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Processing method of nitrile contained organic sewage difficult to degrade

A technology of organic wastewater and treatment methods, applied in water/sewage treatment, reduced water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as blank, inability to achieve the effect of wastewater treatment, inability to biochemical treatment, etc.

Inactive Publication Date: 2007-02-07
CHONGQING UNISPLENDOUR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this type of wastewater contains refractory organic matter, nitriles, etc., it is highly toxic and has poor biodegradability, so it cannot be directly biochemically treated
If technologies such as activated carbon adsorption, membrane separation or macroporous resin in the prior art are used for processing, only the harmful substances are partially separated, and the separated harmful substances are still unable to be discharged due to their high toxicity. Achieve the effect of wastewater treatment, and the project investment is also unacceptable
Checking domestic and foreign technical literature is basically information on the treatment of inorganic cyanide wastewater, and there is no report on the treatment of nitrile-containing organic wastewater.
In addition, Shenyang Research Institute of Chemical Industry, which is a leader in China in the application of wet catalytic oxidation technology for wastewater treatment, has not been involved in this kind of refractory nitrile-containing organic wastewater.
Therefore, the treatment of this type of wastewater is basically blank in the current prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: 1800 milliliters of said refractory nitrile-containing organic waste water (CODcr content is 25098mg / l), adjust its pH value to 1~2 with sulfuric acid, then it is the volume ratio of 1 / 1 by iron / carbon ratio The iron-carbon micro-electrolysis column is introduced into the air for stirring to make it fully react, and the reaction time is 1 to 2 hours. Use sulfuric acid to adjust the pH value of the above-mentioned waste water after the micro-electrolysis process to 1-2, and add 12 grams of ferrous sulfate to carry out redox reaction under bubbling and stirring with air. The reaction time is 1-2 hours, and then add lime to carry out For neutralization reaction, the amount of lime added is 8 grams to control the pH value of the above-mentioned wastewater to 7.5-8, and the neutralization reaction is carried out under air stirring for 10-30 minutes. After the reaction is completed, put the wastewater into a beaker and let it settle for 20-30 minutes . The clea...

Embodiment 2

[0019] Embodiment 2: 1800 milliliters of said refractory nitrile-containing organic waste water (CODcr content is 19996mg / l), adjust its pH value to 2~3 with sulfuric acid, then it is the volume ratio of 1 / 1 by iron / carbon ratio The iron-carbon micro-electrolysis column is introduced into the air for stirring to make it fully react, and the reaction time is 2 to 3 hours. Use sulfuric acid to adjust the pH value of the above-mentioned waste water after the micro-electrolysis process to 2 to 3, and add 23 grams of ferrous sulfate to carry out redox reaction under bubbling and stirring with air. The reaction time is 3 hours, and then add lime for neutralization. Reaction, the amount of lime added is 15 grams, to control the pH value of the above-mentioned waste water to be 8-8.5, neutralize the reaction under air stirring for 20-30 minutes, after the reaction is completed, put the waste water into a large beaker and let it settle for 30-50 minutes. The CODcr content of the supern...

Embodiment 3

[0020] Embodiment 3: 1800 milliliters of said refractory nitrile-containing organic waste water (CODcr content is 21163mg / 1), adjust its pH value to 3~4 with sulfuric acid, then it is the volume ratio of 1 / 1 by iron / carbon ratio The iron-carbon micro-electrolysis column was introduced into the air for stirring to make it fully react, and the reaction time was 4 hours. Use sulfuric acid to adjust the pH value of the above-mentioned waste water after the micro-electrolysis process is 3 to 4, and add 20 grams of ferrous sulfate to carry out redox reaction under bubbling and stirring with air. The reaction time is 1 to 2 hours, and then add lime to carry out For neutralization reaction, the amount of lime added is 20 grams to control the pH value of the above wastewater to 9-10, and the neutralization reaction is carried out under air stirring for 30-40 minutes. After the reaction is completed, put the wastewater into a large beaker and let it settle for 40-60 minute. The CODcr c...

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PUM

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Abstract

This invention concerns a treatment method for the organic wastewater containing hydroxyacetonitrile, phenylaminoacetonitrile, aniline, diazo value, etc. nitrile-bearing refractory organism. Said method comprises carrying out microelectrolysis under acidic condition, and then adding ferrous sulfate for redox reaction and flocculation process. The mechanism is to make nitriles and CN-NH3-N into small molecules or produce insoluble precipitate through synergetic effect of a series reactions like electrolysis, redox and aeration oxidation, and further decomposition, oxidation and reduction, and remove them through flocculation. The nitriles and hydrogen cyanide like hydroxyacetonitrile and phenylaminoacetonitrile in the water can be removed completely. Aniline can be degraded and removed. CODcr removal percentage is 35-45%.

Description

technical field [0001] The invention relates to a treatment method for refractory nitrile-containing organic wastewater, in particular to a treatment method for organic wastewater containing hydroxyacetonitrile, anilinoacetonitrile, aniline, diazo value and the like. Background technique [0002] The so-called refractory nitrile-containing organic wastewater here refers to organic wastewater containing hydroxyacetonitrile, anilinoacetonitrile, aniline, diazo value, etc. Since this type of wastewater contains refractory organic matter, nitriles, etc., it is highly toxic and has poor biodegradability, so it cannot be directly biochemically treated. If technologies such as activated carbon adsorption, membrane separation or macroporous resin in the prior art are used for processing, only the harmful substances are partially separated, and the separated harmful substances are still unable to be discharged due to their high toxicity. To achieve the effect of wastewater treatment...

Claims

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Application Information

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IPC IPC(8): C02F1/58C02F1/461C02F1/70C02F1/52
Inventor 甘永昌李宏斌周明权罗延谷
Owner CHONGQING UNISPLENDOUR CHEM
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