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Compound ecological stand stabilizing agent prepared from sewage sludge as well as preparation method and application of compound ecological stand stabilizing agent

A domestic sludge and ecological sand-fixing technology, which is applied in the field of sand-fixing, can solve the problems of plant sand-fixing is difficult to play, blown sand blows away, pollutes the environment, etc., achieves good water absorption and water retention, reduces pollution, and promotes biological crusts Effect

Inactive Publication Date: 2012-10-31
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for places where the natural conditions are harsh and the quicksand is severely damaged and local rapid sand fixation is required, it is difficult for plant sand fixation to play a role in a short period of time, and it may even be completely eroded by wind and sand.
[0004] Sludge is both a pollutant and a resource, and a large amount of sludge is an environmental problem that needs to be solved urgently in our country. The sludge of existing sewage treatment plants is usually landfilled and incinerated. These treatment methods not only occupy land , the investment is large, and it will also pollute the environment. Combining sludge disposal with resource utilization is the best way out for sludge treatment

Method used

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  • Compound ecological stand stabilizing agent prepared from sewage sludge as well as preparation method and application of compound ecological stand stabilizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mix and stir polyacrylic acid with a mass ratio of 1:10 (manufactured by Guangzhou Chuanqi Chemical Co., Ltd., molecular weight 2000-5000) and sodium silicate to obtain a solid chemical agent; domestic sewage with a water content of 50% Sludge (the sludge comes from the biochemical residual sludge produced by the activated sludge method of the municipal domestic sewage plant, the main components are the microorganisms in the sewage, the organic matter adsorbed by them, and the aggregates of microbial metabolic activities) for mechanical crushing, Make the particle diameter 0.1~0.5 mm to obtain the pretreated domestic sludge; mix the solid chemical reagent with the pretreated domestic sludge according to the mass ratio of 1:100, dry, obtain the mixture, and store it; use sand-fixing Before spraying, mix the mixture and Agaric species uniformly, the mass ratio of the mixture and Agaric species is 100:1, and then dry at 95°C for 8 hours to obtain a composite ecological sand...

Embodiment 2

[0029] Mix polyacrylic acid with a mass ratio of 1:5 (manufactured by Guangzhou Chuanqi Chemical Co., Ltd., with a molecular weight of 2000-5000) and sodium aluminate and stir evenly to obtain a solid chemical agent; domestic sewage with a water content of 55% Sludge (the sludge comes from the biochemical residual sludge produced by the activated sludge method of the municipal domestic sewage plant, the main components are the microorganisms in the sewage, the organic matter adsorbed, and the aggregates formed by the products of microbial metabolic activities) for mechanical crushing , so that the particle diameter is 1-1.5 mm, to obtain the pretreated domestic sludge; mix the solid chemical reagent with the pretreated domestic sludge according to the ratio of 1:200, dry, obtain the mixture, and store it; use sand-fixing Before spraying, the mixture was mixed evenly with the algae species, the mass ratio of the mixture to the algae species was 5000:1, and then dried at 105°C fo...

Embodiment 3

[0032]Mix polyacrylic acid with a mass ratio of 1:1 (manufactured by Guangzhou Chuanqi Chemical Co., Ltd., with a molecular weight of 2000-5000) and sodium carboxymethyl cellulose and stir evenly to obtain a solid chemical agent; % of domestic sludge (the sludge comes from the biochemical residual sludge produced by the activated sludge method of urban domestic sewage plants, and its main components are microorganisms in sewage, organic matter adsorbed by them, and aggregates formed by microbial metabolic activities ) to be mechanically crushed so that the diameter of the particles is 1.5-2 mm to obtain pretreated domestic sludge; mix the solid chemical reagent with the pretreated domestic sludge according to the ratio of 1:500, and dry to obtain the mixture. Preservation; before using the sand-fixing agent, mix the mixture with chlorella algae evenly, the mass ratio of the mixture to chlorella algae is 10000:1, and then dry at 110°C for 24 hours to obtain a composite ecology m...

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Abstract

The invention belongs to the field of a sand stabilizing technology, and discloses a compound ecological stand stabilizing agent prepared from sewage sludge as well as the preparation method and application of the compound ecological stand stabilizing agent. The preparation method comprises the following steps of: uniformly mixing organic polymer with sodium salt, adding crushed and pre-processed sewage sludge, and drying to obtain a mixture; and before using the stand stabilizing agent, uniformly mixing the mixture with drought-resistant algae, so as to obtain the compound ecological stand stabilizing agent prepared from the sewage sludge. According to the preparation method, the organic polymer is polyacrylic acid, polyacrylate or starch; and the sodium salt is sodium silicate, sodium aluminate or sodium carboxymethylcellulose. The obtained sand stabilizing agent with the thickness of 0.5 to 5 cementers is uniformly paved on the surface of the sand in a desert; the stand stabilizing agent is kept in a moist state, and is properly watered for 20 to 30 days. According to the invention, the sewage sludge is subject to resourceful treatment; the obtained sand stabilizing agent integrates the chemical sand stabilizing function and the ecological stand stabilizing function; and the sands can be quickly stabilized; and the algae can be crusted later, and therefore, the sand layer has relatively high wind erosion resistance and relatively high water erosion resistance, thereby achieving good stand stabilizing effect.

Description

technical field [0001] The invention belongs to the field of sand-fixing technology, and relates to a sand-fixing agent, in particular to a composite ecological sand-fixing agent made of domestic sludge and its preparation method and application. Background technique [0002] There are three ways to fix quicksand, namely mechanical sand fixation, chemical sand fixation and plant sand fixation. Mechanical sand fixation, such as setting sand barriers, grass grids, etc., has the characteristics of quick results, but the investment is large, and it is not suitable for large-scale use; chemical sand fixation forms an impermeable film on the sand surface, and then plays the role of sand surface fixation , which is characterized by quick results and easy mechanized operations, but requires a lot of investment; plant sand fixation: mainly plant shelterbelts on the edge or hinterland of the desert or plant crusts on the sand surface to reduce the wind speed of the desert, prevent des...

Claims

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Application Information

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IPC IPC(8): C09K17/40E02D3/12
CPCY02A40/22
Inventor 江栋陈思莉刘永于年枫于年柏
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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