Grit chamber for wastewater treatment plant, capable of...

Details Grit chamber for wastewater treatment plant, capable of... Grit chamber for wastewater treatment plant, capable of...

2005-07-21

2009-12-29

Cecil, Terry K (Department: 1797)

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Material level or thickness responsive

C210S087000, C210S137000, C210S528000

Reexamination Certificate

active

07638043

ABSTRACT:
A grit chamber for a wastewater treatment plant. A vertical floodgate is installed on a partitioning wall and is driven in a vertical direction to be opened downwardly from a top toward a bottom. A floodgate driving motor is coupled to one end of the vertical floodgate to directly drive the vertical floodgate. An inflow amount measurement sensor functions to stepwisely measure a flow amount of wastewater which passes through a wastewater tank. A control section is connected to the floodgate driving motor and the inflow amount measurement sensor to control the floodgate driving motor in response to a measurement result of the inflow amount measurement sensor. A wastewater level is adjusted within a predetermined range through operation of the vertical floodgate to maintain a constant flow velocity of wastewater which passes through a sand sedimentation zone, thereby preventing organic material which is contained in the wastewater and is other than sand, from sedimenting.

REFERENCES:
patent: 3630372 (1971-12-01), Weir et al.
patent: 2004/0011738 (2004-01-01), Albertson
patent: 1306116 (2003-05-01), None
patent: 2001025610 (2001-01-01), None
patent: 0346465 (2004-03-01), None
International Search Report mailed on Jan. 12, 2006 by the Korean Intellectual Property Office in counterpart application No. PCT/KR2005/002370.
International Preliminary Report on Patentability completed Jul. 26, 2006 by the Korean Intellectual Property Office in counterpart foreign application No. PCT/KR2005/002370.

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