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Method for treating ship ballast by high-level oxidation technology based on sulphuric acid free radical

An advanced oxidation technology and ship ballast water technology, which is applied in the application fields of advanced oxidation technology and biological technology, can solve the problems of large investment and achieve the effects of low operating cost, high treatment efficiency and good effect

Inactive Publication Date: 2007-10-03
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The method of generating hydroxyl radicals requires some special equipment, and there is a disadvantage of large investment

Method used

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  • Method for treating ship ballast by high-level oxidation technology based on sulphuric acid free radical

Examples

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Effect test

Embodiment 1

[0024] After primary filtration of ballast water, the concentration of algae in it is 1.2×10 5 / mL, bacterial concentration 2.2×10 5 / mL, add persulfate in the ballast water, and generate sulfuric acid free radicals by ultraviolet light irradiation. When the concentration of sulfuric acid free radicals reaches 0.02mM / L, after 5 seconds, the algae counting method and the UV-visible spectrophotometer method are used to monitor the number of algae and bacteria, and the results show that no algae and bacteria are detected, and the killing effect up to 100%.

Embodiment 2

[0026] After primary filtration of ballast water, which contains protozoa, algae, bacteria, spores, etc., monoperoxyhydrogensulfate and metal ions are added to the ballast water, and the metal ion catalyzes monoperoxyhydrogensulfate to generate sulfuric acid free radicals. The concentration is At 0.02mM / L, after 5 seconds, protozoa, algae and bacteria were detected, and the results showed that no protozoa, algae and bacteria were detected. Bacterial culture was used to cultivate the treated ballast water. After 3 days of cultivation, no detection was found, indicating that all spores had been killed. The overall effect is a 100% kill rate.

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Abstract

A process for treating the water-ballast of ship by high-grade oxidizing technique based on free radicals of sulfuric acid in order to kill the microbes in it includes such steps as filtering, adding persulfate or hydrogen monoperoxysulfate salt, generating the free radicals of sulfuric acid by thermo-decompsoing, ultraviolet decomposing, gamma-ray radiation, or metallic ion' s catalytic decomposing, and reaction between said free radicals and water-ballast.

Description

technical field [0001] The invention relates to the application fields of advanced oxidation technology and biological technology, and relates to a method for treating ship ballast water based on advanced oxidation technology of sulfuric acid free radicals. Background technique [0002] The invasive spread of alien pests is one of the four major threats to the marine environment, and the ship's ballast water is its main source of disaster. About 90% of the goods in global trade are transported by ships, about 12 billion tons of ballast water are transferred around the world by about 90,000 ocean-going ships every year, and more than 3,000 marine organisms travel around the world with ocean-going ballast water every day. There are about 500 biological species that have been confirmed globally to be transmitted by ship's ballast water. my country's marine environment has been severely harmed by the invasion of ballast water alien organisms, and the offshore and coastal areas ...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/50C02F1/32C02F1/30C02F103/08
Inventor 刘瑀王德高宋成文李颖马龙
Owner DALIAN MARITIME UNIVERSITY
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