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Ecosol - Sand Filter
Sand Filters are typically used in water-sensitive urban design (WSUD) as a component of a treatment train to remove pollution conveyed in stormwater runoff before discharge to receiving waterways or to underground storage for collection and reuse. Sand filters operate in a similar manner to Bio-retention systems, with treated stormwater percolating downwards through a filter media and then being intercepted by perforated pipes located at the base of the media for conveyance downstream. Prior to entering the filter media (typically sand), flows must be subjected to pre-treatment to remove litter, debris and coarse sediment. This is typically achieved via an ‘inlet chamber fitted with a primary treatment litter basket as part of the system.
Although not commonly used today they still do have their application where site conditions, such as space limitations, or drainage grades, limit the use of bio-retention systems.
The range of Ecosol Sand Filters is able to be custom built to suit most applications and can be easily retrofitted into existing drainage networks. Ecosol Sand Filters are designed to remove and retain gross pollutants, sediment, free oils (hydrocarbons) and other attached particulate pollutants such as Nitrogen, Phosphorous and heavy metals present in stormwater runoff. The system is unique as it provides both primary and secondary treatment of stormwater flows within the one device.
The Ecosol Sand Filter is a multi-chamber engineered pre-cast concrete system consisting of:
- An inlet chamber with removable filtration basket designed for pre-treatment (primary treatment) of stormwater flows. Pre-treatment of stormwater entering an infiltration system is critical as it minimizes the potential for clogging of the infiltration media;
- A fore-bay chamber to reduce flow velocities entering the systems;
- A secondary filtration chamber consisting of a sand filtration media with ponding for removal of finer particulate pollutants conveyed in stormwater flows (secondary filtration); and
- An overflow chamber ensuring adequate discharge at peak flow eliminating the potential for scouring of the secondary infiltration media.
Ecosol’s Sand Filter series are predominately installed as off-line systems.
- Compact, cost efficient stormwater treatment solution for high density commercial developments
- Supplied as a complete system housed in its own pre-cast pit ready for installation
- Easily maintained by vacuum truck
- Durable robust product engineered for the environment in which it operates
- Treats 100% if incoming flows up to its designed TFR
- Provides both primary and secondary treatment of stormwater within the one device