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Method for effectively removing nitrogen and phosphor in eutrophic water and water treatment agent

A technology of eutrophication and water treatment agent, which is applied in the direction of flocculation/sedimentation water/sewage treatment, magnetic field/electric field water/sewage treatment, etc., can solve problems such as treatment that has not been considered, and achieve the elimination of secondary pollution, simple implementation, and elimination of bloom effect

Inactive Publication Date: 2010-12-08
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Summary
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Problems solved by technology

However, the previous work of this laboratory was aimed at the freshwater lake water during the period of cyanobacteria outbreak, and the treatment of water body during non-cyanobacteria outbreak period was not involved, and the previous work in this area also focused on the removal of cyanobacteria without considering Treatment of algal blooms in non-explosion period

Method used

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Embodiment Construction

[0033] Mix the modified fly ash and magnetite powder evenly according to the ratio of 1:1 (mass ratio), dry at 60-80°C, grind into powder, and then mix it with polyaluminum ferric chloride according to the ratio of 1:1 1 (mass ratio), made into a water treatment agent. Add the dosage of 200-250mg / L to the polluted water sample, stir rapidly for 1-3min, and after the flocs become larger, apply an external magnetic field to remove the flocs.

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Abstract

The invention discloses a method for efficiently removing nitrogen and phosphor in eutrophic water. The characters thereof are that modified fly ash and magnetite powder are mixed evenly according to the mass ratio of 1:0.5 to 2, dried under the temperature of 60-80 DEG C, and ground to powder, then the powder and polymeric aluminum ferric chloride are mixed evenly according to the mass ratio of 1:0.5 to 2, the water treatment agent is prepared, put into the polluted water, and stirred quickly, after flocs appear, external magnetic field is added, and the flocs are moved out. After the treatment by using the method of the invention, the turbidity in the water of lake reduces by 100% approximately, the total phosphor reduces by over 90%, the total nitrogen reduces by 50-80%, and COD reduces by over 90%. Nitrogen and phosphor in the water can be removed efficiently, therefore algae bloom is stopped thoroughly.

Description

technical field [0001] The invention belongs to a water treatment method, in particular to a method for effectively removing nitrogen and phosphorus in eutrophic water bodies. Background technique [0002] Human economic and social development is inseparable from water. Lakes are an important part of the natural resources needed for human social and economic development. They not only have abundant water, hydraulic and aquatic resources, but also have the function of flood storage and disaster prevention during flood seasons. However, due to people's lack of deep understanding of lake environmental protection, many lake environments have been destroyed. Among the lake pollution in our country, the most harmful to the lake should be the eutrophication of the lake. [0003] The currently recognized causes of eutrophication are mainly suitable temperature, slow water flow, and relatively sufficient nutrients such as total phosphorus and total nitrogen, which can provide a ric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/48
Inventor 季程晨王相勤柳丹许明亮李军吴跃进余增亮
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI