Overview of EcoProtector
The EcoProtector is a hydrodynamic, full capture, high-capacity trash and debris removal GPT (Gross Pollutant Trap) with superior litter and organic debris capture. The EcoProtector has been designed to remove particles greater than 5mm using physical processes to trap solid wastes such as litter and coarse sediment under low velocity conditions.
The EcoProtector is commonly used as the primary treatment devices for the removal of large, non-biodegradable pollutants in areas with a high fraction of impervious surfaces such as residential subdivisions, roads, car parks, industrial applications and any area that may require storm-water treatment. Primary treatments include physical screening, rapid sedimentation and separation processes. The typical retained contaminants include gross pollutants and coarse sediments. Gross pollutant traps are most often used as part of a treatment process with other storm-water treatment measures as they are essentially primary treatment devices and they are not entirely effective in removing nutrients.
The process is simple in its design. The stormwater runoff enters the inlet connection and into the initial chamber. The water encounters a trash screen, which removes all gross pollutants from the stormwater. The water then is deflected off the trash screen wall and into the gross pollutant trap chamber. This chamber captures all the large pollutants and sediments. The water then enters a vortex tube, moving the heavier sediments not captured in the gross pollutant trap outwards.
This water then settles in the silt holding chamber and the sedimentation that hasn’t been removed settles on the chamber floor. As the water fills the silt chamber, the outlet riser withdraws the water as the water level rises to the discharge pipe. The oils and hydrocarbons are also removed in this silt chamber as they sit on top of the water due to their high density and hence do not get removed through the outlet riser, whose inlet is located low to the chamber floor.
Features and Applications of EcoProtector
- Residential Subdivisions
- Car parks
- Shopping Centres
- Commercial and Industrial developments
- Tunnels, Highways & Transport Corridors
- Recycling Yards
- Main Stormwater drainage systems
- Heavy Vehicle Maintenance
- Airports Tarmacs
- Transport (Truck and Bus) Depots
- Loading Bays
- Retrofitting to existing Stormwater drainage systems
- Stormwater harvesting projects
- Combined sewer overflows
- Any other applications where the target pollutants are primarily gross
- pollutants and oils and sediment
Max Full Treatment Flow: 18 L/S
Max Total Flow (with Bypass): 180 L/S
Connection Sizes: 100mm – 225mm
Max Full Treatment Flow: 24 L/S
Max Total Flow (with Bypass): 240 L/S
Connection Sizes: 100mm - 375mm
Max Full Treatment Flow: 60 L/S
Max Total Flow (with Bypass): 600 L/S
Connection Sizes: 225mm – 600mm
Max Full Treatment Flow: 140 L/S
Max Total Flow (with Bypass): 1400 L/S
Connection Sizes: 375mm – 900mm
Max Full Treatment Flow: 200 L/S
Max Total Flow (with Bypass): 2000 L/S
Connection Sizes: 600mm – 1350mm
Installation of EcoProtector
The EcoProtector is designed and built as one homogeneous unit to allow easy handling, transport and most importantly, installation: One of the most signiﬁcant advantages of the EcoProtector over any other alternative Gross Pollutant Trap. 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: EcoProtector 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.
- Lower the tank into the excavation site whilst the concrete is still in the slurry form ensuring no sharp objects that may cause penetration of the tank are present. All lifting apparatus is to be supplied by the contractor for installation.
- Ensure the level of the tank matches the installation requirements.
- Fill tank to 20% of total volume.
- Secure the tank with stabilisation bars to hold in place before concrete ballast is used to encase tank
- Insert the concrete Ballast, thickness and radius of which is to suitably match that of the supplied series drawing. This ensures no movement when the tank is empty and to maintain contact with the gravel backfill.
- Fill the area above the ballast with pea gravel up to a maximum height of 100mm below the top of the lid for room for concrete slab.
- Site conditions will be used to determine the size of the concrete slab, determined by a civil engineer. Use of reo bars only when necessary and instructed by the civil engineer.
- Seal all pipe connections to ensure no leakage and install access cover.
Even though the EcoProtector is relatively lightweight, pound for pound they are stronger than alternative structures. The EcoProtector 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 EcoProtector simplifies handling and reduces costs in transport, labour and handling down time.
The underground tank Design Methodology is based on the use of the above standards as described, where applicable:
- The Packaged EcoProtectors are engineered to the following Standards:BS4994 – 1987, AS/NZS 1546.1:1998.
- ASME RTP-1 is used to formulate the Design of the shell under external soil/groundwater loading is based on design for external collapse.
- AS2634 – is used to formulate the design & manufacture and installation of the Penetrations to the stations.
- AS1546 is used to formulate the design load of soil/groundwater and use for the testing methods applied.
- AS1170 is used to formulate the design loads from active loads that the stations are subject to, including the required roof slab design. This standard is also used to formulae the ballast requirements for anti-floatation.