Sewage Treatment Performance of a Continuous Superconducting-Magnetic Separator

• Published in: JSME International Journal Series B Fluids and Thermal Engineering Vol. 44; no. 4; pp. 675 - 679
• Main Authors: ISOGAMI, Hisashi, SAHO, Norihide, MORITA, Minoru, TAKAGI, Takeo
• Format: Journal Article
• Language: English
• Published: Tokyo The Japan Society of Mechanical Engineers 2001; Japan Society of Mechanical Engineers; Japan Science and Technology Agency
• Subjects: Applied sciences; Biochemical oxygen demand; Effluents; Energy Saving; Environmental Engineering; Exact sciences and technology; Magnetic field effects; Magnetic filters; Magnetic Separation; Magnetic separators; Other wastewaters; Pollution; Sewage Treatment; Solid-liquid Separation; Superconducting Magnet; Superconducting magnets; Wastewaters; Water treatment and pollution; Superconducting magnet; Solid liquid separation; Magnetic separation; Energy conservation; Biological oxygen demand; Magnetic treatment; Urban waste water; Physicochemical purification; Waste water purification; Experimental study
• ISSN: 1340-8054; 1347-5371
• DOI: 10.1299/jsmeb.44.675

A system that uses magnetic force can be effective for treating sewage water because it can rapidly separate solids from liquid. We are developing such a system that uses a superconducting magnet that consumes little power but produces a strong magnetic field. The system also uses rotating magnetic filters and can be operated continuously. We constructed a prototype and tested it using sewage water. The system successfully removed 90% of BOD (biochemical oxygen demand; the BOD in the effluent for this system was less than 0.22 μm) and 97% of SS (suspended solids). This means that the total space required for a sewage treatment facility might be reduced when such a system is used.