从废水中选择性回收磷的填充床双极膜电渗析系统及方法
By constructing a packed-bed bipolar membrane electrodialysis system and adopting a multi-stage series continuous operation method, the selective separation of chloride ions and phosphate ions in anaerobic digestion liquid was achieved using a mixed resin bed. This solved the problems of insufficient phosphoric acid purity and unstable operation in existing technologies, and realized efficient phosphoric acid resource recovery and stable treatment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANJIN POLYTECHNIC UNIV
- Filing Date
- 2026-01-13
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies are unable to effectively separate chloride ions and phosphate ions in anaerobic digestion liquids, resulting in insufficient purity of phosphoric acid products and unstable operation, making continuous processing difficult.
A packed-bed bipolar membrane electrodialysis system with both chloride and phosphorus separation capabilities was constructed. Through a multi-stage series continuous operation system, a packed-bed bipolar membrane electrodialysis device was used to achieve selective separation and efficient recovery of chloride ions and phosphate ions by utilizing a mixed resin bed of anion and cation exchange resins.
It achieves high-purity recovery of phosphorus resources, reduces chloride ion content, improves system operational stability, and enables simultaneous and efficient removal of nitrogen, phosphorus, and potassium nutrients from wastewater, reducing the burden on the aquatic ecological environment.
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Figure CN121494154B_ABST