Roger Lee Peters

US Patent:

20170252673, Sep 7, 2017

Filed:

Mar 7, 2016

Appl. No.:

15/063397

Inventors:

- Montreal, CA
John Vorwaller - Salt Lake City UT, US
Hugh Ryan Clark - Lehi UT, US
Todd Kline - Salt Lake City UT, US
Ralph Petrone - South Jordan UT, US
Bruce A. Hugo - Sandy UT, US
Roger Peters - Salt Lake City UT, US
Tyson Beaman - Taylorsville UT, US

International Classification:

B01D 21/00
B01D 21/24

Abstract:

A clarifier in a wastewater treatment plant is provided with a submerged launder for effluent, the launder preferably having an integral density current baffle and scum baffle. In one embodiment an existing launder is modified, with its vertical leg replaced with a sloped plate defining launder conduit triangular in cross section, and with a sloping portion of the plate forming a density current baffle. Openings in the sloped plate permit entry of effluent liquid, and the liquid level in a clarifier is controlled without an overflow weir plate. In another form submerged pipe with entry holes serves as the launder, with support brackets integral with a density current baffle. A third form of the launder is a box formed beneath the shelf of an existing internal launder in the clarifier, again with a density current baffle extending down from the box. In another version an existing launder is covered and sealed, and holes are drilled through the launder wall to admit effluent. A submerged launder avoids problems of algae buildup and the need for algae sweeps or frequent cleaning of the launder.