Patent ID: 6994783
Filing Date: 2006-02-07
Classification: B01D

Abstract:
1. A trap for separating pollutants from a liquid, comprising: a chamber having an inlet, an outlet, an at-rest liquid level when none of the liquid is flowing into the chamber, and a maximum liquid level when the liquid is flowing through the chamber at a predetermined maximum liquid flow rate; a screen disposed in the chamber adjacent the inlet, wherein the screen extends substantially all the way across the chamber so that the liquid is dispersed by the screen as it enters the chamber, and the screen has an open side disposed adjacent the inlet and a bottom side that is disposed below the maximum liquid level and at or above the at-rest liquid level so that the screen retains some of the pollutants, allows the liquid to pass therethrough, and suspends the retained pollutants above the at-rest liquid level; and a collection reservoir disposed in the chamber between the inlet and the outlet, wherein the collection reservoir has a front wall with a skimming edge, a rear wall, and a bottom wall extending between therebetween, wherein the front wall skimming edge is disposed at the maximum liquid level to skim floating portions of the pollutants into the collection reservoir, the bottom wall is disposed above the chamber floor to permit the liquid to flow under the collection reservoir, and the rear wall extends above the operating liquid level to prevent pollutants from flowing out of the collection reservoir and to prevent the liquid from flowing back into the collection reservoir.