公开(公告)号：US20250115499A1

公开(公告)日：2025-04-10

申请号：US18904997

申请日：2024-10-02

Applicant: MEGA UNION TECHNOLOGY INCORPORATED

Inventor： KUO-CHING LIN ,  SHR-HAN SHIU ,  HUNG-EN LIN ,  YI-QING CHEN

IPC: C02F1/68 ,  C02F1/58 ,  C02F1/66 ,  C02F101/14 ,  C02F103/34

Abstract: An advanced defluoridation agent and a method for removing fluoride ions in fluorine-containing wastewater are provided. The advanced defluoridation agent includes 40-70 wt % of polyaluminum sulfate, 0.3-30 wt % of hydroxyapatite and deionized water supplemented to 100 wt %. Using the advanced defluoridation agent of the present disclosure to treat fluoride-containing wastewater can achieve increased defluorination efficiency, reduced electrical conductivity, and reduced sludge content, and a better defluorination effect. The concentration of fluoride ions is lower than 15 ppm after using the advanced defluoridation agent of the present disclosure.

公开(公告)号：US20250115498A1

公开(公告)日：2025-04-10

申请号：US18905017

申请日：2024-10-02

Applicant: MEGA UNION TECHNOLOGY INCORPORATED

Inventor： KUO-CHING LIN ,  SHR-HAN SHIU ,  HUNG-EN LIN ,  YI-QING CHEN

IPC: C02F1/52 ,  C02F1/58 ,  C02F101/14

Abstract: A two-stage system and method for treating fluoride-containing wastewater are provided. The two-stage system includes a first concentration defluoridation section and a second concentration defluoridation section. In the first concentration defluoridation section, the first mixed wastewater containing high concentration of fluoride ions is mixed with calcium chloride and stirred in the second mixing tank to obtain the second mixed wastewater containing low-concentration fluoride ions; in the second concentration defluoridation section, the second mixed wastewater is mixed with an advanced defluoridation agent and stirred in the third mixing tank to form a third mixed wastewater; the third mixed wastewater is introduced into a flocculation tank from the third mixing tank; and polymer is added for flocculation and sedimentation, so as to discharge a sediment and a defluoridation wastewater, the fluoride ion of which is less than 15 ppm.