초록 ▼

An outlet for extracting noxious gases generated in a settling tank containing a pool of wastewater, the outlet including an effluent trough supported at a raised position in the pool against the tank wall. The trough is provided with a side wall parallel to the tank wall and lying somewhat below th

An outlet for extracting noxious gases generated in a settling tank containing a pool of wastewater, the outlet including an effluent trough supported at a raised position in the pool against the tank wall. The trough is provided with a side wall parallel to the tank wall and lying somewhat below the surface of the pool, a weir being supported on this side wall and extending upwardly therefrom to permit clarified water from the surface region of the pool to spill over into the trough. Overlying the trough and the weir is a flat walk plate that extends horizontally from the tank to the upper edge of a vertical sidewall which extends downwardly into the pool, the sidewall together with the walk plate acting to confine noxious gases emitted into the region above the trough and the weir to prevent their discharge into the atmosphere. The walk plate includes a hatch cover section providing access to the weir when it becomes necessary to scrub and clean the weir.

대표청구항 ▼

A settling tank for clarifying wastewater, said tank having an outer wall for containing a pool of wastewater so that the water at the surface of the pool is clarified, an outlet in said tank comprising: A. an effluent trough supported at a raised position in the pool against the outer wall of the t

A settling tank for clarifying wastewater, said tank having an outer wall for containing a pool of wastewater so that the water at the surface of the pool is clarified, an outlet in said tank comprising: A. an effluent trough supported at a raised position in the pool against the outer wall of the tank, said trough having a side wall parallel to the tank wall and lying somewhat below the surface of the pool; B. a weir supported on the side wall and extending upwardly therefrom to permit clarified water from the pool to spill over into the trough; and C. a flat walk plate overlying the trough and the weir and including a hatch cover section providing access to the weir, said walk plate extending horizontally from the tank wall to the upper edge of a vertical sidewall that extends downwardly into the pool, said walk plate and said vertical sidewall together acting to confine noxious gases emitted into the region above the trough and the weir to prevent their discharge into the atmosphere.