Patent ID: 7291262
Filing Date: 2007-11-06
Classification: C02F,E03F

Abstract:
1. A road surface drain system for removing pollutants contained in runoff water, said road surface drain system comprising: an apparatus comprising a maintenance tank and a treatment tank, the maintenance tank having an inlet for the introduction of the runoff water into the apparatus and a common wall with the treatment tank, the treatment tank containing treatment materials for removing the pollutants from the runoff water and having an outlet for discharging purified runoff water positioned at a lower height than the maintenance tank runoff water inlet and having a bottom wall which slopes downwardly toward and is in fluid communication with a bottom wall of the maintenance tank; a discharge conduit for receiving the purified runoff water from the outlet of the treatment tank and discharging the purified runoff water from the system; and a moveable cover having an opening in communication with the inlet and for diverting the flow of runoff water from the inlet to the maintenance tank to into the discharge conduit in a closed position and allowing the runoff water to flow directly to the outlet when the maintenance tank is filled.