Patent ID: 7473356

Claim:
A wastewater treatment system comprising a magnetism adding means for adding magnetism to material to be separated in wastewater, and a superconducting magnetic separation means for separating the material from the wastewater by collecting the magnetism-added material through the magnetic field generated by a solenoid-type superconducting magnet, wherein: said superconducting magnetic separation means comprises in a bore of the superconducting magnet a multiunit magnetic filter consisting of a plurality of single-unit magnetic filters that are removably built up, and the multiunit magnetic filter has a longitudinal length at least equal or greater than a longitudinal length of the superconducting magnets; and wherein the system further comprises a transfer and wash means for removing a single-unit magnetic filter from an upstream side of said multiunit magnetic filter by pushing in another single-unit magnetic filter from a downstream side, and for washing and returning the removed filter to the downstream side again during excitation of the superconducting magnet.