Title:
METAL SALT AGGREGATING AGENT
Document Type and Number:
WIPO Patent Application WO/2023/181430
Kind Code:
A1
Abstract:
The total content of aluminum ions and iron ions in 1 liter of this metal salt aggregating agent is 5.7 mol or less, wherein the mole ratio (Cl/Fe) between chlorine ions and iron ions is 28 or more, the mole ratio (SO4/Al2O3) between sulfate ions and aluminum ions in terms of aluminum oxide is 0.15 or less, and the coliform removal ratio is 83% or more. By virtue of mixing polyferric sulfate and polyaluminum chloride and using same in combination, this metal salt aggregating agent exhibits higher storage stability and aggregating performance compared with the case where polyferric sulfate and polyaluminum chloride are individually used, and this metal salt aggregating agent can also be applied to a wide range of treatment waste liquids having various characteristics. This metal salt aggregating agent also has a coliform removal action.
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Inventors:
NUKAYA TEIJI (JP)
KONDO SHINYA (JP)
TOSHIMA TATSURO (JP)
KOMAI MIHO (JP)
KONDO SHINYA (JP)
TOSHIMA TATSURO (JP)
KOMAI MIHO (JP)
Application Number:
PCT/JP2022/023668
Publication Date:
September 28, 2023
Filing Date:
June 13, 2022
Export Citation:
Assignee:
NITTETSU MINING CO LTD (JP)
International Classes:
B01D21/01; C02F1/52
Foreign References:
| JP2022055836A | 2022-04-08 | |||
| JPH10272304A | 1998-10-13 | |||
| JP2013031838A | 2013-02-14 | |||
| CN112390321A | 2021-02-23 |
Other References:
TOSHIMA: "Performance Evaluation of High-Concentration Iron-Aluminum Flocculant", PROCEEDINGS OF 57TH MEETING OF JAPAN WATER WORKS ASSOCIATION, vol. 57, 22 July 2020 (2020-07-22), pages 40 - 42, XP009552909
KOMAI: "Study of Water Treatment and Wastewater Recycling Using High-Concentration Iron-Aluminum Flocculant", PROCEEDINGS OF 58TH MEETING OF JAPAN WATER WORKS ASSOCIATION, vol. 58, 30 June 2021 (2021-06-30), pages 25 - 27, XP009549326
KOMAI: "Study of Water Treatment and Wastewater Recycling Using High-Concentration Iron-Aluminum Flocculant", PROCEEDINGS OF 58TH MEETING OF JAPAN WATER WORKS ASSOCIATION, vol. 58, 30 June 2021 (2021-06-30), pages 25 - 27, XP009549326
Attorney, Agent or Firm:
MOEGI PATENT ATTORNEYS (JP)
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