Denitrification dephosphorization antibacterial composite water treatment material used for water reclamation

A technology for nitrogen and phosphorus removal and water treatment, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. Simultaneous denitrification, phosphorus removal and antibacterial problems, to achieve the effect of denitrification and phosphorus removal with obvious antibacterial effect, accelerated internal diffusion speed, and convenient regeneration

Inactive Publication Date: 2010-06-02
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current preparation processes simply consider improving the ability of zeolite to remove a certain pollutant in reclaimed water, while ignoring

Method used

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  • Denitrification dephosphorization antibacterial composite water treatment material used for water reclamation
  • Denitrification dephosphorization antibacterial composite water treatment material used for water reclamation
  • Denitrification dephosphorization antibacterial composite water treatment material used for water reclamation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Preparation of Antibacterial Composite Water Treatment Material for Nitrogen and Phosphorus Removal

[0020] The preparation method comprises the following steps:

[0021] (1) Weigh 5g of sodium chloride, dissolve in 250ml deionized water, and stir to dissolve; Weigh 5g of natural clinoptilolite that has been dried, pulverized, and crossed a 150-mesh sieve, and slowly and evenly added to the aqueous sodium chloride solution. Put it into a temperature-controlled shaking box at a speed of 200 revolutions per minute and vibrate at room temperature for 2 hours, wash the natural clinoptilolite soaked in salt with deionized water until the pH is neutral, filter and dehydrate, and put it into an electric heating constant temperature blast Dry in a drying oven at 105°C;

[0022] (2) Put the sample dried in (1) into a crucible, take it out after calcining in a temperature-controlled muffle furnace at 500° C. for 0.5 hour, and put it into a vacuum drying oven to cool;

[0023] ...

Embodiment 2

[0027] Nitrogen removal effect of composite water treatment materials in reclaimed water treatment

[0028] Take by weighing 1g of the composite water treatment material described in Example 1, add it to 250mL of regenerated water with an ammonia nitrogen concentration of 20mg / L, that is, the dosage of the composite water treatment material is 4g / L, and stir for 2h. Take 1 g of the corresponding natural clinoptilolite, add it into 250 mL of regenerated water with an ammonia nitrogen concentration of 20 mg / L, and stir for 2 h. The result is as figure 1 As shown, under the condition of the same dosage, the denitrification rate of the composite water treatment material reaches 92%. The denitrification rate of natural clinoptilolite is only 52%.

Embodiment 3

[0030] Phosphorus removal effect of composite water treatment materials in reclaimed water treatment

[0031] Take by weighing 0.2 g of the composite water treatment material described in Example 1, add it to 250 mL of regenerated water with a phosphorus concentration of 5 mg / L, that is, the dosage of the composite water treatment material is 0.8 g / L, and stir for 3 hours, as a comparison , Weigh 0.2g of the corresponding natural clinoptilolite, add it into 250mL of regenerated water with an ammonia nitrogen concentration of 5mg / L, and stir for 3h. The result is as figure 2As shown, under the condition of the same dosage, the phosphorus removal rate of the composite water treatment material reaches 89%. The phosphorus removal rate of natural clinoptilolite is only 5%.

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PUM

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Abstract

The invention discloses a denitrification dephosphorization antibacterial composite water treatment material used for water reclamation, belonging to the field of environmental protection. In the invention, zeolite is modified by a method combining high temperature activation and chemical treatment; natural clinoptilolite is treated by a NaCl solution for the first time to improve ammonia nitrogen removal capacity and reaction speed of the zeolite; then the zeolite is treated by lanthanum chloride used as a loading agent, wherein lanthanum is attached to the surface of the zeolite in a form of lanthanum oxide and is electrically absorbed to phosphate radical ions to generate lanthanum phosphate complex for dephosphorization; and finally, by utilizing ion-exchanging property of zeolite particles and loading inorganic antibacterial ion Ag+ inside pore canals of the zeolite by adopting a liquid phase ion-exchange method, silver ions and oxygen molecules generate ROS during bacteriostasis, and enzyme in a respiratory chain is inhibited by generated super-oxidation activators, thereby achieving the purpose of bacteriostasis. The invention takes the natural clinoptilolite as an absorbent, has the advantages of rich raw materials, low price, convenient reclamation, low cost on water treatment, and obvious denitrification dephosphorization antibacterial effect in the water reclamation.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to the preparation of a synchronous denitrification and dephosphorization antibacterial composite water treatment material and its application in regenerated water treatment. Background technique [0002] With the development of human society and economy and the acceleration of urbanization, urban water resources are becoming increasingly tense. However, limited water resources are seriously threatened by water pollution. In order to avoid further deepening of the water crisis, advanced treatment of sewage must be carried out to make reclaimed water a stable urban water source. The amount of urban sewage is large and relatively stable. The non-aqueous substances in sewage are much less than those in seawater. Most of the components in sewage are reusable water. Therefore, today's sewage recycling is feasible to protect limited water resources. It is an effective measure to use...

Claims

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Application Information

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IPC IPC(8): B01J20/16C02F1/28C02F1/50C02F1/58
Inventor 林海江乐勇郭丽丽赵志英
Owner UNIV OF SCI & TECH BEIJING
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