Patent ID: 8808548

Claim:
A magnetic separation apparatus, comprising: a separation tank to which wastewater containing flocculated magnetic flocs is supplied; a drum-shaped separator having an outer periphery, the outer periphery having a constant radius along an axis of rotation of the drum-shaped separator, wherein the drum-shaped separator adsorbs the magnetic flocs on the outer periphery with magnetic force while being rotated, and the drum-shaped separator is arranged in the separation tank; and a collection device that collects the magnetic flocs adsorbed by the drum-shaped separator, wherein a cross section of the separation tank is substantially semicircular, a supply portion of the wastewater is provided at one top end of both top ends of the separation tank, the one top end being located upstream in a rotational direction of the drum-shaped separator, and an outlet portion of treated water is provided at the other to end of the both top ends, the other top end being located downstream in the rotational direction of the drum-shaped separator, wherein the rotational direction of the outer periphery of the drum-shaped separator in the wastewater in the separation tank is set to be the same as a flow direction of the wastewater flowing in the separation tank as well as substantially a lower half of the drum-shaped separator being submerged in the wastewater in the separation tank, and wherein the collection device comprises a flat plate-shaped scraper to scrape the magnetic flocs on the outer periphery of the drum-shaped separator.