Abstract:
The present invention provides a method of installing an environmental control system so as to allow for separate sizing of treatment and bypass capacity while also offering the ability to make or change either treatment or bypass capacities at different times. This is accomplished by containing the treatment and bypass functions in separate chambers, using screen, baffle, or coalescing media pack to further refine effectiveness and capacity of each structure independently. The control structure and interceptor structure may be pre-engineered to a variety of sizes, capacities, or other specifications. This allows simple selection of a specific control structure and a specific interceptor structure from a variety of combinations, eliminating the need for custom engineering for each installation.
Abstract:
A treatment station for a water drainage conduit has a chamber with an inlet and outlet in fluid communication with upstream and downstream sections of the conduit and a sediment collection portion. Water enters the chamber via the inlet, collecting in the sediment collection portion until it reaches a level in the chamber such that it flows out of the outlet. A filter is mountable above the sediment collection portion for the upwards-flowing filtration of water passing through the chamber to remove organic contaminants. Access means are provided for removal and replacement of the filter and removal of solid material deposited in the sediment collection portion. The treatment station may also have by pass means which operate where the flow of water exceeds a rate which can flow through the filter and preliminary sediment collection chamber for collecting large quantities of sediment. Uses of the treatment station are also described.
Abstract:
A treatment station for a water drainage conduit has a chamber with an inlet and outlet in fluid communication with upstream and downstream sections of the conduit and a sediment collection portion. Water enters the chamber via the inlet, collecting in the sediment collection portion until it reaches a level in the chamber such that it flows out of the outlet. A filter is mountable above the sediment collection portion for the upwards-flowing filtration of water passing through the chamber to remove organic contaminants. Access means are provided for removal and replacement of the filter and removal of solid material deposited in the sediment collection portion. The treatment station may also have by pass means which operate where the flow of water exceeds a rate which can flow through the filter and preliminary sediment collection chamber for collecting large quantities of sediment. Uses of the treatment station are also described.
Abstract:
A gully for receiving and separately discharging dirty waste water and relatively clean rainwater comprises a gully body (2) with a bottom (3) and a side wall (4). The gully body is provided with an inlet (5) made at a certain height in the side wall, a first outlet (6) made in the side wall at a lower level than the inlet, and a second outlet (7) made in the side wall at substantially the same height as the inlet. The inlet (5) and the second outlet (7) are connected to each other in the interior of the gully by means of a connecting pipe part (8) that is provided with a lateral branch (9) facing the bottom (3) of the gully. A ball (10) is situated in the interior of the gully, which ball can float on water and has a diameter that is greater than the diameter of the lateral branch, and which ball can close off the lateral branch when the water level rises in the gully.
Abstract:
The device herein disclosed and described provides a water collection system that separates the initial flush of rainwater, which contains higher concentrations of undesirable contaminants from later received rainwater having lower concentrations of contaminants to be stored for later use or to be discharged directly to receiving bodies of water. The device contains a cistern for treating first flush rainwater, a basin for receiving water in fluid connection with the cistern and a water storage tank, a water diversion channel that diverts first flush rain water to the cistern and additional rainwater to a water storage tank, a floatation device on a connecting rod affixed to the diversion channel that acts to operate the diversion channel when the water in the cistern achieves a desired height by diverting the additional water received to the water storage tank.
Abstract:
A method and apparatus for treating contaminated stormwater runoff from roads and adjacent lands. A multi-stage and self-contained integrated module is designed to collect the first flush of stormwater runoff (which contains the majority of pollutants) and to treat the pollutants using sedimentation, filtration and constructed wetlands. The apparatus is mass-produced to provide standardized hydrologic controls, important to the reliability of the constructed wetland component of the apparatus.Raw stormwater enters the central sedimentation chamber of the apparatus which is divided into multiple segments designed to provide a series of sedimentation/filtration chambers. At least one chamber is provided with a removable filter bulkhead. Effluent from the final sedimentation chamber is discharged to the constructed wetland system which surrounds the central sedimentation tank. Water flows through the perimeter wetland system in subsurface/saturated conditions and contacts the root zone of the constructed wetland where biochemical interactions attenuate pollutants.A skimmer tube may be positioned in at least one chamber to pass water from near the surface through an adjacent bulkhead to the lower part of the next chamber.A hydrologic control valve in the apparatus regulates the flow of water from the central sedimentation tank to the wetland and the effluent discharge rate out of the wetland. This control and the standardization of the construction allows for precise hydrologic controls designed to provide a 5-10 day holding time within the apparatus.
Abstract:
A hydraulic diverter comprises a pair of tubes connected to receive water from a storm drain. One of the tubes is connected to discharge the water into a basin, while the other is connected to discharge water and bed sediment load into a bypass line. The storm water flow is preferentially directed through one tube or the other by changing the relative elevations of the tubes. The tubes are coupled together to change elevations by a pulley system or a swivel system. The pollutant laden "first flush" flow of storm water is diverted to the basin, while subsequent or "sustained" flow transporting bed sediment load is directed through the bypass line. The storm water itself is utilized to change the relative elevations of the tubes when the storm water flow transitions from a first flush flow to a sustained flow.
Abstract:
A treatment station for a water drainage conduit has a chamber with an inlet and outlet in fluid communication with upstream and downstream sections of the conduit and a sediment collection portion. Water enters the chamber via the inlet, collecting in the sediment collection portion until it reaches a level in the chamber such that it flows out of the outlet. A filter is mountable above the sediment collection portion for the upwards- flowing filtration of water passing through the chamber to remove organic contaminants. Access means are provided for removal and replacement of the filter and removal of solid material deposited in the sediment collection portion. The treatment station may also have by pass means which operate where the flow of water exceeds a rate which can flow through the filter and preliminary sediment collection chamber for collecting large quantities of sediment. Uses of the treatment station are also described.
Abstract:
A filter assembly (10) for installation in a chamber (11) including: a flow guide (12) extendable across the chamber (11) providing a path between a chamber inlet (20) and a chamber outlet (42); a diversion means (24) associated with the flow guide (12), said diversion means (24) adapted to divert water from the flow guide (12); and a return inlet (14) associated with the flow guide (12) and adapted to return treated water to the flow guide (12) or to allow treated water to pass through to the chamber outlet (42) wherein the return inlet (14) is located downstream of said diversion means (24).