Method for removing low-concentration ammonia nitrogen in water body through biological adsorption

A low-concentration ammonia nitrogen and biological adsorption technology, applied in the field of low-concentration ammonia nitrogen, can solve the problems of large reactor, long process, difficult regeneration, etc., and achieve the effect of no secondary pollution, simple process and easy implementation

Inactive Publication Date: 2018-12-11
南京博络金环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the treatment of low-concentration ammonia nitrogen wastewater, the ion exchange method has simple process, convenient operation, and low investment, but the amount of resin or zeolite is large, regeneration is difficult, and the cost is high. The biological denitrification method is mature, but the process is long and the reactor is large. , occupies a large area, often requires additional carbon sources, consumes a lot of energy, and takes a long time. Therefore, it is urgent to develop new technologies that are more economical, faster, and more convenient to process low-concentration ammonia nitrogen.

Method used

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  • Method for removing low-concentration ammonia nitrogen in water body through biological adsorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Prepare 10 liters of copper nitrate ion solution with a concentration of 0.1M, adjust the pH of the metal ion solution to 6 with 0.1M hydrochloric acid and sodium hydroxide solution, put in 200 grams of apple peel adsorbent, stir and react for 30 minutes, and filter the adsorbent , after washing with distilled water for 3 times, put it into an oven at 60°C and dry it with hot air for 6 hours; further grind, sieve, and classify to obtain a negative copper biosorption powder product with a particle size below 200 mesh. Take 10 liters of water samples containing 50mg / L ammonia nitrogen, measure its pH value to 7.2, directly put 50 grams of the negative copper biosorption powder product prepared above, stir and react for 5 hours, filter, and measure the ammonia nitrogen content in the water samples is less than 1mg / L.

[0022] The adsorbent particles are stirred and reacted with 200 ml of dilute hydrochloric acid with a pH value of 3 for 1 hour, and an appropriate amount o...

Embodiment 2

[0024] Prepare 10 liters of nickel nitrate ion solution with a concentration of 0.1M, adjust the pH of the metal ion solution to 6 with 0.1M hydrochloric acid and sodium hydroxide solution, put in 100 grams of garlic peel adsorbent, stir and react for 300 minutes, then filter the adsorbent , after washing with distilled water for 3 times, put it into an oven at 60°C and dry it with hot air for 6 hours; further grind, sieve, and classify to obtain a negative nickel biosorption powder product with a particle size below 200 mesh. Take 10 liters of water samples containing 50mg / L ammonia nitrogen, measure its pH value to 7.2, directly put 50 grams of the negative nickel biosorption powder product prepared above, stir and react for 5 hours, filter, and measure the ammonia nitrogen content in the water samples is less than 3mg / L.

[0025] The adsorbent particles are stirred and reacted with 200 ml of dilute hydrochloric acid with a pH value of 3 for 1 hour, and an appropriate amoun...

Embodiment 3

[0027] Prepare 10 liters of silver nitrate ion solution with a concentration of 0.1M, adjust the pH of the metal ion solution to 4 with 0.1M nitric acid and sodium hydroxide solution, then drop in 300 grams of beer malt distiller's grains adsorbent, stir and react for 500 minutes, and then absorb After washing with distilled water for 3 times, put it into an oven at 60°C and dry it with hot air for 6 hours; further grind, sieve, and classify to obtain a negative silver biosorption powder product with a particle size below 200 mesh. Get 10 liters of water samples containing 50 mg / L ammonia nitrogen, measure its pH value to 7.2, directly drop into 50 grams of the negative silver biosorption powder product prepared above, stir and react for 5 hours, filter, and measure the ammonia nitrogen content in the water samples to be less than 0.5 mg / L.

[0028] The adsorbent particles are stirred and reacted with 200 ml of dilute citric acid with a pH value of 4 for 1 hour, and then filte...

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Abstract

The invention particularly relates to a method for removing low-concentration ammonia nitrogen in a water body through biological adsorption. The method comprises: preparing a biomass adsorbent material; loading metal ions on the biomass adsorbent material; and pouring the adsorbent material in wastewater or water body containing ammonia nitrogen components to immobilize the ammonia molecules in the aqueous medium onto the metal ion-loaded biomass adsorbent particle material so as to achieve the adsorption removal purification of the ammonia nitrogen components in the water body, wherein the adsorbed ammonia nitrogen molecules can be subjected to dilute acid desorption, concentration and recovery, and the adsorbent material can be repeatedly used multiple times. According to the present invention, the method has characteristics of simple operation, easy performing and no secondary pollution, the used raw and auxiliary materials are inexpensive and easy to obtain, the scale can be largeor small, the adsorbent material can be used in large-watershed water bodies, and can further be used in specially-designed reactors, and the method is the advanced technology used for treating low-concentration ammonia nitrogen water medium and having the application prospects due to the characteristics of high efficiency, economy, strong adaptability and the like.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a method for removing low-concentration ammonia nitrogen in water by biological adsorption. Background technique [0002] Due to the uncontrolled discharge of domestic wastewater and industrial wastewater and the extensive use of chemical fertilizers, the ammonia nitrogen content in natural water bodies is generally high. Ammonia nitrogen exceeding the standard will lead to eutrophication of water bodies (such as causing aquatic plants, algae and microorganisms to multiply and seriously consume dissolved oxygen in water bodies), directly affecting the benign development of the natural ecological environment. The lethal concentration of ammonia to fish is 0.2-2 mg / L, and farmers are very troubled by the eutrophication of water bodies. The state has formulated very strict control standards for the discharge of ammonia nitrogen, and various relevant enterprises have also adopted various ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/32C02F1/28
CPCB01J20/0203B01J20/0237B01J20/041B01J20/043B01J20/24B01J20/3234B01J2220/485C02F1/288
Inventor 黄凯尹铮张建峰尹衍利
Owner 南京博络金环保科技有限公司
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