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Combined treatment method for ship ballast water

A technology of ship ballast water and combined treatment, applied in the field of water treatment, can solve the problems of decreasing killing rate and effect on effectiveness, and achieve the effect of less floor space, safe operation and strong sterilization ability

Inactive Publication Date: 2010-04-28
HARBIN ENG UNIV
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Problems solved by technology

Studies have shown that ultraviolet light is easily absorbed by suspended matter and yellow matter, that is, dissolved organic matter, and larger particles of suspended matter can block ultraviolet light, resulting in a decrease in the killing rate. Its effectiveness is greatly affected when it is contaminated by sediments

Method used

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  • Combined treatment method for ship ballast water
  • Combined treatment method for ship ballast water
  • Combined treatment method for ship ballast water

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Embodiment Construction

[0021] The following examples describe the present invention in more detail:

[0022] The treatment method of the ballast water of the present embodiment is realized through the following steps successively:

[0023] First of all, according to the water quality of the ballast water, a certain amount of coagulant and ironmaking furnace dust can be added to pretreat the ship’s ballast water. The coagulant is ferric chloride, and the dosage is 5-100mg / L. The dosage of iron furnace dust is 100mg / L-300mg / L, and the mixing method is mixed by static mixer.

[0024] The pretreated ballast water is filtered through a high-gradient magnetic filter. The high-gradient magnetic filter is composed of an excitation coil, a magnetic yoke iron, a cylinder with steel wool added, and a wiring device. The high-gradient magnetic separator using steel wool matrix can separate weakly magnetic fine particles with low magnetic susceptibility and small volume that cannot be separated by general magnet...

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Abstract

The invention provides a combined treatment method for ship ballast water, which comprises two steps of high gradient magnetic filtration and ultraviolet radiation treatment, wherein the step of high gradient magnetic filtration is that a high gradient magnetic filter is connected in series with an output port where a ballast pump adds ballast water to a ship ballast tank and the high gradient magnetic filter is adopted to carry out high-efficiency filtration on the ship ballast water to remove planktons and suspended particles with the size more than 50 microns; and the step of ultraviolet radiation treatment is to adopt the ultraviolet radiation to treat the ship ballast water after the step of high gradient magnetic filtration. The combined treatment method has the advantages of easy realization of automation, reliable operating altitude, moderate maintenance, small occupation area, safety, reliability, no generation of deleterious disinfection by-products, obvious effect of killing or inactivating microorganisms in the ship ballast water, high water treatment capacity, high efficiency and speed, and also has the advantages of meeting environment protection requirements, not being affected by natural temperature and removing germs, virus, protozoans and the like in the ballast water in the process that a pipeline transports the ballast water.

Description

(1) Technical field [0001] The invention relates to a water treatment method, in particular to a method for treating ship ballast water. (2) Background technology [0002] In order to sail safely at sea, a certain amount of ballast must be loaded according to the loading state and its own performance at that time, and its function is to ensure that the ship has good stability and buoyancy. Since the 1880s, ships have generally used water as ballast, which is called ship ballast water. However, ship ballast water provides favorable conditions for the spread of some species between different waters. At present, there are more than 10 billion tons of ballast water carried by ships around the world every year, and 3,000 to 4,000 species of organisms are carried in ballast water around the world every day. So far, it has been confirmed that about 500 alien biological species are transmitted by ship ballast water, and the invasion of alien organisms caused by ballast water has b...

Claims

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Application Information

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IPC IPC(8): C02F9/12C02F1/48C02F1/32C02F1/52
CPCC02F2103/008
Inventor 任芝军陈绍英邹广平施悦马桂林刘慧官涤朱丽楠陆洪宇
Owner HARBIN ENG UNIV
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