Denitrifying agent prepared by using river sediment as well as preparation method and application thereof

A river sediment and denitrification agent technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problem of limited usage, poor water treatment effect, and inability to meet a large amount of sediment Resource utilization and other issues to achieve the effect of increasing resource utilization and increasing the total specific surface area

Inactive Publication Date: 2018-02-13
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relevant studies have shown that the dredged black and odorous river sediment can be used as roadbeds, farmland fertilizers, modified filter materials, etc., all of which have a certain resource utilization effect, but there are also some problems in the application process: 1) Although the dredged Some of the black and smelly river sediments are used in farmland fertilizers, roadbeds and other material applications, but after all, the amount of use is limited, and the actual effect is not ideal; The use of large-scale farmland fertilizers and roadbeds cannot meet the resource utilization of a large amount of sediment; 2) The black and odorous river sediment has been modified by some means and used in the water treatment industry
However, it has a high content of pollutants, which directly leads to poor water treatment effect. In the modification process, some parameters, such as solid-liquid ratio, pH, temperature and other optimal ratio conditions are uncertain, which will lead to black odor The cost of resource utilization of river sediment is rising

Method used

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  • Denitrifying agent prepared by using river sediment as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] One embodiment of the present invention proposes a method utilizing the nitrogen removal agent prepared from river bottom mud, which comprises:

[0032] 1) Dry the river sediment at 80°C and grind it through a 150-mesh sieve; wash with HCl solution of pH=1.0, soak and grind, filter and wash with distilled water for several times, and dry at 105°C for 24 hours to obtain sediment particles

[0033] 2) calcining the sediment particles at a high temperature of 500°C for 2 hours, taking them out and cooling them to obtain a porous sediment material;

[0034] 3) Mix the porous sediment material with 0.1 mol / L sodium chloride solution, adjust the pH to 3.0, shake for 24 hours, filter, and dry to obtain a denitrification agent.

[0035] One embodiment of the present invention proposes a denitrification agent prepared from river bottom mud, which is prepared by the method in Example 1; the specific surface area of ​​the denitrification agent prepared from river bottom mud is 13....

Embodiment 2

[0038] A kind of method utilizing the denitrification agent prepared by river channel bottom mud that an embodiment of the present invention proposes, it comprises:

[0039] 1) Dry the river sediment at 80°C and grind it through a 100-mesh sieve; wash with HCl solution of pH=1.0, soak and grind, filter and wash with distilled water for several times, and dry at 105°C for 24 hours to obtain sediment particles

[0040] 2) calcining the sediment particles at a high temperature of 550°C for 4 hours, taking them out and cooling them to obtain porous sediment materials;

[0041] 3) Mix the porous sediment material with 0.4mol / L sodium sulfate solution, adjust the pH to 3.0, shake for 24 hours, filter, and dry to obtain the denitrification agent.

[0042] One embodiment of the present invention proposes a denitrification agent prepared from river bottom mud, which is prepared by the method in Example 2; the specific surface area of ​​the denitrification agent prepared from river bott...

Embodiment 1-2

[0044] Table 1 Example 1-2 Utilizes the denitrification agent prepared from river sediment to the treatment effect of nitrogen-containing wastewater

[0045]

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Abstract

The invention discloses a denitrifying agent prepared by using river sediment as well as a preparation method and application of the denitrifying agent. The method comprises the following steps: 1) drying the river sediment, grinding and sieving; then, performing acid pickling, grinding, cleaning and drying to obtain sediment particles; 2) calcining the sediment particles to obtain a porous sediment material; 3) mixing the porous sediment material with a sodium salt solution, adjusting the pH to 2.5-3.5, shaking, filtering and drying to obtain the denitrifying agent. The denitrifying agent disclosed by the invention can reduce the pressure on resource utilization of river sediment and has the advantages of easiness in operation, perfect preparation conditions, strong operability and high denitrifying efficiency.

Description

technical field [0001] The invention relates to the technical field of solid waste resource utilization and sewage treatment, in particular to a method for preparing a denitrification agent from river bottom mud. Background technique [0002] The river sediment is rich in a large amount of organic matter, nitrogen and phosphorus nutrients, and heavy metals, which are important "sources" and "sinks" that cause black and odorous rivers. The removal of pollutants in the sediment of black and odorous rivers and the treatment and disposal of sediment after dredging have always been hot issues in the solid waste and water treatment industry. Relevant studies have shown that the dredged black and odorous river sediment can be used as roadbeds, farmland fertilizers, modified filter materials, etc., all of which have a certain resource utilization effect, but there are also some problems in the application process: 1) Although the dredged Some of the black and smelly river sediments...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F1/28C02F101/16C02F101/38
Inventor 黄威姜霞陈星王坤陆莹
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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