| 摘要 |
PROBLEM TO BE SOLVED: To provide a recovery method in which the time and cost required in a post-processing step can be reduced to the minimum when recycling silicon and/or water obtained by solid-liquid separation of wastewater containing silicon particles; and a recovery system applied for performing the method.SOLUTION: In an ultrafiltration membrane concentrator 2 having a first membrane, partially removed concentrated wastewater is obtained in which the wastewater is concentrated while silicon particles of diameters that are less than a predetermined value are removed from the wastewater. The partially removed concentrated wastewater is frozen in a freezing flocculator 3 to form an aggregate in which silicon particles remaining in the partially removed concentrated wastewater are aggregated. The frozen object obtained by the freezing flocculator 3 is melted, melted water containing the aggregate is obtained, and the melted water undergoes solid-liquid separation in a solid-liquid separator 4 having a second membrane. |
