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A kind of treatment method of nitrile rubber production wastewater

A technology for producing waste water and nitrile rubber, which is applied in natural water treatment, water/sewage multi-stage treatment, adsorption water/sewage treatment, etc., can solve the problems of high acrylonitrile content and long treatment time, and achieve high effluent quality, The effect of the treatment effect is remarkable

Active Publication Date: 2016-06-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is only suitable for treating wastewater with high acrylonitrile content (not suitable for treating wastewater with low acrylonitrile content), the treatment time is longer, and the content of acrylonitrile is still high after treatment

Method used

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  • A kind of treatment method of nitrile rubber production wastewater
  • A kind of treatment method of nitrile rubber production wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The pH value of wastewater 1 was adjusted to 4, and sodium persulfate and sodium sulfite were added thereto. The dosages in 1L of wastewater were 4000mg and 1500mg respectively, and the reaction time was 20min. The above wastewater enters the magnetic flocculation unit, that is, adjust the pH to 6, add magnetic powder, aluminum sulfate and polyacrylamide, and the dosage in 1L of wastewater is 120mg, 65mg and 1.2mg respectively, and stir rapidly (250r / min) for 2min. Stir at a slow speed (50r / min) for 6 minutes and let stand for 12 minutes. Put the supernatant into the activated sludge treatment unit, that is, add powdered activated carbon to the activated sludge (the weight ratio of powdered activated carbon to activated sludge is 0.12:1), and the sludge load is 0.18kgCOD / (kg sludge d), the amount of activated sludge is 3000mg / L wastewater, the dissolved oxygen in the control treatment system is 2mg / L, the temperature is 35°C, the pH value is 6.5, and the hydraulic reten...

Embodiment 2

[0044] Potassium persulfate and potassium sulfite were added to waste water 2, the dosing amount in 1L of waste water was 2000mg and 1000mg respectively, and the reaction time was 17min. The above wastewater enters the magnetic flocculation unit, that is, adjust the pH to 6, add magnetic powder, polyferric sulfate and polyacrylamide, and the dosage in 1L of wastewater is 150mg, 80mg and 1.5mg respectively, and stir rapidly (250r / min) for 3min , stirring slowly (50r / min) for 7 minutes, and standing for 13 minutes. Put the supernatant into the activated sludge treatment unit, that is, add powdered activated carbon to the activated sludge (the weight ratio of powdered activated carbon to activated sludge is 0.17:1), and the sludge load is 0.18kgCOD / (kg sludge d), the amount of activated sludge is 2800mg / L wastewater, the dissolved oxygen in the control treatment system is 4mg / L, the temperature is 25°C, the pH value is 7.5, and the hydraulic retention time is 16h. See Table 2 fo...

Embodiment 3

[0046] Add ammonium persulfate and ammonium sulfite to wastewater 3, the dosages in 1L of wastewater are 1000mg and 500mg respectively, and the reaction time is 25min. The above wastewater enters the magnetic flocculation unit, that is, adjust the pH to 6, add magnetic powder, polyferric chloride and polyacrylamide, and the dosage in 1L of wastewater is 170mg, 90mg and 1.7mg respectively, and stir rapidly (250r / min) 1min, stir slowly (50r / min) for 8min, and let stand for 14min. The supernatant after standing still enters the activated sludge treatment unit, that is, powdered activated carbon is added to the activated sludge (the weight ratio of powdered activated carbon to activated sludge is 0.15:1), and the sludge load is 0.21kgCOD / (kg sludge d), the amount of activated sludge is 3200mg / L wastewater, the dissolved oxygen in the control treatment system is 3mg / L, the temperature is 30°C, the pH value is 7.0, and the hydraulic retention time is 12h. See Table 2 for the proces...

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Abstract

The invention discloses a treatment method for nitrile rubber production wastewater. The method comprises the following steps: a, mixing the nitrile rubber production wastewater and a polymerization initiator under the conditions of polyreaction; b, performing magnetic flocculation on the wastewater which is subjected to the polyreaction; c, mixing the wastewater which is subjected to the polyreaction and activated sludge. In the water treated by the method disclosed by the method, acrylonitrile does not residue basically, the COD value is smaller than 50 mg / L, and the ammonia-nitrogen content is smaller than 5 mg / L; the water quality of outlet water is high; the treatment effect is remarkable. Moreover, the method disclosed by the invention is also particularly suitable for the treatment of the nitrile rubber production wastewater with low-content acrylonitrile.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment and relates to a treatment method for nitrile rubber production wastewater. Background technique [0002] Due to its excellent performance and wide range of applications, the demand and production of nitrile rubber have been increasing in recent years, followed by the treatment of a large number of production wastewater. This type of wastewater contains acrylonitrile, oligomers and various additives. Acrylonitrile (AN) is a colorless, bitter almond-flavored organic cyanide, which ranks fourth in the list of 52 priority toxic chemicals determined in my country. It has high toxicity and potential genotoxicity, and is an important environmental One of the harmful pollutants. Oligomers in nitrile rubber production wastewater are not only difficult to be decomposed by microorganisms, but also tend to aggregate as the environment changes. Membranes and reverse osmosis membranes. Most of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/28C02F1/72C02F103/38
Inventor 吴颖王岽郦和生魏新冯婕
Owner CHINA PETROLEUM & CHEM CORP
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