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Method for treating ballast water by using singlet oxygen

A singlet oxygen and ballast water technology, which is applied in the direction of oxidized water/sewage treatment, can solve the problems of ultraviolet disinfection limited by light source and low heat treatment efficiency, and achieve the effect of strong reactivity, moderate price and stable chemical properties

Active Publication Date: 2016-01-13
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems in the existing ballast water treatment methods, such as low heat treatment efficiency, limited light source for ultraviolet disinfection, halogenated by-products produced by liquid chlorine and ozone oxidation, etc.

Method used

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  • Method for treating ballast water by using singlet oxygen
  • Method for treating ballast water by using singlet oxygen

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specific Embodiment approach 1

[0017] Specific Embodiment 1: This embodiment is a method for treating ballast water with singlet oxygen, which is realized through the following steps: adding the catalyst and the oxidant to the ballast water in a molar ratio of 1:(1-10) , control the concentration of the oxidizing agent in the ballast water to 20-1000mg / L, the reaction time is 30-120min, and the water is kept in a stirring state during the treatment process, that is, the treatment of the ballast water with singlet oxygen is completed; wherein the catalyst is acetone acid; the oxidizing agent is a peroxide.

[0018] The principle of a method for removing algae using singlet oxygen in this embodiment is as follows: first, pyruvic acid catalyzes peroxide (peroxymonosulfate, percarbonate) to produce a diepoxy intermediate; then, the diepoxide intermediate The body further reacts with peroxide to produce singlet oxygen ( 1 o 2 ) and pyruvic acid, while the diepoxy intermediates also self-decompose to produce si...

specific Embodiment approach 2

[0020] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the peroxide is a mixture of one or more of persulfate and percarbonate in any ratio. Others are the same as in the first embodiment.

[0021] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the persulfate is sodium persulfate (NaHSO 5 ), potassium persulfate (KHSO 5 ), ammonium persulfate (NH 4 HSO 5 ), calcium persulfate (Ca(HSO 5 ) 2 ), magnesium persulfate (Mg(HSO 5 ) 2 ) in one or several mixtures in any ratio. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Specific embodiment three: this embodiment is different from specific embodiment one: percarbonate is sodium percarbonate (Na 2 CO 4 ), potassium percarbonate (K 2 CO 4 ) in one or two mixtures in any ratio. Others are the same as in the first embodiment.

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Abstract

The invention discloses a method for treating ballast water by using singlet oxygen, and relates to a ballast water treatment method. The method for treating ballast water by using singlet oxygen comprises the following steps: adding a catalyst pyruvic acid and an oxidant peroxide (peroxymonosulfate and percarbonate) into ballast water, stirring, and enabling to react, thereby treating the ballast water. Due to adoption of the method, the peroxide is catalyzed by pyruvic acid to generate a bi-epoxy midbody, the bi-epoxy midbody is further reacted with the peroxide to generate singlet oxygen and pyruvic acid, the peroxide is continuously catalyzed by the generated pyruvic acid, then a circulated catalysis function is achieved in reaction, and the generated high-activity singlet oxygen can rapidly act on organic pollutants, algae, microorganisms and the like in ballast water to oxidize organic pollutants, kill alga cells and inactivate microorganisms, so that the purpose of removing pollution can be achieved. The method for treating ballast water has the characteristics that the treatment efficiency is high, no toxic or harmful byproducts can be generated, the catalyst pyruvic acid and the oxidant peroxide are environmentally friendly, safe and free of toxic or side effect, and the reaction is slightly affected by water body conditions.

Description

technical field [0001] The invention relates to a method for treating ballast water, in particular to a method for treating ballast water with singlet oxygen. Background technique [0002] Ballast water is the water body that is pumped into the cabin to ensure the ship has a certain draft and adjust the balance of the hull so that the navigation is safe and stable, and then discharged when loading. The volume of ballast water is generally 40% of the cargo transportation volume of the ship. about. With the rapid development of the world economy and global trade, more than 10,000 marine microorganisms, animals and plants (including: bacteria, viruses, algae, protozoa, molluscs and fish, etc.) roam the world with the ballast water of freighters every day , being taken "where they don't belong". Ballast water itself is harmless, but when a ship migrates and discharges tens of thousands of tons of seawater to a remote sea area where there may be no natural enemies, the biologic...

Claims

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Application Information

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IPC IPC(8): C02F1/72
Inventor 庞素艳江进杨悦袁立鹏
Owner HARBIN UNIV OF SCI & TECH
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