Denitrification and dephosphorization composite filler, preparation method and application

US12403450B2 · kind B2 · utility

Assignees

• Beijing University of Civil Engineering and Architecture · CN
• China Electronics Engineering Design Institute Co., Ltd. · CN

Inventors

• Haiyan Li · Longbeilingcun, CN
• Zhaoying Liu · Beijing, CN
• Yingjie Shen · Ürümqi, CN
• Haijun Zhang · Beijing, CN
• Ziyang Zhang · Suzhou, CN
• Meipeng Jian · Beijing, CN
• Chaohong Tan · Beijing, CN
• Yuanping Fang · Beijing, CN

Key dates

• Filing date: Jan 16, 2025
• Grant date: Sep 2, 2025
• Expiry date: Jan 16, 2045

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W10/10
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention provides a denitrification and dephosphorization composite filler, a preparation method and application. The composite filler is prepared with a polysulfone polymer as a skeleton and a hybrid denitrification electron donor material by an immersion precipitation phase conversion method. The composite filler designed by the present invention has uniform ball formation and strong controllable performance, solves the problem of poor stability of denitrification and dephosphorization in a system due to the disadvantages of easy system blockage, high consumption speed, weak synergy, etc. in the traditional improved medium, and has broad application prospects in wastewater treatment.