Simultaneous nitrogen and phosphorus removal modified artificial zeolite for micro-polluted water, and preparation method thereof

A technology for synchronous nitrogen and phosphorus removal and micro-polluted water, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as unsatisfactory simultaneous removal and treatment effects, and achieve Low rare earth leaching rate, improved removal rate, and the effect of increased removal rate

Inactive Publication Date: 2012-03-21
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Research by Deyi Wu et al. pointed out that although fly ash zeolite has the ability to remove nitrogen and phosphorus, and has a certain removal effect in treating high-concentration phosphorus-containing sewage, the effect needs to be further strengthened. In addition, fly ash zeolite can be directly used for low-concentration phosphorus-containing sewage The effect of sewage treatment is not ideal. Therefore, it is very necessary to properly treat fly ash zeolite, strengthen its simultaneous deamination and dephosphorization ability, determine its process parameters, expand its application range, and make it a synchronous Water purification agent for nitrogen and phosphorus removal
[0007] In summary, the existing natural zeolite and artificial zeolite products have a good effect on the removal of ammonia nitrogen and heavy metal ions in water, but the removal of phosphorus in wastewater, especially for low-concentration nitrogen- and phosphorus-containing sewage (hereinafter referred to as micropollution water) synchronous removal effect is very unsatisfactory

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) it is 0.5% rare-earth solution that the mass concentration is configured into blue;

[0026] (2) drying the fly ash zeolite with a fineness of 100 mesh at 100° C. for 4 hours;

[0027] (3) Add step (1) gained rare earth solution to the fly ash zeolite after the drying of step (2) gained, the consumption of rare earth solution is that every gram of fly ash zeolite adds 15mL rare earth solution, then under 20 ℃ of conditions, in Treat in an air-bath shaker at a constant temperature of 150r / min for 24 hours, take it out and wash it until neutral, and dry it at 100°C for 4 hours to obtain a modified artificial zeolite with simultaneous denitrification and phosphorus removal from slightly polluted water.

Embodiment 2

[0029] (1) configuring cerium into a rare earth solution with a mass concentration of 1.0%;

[0030] (2) drying the fly ash zeolite with a fineness of 200 mesh at 105° C. for 2 hours;

[0031] (3) Add step (1) gained rare earth solution to the fly ash zeolite after drying of step (2) gained, the consumption of rare earth solution is that every gram of fly ash zeolite adds 25mL rare earth solution, then under 25 ℃ of conditions, in Treat in an air-bath shaker at a constant temperature of 180r / min for 20 hours, take it out and wash it until neutral, and dry it at 105°C for 2 hours to obtain a modified artificial zeolite with simultaneous denitrification and phosphorus removal from slightly polluted water.

Embodiment 3

[0033] (1) it is the rare earth solution that mass concentration is 0.8% that blue is configured;

[0034] (2) drying the fly ash zeolite with a fineness of 150 mesh at 100° C. for 3 hours;

[0035] (3) Add step (1) gained rare earth solution to the fly ash zeolite after the drying of step (2) gained, the consumption of rare earth solution is that every gram of fly ash zeolite adds 20mL rare earth solution, then under 22 ℃ of conditions, in Treat in an air-bath shaker at a constant temperature of 160r / min for 22 hours, take it out and wash it until neutral, and dry it at 102°C for 3 hours to obtain a modified artificial zeolite with simultaneous denitrification and phosphorus removal from slightly polluted water.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a simultaneous nitrogen and phosphorus removal modified artificial zeolite for micro-polluted water, and a preparation method thereof. The preparation method comprises the following steps of 1, preparing a rare earth solution having mass concentration of 0.5 to 1.0%, 2, drying fly ash zeolite at a temperature of 100 to 105 DEG C for 2 to 4 hours, 3, adding the rare earth solution into the dried fly ash zeolite, wherein each gram of the fly ash zeolite is added with 15 to 25mL of the rare earth solution, carrying out thermostatical treatment in a gas bath shaking table at a temperature of 20 to 25 DEG C and a rate of 150 to 180r / min for 20 to 24 hours, taking out the modified zeolite, washing the modified zeolite to a pH value of 7, and drying at a temperature of 100 to 105 DEG C for 2 to 4 hours to obtain the simultaneous nitrogen and phosphorus removal modified artificial zeolite for micro-polluted water. The simultaneous nitrogen and phosphorus removal modified artificial zeolite for micro-polluted water is mainly utilized for purification of eutrophic waste water, can remove nitrogen pollutants and phosphor pollutants in sewage simultaneously, and especially, has good purification effects on low-concentration waste water containing nitrogen and phosphor.

Description

technical field [0001] The invention belongs to the technical field of environmental chemical industry, and relates to a modified artificial zeolite for synchronous denitrification and dephosphorization of slightly polluted water and a preparation method thereof. Background technique [0002] Nitrogen and phosphorus pollution are the main causes of water eutrophication, and the economical and effective control of nitrogen and phosphorus pollution has become a hot issue that needs to be solved urgently in recent years. Generally, if the biological nitrogen and phosphorus removal process is used alone, it is difficult to meet the first-level discharge standards and reuse standards that the phosphorus content in the effluent water is less than 0.5 mg / L and the ammonia nitrogen content is less than 5 mg / L. If the biological denitrification and phosphorus removal process is added on the secondary basis, the infrastructure investment will be large and the land will be large, and t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30C02F1/28C02F1/58
Inventor 谌建宇骆其金王宇罗隽
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap