Vortisand industrial sand filters

Sonitec has developed and marketed unique industrial sand filters for polishing potable, process and wastewater.

VORTISAND®

• is a high performance automatic backwashable industrial sand filters that ingeniously combines centrifugal separation and sand filtration in the same vessel
  
• achieves very fine filtration (down to 0.45 micron) at high rate, using 80 to 90% less water for backwashing compared to traditional industrial sand filters
  
• provides a filtration 10 to 20 times finer than traditional industrial sand filters
  
• continuous filtering removes suspended solids
  
• provides clean, clear water when used in conjunction with chemical treatment programs that chemical treatment alone cannot guarantee
  
• is also very effective as a pretreatment for RO, DI systems
  

Industrial Sand Filters - more info

How does it work ?

VORTISAND® uses a tangential inlet to introduce water with a swirling action. Centrifugal force helps to remove the suspended solids and significantly increases the effective filtration surface within the tank. This creates a concave surface on the sand media and increases the total filtration surface area.

This turbulence produces a sustained cleaning action that forces the suspended solids to accumulate on the inside walls of the tank. The water, now largely free of impurities, is then filtered through the media and subsequently collected.

Water passes through the filtration media to the under drain at the bottom the vessel, allowing the top layer media to capture the contaminants. The purpose of putting the top layer in motion is to use the compacted fine filtration media as a barrier for the ultra fine particles, so that the particles are filtered out at the surface and not deeply like conventional filters.

Contaminants trapped above are removed using an automatic backwash cycle which requires much less water and a shorter operating time than traditional industrial sand filters. This process contributes to longer cycles and much finer filtration levels.

When a preset pressure differential is reached, a backwash cycle is initiated to reverse the flow through the vessel and discharge contaminants to waste line.