1. The rainwater from the connected area is fed into the basal section of the filter housing. The angled inlet generates a radial flow pattern.
2. The hydrodynamic separator converts turbulent waters into a radial laminar flow pattern, generating particle sedimentation, particularly of the sand fraction. This takes place over an inlet to the lower section of the filter shaft. The sediment is retained in a silt trap chamber below the separator. The silt trap can be withdrawn for cleaning, and has an integral cleaning port to the side to ease dirt removal.
3. In the central section of the filter housing is the actual filter and filter Roof. The filter element filters out the fine materials in an up-flow process and dissolved materials are precipitated and adsorbed. The filter is backwashed from above. When exhausted the filter is easily exchanged through the access manway constructed in the roof of the body and the filter element is easily pulled up and removed from the shaft housing.
4. The cleaned water then passes through the discharge outlet. The system utilizes a oil trap system to ensure a clean water to prevent the movement of any oil that isn’t dissolved and retained in the filter elements and is then discharge into water storage, waterway systems or free surface water.

The EnviroFilter incorporates Scottish Engineered Filter Media Stormwater Quality Improvement Device and is employed for heavily polluted traffic areas and has been granted general technical approval (Z-84.2-4) by the German Institute for Structural Engineering (DIBt). Because of its up-flow process it can efficiently work in flat sites requiring only 250 mm fall across the device. Multiple units can be manifolded together to treat higher flows. Each EnviroFilter will provide 8 L/s of treatment flow rate, installed in offline configuration.

• Stormwater treatment filter
• Underground installation, no loss of site surface area
• Designed for TSS,TP and TN removal
• Light, quick and easy to install
• 150-300mm head to drive flow
• Filter modules easy to replace
• 8L/s Treatment Flow rate per Filter

Filter Element:

Material: Filter Substrate: Traffic

Weight 25 kg

Housing:

Material: Fiberglass

Telescopic Extension Tube:

Material: Polyethylene

Weight: 5 kg

Total weight: 37 kg (without Telescopic Extension)

The EnviroProtector range has a series of models to suit the needs of the system it is in place in. With each filter to have a flow rate of 8 L/s, this allows for a continous increase in size of the tank, amount of filters and hence total flowrate to suit all needs. The flow rate, tank size and depth as well as the suitable connection size is shown in the table below.

1. Stormwater Inlet
2. Outlet to water storage, water systems or surface waters
3. Silt Trap
4. Overflow pipe
5. Filter floor restrained to EnviroProtector body
6. Filter element
7. Oil Trap
8. Access Manway and Manway cover

All of the Protector range have been individually engineered to handle the toughest environmental situations and proven in the toughest environments such as high water tables and volcanic soils. Problems in these areas have been solved with the installation of the EcoProtector.

The Packaged EcoProtectors are engineered to the following Standards:BS4994 – 1987, AS/NZS 1546.1:1998. Hydraulic and civil engineering can also be provided to your requirements.

Construction
Even though the EnviroProtector is relatively light weight, pound for pound they are stronger than alternative stuctures. The EnviroProtector has no joins leaving a smooth, clean internal surface that resists scum and sludge build up and allows no leakage to the external environment. The lightweight configuration of the EnviroProtector simplifies handling and reduces costs in transport, labour and handling down time.

The EnviroProtector is designed and built as one homogeneous unit to allow easy handling, transport and most importantly, installation: Ease of onsite installation and access, no heavy cranes and without the assembly of heavy concrete sections in the ground results in considerable cost savings: EnviroProtector cuts down the labour and saves time and money!

A complete installation hand book is supplied to ensure the installation goes smoothly and to plan. The guide provides advice for lifting, OHS measures, handling techniques and other important requirements. Installation is typically:

1. Excavate hole
2. Place station in hole
3. Fill well with water about 20% of total volume
4. Back fill to locking ring
5. Pour ballast
6. Install all connections as per manual*
7. Back fill and pour top slab and install access cover

*All installation requirements are as per installation data manual.