A sewage treatment device includes a stirring structure, a filter box, a tank filter, and a detection structure which are connected in sequence. Conveying pipelines are connected to an exterior of the stirring structure to convey sewage to an interior of the stirring structure. First water pumps are connected to the conveying pipelines to provide conveying power. An upper-layer stirrer assembly, a lower-layer stirrer assembly and a rotating shaft configured to install the upper-layer stirrer assembly and the lower-layer stirrer assembly are arranged in the interior of the stirring structure. A lifting driving cylinder drives the upper-layer stirrer assembly and the lower-layer stirrer assembly to move up and down. The upper-layer stirrer assembly includes an engaging block axially engaged with the rotating shaft and stirring blades arranged around the periphery of the engaging block at equal intervals.

A ceramic toilet pan 12 has a raised rear portion 18 to which a hinge tube 28 may be accurately located and fixed in position for example by adhesive using a jig 22 despite variations in pan body size due to ceramic firing, a water pump 82 and air pump 102 being provided for flushing the toilet pan 10 when a seat 58 and lid 56 are in a closed position, the seat and lid being rotationally mounted to the pan 12 by a horizontal hinge pin 180 located in the hinge tube 28, a latch member 194 being provided for latching the lid 56 and seat 58 closed, a cistern having an overflow weir 320.

In a lavatory arrangement comprising a vacuum flushing system, the lavatory arrangement comprises a folding toilet bowl.

An example system includes a sewage pit; a suction pipe extending into the sewage pit; and a valve between the sewage pit and a vacuum pipe having a vacuum pressure. The valve is controllable to close or to open to allow content to flow from the sewage pit, through the suction pipe, to the vacuum pipe. A sensor tube extends into the sewage pit to sense a fill level of the sewage pit. The suction pipe is configured as a back-up to the sensor tube for sensing the fill level of the sewage pit. The valve is controllable based on a pressure in at least one of the suction pipe or the sensor tube meeting or exceeding a predefined level.

Waste transfer system for a toilet of a public transport vehicle that discharges into an on-board waste aerated storage tank, comprising a waste intermediate tank (1), means for generating negative or positive pressure inside said waste intermediate tank (1), and a discharge valve means (3,5,6,7) to regulate the flow through a first waste passage (8) between a toilet bowl (2) and said waste intermediate tank (1) and through a second waste passage (11) between said waste intermediate tank (1) and said waste storage tank, characterized in that said discharge valve means comprise a multi-port discharge valve (3) connectable to an inlet/outlet port (4) of the waste intermediate tank (1), said multi-port discharge valve (3) being configured to provide, in a first working position, direct communication between said toilet bowl (2) and said waste intermediate tank (1) when negative pressure is supplied inside said waste intermediate tank (1) and to provide, in a second working position, direct communication between the waste intermediate tank (1) and the waste storage tank when positive pressure is supplied in the said waste intermediate tank (1).

The present invention aims for providing an excrement treatment device capable of directly discharging sewage in a sewage tank to the outside sewers by a compressed air supplied from the excrement treatment device. The present invention includes a step of opening a suction port of a suction valve 44 of a sewage tank 19 and closing a water discharge valve 46 of the sewage tank 19; a step of sucking air in the sewage tank 19 from an air inlet/outlet 45 of the sewage tank 19 and sucking a sewage from a pipe connected to a suction port of the suction valve 44 to store the sewage; a step of closing the suction port of the suction valve 44 of the sewage tank 19 and opening the water discharge valve 46 of the sewage tank 19; and a step of injecting a compressed air into the air inlet/outlet of the sewage tank 19 to discharge the stored sewage to an outside from the water discharge valve 46.

Methods and systems for equipping a toilet with hygiene and safety features by controlling and reducing potential escape of liquid waste from the toilet.

A vacuum sewer monitor includes a venturi pipe having an inlet portion, a choke portion, and an outlet portion. The choke portion includes a smaller diameter than the entrance portion and the outlet portion. A first pressure sensor is configured to read a level of pressure at the inlet portion. A second pressure sensor configured to read a level of pressure at the choke portion. A transmitter is configured to send the levels of pressure of the first pressure sensor and the second pressure sensor to a remote computing system.

A pump-storage device includes a tank, a treatment container, and a vacuum pump. The treatment container includes a first chamber in communication with an inlet. The first chamber includes a bottom wall having a first valve intercommunicated with a second chamber. The second chamber includes a bottom wall having a second valve. The treatment container includes a first control valve having a first duct in communication with the first chamber, a second duct in communication with the second chamber, and a third duct in communication with the tank. The treatment container includes an actuation cylinder for actuating an actuation rod to extend or retract. A first valve plate and a second valve plate are mounted on the actuation rod for controlling opening and closing of the first valve and the second valve. The treatment container includes a second control valve in communication with the first chamber and the vacuum pump.

A lavatory system includes a toilet having a front end, a back end, a top end, and a bottom end, and a tube having a first end coupled to the toilet toward the top end and a second end extending above the top end. The toilet includes a toilet bowl defined by the front end, the back end, the top end, and the bottom end, and a toilet seat coupled to the toilet bowl on the top end.