Method and apparatus for treating manganese and iron-containing water

JP7596688B2Active Publication Date: 2024-12-10KURITA WATER INDUSTRIES LTD
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Patent Information

Application Number
JP2020161048
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2020-09-25
Publication Date
2024-12-10
Estimated Expiration
2040-09-25

AI Technical Summary

Technical Problem

Existing methods for treating water containing manganese and iron, particularly in groundwater from peat areas, face challenges in preventing the deterioration of water purification device components due to organic substances like ammonia and humic substances, leading to excessive sodium hypochlorite use and environmental issues.

Method used

A method involving the addition of hydrogen peroxide or air to raw water, followed by a biological activated carbon tower, then sodium hypochlorite, and finally filtration using manganese oxide-coated sand filters, to oxidize and remove manganese and iron effectively.

Benefits of technology

This approach reduces the need for large sodium hypochlorite amounts, minimizing chemical costs and environmental impact by oxidizing organic substances and ammonia before adding sodium hypochlorite, thus preserving the functionality of water purification devices.

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Abstract

To provide a manganese and iron-containing water treatment method and device that can sufficiently oxidize and remove manganese and iron without adding a large amount of sodium hypochlorite, when water to be treated contains an organic substance such as ammonia and humic acid in addition to manganese and iron.SOLUTION: After adding hydrogen peroxide to raw water containing manganese, iron, ammonia and organic matter, water is passed through a biological activated carbon column 3, and after adding sodium hypochlorite to the outflow water, a flocculant is added and water is passed through a filter 9 to obtain filtered water.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

  • Oxidation catalyst for removing soluble manganese and soluble iron and removing apparatus using the same

    JP1999128742A

  • Method for improving quality of ground water

    JP2002301487A

  • Method and apparatus for purifying ground water

    JP2005118664A

  • Apparatus and method for manganese catalytic oxidation

    JP2010214311A

  • Water treatment system

    JP2010234240A