Apparatus for separating particulate from stormwater

摘要

A liquid separation system and related method for retaining floating and non-floating particulates within a storage chamber of a treatment tank. The tank may or may not include a bypass to allow a portion of liquid coming into the tank to bypass the storage chamber. The storage chamber includes an inlet and an outlet. The outlet may be positioned within the storage chamber to cause minimal disruption of the primary and secondary liquid flow patterns within the storage chamber. A circular or rotational flow pattern may be created within the storage chamber and an outlet port of the storage chamber may be centered on an axis of the circular flow pattern.

主权项

1. A separation system for separating particulate from liquid, the system comprising:
a) a tank including an inlet for receiving liquid therein and an outlet for transferring liquid out of the tank; b) a storage chamber forming part of the tank, the storage chamber including a bottom and interior sidewalls, an inlet and an outlet; c) a bypass extending through the tank, wherein the bypass is arranged to receive liquid from the tank inlet, to transfer liquid into the storage chamber via the storage chamber inlet and to receive liquid from the storage chamber via the storage chamber outlet; d) a weir configured to direct liquid from the tank inlet to the storage chamber under relatively low flows and under relatively high flows to divert one portion of liquid from the tank inlet to the storage chamber and to allow another portion of liquid to flow directly through the bypass from the tank inlet to the tank outlet without entering the storage chamber; wherein liquid entering the storage chamber is directed to produce a rotational liquid flow, as viewed from the top, within the storage chamber, which rotational liquid flow progresses downwardly within the storage chamber along the periphery of the storage chamber, and a storage chamber outlet port opening is located centrally within the storage chamber and at an elevation that is at or below the bottom of the bypass, and wherein flow in a region of the storage chamber below the storage chamber outlet port opening is substantially unobstructed, and wherein flow into the storage chamber outlet port opening is upward and the storage chamber outlet port opening faces downward, wherein the bypass comprises an elongated U-shaped structure that is open at the top, ends of the U-shaped structure supported in respective U-shaped frames that are mounted to sidewalls of the tank.