Liquid purification or separation – Processes – Separating
Patent
1988-02-01
1989-03-28
Hart, Charles
Liquid purification or separation
Processes
Separating
210801, 210241, 210244, 210520, 210 961, 210188, C02F 140
Patent
active
048161675
ABSTRACT:
A vehicle for collecting and dewatering the contents of sanitary sewer traps. The vehicle includes a frame and an elongated tank mounted on the frame with the tank having a rearward end and a forward end. The frame includes a mechanism for elevating the forward end and the tank is pivotally connected to the frame adjacent the rearward end of the tank. A divider separates the tank into a rearward compartment for receiving the contents of the traps and a forward compartment, while a crossover pipe for conveying supernatant liquid from the rearward compartment to the forward compartment has a first leg extending generally parallel to the divider wall from a location adjacent the floor of the rearward compartment. An inlet conduit extends into the rearward compartment for conveying the contents of the traps into the rearward compartment. The vehicle also includes a pump for selectively establishing a subatmospheric pressure in either the rearward compartment or in the forward compartment. The vehicle also includes a vent for the rearward compartment for placing it at atmopsheric pressure so that upon elevating the tank, venting the rearward compartment, establishing a subatmospheric pressure in the forward compartment and controllably lowering the tank, supernatant liquid is drawn into the forward compartment. A method of using the vehicle is also disclosed.
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Hart Charles
Waste Management Inc.
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