Method and device for inactivating algae in ship ballast water through DSA anode electro-catalysis

Abstract

The invention provides a method and device for inactivating algae in ship ballast water by DSA anode electro-catalysis. According to the electro-catalysis, a DSA metal oxide coating electrode is adopted as an anode, and a carbon rod as a cathode; a titanium plate as an electrode substrate of the DSA metal oxide coating electrode, and the DSA metal oxide coating electrode is prepared through coating by adopting a thermal decomposition method. The preparation method of the DSA metal oxide coating electrode comprises the following steps of: mixing oxide organic solutions containing Ru, Ir, Sn andSb according to a certain proportion to form a coating solution; coating the coating solution on the surface of the titanium plate substrate; conducting drying for 5 min in an air blast drying box atthe temperature of 80 DEG C; conducting thermal decomposition for 5 min in a muffle furnace at the temperature of 500 DEG C; taking out a product, and cooling the product to the room temperature; completing one-time coating process; and repeatedly conducting coating for 15-20 times. The method can directly treat the ballast water; the inactivation rate of different types of algae in the ballast water can reach 99% or above; according to the method and device, an indirect oxidation effect is formed by virtue of original seawater conditions, so that the production rate of oxidative species is increased, and the inactivation efficiency of the algae is improved.

Description

technical field [0001] The invention relates to the technical field of biological treatment of algae in ship water, in particular to a method and a device for DSA anode electrocatalytic inactivation of algae in ship ballast water. Background technique [0002] The world's ocean transportation completes more than 80% of global trade and occupies the vast majority of the transportation industry, but the development of the ocean transportation industry has brought serious risks of non-native biological invasion. The problem of alien biological invasion caused by off-site discharge of ship ballast water has been concerned by the United Nations International Maritime Organization and the Marine Environment Protection Committee as early as 1973. "Guidelines for the Control and Management of Ships' Ballast Water to Reduce the Migration of Harmful Aquatic Organisms and Pathogens" adopted in 1997, and the "International Convention for the Management and Control of Ships' Ballast Wate...

AI Technical Summary

Problems solved by technology

[0004] At present, the electrochemical treatment technology of ship ballast water mainly adopts electrolysis method, which relies on the electrolysis of seawater to produce hypochlorous acid, sodium hypochlorite, etc. to oxidize and decompose the biological enzymes in microorganisms to make them invalid, or act on the cell walls of microorganisms to increase their permeability. Large, leading to cell death due to cytoplasmic efflux

However, the current efficiency of the conventional electrolysis method is low, and the lethal efficiency of cell inactivation is poor

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