Modified natural and self-making floating carrier and mesopore molecular sieve denitrogen dephosphorus material, its preparation and application

A floating carrier, denitrification and phosphorus removal technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., to achieve the effect of low price, wide source of materials, and wide distribution of raw materials

Active Publication Date: 2006-09-13
昆明顿清环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The removal of phosphorus and nitrogen in flowing water bodies such as rivers and river courses requires high-efficiency, nitrogen-removing functions, and floating materials that can maintain efficiency for a long time, but there are currently no materials that meet these requirements. to report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Take 29.03g of volcanic pumice, 4.267g of lanthanum chloride, and 139.0ml of pure water, mix and stir for about 4 hours, then place the mixture in an oven at 90°C to dry, take out the denitrification and phosphorus removal particles, and remove the nitrogen and phosphorus particles at a concentration of 1ppm Put 0.45g per 2L in the phosphorus-containing solution, and react for 24 hours to measure the phosphorus removal rate of 93.27%. 4 + -N removal rate is 55.90%.

Embodiment 2

[0031] Example 2: Take 20.10g of volcanic pumice, 1.5g and 1.41g of lanthanum chloride and cerium nitrate respectively, and 95.0ml of pure water, mix and stir for about 5 hours, then place the mixture in an oven at 200°C to dry, and take out nitrogen and phosphorus removal After granulation, put 0.45g per 2L in the phosphorus-containing solution with a concentration of 1ppm, and react for 24 hours to measure the phosphorus removal rate of 94.25%. NH 4 + -N removal rate is 52.18%.

Embodiment 3

[0032] Example 3: Take 5.0 g of expanded perlite, 0.675 g of cerium nitrate, and 47.4 ml of pure water, mix and stir for about 4 hours, then place the mixture in a 90° C. Add 0.45g per 2L of 1ppm phosphorus-containing solution, and react for 24 hours to measure the phosphorus removal rate to be 91.05%. NH was measured after 12 hours of reaction 4 + -N removal rate was 48.02%.

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PUM

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Abstract

A modified floating denitrifying-dephosphorizing material for treating the water in river and lake or the sewage is proportionally prepared from La, Ce, Al and Ca ions, light aggregate with large specific surface area, powdered coal ash, surfactant, cement, etc through mixing, impregnating in water, filtering and calcining.

Description

Technical field [0001] The invention relates to a material for denitrification and dephosphorization of river and lake water or waste water, its preparation and application. Background technique [0002] Water bodies with a total phosphorus concentration higher than 0.2 mg / L or a total nitrogen concentration higher than 0.2 mg / L are considered eutrophic water bodies. Eutrophication of water body causes excessive algal blooms, deterioration of water quality and degradation of lakes. In the past ten years, the proportion of eutrophic water bodies in my country has increased from 5.0% to about 75%, while the proportion of oligotrophic water bodies has decreased from 3.2% to 0.33%. [0003] Among the limiting factors of lake eutrophication, phosphorus control accounts for 67%, and nitrogen control accounts for 30%. Therefore, phosphorus removal is a key factor in preventing water eutrophication. Studies have shown that phosphorus in wastewate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18C02F1/28
Inventor 王家强闵良夏飞欧恩才尹雯茹箐宇
Owner 昆明顿清环保科技有限公司
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