DEVICE FOR IMPROVING WATER QUALITY

摘要

Disclosed herein is a device for improving the quality of rainwater/stormwater by removing pollutants therefrom. The device comprises a substantially cylindrical tank having an inlet for entry of liquid and an outlet for discharge of liquid. A coarse filter is provided in the tank for filtering gross pollutants from inflowing liquid, the coarse filter dividing the tank into an upstream first region/chamber and a downstream second region/chamber. A fine pollutant discharge opening is located between the coarse filter and the outlet. A valve comprising a valve member for opening and closing the fine pollutant discharge opening is configured to automatically open the fine pollutant discharge opening to discharge an initial volume of the liquid passing the coarse filter, the valve member being biased toward a configuration for closure of the opening during an inflow event. The liquid passing through opening bypasses the outlet.

主权项

1. A device for improving water quality, said device comprising:
a tank; an inlet for entry of liquid into the tank; an outlet for discharge of liquid from the tank; a coarse filter in the tank for filtering gross pollutants from liquid fed into the tank through the inlet, the coarse filter dividing the tank into an upstream first region and a downstream second region, the coarse filter allowing relatively fine pollutants in the liquid to pass into the second region whilst inhibiting relatively coarse pollutants from passing into the second region, wherein the inlet is associated with the first region of the tank and the outlet is associated with the second region of the tank; a bypass mechanism in the tank, the bypass mechanism having a first configuration in which liquid passing the coarse filter is directed to bypass the outlet, and a second configuration in which liquid passing the coarse filter is directed to flow through the outlet, the bypass mechanism:
being configured to automatically adopt the first configuration to cause an initial volume of the liquid passing the coarse filter to bypass the outlet, andbeing biased toward the second configuration during an inflow event.