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Reduction treatment method for ballast water

A treatment method and ballast water technology, applied in the direction of reduction water/sewage treatment, water/sewage treatment, natural water treatment, etc., to achieve the effect of simple reduction treatment and low environmental impact

Inactive Publication Date: 2012-09-12
NIPPON SODA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when a large amount of ballast water added with biocides is discharged, it may kill the original organisms in the discharged sea area.

Method used

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  • Reduction treatment method for ballast water
  • Reduction treatment method for ballast water
  • Reduction treatment method for ballast water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] 60 parts by weight of anhydrous sodium sulfite white powder and 40 parts by weight of sodium chloride were put into a container-fixed mixer, stirred with a paddle, and fully mixed. The mixture was compressed with a granulator at a compression pressure of 25 MPa to obtain cylindrical pellets with a diameter of 50 mm and a length of 30 mm. The breaking strength is 960N.

Embodiment 2

[0067] Prepare respectively the mixture A containing 100 parts by weight of anhydrous sodium sulfite white powder, the mixture B containing 90 parts by weight of sodium sulfite white powder and 10 parts by weight of sodium chloride, the mixture C containing 80 parts by weight of sodium sulfite white powder and 20 parts by weight of sodium chloride , mixture D containing 70 parts by weight of sodium sulfite white powder and 30 parts by weight of sodium chloride, mixture E containing 60 parts by weight of sodium sulfite white powder and 40 parts by weight of sodium chloride, containing 50 parts by weight of sodium sulfite white powder and 50 parts by weight of chloride Sodium mixture F. The mixtures A to F were compressed with a granulator at a compression pressure of 25 MPa to obtain a cylindrical solid with a diameter of 50 mm and a length of 30 mm. Table 1 shows the results of observing the tableting state of the obtained solid.

[0068] Table 1

[0069]

Mixtur...

Embodiment 3

[0073] 50 parts by weight of anhydrous sodium sulfite white powder and 50 parts by weight of sodium chloride were charged into a container-fixed mixer, stirred with a paddle, and mixed thoroughly. This mixture was tabletted with a granulator (manufactured by Mashina Corporation) at a tableting pressure of 4 MPa, 5 MPa, 25 MPa, and 30 MPa to obtain cylindrical pellets a to d with a diameter of 50 mm and a length of 30 mm. Here, the tablet compression pressure refers to the gauge pressure of the hydraulic pressure of the tablet compression machine. Table 2 shows the results of measuring the breaking strength (N) of the obtained pellets a to d using SJ-50 (manufactured by Maruhishi Scientific Machinery). It should be noted that the breaking strength (N) indicates the maximum force when the tablet is sandwiched by a flat plate and compressed to break it. in addition, Figure 4 Indicates the relationship between tableting pressure and breaking strength.

[0074] It should be not...

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Abstract

A method for reducing a ballast water with tablets or pellets of sodium sulfite, wherein the ballast water has been subjected to a bactericidal treatment with a chlorine-containing oxidizing agent or an oxygen-containing oxidizing agent in advance.

Description

technical field [0001] The present invention relates to a safer and simpler reduction treatment method for ballast water. Background technique [0002] The so-called ballast water refers to seawater loaded as a ballast mainly to ensure draft and stabilize the ship when the ship is empty. When the ship is loaded with cargo, the cargo itself acts as a ballast so that the hull is stable. However, when the ship is empty, the hull floats up and the stability decreases. Then, a large amount of seawater is loaded into the ballast water tank after unloading the cargo. [0003] Aquatic organisms are loaded together when loaded into the ship as ballast water of the ship. The loaded organisms are carried to distant regions along with the voyage of the ship. Furthermore, by discharging the ballast water, organisms are discharged to places that are not their original habitats. Alien organisms excreted in this way settle and reproduce in places that are not their original habitats, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70B63B13/00C02F1/50
CPCC02F1/4674C02F1/686C02F1/688C02F1/70C02F1/76C02F2103/008C02F2303/04C02F2303/185B63B13/00C02F1/50C02F1/72C02F2305/00
Inventor 釜土良则宫腰孝雄
Owner NIPPON SODA CO LTD
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