Strengthening method for removing ammonia nitrogen and organic matters in rear activated carbon filter for ultrafiltration

A technology of activated carbon filter and organic matter, which is applied in the direction of chemical instruments and methods, water pollutants, water/sewage multi-stage treatment, etc., can solve the problem of limited ability of activated carbon filter to remove ammonia nitrogen and organic matter, so as to solve microbial risks and improve Mass transfer conditions, the effect of enhancing the removal effect

Inactive Publication Date: 2014-01-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is to solve the problem that the activated carbon filter has limited ability to remove ammonia nitrogen and organic matter, and provides an enhanced method for removing ammonia nitrogen and organic matter by a post-ultrafiltration activated carbon filter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0028] Specific implementation mode one: a kind of post-ultrafiltration activated carbon filter of the present embodiment removes the strengthening method of ammonia nitrogen and organic matter according to the following steps:

[0029] 1. Set up a pre-treatment unit in front of the activated carbon filter: use the coagulation and sedimentation process to treat the source water, and remove the particulate matter before effluent;

[0030] 2. Change the activated carbon filter to an upward-flowing activated carbon filter: When the concentration of ammonia nitrogen in the effluent in step 1 is less than 1.5mg / L and the potassium permanganate index is less than 3mg / L, first change the activated carbon filter to an upward-flowing activated carbon filter , and then the effluent treated in step 1 enters the upward-flowing activated carbon filter for treatment for 10 minutes to 30 minutes, and the effluent is effluent after the treatment is completed. Wherein, when the step 1 effluent...

specific Embodiment approach 2

[0032] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step two, the effluent treated in step one enters the upstream activated carbon filter for processing for 20 minutes, and the water is discharged after the treatment is completed; wherein each of the upstream activated carbon filters is controlled Parameters: The filtration rate of the upward-flowing activated carbon filter is 10m / h~12m / h; the thickness of the activated carbon layer of the upward-flowing activated carbon filter is 2.5m; the backwashing intensity of the upward-flowing activated carbon filter is 15L / s m 2 ; In step 3, the effluent treated in step 2 enters the ultrafiltration unit for filtration for 60 minutes, and then backwashes the ultrafiltration membrane for 1 minute; the ultrafiltration unit is an internal pressure ultrafiltration membrane module or submerged ultrafiltration Membrane module; the transmembrane pressure of the internal pressure ultrafi...

specific Embodiment approach 3

[0033] Specific implementation mode three: a kind of post-ultrafiltration activated carbon filter tank of the present embodiment removes ammonia nitrogen and the strengthening method of organic matter according to the following steps:

[0034] 1. Set up a pre-treatment unit in front of the activated carbon filter: use the coagulation and sedimentation process to treat the source water, and remove the particulate matter before effluent;

[0035] 2. Set up an ozone unit before the activated carbon filter: when the concentration of ammonia nitrogen in the effluent of step 1 is less than 1.5mg / L and the potassium permanganate index is greater than 3mg / L, add 1mg / L to 2mg / L to the effluent treated in step 1 The amount of L is passed through the ozone treatment for 10 minutes to 30 minutes and then the water is discharged;

[0036] 3. Change the activated carbon filter to an upward activated carbon filter: first change the activated carbon filter to an upward activated carbon filter...

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Abstract

The invention discloses a strengthening method for removing ammonia nitrogen and organic matters in a rear activated carbon filter for ultrafiltration, particularly discloses a strengthening method for removing ammonia nitrogen and organic matters in the rear activated carbon filter for ultrafiltration in drinking water treatment, and aims to solve the problem that the capacity of the activated carbon filter for removing the ammonia nitrogen and the organic matters is limited. The strengthening method comprises the steps of firstly, arranging a coagulation sedimentation unit in front of an activated carbon filter, and arranging an ultrafiltration unit at the rear of the activated carbon filter; then, adopting different strengthening measures according to different concentrations of ammonia nitrogen and organic matters in inlet water of the activated carbon filter. The method comprises the following concrete steps: (1) when the concentration of the ammonia nitrogen is less than 1.5mg / L and the index of potassium permanganate is less than 3mg / L, changing the activated carbon filter to be in an upward flowing way; (2) when the index of the potassium permanganate is greater than 3mg / L, additionally arranging an ozone unit in front of the activated carbon filter in the step (1); (3) when the concentration of the ammonia nitrogen is greater than 1.5mg / L, aerating at the bottom of the activated carbon filter in the step (1); (4) when the concentration of the ammonia nitrogen is greater than 1.5mg / L and the concentration of the permanganate is greater than 3mg / L, combining the step (2) and the step (3).

Description

technical field [0001] The invention relates to a process for purifying source water polluted by high-concentration ammonia nitrogen and organic matter, in particular to an enhanced method for removing ammonia nitrogen and organic matter by a post-installed ultrafiltration activated carbon filter. Background technique [0002] At present, there are different degrees of ammonia nitrogen and organic matter pollution in drinking water sources in most parts of my country. Traditional water treatment processes have low efficiency in removing ammonia nitrogen, and the removal effect on organic matter is not ideal. "(GB5749-2006). Activated carbon filter is currently a measure to deal with ammonia nitrogen and organic pollution, but it can only improve the removal effect of organic matter to a certain extent; and limited by the concentration of dissolved oxygen in water, it cannot deal with high concentrations of ammonia nitrogen (ammonia nitrogen concentration> 1.5mg / L ); at th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F1/44C02F101/16C02F101/30
Inventor 邵森林梁恒瞿芳术李凯余华荣李圭白
Owner HARBIN INST OF TECH
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