A vacuum waste system, comprising: a waste tank installable aboard an aircraft, the waste tank including at least one waste inlet capable of receiving a waste stream under suction from at least one of an aircraft toilet and an aircraft receptacle; an integrated vortex separator mounted to the waste tank and in communication with the waste inlet, the integrated vortex separator configured to: a) generate at least one vortex flow by redirecting the waste stream; b) produce a primary airstream by removing at least one of a solid component and a liquid component from the vortex flow; and c) expel the primary airstream from the waste tank under suction via an exhaust port; a vent line in communication with the exhaust port, the vent line configured to direct the primary airstream under suction to an external outlet of the aircraft; and a bypass flow regulator comprising a valve assembly disposed in the vent line, the valve assembly including a plurality of valves set in the path of the primary airstream, the plurality of valves (204a-c) configured to modulate a flow rate of the primary airstream by adjusting an effective flow area, wherein the plurality of valves (204a-c) includes at least one umbrella valve (204a-c), wherein a stem of the at least one umbrella valve is set into a respective one of a plurality of seats (210a-c) within the vent line in a path exiting the primary airstream, wherein the plurality of valves (204a-c) includes at least one of: a first valve fashioned of a flexible material; and a second valve configured to modulate the flow rate by at least partially deforming. a waste tank installable aboard an aircraft, the waste tank including at least one waste inlet capable of receiving a waste stream under suction from at least one of an aircraft toilet and an aircraft receptacle; an integrated vortex separator mounted to the waste tank and in communication with the waste inlet, the integrated vortex separator configured to: a) generate at least one vortex flow by redirecting the waste stream; b) produce a primary airstream by removing at least one of a solid component and a liquid component from the vortex flow; and c) expel the primary airstream from the waste tank under suction via an exhaust port; a) generate at least one vortex flow by redirecting the waste stream; b) produce a primary airstream by removing at least one of a solid component and a liquid component from the vortex flow; and c) expel the primary airstream from the waste tank under suction via an exhaust port; a vent line in communication with the exhaust port, the vent line configured to direct the primary airstream under suction to an external outlet of the aircraft; and a bypass flow regulator comprising a valve assembly disposed in the vent line, the valve assembly including a plurality of valves set in the path of the primary airstream, the plurality of valves (204a-c) configured to modulate a flow rate of the primary airstream by adjusting an effective flow area, wherein the plurality of valves (204a-c) includes at least one umbrella valve (204a-c), wherein a stem of the at least one umbrella valve is set into a respective one of a plurality of seats (210a-c) within the vent line in a path exiting the primary airstream, wherein the plurality of valves (204a-c) includes at least one of: a first valve fashioned of a flexible material; and a second valve configured to modulate the flow rate by at least partially deforming.