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Denitrifying phosphorus-removing carrier and use

A denitrification and phosphorus removal, carrier technology, applied in silicate, inorganic chemistry, adsorbed water/sewage treatment, etc., can solve the problem that the concentration range of denitrification and phosphorus removal is not indicated, the nitrogen and phosphorus removal effect is difficult to stabilize, and the patent disclosure is insufficient. and other problems, to achieve good economic benefits, low cost of raw materials, and improve the effect of contact surfaces

Inactive Publication Date: 2008-02-13
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has good denitrification and phosphorus removal effects when treating eutrophic water bodies, and the solid-liquid separation is easy. Although the method is to prepare the adsorbent into pellets, the adsorbent itself is a kind of sludge, and its adsorption performance will decrease. It changes with the change of sludge characteristics, so its removal effect on nitrogen and phosphorus is difficult to be stable
[0010] Although the above-mentioned nitrogen and phosphorus removal materials (or adsorbents, or carriers) for removing nitrogen and phosphorus in sewage have high removal rates for nitrogen and phosphorus, their respective preparation processes are complicated.
In addition, none of the existing patents indicated the appropriate concentration ranges for denitrification and phosphorus removal, and the disclosures of the patents were not sufficient, making it difficult for those skilled in the art to implement their inventions according to the instructions and achieve the claimed inventive effects

Method used

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  • Denitrifying phosphorus-removing carrier and use
  • Denitrifying phosphorus-removing carrier and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] A nitrogen and phosphorus removal carrier, the components by weight are as follows:

[0067] Based on the dry basis of the finished product as 200kg:

[0068] Clinoptilolite powder (90% through 100 mesh exchange capacity above 100cmol(+) / kg) 100kg

[0069] Gypsum powder (90% over 100 mesh) 70kg

[0070] Industrial salt (particle size 2-3cm) 10kg

[0071] Ordinary Portland cement (label 425) 20kg

[0072] Pine sawdust 2kg

[0073] Add 200kg of clean water.

[0074] Prepare as follows:

[0075] 1) According to the formula, mix clinoptilolite powder and gypsum powder with a powder mixer for 5-10 minutes to obtain material 1;

[0076] 2) Under stirring conditions, add industrial salt, ordinary portland cement, and pine sawdust to material 1, and continue mixing, subject to the fact that there is no sign of unmixed material with the naked eye, to obtain material 2;

[0077] 3) Spray the material 2 obtained in step 2) with clear water under stirring, and observe the pl...

Embodiment 2

[0083] According to the preparation method of the embodiment, the present embodiment is another optimized formula wherein, the components by weight are as follows:

[0084] Clinoptilolite powder (90% through 100 mesh exchange capacity above 100cmol(+) / kg) 110kg

[0085] Gypsum powder (90% over 100 mesh) 60kg

[0086] Industrial salt (particle size 2-3cm) 10kg

[0087] Ordinary Portland cement (label 325) 20kg

[0088] Pine sawdust 2kg

[0089] Add 150kg of clean water.

[0090] The denitrification and phosphorus removal carrier prepared in this example has a first-order reaction rate constant of 0.0197h in the denitrification process -1 , the half-life is 35h; the first-order reaction rate constant of phosphorus removal process is 0.3395h -1 , with a half-life of 2h.

Embodiment 3

[0092]The present embodiment is the best implementation mode of the present invention, according to the preparation method of embodiment, its formula by weight component is as follows:

[0093] Based on the dry basis of the finished product as 200kg:

[0094] Clinoptilolite powder (90% through 100 mesh exchange capacity above 100cmol(+) / kg) 120kg

[0095] Gypsum powder (90% over 100 mesh) 50kg

[0096] Industrial salt particle size (2-3cm) 10kg

[0097] Ordinary Portland cement (label 525) 20kg

[0098] Pine sawdust 2kg

[0099] Add 100kg of clean water.

[0100] The denitrification and phosphorus removal carrier prepared in this example has a first-order reaction rate constant of 0.0205h in the denitrification process -1 , the half-life is 34h; the first-order reaction rate constant of phosphorus removal process is 0.2191h -1 , with a half-life of 3h.

[0101] According to the technical solutions and examples provided by the present invention, the nitrogen and phosphor...

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Abstract

The present invention belongs to the water treatment technical field and particularly relates to the preparation and use of a nitrogen and phosphorus removal carrier. The carrier of the present invention can provide the water environmental protection by the nitrogen and phosphorus removal treatment towards industrial wastewater and living sewage, which contain ammoniacal nitrogen and inorganic phosphorus, and towards pollution source or water in non-point source pollution. The nitrogen and phosphorus removal carrier of the present invention is characterized in that when a dry basis of the finished product is 200kg, and calculating according to weights, the components are as followings: 100kg to 120kg clinoptilolite powder, 90 percent of the exchange capacity over 100 meshes of which is more than 100cmol (plus) / kg; 50kg to 70kg land plaster, 90 percent of which is more than 100 meshes; 10kg industrial salt, the granular size of which is 2cm to 3 cm; 20kg common portland cement (labels of which is from 325 to 525); 2kg sawdust of pine tree; 100kg to 200kg complementary water. The present invention also discloses the preparation method and the application of the carrier.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular, the invention relates to the preparation and application of a nitrogen and phosphorus removal carrier. The carrier of the invention can protect the water environment by performing denitrification and phosphorus removal treatment on industrial wastewater containing ammoniacal nitrogen and inorganic phosphorus, domestic sewage and pollution sources (water) in non-point source pollution. technical background [0002] The eutrophication process of rivers, lakes and reservoirs is mainly caused by the input sewage containing nitrogen and phosphorus nutrients (mainly ammoniacal nitrogen and inorganic phosphorus) that exceed the self-purification capacity of these water bodies. A very important task in the field of water environment protection is to adopt effective technologies to remove nitrogen and phosphorus-containing water sources to a certain extent before entering the above-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/10B01J20/02B01J20/04C02F1/28
Inventor 朱端卫刘小宁周文兵耿明建廖水姣袁巧霞杨特武华玉妹汪明霞赵建伟郝蓉
Owner HUAZHONG AGRI UNIV
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