectly suitable for next treatment steps.

Each water issue is treated separately and a bespoke system is designed and built to reach the quality of water you want to achieve for your process.

A combination of more than one system is common to achieve such a precise quality of the water where regulations are tighter.

Waterland always offers you the most suitable systems through its qualified engineers with the best price.