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Method for efficient in-situ control of sludge endogenous pollution

An in-situ treatment and sludge treatment technology, which is applied in the direction of water pollutants, polluted waterways/lakes/ponds/rivers treatment, oxidation treatment of sludge, etc., can solve the problems of high difficulty in construction and implementation, and prevent water quality from deteriorating and improving Reducing environment, the effect of reducing the concentration of total phosphorus

Active Publication Date: 2018-03-06
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] Aiming at the difficulty in the implementation of existing black and odorous river construction and the problem that the previous in-situ treatment of sludge endogenous pollution technology only targets the water quality index of a single pollutant, the present invention proposes an efficient in-situ treatment of sludge endogenous pollution. Applied to black and odorous rivers to remove various pollutants in the water body and achieve the effect of effectively controlling the endogenous pollution of silt

Method used

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  • Method for efficient in-situ control of sludge endogenous pollution
  • Method for efficient in-situ control of sludge endogenous pollution

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A sample of a black and smelly river in a city in Jiangsu was collected and analyzed by the laboratory. The water quality of the black and smelly river sample was as follows: ammonia nitrogen concentration 20mg / L, DO value 0mg / L, COD value 70mg / L, total phosphorus content 1mg / L; the volume of the water body is estimated to be 10000m 3 , Water density 1kg / m 3 , The total mass of water is 10t.

[0037] The specific processing steps are as follows:

[0038] (1) Add water to dissolve the phosphorus-locking agent phoslock to prepare a wet-cast phosphorus-locking agent phoslock; in the wet-cast phosphorus-locking agent phoslock, the solid-to-liquid ratio of the phosphorus-locking agent phoslock to water is 0.8g / mL (0.85mg / The three solid-to-liquid ratios of mL, 0.90mg / mL and 0.95mg / mL can basically achieve the same effect); dry calcium peroxide to obtain dry calcium peroxide; dry aluminum modified zeolite, A dry cast aluminum-modified zeolite is prepared; the preparation method...

Embodiment 2

[0049] A sample of a eutrophic lake in a city in Jiangsu Province was collected. After laboratory analysis, the water quality of the eutrophic lake was as follows: ammonia nitrogen concentration 30mg / L, DO value 10mg / L, COD value 70mg / L, total phosphorus content 2mg / L; water volume is estimated to be 100000m 3 , Water density 1.1kg / m 3 , The total mass of water is 110t.

[0050] The specific processing steps are as follows:

[0051] (1) Add water to dissolve the phosphorus-locking agent phoslock to prepare a wet-cast phosphorus-locking agent phoslock; in the wet-cast phosphorus-locking agent phoslock, the solid-to-liquid ratio of the phosphorus-locking agent phoslock to water is 1.2g / mL (1.05mg / The three solid-to-liquid ratios of mL, 1.10mg / mL and 1.15mg / mL can basically achieve the same effect); dry calcium peroxide to obtain dry calcium peroxide; dry aluminum modified zeolite, A dry cast aluminum-modified zeolite is prepared; the preparation method of the aluminum-modified zeol...

Embodiment 3

[0061] Collecting a water blooming river in a city in Jiangsu, after laboratory analysis, the water quality of the blooming river water sample is as follows: ammonia nitrogen concentration 25mg / L, DO value 10mg / L, COD value 80mg / L, total phosphorus content 2mg / L; the water volume is calculated to be 100000m 3 , Water density 1.1kg / m 3 , The total mass of water is 110t.

[0062] The specific processing steps are as follows:

[0063] (1) Add water to dissolve the phosphorus-locking agent phoslock to prepare a wet-cast phosphorus-locking agent phoslock; in the wet-cast phosphorus-locking agent phoslock, the solid-to-liquid ratio of the phosphorus-locking agent phoslock to water is 1.0g / mL (0.98mg / The three solid-to-liquid ratios of mL, 1.01mg / mL and 1.03mg / mL can basically achieve the same effect); dry calcium peroxide to obtain dry calcium peroxide; dry aluminum modified zeolite, A dry cast aluminum-modified zeolite is prepared; the preparation method of the aluminum-modified zeol...

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Abstract

The invention discloses a method for efficient in-situ control of sludge endogenous pollution, and belongs to the field of environmental engineering water treatment. Aiming at the problem that river channel sludge endogenous pollution is difficult to efficiently control, the invention provides a method for efficient in-situ control of sludge endogenous pollution. The method basically comprises thesteps of adopting a combination of a phoslock, calcium peroxide and aluminum modified zeolite, performing sludge in-situ remediation, and efficiently restraining sludge endogenous pollution. The method is convenient for the ecological control of polluted water for the next step, and finally realizes long term improvement of water pollution conditions.

Description

Technical field [0001] This patent relates to the field of environmental engineering water treatment, and more specifically, to a method for efficiently treating sludge internal source pollution in situ. Background technique [0002] Nowadays, with the development of economy and society, pollution problems are becoming more and more serious. For example, problems such as urban black and smelly rivers, eutrophication of lake water bodies, and algae outbreaks in water bodies have caused widespread concern in society. The water quality exceeds the standard, and an important source is the internal pollution of silt. As an effective method to remove silt at the bottom of water bodies, dredging projects are widely used in water pollution control processes. However, due to the lack of planning in early urban construction, there was no space left on both sides of the urban river, which made it difficult to implement dredging projects on both sides of the black and smelly river. At the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/06C02F101/30C02F101/16
CPCC02F11/00C02F11/004C02F11/06C02F2101/105C02F2101/16C02F2101/30C02F2103/007C02F2209/08C02F2209/14C02F2209/22C02F2209/18C02F2303/02C02F1/722C02F1/281
Inventor 张毅敏孔明汪龙眠孟瑞华高月香晁建颖杨飞彭福全朱月明
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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