Ultraviolet light catalyzing and strong oxidizing treatment method of ship ballast water

A technology for ship ballast water and treatment methods, which is applied in the field of ultraviolet photocatalytic strong oxidation ship ballast water treatment technology, can solve the problems of seawater secondary pollution, incomplete sterilization, poor treatment effect, etc., and achieves wide application range, Small negative impact, effect of improving water quality

Active Publication Date: 2010-07-21
SHANGHAI GREENSUN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] What is currently needed can overcome the shortcomings of the existing sea-going ship ballast water treatment technology, such as large equipment volume, high energy consumption, incomplete sterilization, secondary pollution to seawater, poor treatment effect, etc., and invent a brand new one. The high-efficiency, low-energy-consumption ballast water treatment process can meet the requirements of the International Maritime Organization, namely: safe, reliable, effective, environmentally acceptable and reasonable in cost

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  • Ultraviolet light catalyzing and strong oxidizing treatment method of ship ballast water

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The ballast water taken from the Yangshan Deepwater Port was first filtered through a filter with a pore size of 50 μm, and the concentration of algae with a diameter of less than 50 μm was 2.37×10 3 / ml, the bacterial concentration was 8.74×10 2 / ml, through a low-pressure mercury lamp with a dominant emission wavelength of 254nm and a thin-film TiO prepared on an industrially pure titanium sheet as a supporting substrate 2After 3 minutes of treatment in the photocatalytic strong oxidation reactor of the photocatalyst, the number of algae and bacteria was detected by the algae counting method and the ultraviolet-visible spectrometer method, and the algae and bacteria with a diameter of less than 50 μm were not detected, and the killing rate was 100% %, the ballast water treated by the method of the present invention can reach the index stipulated by the International Maritime Organization (IMO).

Embodiment 2

[0042] After the ballast water taken from Xiangshan Port in Ningbo is filtered through a filter with a pore size of 50 μm, the concentration of aquatic organisms with a diameter of less than 50 μm such as protozoa, algae, bacteria, and spores exceeds 3.5×10 4 / ml, and the COD of the ballast water is 0.62mg / L, through the low-pressure mercury lamp with the main emission wavelength of 185nm and the film-type TiO2 prepared on the support substrate of sponge-like porous ceramics 2 After 5 minutes of treatment in the photocatalytic strong oxidation reactor of the photocatalyst, protozoa, algae and bacteria were detected, and the results were not detected, and the killing rate reached 100%. No bacteria with a thickness of 50 μm has been detected, which proves that the method of the present invention can completely kill the spores; meanwhile, the COD of ballasted seawater is reduced to 0.11 mg / L, and the removal rate reaches more than 82%. The ballast water treated by the method of t...

Embodiment 3

[0044] After the ballast water taken from Xiangshan Port in Ningbo was filtered through a filter with a pore size of 50 μm, the concentration of aquatic organisms with a diameter of less than 50 μm such as protozoa, algae, bacteria, and spores exceeded 3.5×10 4 / ml, and the COD of the ballast water is 0.62mg / L, the film-type TiO2 prepared on the low-pressure mercury lamp with the emission dominant wavelength of 254nm and the glass ball with a diameter of 5mm as the supporting substrate 2 After 3 minutes of treatment in the photocatalytic strong oxidation reactor of the photocatalyst, protozoa, algae and bacteria were detected, and the results were not detected, and the killing rate reached 100%. The ballast water treated by the 3-day bacterial culture method was less than No bacteria with a thickness of 50 μm has been detected, which proves that the method of the present invention can completely kill the spores; meanwhile, the COD of ballasted seawater is reduced to 0.08 mg / L, ...

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Abstract

The invention discloses an ultraviolet light catalyzing and strong oxidizing treatment method of ship ballast water, which comprises the following steps: (1) firstly, coarsely filtering seawater by a coarse filter; (2) then finely filtering the seawater which is coarsely filtered in the step (1) through a 50 mum filter; (3) carrying out germicidal treatment on the seawater which is finely filtered in the step (2) through an ultraviolet light catalytic combination treater; (4) filling the seawater after undergoing the germicidal treatment in the step (3) to a ballast tank to become ballast water; (5) after finishing filling the ballast water, back flushing the coarse filter and the 50 mum filter by the seawater; and (6) before discharging the ballast water, treating the ballast water by the ultraviolet light catalytic combination treater so as to be discharged later. The method has more rapid reaction speed and can effectively kill protozoa, algae, bacteria, spores and the like which are smaller than 50 mum, and the germicidal time is less than 5 seconds; and the method does not use any chemicals basically, and has less adverse impact on the ecology environment.

Description

technical field [0001] The invention belongs to the technical field of ballast water treatment in the shipping process of ships, and in particular relates to a process method for treating ballast water of ships by ultraviolet photocatalytic strong oxidation. Background technique [0002] With the rapid development of the global shipping economy, there are more and more ships, the volume is getting bigger and bigger, and the speed of the ships is getting faster and faster. Ballast water is an important guarantee for the safe navigation of ships. It is estimated that the ballast water carried by ships around the world is about 12 billion tons per year, and it is still increasing year by year with the development of the shipping industry. It exists in the ballast water of ships every day. There are more than 4,500 species of organisms that travel around the world on ships, and even after months of voyages, many species of bacteria, plants and animals can still survive in the ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/32C02F1/72
CPCC02F2103/008
Inventor 张丽董丽华
Owner SHANGHAI GREENSUN ENVIRONMENTAL PROTECTION TECH CO LTD
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