| 摘要 |
In water treatment employing coagulation and magnetic separation, in which a flocculant and a magnetic powder are introduced into wastewater and magnetic flocs produced are removed, a water treatment system with simple system configuration, which is capable of continuously collecting magnetic powder from the sludge with high efficiency, and reusing the magnetic powder is provided. In the water treatment system, a flocculant and a magnetic powder are added to water to be treated so as to form magnetic flocs, the magnetic flocs are magnetically collected from the water, a sludge composed of the magnetic flocs produced in the purification is fed under application of pressure, and is heated in a reactor at high temperature and high pressure conditions to collect the magnetic powder from the sludge that has passed through a back pressure regulating valve. The collected magnetic powder is reused again.
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