Drinking water emergency treatment method for water source sudden ammonia nitrogen pollution

An emergency treatment and sudden-onset technology, applied in the field of water treatment, can solve the problems of high disinfection by-products and poor removal effect of ammonia nitrogen pollution, etc., and achieve the effect of high operation efficiency, good removal effect and simple operation

Active Publication Date: 2014-11-26
哈尔滨工业大学高新技术开发总公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the conventional treatment process of the water supply plant has poor removal effect on sudden ammonia nitrogen pollution of raw water and high disinfection by-products, the present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0012] Specific embodiment one: the water treatment method for removing ammonia nitrogen pollutants in raw water in this embodiment is carried out according to the following method:

[0013] 1. Add powdered activated carbon to deionized water and boil, then wash with deionized water until the water becomes clear to remove ash and impurities on the surface of activated carbon, then place the washed powdered activated carbon in a drying oven to dry.

[0014] 2. Prepare 100ml of 30% NaOH solution, mix 50g of pretreated activated carbon with the solution, shake the mixture on a shaker at room temperature for 24 hours, wash it with deionized water until it is neutral, dry it and activate it in a muffle furnace for 2 hours to complete the powder Modification of activated carbon.

[0015] 3. Press ClO - : NH 4 + =1:3 molar ratio: add sodium hypochlorite solution into water and combine with ozone to remove ammonia nitrogen pollution in water, the flow rate of ozone is 4mg / min, and ...

specific Embodiment approach 2

[0018] Specific embodiment two: the water treatment method for removing ammonia nitrogen pollutants in raw water in this embodiment is carried out according to the following method:

[0019] 1. Add powdered activated carbon to deionized water and boil, then wash with deionized water until the water becomes clear to remove ash and impurities on the surface of activated carbon, then place the washed powdered activated carbon in a drying oven to dry.

[0020] 2. Configure 30wt.% NaOH solution, mix a small amount of pretreated activated carbon with the solution, shake the mixture on a shaker at room temperature for 24 hours, wash it with deionized water to neutrality, dry it and activate it in a muffle furnace for 2 hours to achieve powder Modification of activated carbon.

[0021] 3. Press ClO - : NH 4 + = 1:4 molar ratio Add sodium hypochlorite solution into water and combine with ozone to remove ammonia nitrogen pollution in water, the flow rate of ozone is 4mg / min, and the ...

specific Embodiment approach 3

[0024] Specific embodiment three: the water treatment method for removing ammonia nitrogen pollutants in raw water in this embodiment is carried out according to the following method:

[0025] 1. Add powdered activated carbon to deionized water and boil, then wash with deionized water until the water becomes clear to remove ash and impurities on the surface of activated carbon, then place the washed powdered activated carbon in a drying oven to dry.

[0026] 2. Configure 30wt.% NaOH solution, mix a small amount of pretreated activated carbon with the solution, shake the mixture on a shaker at room temperature for 24 hours, wash it with deionized water to neutrality, dry it and activate it in a muffle furnace for 2 hours to achieve powder Modification of activated carbon.

[0027] 3. Press ClO - : NH 4 + = 1:5 molar ratio Add sodium hypochlorite solution into water and combine with ozone to remove ammonia nitrogen pollution in water, the flow rate of ozone is 4mg / min, and th...

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Abstract

The invention relates to a water treatment method, particularly a drinking water emergency treatment method for water source sudden ammonia nitrogen pollution. The method aims to solve the problems of poor removal effect and high disinfection byproducts in the raw water sudden ammonia nitrogen pollution in the water supply plant conventional treatment technique. The method comprises the following steps: a. mixing pretreated activated carbon with a NaOH solution, oscillating the mixture on an oscillating table at room temperature for 24-26 hours, washing with deionized water to a neutral state, drying, and activating in a muffle furnace, thereby modifying the powder activated carbon; b. adding a sodium hypochlorite solution in water according to the ClO<->:NH4<+> mole ratio of 1:(3-5) to be combined with ozone so as to remove the ammonia nitrogen pollution in the water; and c. adding the NaOH-modified powder activated carbon into the raw water subjected to ozone oxidation, and carrying out dechlorination. After the micropolluted raw water is treated by the method, the maximum ammonia nitrogen removal ratio can reach 89.28%. The treatment method is simple to operate, and has the advantages of high operating efficiency, high work reliability and wide popularization prospects.

Description

technical field [0001] The invention relates to a water treatment method, which is mainly used for emergency treatment of drinking water, in particular to a method of adding sodium hypochlorite to raw water polluted by ammonia nitrogen to cooperate with ozone oxidation and modified powder activated carbon adsorption to improve the removal rate of ammonia nitrogen pollutants . Background technique [0002] The content of ammonia nitrogen in water directly determines the water quality. In recent years, accidents of ammonia nitrogen pollution have occurred frequently in various parts of my country, especially in southern lakes and reservoirs, which poses new challenges to the water treatment system. "Drinking Water Hygienic Standards" (GB 5749-2006) strictly stipulates the ammonia nitrogen index, and the ammonia nitrogen limit is 0.5mg / L, but the traditional ozone method not only has a poor removal effect, but the removal rate is generally lower than 10% , and high disinfectio...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 潘云皓刘冬梅曹文阳崔福义王洪涛马闯李增李运东杨富中张琛玥刘博王兆春谈国君张正德许亚群宗静徐永维戴琦
Owner 哈尔滨工业大学高新技术开发总公司
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