In a conventional flocculation and magnetic separation device, it was not possible to make the device downsized because the flocs are easily broken. In addition, there was no system for the ballast water treatment that is capable of simultaneous removal of plastics and microplastics drifting in the ocean. Furthermore, there were no ships and their navigation method capable of solving the pollution problem caused by plastics and microplastics floating in the ocean. By arranging a magnetic drum that rotates in a direction opposite to the flow of a fluid containing flocs and by changing the flow path by about 180 degrees or so immediately before contacting the magnetic drum, the flocs can be removed without breaking. This method can downsize the size of the magnetic drum with the required area reduced. By combining small-sized flocculation and magnetic separation device and a device that breaks and recovers floating plastics, it is possible to remove plastics and microplastics floating in the ocean at the same time. By taking into account the status of marine plastics in the ship's planned route information, it becomes possible to remove plastics and microplastics floating on the ocean by the ship.

A conveying system, such as a conveying system for material including non-ferrous metals, includes a conveying belt and a stabilizer. The conveying belt includes a conveying surface and is adapted to convey the material on the conveying surface. The stabilizer is configured to apply a stabilizing force onto the material on the conveyor belt such that the material is stabilized while being conveyed. A method of stabilizing material on a conveyor belt includes receiving the material on the conveying surface of the conveyor belt, conveying the material at a conveying speed with the conveyor belt, and applying the stabilizing force onto the material with a stabilizer such that vertical displacement of at least some of the material is dampened and/or minimized at the conveying speed.

A conveying system, such as a conveying system for material including non-ferrous metals, includes a conveying belt and a stabilizer. The conveying belt includes a conveying surface and is adapted to convey the material on the conveying surface. The stabilizer is configured to apply a stabilizing force onto the material on the conveyor belt such that the material is stabilized while being conveyed. A method of stabilizing material on a conveyor belt includes receiving the material on the conveying surface of the conveyor belt, conveying the material at a conveying speed with the conveyor belt, and applying the stabilizing force onto the material with a stabilizer such that vertical displacement of at least some of the material is dampened and/or minimized at the conveying speed.

A device for separating a metalliferous, lumpy mixture, with a conveyor belt and with a rotating drum in which a fixed magnet system with at least one magnet line is arranged. The separating effect of the device is improved and its complexity is reduced where it is provided that the magnets of the at least one magnet line are arranged such that their poles have the sequence NS SN or SN NS in the circumferential direction, as a result of which the ratio of the maximum radial magnetic flux density to the maximum tangential magnetic flux density on the belt surface, facing the material, in the region of the magnet system is greater than one and, owing to this, the electrically conductive particles are separated out into the first partial stream by radial force action (repulsion).

A device for separating a metalliferous, lumpy mixture, with a conveyor belt and with a rotating drum in which a fixed magnet system with at least one magnet line is arranged. The separating effect of the device is improved and its complexity is reduced where it is provided that the magnets of the at least one magnet line are arranged such that their poles have the sequence NS SN or SN NS in the circumferential direction, as a result of which the ratio of the maximum radial magnetic flux density to the maximum tangential magnetic flux density on the belt surface, facing the material, in the region of the magnet system is greater than one and, owing to this, the electrically conductive particles are separated out into the first partial stream by radial force action (repulsion).

System and method for treating scrubber and ballast wastewater at the same time. The method includes mixing ballast and scrubber wastewater to make a suspended solid concentration or turbidity of the obtained wastewater mixture constant, the scrubber wastewater produced by bringing exhaust gas and scrubber washing water into contact with each other in a scrubber; adding magnetic powder to the wastewater mixture; and magnetically separating magnetic flocs obtained in the adding. The system includes a mixer that mixes ballast and scrubber wastewater to make a suspended solid concentration or turbidity of the obtained wastewater mixture constant, the scrubber wastewater produced by bringing exhaust gas and scrubber washing water into contact with each other in a scrubber; a magnetic powder adding device that adds magnetic powder to the wastewater mixture obtained by the mixer; and a magnetic separator that magnetically separates magnetic flocs obtained by the magnetic powder adding device.

System and method for treating scrubber and ballast wastewater at the same time. The method includes mixing ballast and scrubber wastewater to make a suspended solid concentration or turbidity of the obtained wastewater mixture constant, the scrubber wastewater produced by bringing exhaust gas and scrubber washing water into contact with each other in a scrubber; adding magnetic powder to the wastewater mixture; and magnetically separating magnetic flocs obtained in the adding. The system includes a mixer that mixes ballast and scrubber wastewater to make a suspended solid concentration or turbidity of the obtained wastewater mixture constant, the scrubber wastewater produced by bringing exhaust gas and scrubber washing water into contact with each other in a scrubber; a magnetic powder adding device that adds magnetic powder to the wastewater mixture obtained by the mixer; and a magnetic separator that magnetically separates magnetic flocs obtained by the magnetic powder adding device.

A magnetic separator for a product having ferrous and non-ferrous particles includes a housing having an entry section and a cleaning section. A driven magnetic roller is disposed within the cleaning section. A non-magnetic isolator including inner and outer surfaces is positioned in the cleaning section and surrounds and seals the driven magnetic roller. The driven magnetic roller is positioned proximate the inner surface of the non-magnetic isolator. The magnetic roller includes a magnetic field that penetrates a flow of product contacting the non-magnetic isolator wherein ferrous particles travel along the outer surface of the isolator and non-ferrous particles do not travel on the outer surface separating the ferrous and non-ferrous particles. The driven magnetic roller has no direct contact with the product.

A magnetic separator for a product having ferrous and non-ferrous particles includes a housing having an entry section and a cleaning section. A driven magnetic roller is disposed within the cleaning section. A non-magnetic isolator including inner and outer surfaces is positioned in the cleaning section and surrounds and seals the driven magnetic roller. The driven magnetic roller is positioned proximate the inner surface of the non-magnetic isolator. The magnetic roller includes a magnetic field that penetrates a flow of product contacting the non-magnetic isolator wherein ferrous particles travel along the outer surface of the isolator and non-ferrous particles do not travel on the outer surface separating the ferrous and non-ferrous particles. The driven magnetic roller has no direct contact with the product.

There is provided a magnet separator that removes a magnetic body from a liquid to be treated, the magnet separator including a rotary drum in which a plurality of magnets are disposed, and a sprocket that is fixed to the rotary drum and transmits a driving force, in which the sprocket is formed by a plurality of sprocket split bodies having sprocket teeth.