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Synchronous denitrification, dephosphorization and oxygenation composite material as well as preparation method and application thereof

A technology for simultaneous denitrification, phosphorus removal, and composite materials, applied in the field of simultaneous denitrification, phosphorus removal, and oxygen-enhancing composite materials and their preparation, can solve problems such as increasing treatment procedures and costs, disturbing water ecosystems, and destroying water body stratification. Excellent denitrification, phosphorus removal and oxygenation, low production cost and high ecological safety

Inactive Publication Date: 2020-01-21
中国科学院北京综合研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aeration and oxygenation is currently a commonly used method to increase the dissolved oxygen concentration in water bodies, but it needs to run for a long time, the power cost is high, and there is a risk of causing sediment resuspension to destroy the original water body stratification
For seriously polluted water bodies, it is necessary to remove nitrogen, phosphorus and oxygen at the same time. If the three technologies are superimposed, it will not only increase the treatment procedure and cost, but also cause too much disturbance to the water ecosystem.

Method used

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  • Synchronous denitrification, dephosphorization and oxygenation composite material as well as preparation method and application thereof
  • Synchronous denitrification, dephosphorization and oxygenation composite material as well as preparation method and application thereof
  • Synchronous denitrification, dephosphorization and oxygenation composite material as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0029] The invention provides a method for preparing a synchronous denitrification, dephosphorization and oxygenation composite material, comprising the following steps:

[0030] soaking the modified matrix material in a sodium chloride solution to obtain a pretreated modified matrix material;

[0031] Mixing the pretreated modified matrix material with a modifier for modification to obtain a modified solid material;

[0032] The modified solid material is loaded with micro-nano bubbles to obtain a synchronous denitrification, dephosphorization and oxygenation composite material;

[0033] The modified matrix material is porous biomass material and / or mineral material;

[0034] The modifying agent is a metal compound, and the metal compound is one or two of lanthanum compound, aluminum compound and iron compound.

[0035] In the present invention, unless otherwise specified, the required preparation materials are commercially available products well known to those skilled in ...

Embodiment 1

[0052] Synthesize the lanthanum-modified oxygen-carrying zeolite composite material according to the following steps, and verify the effect of the material on removing nitrogen, phosphorus and increasing oxygen in the column system:

[0053] Weigh 200g of zeolite with a particle size of 1-3mm, repeatedly wash with deionized water to remove impurities on the surface of zeolite particles, and dry at 45°C; prepare 2000mL of 1.0mol / L NaCl solution; pour the dried zeolite into NaCl solution and mix well , magnetically stirred for 6 hours to carry out ion exchange; the obtained solid-liquid mixture was subjected to solid-liquid separation, the solid particles were washed with deionized water, and dried at 45°C to obtain dried zeolite;

[0054] Weigh 5g of lanthanum chloride into a 500mL Erlenmeyer flask, add 100mL of deionized water, fully dissolve in a water bath at 50°C, add 95g of dried zeolite, stir evenly, adjust the pH of the system to 10.0 with 2mol / L NaOH solution, and heat u...

Embodiment 2

[0060] In this example, the lanthanum-aluminum modified oxygen-carrying zeolite composite material was synthesized according to the following steps, and the effect of removing nitrogen, phosphorus and increasing oxygen was verified experimentally in the column system:

[0061]Weigh 200g of zeolite with a particle size of 1-3mm, repeatedly wash with deionized water to remove impurities on the surface of zeolite particles, and dry at 45°C; prepare 2000mL of 1.0mol / L NaCl solution; pour the above-mentioned dried zeolite into NaCl solution, mix Uniformly, magnetically stirred for 6 hours to carry out ion exchange; the obtained solid-liquid mixture was subjected to solid-liquid separation, the solid particles were washed with deionized water, and dried at 45°C to obtain dried zeolite; 5g of lanthanum chloride and 25g of aluminum chloride were weighed to Add 100mL deionized water to a 500mL Erlenmeyer flask, fully dissolve in a water bath at 50°C, add 70g of dried zeolite, stir well,...

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Abstract

The invention belongs to the technical field of water environment pollution treatment, and particularly relates to a synchronous denitrification, dephosphorization and oxygenation composite material as well as a preparation method and application thereof. A biomass material and / or a mineral substance material with ammonia nitrogen adsorption performance are / is used as a modified matrix material; firstly, a sodium chloride solution is adopted for soaking to increase the ammonia nitrogen absorption amount, and then a metal compound is adopted for modifying the modified matrix material, so that the modified matrix material can adsorb phosphate at the same time; and finally, the modified matrix material is loaded with micro-nano bubbles, so that the matrix material has the effects of oxygenating a water body and increasing the oxidation-reduction potential of a sediment-water interface, and the finally obtained composite material has the effect of synchronously achieving denitrification, dephosphorization and oxygenation. The composite material is simple in synthesis process, low in production cost and high in ecological safety, and has the potential of large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of water environment pollution control, in particular to a synchronous denitrification, dephosphorization, and oxygenation composite material and its preparation method and application. Background technique [0002] Nitrogen (N) and phosphorus (P) are two key nutrients that cause eutrophication of surface water bodies. When the concentration of nitrogen and phosphorus in the water body is too high, it will cause excessive growth and reproduction of algae and other plankton, decrease in water transparency, degeneration of aquatic plants, and death of fish and other organisms. The settlement and decline of algae and the decay and decomposition of aquatic plants will cause the dissolved oxygen concentration in the water body to drop rapidly, resulting in anoxic or anaerobic water body. The organic matter in the water body turns to continue to degrade under anaerobic conditions, generating reducing sulfide comp...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/14B01J20/20C02F1/28C02F7/00B01J20/30C02F101/10C02F101/16
CPCB01J20/0207B01J20/0229B01J20/0248B01J20/12B01J20/14B01J20/20C02F1/281C02F1/283C02F7/00C02F2101/105C02F2101/16Y02W10/10
Inventor 王丽静王志斌王义超姜晓明潘纲
Owner 中国科学院北京综合研究中心
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