Composite material for removing alga-derived odorous substances in black and odorous water, and preparation method and application thereof

A composite material, black and odorous water technology, used in water pollutants, chemical instruments and methods, added substances in water/sewage treatment, etc. problem, to achieve the effects of low cost, long oxygen release cycle, and improved utilization efficiency

Inactive Publication Date: 2020-02-04
INST OF AQUATIC LIFE ACAD SINICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main means of oxygenation of water body is aeration and oxygen supply and adding oxygen-releasing materials. The aeration and oxygen supply is mainly through the aeration device to make the water body contact with the air to oxygenate. However, the aeration equipment is expensive and requires continuous operation of the equipment. , the cost is high; the oxygen-releasing material is to use the characteristics of the oxygen-releasing compound to react or decompose in water to generate oxygen to supply oxygen to the water body. The commonly used oxygen-releasing agents include calcium peroxide, magnesium peroxide and sodium peroxide, etc., but directly Putting the oxygen releasing agent into the water will cause the oxygen release rate to be fast and the pH to rise sharply, which cannot release oxygen for a long time, and will also cause secondary pollution

Method used

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  • Composite material for removing alga-derived odorous substances in black and odorous water, and preparation method and application thereof
  • Composite material for removing alga-derived odorous substances in black and odorous water, and preparation method and application thereof
  • Composite material for removing alga-derived odorous substances in black and odorous water, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] A composite material for controlling black and odorous rivers, which consists of the following raw materials in parts by weight:

[0083] Raw material parts by weight

[0084] Oxygen release agent 85

[0085] Embedding agent 15

[0086] The embedding agent is composed of bentonite, sodium alginate and polyvinyl alcohol:

[0087] Bentonite 40

[0088] Sodium Alginate 15

[0089] Polyvinyl alcohol 45;

[0090] A kind of preparation method of the composite material of black and smelly river course control, its steps are:

[0091] (1) The oxygen-releasing agent, bentonite, sodium alginate and polyvinyl alcohol in the slow-release oxygen material are mixed uniformly according to the above weight parts, and then add deionized water to stir, wherein the mass ratio of the mixture to the deionized water is 9:1, The oxygen-releasing agent is one of calcium peroxide, magnesium peroxide and sodium peroxide or mixed in any proportion of 2-3 kinds to obtain a mixture;

[0092]...

Embodiment 2-6

[0095] Raw materials and examples 2 3 4 5 6 oxygen release agent 80 78 70 67 65 Embedding agent 20 22 30 33 35 total 100 100 100 100 100

[0096] Embedding agent and examples 2 3 4 5 6 Bentonite 45 50 50 35 40 sodium alginate 15 10 15 15 10 polyvinyl alcohol 40 40 35 50 50 total 100 100 100 100 100

[0097] Its preparation steps are identical with embodiment 1.

Embodiment 7

[0099] A kind of application of composite material in the restoration of black and smelly river course treatment, its steps are:

[0100] (1) Add potassium ferrate to the black and odorous water body for pre-oxidation for 7 minutes, adjust the pH to 5 with disodium hydrogen phosphate-sodium dihydrogen phosphate buffer solution, wherein the mass volume ratio of potassium ferrate to the black and odorous water body is 1.6:1, That is, add 1.6mg potassium ferrate to 1L water;

[0101] (3) The pre-oxidation reaction was first stirred at 100r / min for 1min, then at 250r / min for 1min, and finally at 70r / min for 5min;

[0102] (4) After the pre-oxidation reaction of potassium ferrate was allowed to stand for 20 minutes, slow-release oxygen materials were added. The mass volume ratio of slow-release oxygen materials to black and odorous water was 4:1, that is, 4 g of slow-release oxygen materials were added to 1 L of water.

[0103] Beneficial effects of this implementation:

[0104] ...

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Abstract

The invention discloses a composite material for removing alga-derived odorous substances in black and odorous water, and a preparation method and an application thereof. The composite material is composed of an oxygen releasing agent and an embedding agent. The preparation method comprises the following steps: (1) uniformly mixing the oxygen releasing agent, bentonite, sodium alginate and polyvinyl alcohol according to a certain ratio, adding deionized water, and performing stirring, wherein the oxygen releasing agent is one of calcium peroxide, magnesium peroxide and sodium peroxide; (2) tabletting the obtained mixture in a tabletting machine, and drying the mixture to prepare an oxygen slow-release material for later use; (3) adding a proper amount of potassium ferrate into the black and odorous water, adjusting the pH value, stirring for a reaction, and standing for precipitation; and (4) adding a proper amount of the oxygen slow-release material into the black and odorous water. The composite material has the advantages of reasonable formula, low cost, environmental friendliness, easiness in method implementation, simplicity in operation, effectiveness in absorption and flocculation of various inorganic and organic pollutants in the black and odorous water, inhibition of harmful algae, elimination of peculiar smell, and solving of the problem of insufficient dissolved oxygen in the black and odorous water.

Description

technical field [0001] The invention belongs to the technical field of water restoration, and more specifically relates to a composite material for controlling black and odorous rivers, a preparation method of the composite material for controlling black and odorous rivers, and an application of the composite. Background technique [0002] With the rapid development of the economy, the problem of urban water environment is becoming more and more serious. Among them, the phenomenon of black and odorous urban water body has become one of the water environment problems that the public pays more attention to after the smog problem. The blackening of black and odorous water is mainly due to the high organic pollution load of the water body, which consumes a large amount of dissolved oxygen when decomposing organic pollutants, which leads to the anaerobic state of the water body and the decrease of the oxidation-reduction potential, forming a highly reducing environment. Fe in abu...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/34C02F101/38
CPCC02F1/5236C02F1/68C02F1/72C02F9/00C02F2001/007C02F2101/34C02F2101/38C02F2103/007
Inventor 周巧红夏雪吴振斌王川陈倩茹徐栋张义
Owner INST OF AQUATIC LIFE ACAD SINICA
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