AQSEPTENCE GROUP
Johnson Screens® Triton™ Underdrains
Application as reliable and efficient underdrains system in gravity filters in order to retain the granular filter media in place and also to optimize the collection of filtered effluent and distribution of air & water during backwash mode
- The TRITON® Underdrains system is made of Vee-Wire® filtering media support profiles that offer fine slots to suit the selected filter media specifications and U-shaped perforated supports to allow flow control for both air and water.
- The TRITON™ scalloped-shaped elements collect the filtered effluent and discharge it into a common flume, which in turn, routes the water out of the filter.
- During backwash mode, the flow is reversed and air & water enter the flume and are directed into the underdrain.
- Conventional systems require an intermediate layer of gravel between the treatment media and the underdrains. Vigorous backwashing can cause bed upset, reducing the hydraulic efficiency of the bed and allowing some media to migrate past the filter underdrain.
- TRITON™ Underdrains systems retain the media directly, eliminating gravel as a potential problem.
- TRITON™ Vee-Wire® media support surface has a larger open area, which provides plug-free and low headloss performance. The perforated slots of the louvered folded plate or block types with their centered plastic top underdrain systems do not provide the same area.
- Improved backwash effectiveness
- Longer filter runs
- Increased Filter Capacity, Lower Power Consumption
- Smooth, robust and plug-free retention surface
- Cut major downtime costs
- Adapt to any filter design
- Filter bed upsets eliminated
- Installation faster and easier
- Lower energy costs due to reduced headloss and backwash power consumption
- Longer filter runs due better cleaning of filter media
- Better water recovery due to less backwash water required
- Lower life cycle costs due to the cumulative effect of all of the above
- Ease of installation compared to other underdrain designs
- No grouting
- No special tools or handling
- Proven design that delivers operational benefits for clients
- Ease of installation for contractors
- Computer modeling and process optimization based on computation fluid dynamics to insure installation operates as designed
- Process optimization after installation based on computation fluid dynamics analysis throughout the design process
- Drinking water
- Wastewater applications (tertiary filtration)
- Industrial pre-treatment or desalination applications
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