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Synchronous denitrification and dephosphorization adsorbent as well as preparation method and application thereof

A simultaneous denitrification and dephosphorization, adsorbent technology, applied in the direction of chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., to achieve the effect of wide sources, low price and improved effect

Active Publication Date: 2016-11-16
JINGDEZHEN CERAMIC INSTITUTE
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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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  • Synchronous denitrification and dephosphorization adsorbent as well as preparation method and application thereof
  • Synchronous denitrification and dephosphorization adsorbent as well as preparation method and application thereof
  • Synchronous denitrification and dephosphorization adsorbent as well as preparation method and application thereof

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 a synchronous denitrification and dephosphorization adsorbent as well as a preparation method and application thereof, and belongs to the field of waste water treatment. The synchronous denitrification and dephosphorization adsorbent disclosed by the invention relates to in-situ treatment of domestic sewage and eutrophication water bodies, and comprises a calcined product of magnesite stone powder and zeolite powder. The synchronous denitrification and dephosphorization adsorbent is made through the following steps of (1) crushing magnesite stone ore, performing screening, and performing high temperature calcination so as to obtain the calcined product; and crushing zeolite, grinding the crushed zeolite, and screening the ground zeolite with a 100-mesh sieve so as to obtain the zeolite powder; and (2) mixing the calcined product with the zeolite powder, performing synthesis by a hydrothermal method, then performing cooling, and performing centrifugal filtration so as to obtain a synthetic product namely the synchronous denitrification and dephosphorization adsorbent. The synchronous denitrification and dephosphorization adsorbent and the preparation method thereof disclosed by the invention can be applied to the in-situ treatment of waste water containing ammonia nitrogen and phosphate, such as the domestic sewage, chemical industry waste water and eutrophication watercourse 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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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 INSTITUTE
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