Modified zeolite ammonia nitrogen adsorbent and application and regeneration method thereof

A technology of modified zeolite and adsorbent, which is applied in chemical instruments and methods, separation methods, filter regeneration, etc. It can solve the problems of ammonia nitrogen removal agent that has not yet been seen, high environmental conditions, and slow growth of nitrifying bacteria. To achieve the effect of abundant reserves, good adsorption effect and stable water quality

Active Publication Date: 2012-04-25
HUNAN HUAYI MUNICIPAL ENG DESIGN
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The problems with this type of method are that the growth of nitrifying bacteria is slow, the reaction time is long, the requirements for environmental conditions are

Method used

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  • Modified zeolite ammonia nitrogen adsorbent and application and regeneration method thereof
  • Modified zeolite ammonia nitrogen adsorbent and application and regeneration method thereof
  • Modified zeolite ammonia nitrogen adsorbent and application and regeneration method thereof

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preparation example Construction

[0027] The preparation method of modified zeolite ammonia nitrogen adsorbent of the present invention is to carry out according to the following operation steps:

[0028] (1) First, the natural zeolite is crushed and ground, then passed through a 20-40 mesh sieve, soaked in sulfuric acid with a volume concentration of 2%-10% for 24 hours, washed until the pH is 6.5-7.5, and placed at 120°C-150 Steam at ℃ for 16-24h, then dry at 105℃ and cool to room temperature for later use;

[0029] (2) by CuSO 4 ·5H 2 The weight ratio of O and the above-mentioned treated zeolite is 1:3 and takes CuSO 4 ·5H 2 Dissolve O in ultrapure water, then mix with zeolite, stir evenly, react at 650°C for 24 hours, cool to room temperature and wash off unloaded surface particles, until the solution is washed out to a pH of 6.5-7.5, then Dry at a temperature of 100°C-150°C to obtain the finished modified zeolite ammonia nitrogen adsorbent.

[0030] Use the product modified zeolite ammonia nitrogen a...

Embodiment 1

[0035] (1) First crush and grind the natural zeolite, then pass through a 30-mesh sieve, soak in sulfuric acid with a volume concentration of 5% for 24 hours, wash until the pH is 7.0, steam at 120°C for 24 hours, and then dry at 105°C After cooling to 25°C, set aside;

[0036] (2) Weigh 100g CuSO 4 ·5H 2 Dissolve O in ultrapure water, mix with 300g of spare zeolite after the above treatment, stir evenly, react at 650°C for 24h, cool to 25°C and wash off unloaded surface particles until the pH of the eluting solution is 7.0 , and then dried at a temperature of 150°C to obtain a modified zeolite ammonia nitrogen adsorbent;

[0037] (3) Choose plexiglass as the adsorption column, add 3m modified zeolite ammonia nitrogen adsorbent in the column, enter the waste water from the smelter into the sump through the grid, adjust the pH to 9 with sodium hydroxide, and pump it into the adsorption In the column, after treatment, it enters the clean water pool for reuse. Through monitor...

Embodiment 2

[0040] (1) First crush and grind the natural zeolite, then pass through a 20-mesh sieve, soak in sulfuric acid with a volume concentration of 10% for 24 hours, wash until the pH is 6.5, steam at 150°C for 16 hours, and then dry at 105°C After cooling to 25°C, set aside;

[0041] (2) Weigh 100g CuSO 4 ·5H 2 O is dissolved in ultrapure water, mixed with 300g of spare zeolite that has been treated and dried before, stirred evenly, reacted at 650°C for 24h, cooled to room temperature at 25°C, washed off the unloaded surface particles, and the pH of the washed solution When it is 7.0, it is then dried at 120°C to obtain a modified zeolite ammonia nitrogen adsorbent.

[0042] (3) Choose plexiglass as the adsorption column, add 3m modified zeolite ammonia nitrogen adsorbent in the column, enter the waste water retrieved from the garbage dump into the sump through the grid, adjust the pH to 9 with sodium hydroxide, and pump it into the adsorption column In the column, after treatme...

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Abstract

The invention discloses a modified zeolite ammonia nitrogen adsorbent and an application and regeneration method thereof; the preparation process of the adsorbent comprises the following steps: crushing and grinding natural zeolites, soaking the zeolites in acids, mixing the zeolites with an aqueous solution of CuSO4.5H2O, performing a high temperature reaction, cooling, cleaning, and drying to obtain the finished product. The application and regeneration method of the adsorbent comprises the following steps: selecting organic glass as an adsorption column, adding the adsorbent into the column, adjusting the PH of nitrogen-containing waste water to be weak alkaline, injecting the waste water into the adsorption column through a peristaltic pump for an adsorption reaction; backwashing the adsorption column after adsorption for a while, when the adsorption is completed, cleaning the adsorbent by hydrochloric acid or sulfuric acid, recovering the cleaning solution, performing evaporation and crystallization to obtain ammonium chloride or ammonium sulfate crystals. The cleaned adsorbent can be reused. The modified zeolite ammonia nitrogen adsorbent of the invention has a large adsorption capacity, and good adsorption effect, and is simple and convenient for regeneration; when the adsorbent is used for the treatment of nitrogen-containing waste water, the process is simple and the effluent is stable.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a modified zeolite ammonia nitrogen adsorbent and its use and regeneration method. Background technique [0002] Ammonia nitrogen can cause eutrophication of water bodies, produce toxic effects on aquatic organisms, increase the difficulty of water supply treatment, and thus affect human health. At present, the ammonia nitrogen pollution in surface water and groundwater in our country is increasing continuously, which destroys the normal transfer and transformation of nitrogen in the natural ecosystem, causing serious impact and potential harm to the water environment and human health. At present, the commonly used treatment methods for ammonia nitrogen wastewater mainly include stripping method, break point chlorination method, chemical precipitation method, biological denitrification method and ion exchange method. [0003] The air stripping method is to use the diffe...

Claims

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Application Information

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IPC IPC(8): B01J20/16B01J20/34C02F1/28C02F1/58C02F101/16
Inventor 宋海农杨崎峰韦艳玲周永信朱琦陈永利许开绍
Owner HUNAN HUAYI MUNICIPAL ENG DESIGN
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