Method for removing hard biodegradable organic matters from sewage

An organic and difficult-to-biochemical technology, applied in chemical instruments and methods, water pollutants, oxidized water/sewage treatment, etc., to achieve the effects of reducing equipment investment and sludge disposal costs, strong processing capacity, and increasing the amount of catalyst

Inactive Publication Date: 2013-05-01
陈振选 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for removing refractory organic matter in sewage, which can remove refractory organic matter in sewage. The essential difference from the existing Fenton advanced oxidation method is that ferric hydroxide is used as a catalyst, which overcomes the need to continuously add Ferrous iron is used as a catalyst, and a part of iron-containing sludge will be produced, which needs to be treated.

Method used

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Examples

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Effect test

Embodiment 1

[0026] A method for removing refractory organic matter in sewage, the steps are as follows:

[0027] Step 1: Add ferric hydroxide as a catalyst to the sewage that needs to remove refractory organic matter. The dosage of ferric hydroxide added to the sewage is 80mmol / L, and then continue to stir. Sulfuric acid or hydrochloric acid is added to the sewage for organic matter removal, and sulfuric acid or -hydrochloric acid is added until the pH value of the sewage to be removed from biochemically difficult organic matter is adjusted to 1.6-1.7;

[0028] Step 2: Then add hydrogen peroxide to the sewage that needs to be removed from biochemically difficult organic matter. After adding hydrogen peroxide, the sewage that needs to be removed from biochemically difficult organic matter will continue to react by stirring. The ratio of the influent COD value of the sewage with biochemical organic matter removal is 4:1, and the stirring reaction time of this step is 29 hours;

[0029] Ste...

Embodiment 2

[0037] A method for removing refractory organic matter in sewage, the steps are as follows:

[0038] Step 1: Add ferric hydroxide as a catalyst to the sewage that needs to remove refractory organic matter. The dosage of ferric hydroxide added to the sewage is 40mmol / L, and then continue to stir. Sulfuric acid or hydrochloric acid is added to the sewage for removal of organic matter, and sulfuric acid or hydrochloric acid is added until the pH value of the sewage to be removed from biochemically difficult organic matter is adjusted to the range of 1.8-1.9;

[0039] Step 2: Then add hydrogen peroxide to the sewage that needs to be removed from biochemically difficult organic matter. After adding hydrogen peroxide, the sewage that needs to be removed from biochemically difficult organic matter will continue to react by stirring. The ratio of influent COD value of sewage to biochemical organic matter removal is 3.5:1, and the stirring reaction time of this step is 20 hours;

[00...

Embodiment 3

[0048]Step 1: Add ferric hydroxide as a catalyst to the sewage that needs to remove refractory organic matter. The dosage of ferric hydroxide added to the sewage is 20mmol / L, and then continue to stir. Sulfuric acid or hydrochloric acid is added to the sewage for removal of organic matter, and sulfuric acid or hydrochloric acid is added until the pH value of the sewage to be removed for refractory organic matter is adjusted to the range of 2.0-2.1;

[0049] Step 2: Then add hydrogen peroxide to the sewage that needs to be removed from biochemically difficult organic matter. After adding hydrogen peroxide, the sewage that needs to be removed from biochemically difficult organic matter will continue to react by stirring. The ratio of influent COD value of sewage to biochemical organic matter removal is 3.2:1, and the stirring reaction time of this step is 5 hours;

[0050] Step 3: Add alkali to the sewage that needs to be removed from biochemically difficult organic matter, and ...

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Abstract

The invention relates to a method for removing hard biodegradable organic matters from sewage. According to the method, the hard biodegradable organic matters can be removed from the sewage. An essential difference between the method and a present Fenton advanced oxidation process is that ferric hydroxide is taken as a catalyst, so that the defects that ferrous iron is continuously added as the catalyst and partial ferrous sludge is generated and is to be treated are overcome. The ferric hydroxide as the catalyst is recyclable and no ferrous sludge is generated. The process wholly has the advantages of simple structure, reliable running and low cost.

Description

technical field [0001] The invention relates to a method for removing refractory organic matter in sewage, in particular to a treatment method capable of mechanically removing refractory or non-biochemical organic matter. Background technique [0002] With the rapid economic development and the advancement of industrialization, more and more sewage containing difficult-to-biochemical organic matter has appeared, and it is difficult to achieve standard discharge of these sewage with general treatment methods. Research and development of sewage treatment methods containing refractory organic matter is a key problem to be solved in the field of environmental protection. [0003] At present, the Fenton advanced oxidation method is widely used in the treatment of sewage containing refractory organic matter. The Fenton advanced oxidation method uses ferrous ions to catalyze hydrogen peroxide under acidic conditions to produce free hydroxyl groups with strong oxidation activity. OH...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/30
Inventor 陈振选
Owner 陈振选
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