Development of a novel separation technique for multi-component slurry without chemical agents

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K19873
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 64:Environmental conservation measure and related fields
• Research Institution: Hosei University
• Principal Investigator: Mori Takamasa 法政大学, 生命科学部, 教授 (20345929)
• Co-Investigator(Kenkyū-buntansha): 椿 淳一郎 公益財団法人名古屋産業科学研究所, 研究部, 上席研究員 (50109295)
• Project Period (FY): 2021-07-09 – 2024-03-31
• Keywords: 選択分離 / 直流電場 / 沈降 / 浮上

Outline of Final Research Achievements

We tried to develop a novel separation technique for multi-component slurries in which DC electric field applies to the slurry. Firstly it was demonstrated that the aggregation effect by DC application differ depending on the particle type from the observation of settling behavior after DC application. Furthermore, it was found that the zirconia particles which aggregated easily by DC application could settle quickly, resulting in high amount of zirconia at the bottom the slurry container, while the alumina particles which hardly aggregated by DC application still remained the upper part of the slurry. By supplying the appropriate flow rate of water from the bottom of the container, we can collect non-aggregated alumina particles from the top of the container.

Free Research Field

化学工学、粉体工学

Academic Significance and Societal Importance of the Research Achievements

多成分スラリーから凝集剤等の薬剤を添加することなく特定の有用成分（粒子）のみを濃縮・回収することができれば様々な廃液からのマテリアルリサイクルを実現できる可能性が拓ける。本研究の結果は、廃液等の多成分スラリーにおいて、有用成分粒子の電場による凝集効果が他粒子と異なる場合には、直流電場を印加しながら適当な大きさの上昇流を生じさせることで、上部と下部に分けて、電場による凝集効果が異なる成分を回収できる、すなわち特定の有用成分を濃縮分離できる可能性を示しており、今後のマテリアルリサイクルの可能性を高めると期待できる。