Method for increasing concentration of dissolved oxygen, and device for increasing concentration of dissolved oxygen

The method and device address inefficiencies in PSA devices by using a porous carrier to adsorb moisture and maintain a negative pressure state, achieving prolonged dissolved oxygen concentration increases with reduced energy consumption and mechanical stress.

WO2026141675A1PCT designated stage Publication Date: 2026-07-02NAKASHIMA CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
NAKASHIMA CO LTD
Filing Date
2025-12-26
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Conventional pressure swing adsorption (PSA) devices for increasing dissolved oxygen concentration in liquids face inefficiencies due to zeolite's high water absorption, rapid saturation, complex device configuration, high power consumption, and frequent pressure changes, leading to mechanical stress and increased costs.

Method used

A method and device using a porous carrier, such as zeolite, to adsorb moisture from air and increase dissolved oxygen concentration by maintaining a negative pressure state, eliminating the need for frequent pressure cycling and large-scale components, and utilizing alkali or alkaline earth metals like lithium for enhanced reactivity.

Benefits of technology

The method and device achieve a sustained increase in dissolved oxygen concentration for up to one day without frequent pressure adjustments, reducing energy consumption and mechanical stress, while maintaining a simpler and more efficient operation.

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Abstract

[Problem] To provide: a method for increasing the concentration of dissolved oxygen whereby the concentration of dissolved oxygen in a liquid is increased by a mechanism different from that of existing PSA devices; and a device for increasing the concentration of dissolved oxygen that increases the concentration of dissolved oxygen by using a simpler configuration than those of existing PSA devices. [Solution] A method and device characterized in that air inside a body in which a porous carrier is accommodated is moved such that moisture contained in the air is adsorbed onto the porous carrier, and the air is then discharged from the body into the liquid, thereby increasing the concentration of dissolved oxygen in the liquid.
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