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Dephosphorization and denitrification integrated material prepared based on battering method and preparation method thereof

A slurry-coating and denitrification technology, which is applied in chemical instruments and methods, methods for granulating raw materials, inorganic chemistry, etc., can solve the problems of single material, single, etc., and achieve the reduction of eutrophication, reduction of recycling costs, good The effect of social and economic benefits

Inactive Publication Date: 2013-04-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there are extensive studies on denitrification materials and phosphorus removal materials at home and abroad, but most of them are limited to a single material and a single purpose, involving the use of industrial waste, adding suitable and appropriate amount of zeolite particles and zeolite powder and supplemented by bonding. Additives such as additives, compounding a compound material suitable for use in sewage treatment processes and having the function of denitrification and phosphorus removal have not yet been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1. optimal proportioning implementation mode,

[0054] The total mass of the composite material is 212g, including 200g of 0.35cm±0.05cm zeolite particles, 1g of steel slag, 6g of fly ash, 1g of zeolite powder, 4g of binder, and 10mL of water.

[0055] Wash and soak the zeolite particles, put 2g of binder and the washed and soaked zeolite particles into the drum granulator, mix evenly, and complete the initial coating in about 15 minutes.

[0056] Put fly ash, steel slag, zeolite powder and binder 2g into the drum granulator and mix evenly. Add the zeolite particles after the initial slurry coating, and mix well. Add 10ml of water in batches to the well-mixed gelling material, and granulate for about 30 minutes. When the room temperature is higher than 5°C, cover the formed sphere with a sack for 24 hours, and sprinkle water for maintenance after 6 hours; sprinkle water to keep the sphere moist , The curing period is about 2 days.

Embodiment 2

[0057] Example 2. The total mass of the composite material is 161.5g, including 150g of 0.35±0.05cm zeolite particles, 1g of steel slag, 6g of fly ash, 1g of zeolite powder, 3.5g of binder, and 10mL of water.

[0058] Wash and soak the zeolite particles, put 1.5g of binder and the washed and soaked zeolite particles into the drum granulator, mix evenly, and complete the initial coating in about 15 minutes.

[0059] Put fly ash, steel slag, zeolite powder and binder 2g into the drum granulator and mix evenly. Add the zeolite particles after the initial slurry coating, and mix well. Add 10ml of water in batches to the well-mixed cementitious material, and granulate for about 30 minutes. When the room temperature is higher than 5°C, cover the formed sphere with straw mats for 24 hours, and sprinkle water for maintenance after 8 hours; water to maintain The sphere is moist, and the curing period is about 3 days.

Embodiment 3

[0060]Example 3. The total mass of the composite material is 313g, including 300g of 0.35±0.05cm zeolite particles, 1g of steel slag, 6g of fly ash, 1g of zeolite powder, 5g of binder, and 10mL of water.

[0061] Wash and soak the zeolite particles, put 3g of binder and the washed and soaked zeolite particles into the drum granulator, mix evenly, and complete the initial coating in about 15 minutes.

[0062] Put fly ash, steel slag, zeolite powder and binder 2g into the drum granulator and mix evenly. Add the zeolite particles after the initial slurry coating, and mix well. Add 10ml of water in batches to the uniformly mixed gelling material, and granulate for about 30 minutes.

[0063] The effect after the implementation of the optimal ratio: the static test results show that at 25°C, the theoretical saturated adsorption capacity of the integrated material for nitrogen and phosphorus removal is 5.77 mg / g for ammonia nitrogen, and 3.35 mg / g for phosphate . The initial ammon...

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Abstract

A dephosphorization and denitrification integrated material prepared based on a battering method mainly consists of the following materials according to mass ratio: 2 to 4 percent of fly ash, 0.3 to 0.7 percent of steel slag, 0.3 to 0.7 percent of zeolite powder, 1 to 3 percent of binder, and the balance of zeolite particles. Aiming at problems existing in the current sewage and wastewater treatment, the invention provides a composite material with dephosphorization and denitrification functions simultaneously, and a preparation method thereof; and compared with the existing sewage and wastewater treatment materials, the novel composite material not only can protect the environment and realize the reclamation of wastes, but also can obtain good social and economic benefits.

Description

technical field [0001] The invention relates to a composite water treatment material for phosphorus and nitrogen removal in the technical field of water pollution prevention and control and a preparation method thereof. Background technique [0002] The eutrophication of water bodies is a worldwide problem. A large number of research results and facts show that nitrogen and phosphorus are the main factors leading to eutrophication of water bodies. At the same time, phosphorus is also an indispensable nutrient element for life, and it is a resource that is difficult to regenerate and is increasingly exhausted. [0003] At present, the removal methods of nitrogen and phosphorus in sewage mainly include biological and chemical methods. The biological process is complex and the effluent stability is poor; although the chemical process is effective, the denitrification and phosphorus removal agents used are mostly industrial products such as lime, aluminum salt, iron salt, ferro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01J20/32B01J2/00C02F1/28
Inventor 王世和刘焱朱丹张维周军卓运红
Owner SOUTHEAST UNIV
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