Portable suction unit for the simultaneous suction of different waste fractions by means of an air suction flow, comprising the portable suction unit: • a blower device for generating the air intake flow and • a waste collection container with ∘ an air inlet duct system, defining an air inlet direction into an air flow deflection section, ∘ an air outlet duct system defining an air outlet direction from the air flow deflecting section and ∘ a collecting tank volume arranged between the air inlet duct system and the air outlet duct system, wherein the blower device is structurally coupled to the waste collection container such that the air intake flow enters the collection container volume through the air inlet duct system and exits the collection container volume through the air outlet duct system while passing through the air flow deflector section, characterised in that the air inlet duct system, the air outlet duct system and the collecting container volume are designed and arranged in such a way that an air intake flow deflection of more than 40 degrees takes place between the air inlet direction and the air outlet direction in the air flow deflection section, which causes an inertia-gravity separation between different waste fractions, wherein a mechanical separating device with a plurality of opening dimensions for the air intake flow is arranged between the air inlet duct system and the air outlet duct system in such a way that a waste fraction sucked against an inflow surface of the mechanical separating device and held by the air intake flow passes into the collection container volume due to gravity after the air intake flow is switched off. comprising the portable suction unit: • a blower device for generating the air intake flow and • a waste collection container with ∘ an air inlet duct system, defining an air inlet direction into an air flow deflection section, ∘ an air outlet duct system defining an air outlet direction from the air flow deflecting section and ∘ a collecting tank volume arranged between the air inlet duct system and the air outlet duct system, • a blower device for generating the air intake flow and • a waste collection container with ∘ an air inlet duct system, defining an air inlet direction into an air flow deflection section, ∘ an air outlet duct system defining an air outlet direction from the air flow deflecting section and ∘ a collecting tank volume arranged between the air inlet duct system and the air outlet duct system, ∘ an air inlet duct system, defining an air inlet direction into an air flow deflection section, ∘ an air outlet duct system defining an air outlet direction from the air flow deflecting section and ∘ a collecting tank volume arranged between the air inlet duct system and the air outlet duct system, wherein the blower device is structurally coupled to the waste collection container such that the air intake flow enters the collection container volume through the air inlet duct system and exits the collection container volume through the air outlet duct system while passing through the air flow deflector section, characterised in that the air inlet duct system, the air outlet duct system and the collecting container volume are designed and arranged in such a way that an air intake flow deflection of more than 40 degrees takes place between the air inlet direction and the air outlet direction in the air flow deflection section, which causes an inertia-gravity separation between different waste fractions, wherein a mechanical separating device with a plurality of opening dimensions for the air intake flow is arranged between the air inlet duct system and the air outlet duct system in such a way that a waste fraction sucked against an inflow surface of the mechanical separating device and held by the air intake flow passes into the collection container volume due to gravity after the air intake flow is switched off.