Device for improving water quality
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United States of America Patent
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Oct 27, 2020
Grant Date -
Aug 1, 2019
app pub date -
Apr 13, 2019
filing date -
Aug 18, 2015
priority date (Note) -
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Abstract
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 relatively coarse 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 the opening bypasses the outlet.
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