To provide a method and an apparatus for removing substances to be removed from fluid and a sludge separation and recovery device which can recover recyclable materials from sludge and reduce the operation costs of the apparatus.
A magnetic material and a coagulant are continuously supplied to raw water 1 to be stirred, thereby generating magnetic flocs 10. The magnetic flocs 10 are collected in a sludge recovery tank 11 by a magnetic separation and purification device having a mesh 6' having an aperture through which the magnetic flocs 10 cannot pass, a magnetic field generation means 8 for magnetically attracting the magnetic flocs 10, and a scraper 9 for recovering the flocs. In a sludge decomposition tank 12, hydrochloric acid 13 is added to the magnetic flocs 10 to be stirred, thereby decomposing the magnetic flocs. The treated liquid containing the decomposed magnetic flocs is subjected to gravity separation in a sedimentation tank 14, and the treated liquid containing magnetic powder and the coagulant is recycled.
| JPH0760016 | CLARIFIER |
| JPS5850124 | [Title of the Invention] Fluid purifying facility |
NOMURA SEIJI
ISOKAMI HISASHI
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