A kind of simultaneous denitrification and dephosphorization adsorbent and its preparation method and application

A technology for simultaneous denitrification and dephosphorization, and adsorbents. It is applied in chemical instruments and methods, adsorbed water/sewage treatment, and other chemical processes to achieve the effects of no secondary pollution, low price, and a wide range of sources.

Active Publication Date: 2019-02-15
JINGDEZHEN CERAMIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can solve the problem of synchronous denitrification and phosphorus removal of domestic sewage, and can treat nitrogen and phosphorus in eutrophic water in situ without causing secondary pollution to the environment

Method used

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  • A kind of simultaneous denitrification and dephosphorization adsorbent and its preparation method and application
  • A kind of simultaneous denitrification and dephosphorization adsorbent and its preparation method and application
  • A kind of simultaneous denitrification and dephosphorization adsorbent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take simulated wastewater with a phosphate concentration of 50mg / L.

[0041] A kind of simultaneous denitrification and dephosphorization adsorbent of this embodiment comprises the calcined product of magnesite powder and zeolite powder, and its preparation steps are:

[0042] (1) Crushing the magnesite ore and passing through a 100-mesh sieve, taking the under-sieve and calcining at 600°C for 4 hours to obtain a calcined product of magnesite powder; crushing and grinding the zeolite, and passing through a 100-mesh sieve to obtain zeolite powder;

[0043] (2) Step (1) The weight ratio of the calcined product to the zeolite powder is 0.5-2:1. After mixing in water, the hydrothermal method is synthesized at 200°C for 36-72 hours, then cooled, and centrifuged to obtain the synthesized product. Simultaneous nitrogen and phosphorus removal adsorbent.

[0044] The application of a kind of simultaneous denitrification and dephosphorization adsorbent in this embodiment, the st...

Embodiment 2

[0049] Application of a simultaneous denitrification and phosphorus removal adsorbent in this embodiment in domestic sewage treatment:

[0050] Take simulated domestic sewage, the concentration of phosphate is 50mg / L, and the concentration of ammonia nitrogen is 20mg / L.

[0051] A kind of simultaneous denitrification and dephosphorization adsorbent of this embodiment and its preparation method and application, its steps are:

[0052] (1) crush the magnesite ore and pass through a 100-mesh sieve, take the under-sieve and calcinate at 1000°C for 1 hour to obtain a calcined product; crush and grind the zeolite, and pass through a 100-mesh sieve to obtain zeolite powder;

[0053] (2) Step (1) The weight ratio of the calcined product to the zeolite powder is 0.5 to 2:1. After mixing, ball milling is carried out first. The ball milling time is 30min, and the speed is 300r / min; , synthesized by hydrothermal method for 36-72 hours, then cooled, centrifuged and filtered to obtain the ...

Embodiment 3

[0060] The application of a simultaneous denitrification and phosphorus removal adsorbent in this embodiment in the treatment of chemical wastewater:

[0061] Take the simulated chemical wastewater, the concentration of phosphate is 50mg / L, and the concentration of ammonia nitrogen is 20mg / L.

[0062] A kind of simultaneous denitrification and dephosphorization adsorbent of this embodiment and its preparation method and application, its steps are:

[0063] (1) crush the magnesite ore and pass through a 100-mesh sieve, take the under-sieve and calcinate at 800°C for 3 hours to obtain a calcined product; crush and grind the zeolite, and pass through a 100-mesh sieve to obtain zeolite powder;

[0064] (2) Step (1) The weight ratio of the calcined product to the zeolite powder is 1:1, and ball milling is carried out after mixing, the ball milling time is 90min, and the rotating speed is 100r / min; Synthesize by thermal method for 50h, then cool down, and centrifuge to filter to ob...

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Abstract

The invention discloses an adsorbent for simultaneous denitrification and dephosphorization, a preparation method and application thereof, and belongs to the field of wastewater treatment. The synchronous denitrification and dephosphorization adsorbent of the present invention relates to the in-situ treatment of domestic sewage and eutrophic water bodies, including the calcined product of magnesite powder and zeolite powder. The preparation steps are: (1) crushing and sieving magnesite ore, High-temperature calcination to obtain a calcined product; the zeolite is crushed and ground, and passed through a 100-mesh sieve to obtain a zeolite powder; (2) the calcined product and the zeolite powder are mixed and then synthesized by hydrothermal method, then cooled and centrifuged to obtain the synthesized product, which is the synchronous dehydration method. Nitrogen and phosphorus removal adsorbent. The invention can be applied to the in-situ treatment of wastewater containing ammonia nitrogen and phosphate, such as domestic sewage, chemical wastewater, and eutrophic river water bodies.

Description

technical field [0001] The present invention relates to the technical field of waste water treatment, in particular to a simultaneous denitrification and phosphorus removal adsorbent for in-situ treatment of ammonia nitrogen and phosphate in eutrophic river water, and a preparation method thereof, which is suitable for treating domestic sewage, and application. Background technique [0002] Excessive nitrogen and phosphorus content is the main cause of eutrophication in water bodies. Domestic sewage, especially kitchen and bathroom wastewater contains both nitrogen and phosphorus; while eutrophic water almost always contains nitrogen and phosphorus. Therefore, it is very necessary to remove nitrogen and phosphorus in this kind of water body. [0003] At present, nitrogen and phosphorus removal technologies mainly include biological nitrogen / phosphorus removal, air stripping and denitrification, chemical precipitation for nitrogen and phosphorus removal, break point chlorin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01J20/30C02F1/28C02F101/16
CPCB01J20/043B01J20/165B01J2220/42B01J2220/4806C02F1/281C02F2101/105C02F2101/16
Inventor 余荣台马湘谢志鹏汪长安
Owner JINGDEZHEN CERAMIC UNIV
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