Abstract: A device for clarifying wastewater, preferably on ships, having the following features: A tank for untreated water is connected to a pressure tank via a macerator and a feed pump. The pressure tank is connected to a compressed air source so that the untreated water in the pressure tank is saturated with air. The pressure tank is connected via a line to a decompression tank in which the flotate and clarification water can be separated from each other. An expansion valve is inserted in the line, and a dosing pump for flocculant is connected to the line between expansion valve and decompression tank.

Abstract: An apparatus for the treatment of wastewater, in particular aboard boats, with a treatment tank, which has a receiving portion and a treatment portion, an intake for wastewater in the receiving portion, an outlet on the treatment portion for treated wastewater, which is connected back into the treatment portion via a maceration pump with an intake for treated wastewater, wherein a separating wall with overflow is arranged between the receiving portion and the treatment portion, the receiving portion has a sump for solids and a connection for sea water and disinfecting agent is provided on the treatment portion, wherein a guide wall is arranged at a distance from the upper intake in the receiving portion, which ends above the sump and first directs the entering wastewater in the direction of the sump, the separating wall with a wall adjacent to the treatment portion forms an intermediate reservoir, to which the wastewater is added via the overflow, wherein the other wall has a second overflow to the treatment

Abstract: Process for treating waste water on ships in which the waste water is pretreated by surface filtration, the pretreated waste water being collected in a first tank acting as a mixing tank and optionally enriched with oxygen. The waste water from the first tank is continuously fed to a three stage bioreactor, in which aerobic waste water treatment takes place in a second tank, waste water is fed in batches from a second tank to a third sealed tank, in which denitrification and sedimentation of the solids takes place. Water from the third tank is fed into a fourth tank acting as a settling tank with the largest part of the sludge being recirculated in batches from the third tank into the first tank and, after disinfection, the water from the fourth tank is subjected to fine filtration.

Abstract: Installation for the removal and the deactivation of organisms in the ballast water, with the following characteristic features: a first feed pump for conveying the ballast water, an equipment for gravity precipitation of coarser solids and bigger organisms, connected to the first feed pump, and/or a backwashable filtration equipment, a downstream side connected equipment for the deactivation of micro-germs.

Abstract: Process for treating waste water on ships in which the waste water is pretreated by surface filtration, the pretreated waste water being collected in a first tank acting as a mixing tank and optionally enriched with oxygen. The waste water from the first tank is continuously fed to a three stage bioreactor, in which aerobic waste water treatment takes place in a second tank, waste water is fed in batches from a second tank to a third sealed tank, in which denitrification and sedimentation of the solids takes place. Water from the third tank is fed into a fourth tank acting as a settling tank with the largest part of the sludge being recirculated in batches from the third tank into the first tank and, after disinfection, the water from the fourth tank is subjected to fine filtration.

Abstract: Installation for the removal and the deactivation of organisms in the ballast water, with the following characteristic features: