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Method and system for treating wastewater containing pyridine and pyridine derivatives

A treatment method and technology of a treatment system, which is applied in the treatment system of wastewater containing pyridine and pyridine derivatives, wastewater treatment system, and the field of treatment of wastewater containing pyridine and pyridine derivatives, can solve the problem of no co-metabolism treatment process, etc., to achieve The effect of reducing energy consumption, reducing the amount of waste water, and saving entry costs

Active Publication Date: 2014-04-23
LIER CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the high-concentration and high-salinity wastewater containing pyridine and pyridine derivatives produced in the actual industry, there is no economical and efficient co-metabolism treatment process with industrial value.

Method used

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  • Method and system for treating wastewater containing pyridine and pyridine derivatives
  • Method and system for treating wastewater containing pyridine and pyridine derivatives
  • Method and system for treating wastewater containing pyridine and pyridine derivatives

Examples

Experimental program
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Effect test

Embodiment 1

[0049] This example contains four samples, respectively numbered 1, 2, 3 and 4, see the table below for details, the main organic components are pyridine and pyridine derivative wastewater, the salinity is about 7.5±1.0%, and the salt is chloride, the main pollution Substances pyridine and pyridine derivatives are pyridine and chloropyridine substances, the concentration is shown in the table below; after flocculation and filtration pretreatment, the salinity is adjusted to within the range of ≤3.0%, the specific actual range is shown in Table 1; nitrate is added for reflux The ratio of nitrogen element content to pyridine and pyridine derivatives is 1 to 5 times, and the specific actual ratio is shown in Table 1; the pH is adjusted within the range of 5.0 to 9.0, and the specific values ​​are shown in Table 1; co-metabolic reaction hydraulic retention The time range should be 1 to 7 days, see Table 1 for the specific actual time; the content of co-metabolized influent pyridine...

Embodiment 2

[0053] The main organic components are pyridine and pyridine derivatives wastewater, the salinity is 6.0%, the salts are chlorides, the TOC is 2500mg / L, pyridine and pyridine derivatives are pyridine and chloropyridines, the concentration is 1500mg / L, and Flocculation and filtration pretreatment, adjust the salinity to 2.0%; the ammonia nitrogen of the influent is 500, and the ratio of nitrate and nitrite nitrogen to pyridine and pyridine derivatives is 0.5:1, and the ratio of reflux is 3 times , adjust the pH to neutral, the co-metabolism residence time is 3 days, the reaction temperature is 35°C, the TOC content of the effluent is 500mg / L, and the content of pyridine and pyridine derivatives is 400mg / L; after anoxic and aerobic nitrification treatment unit , the TOC content of the effluent is 200mg / L, and the content of pyridine and pyridine derivatives is 150mg / L; after advanced treatment by activated carbon adsorption, the TOC content of the final treated effluent is reduce...

Embodiment 3

[0057] The main organic components are pyridine and pyridine derivatives wastewater, the salinity is 4.5%, the salts are chlorides, the TOC is 3300mg / L, and the pyridine and pyridine derivatives are pyridine and pyridine organic salts, etc., the concentration is 1100mg / L. Air flotation and flocculation pretreatment, adjust the salinity to 1.30%; the ammonia nitrogen of the influent is 300, and the ratio of nitrate nitrogen element to pyridine and pyridine derivatives is 0.4:1, the reflux ratio is 3 times, and the pH is adjusted To neutral, the co-metabolism residence time is 2.5 days, the reaction temperature is 30°C, the TOC content of the effluent is 600mg / L, and the content of pyridine and pyridine derivatives is 300mg / L; after anoxic and aerobic nitrification treatment units, the effluent TOC The content of pyridine and pyridine derivatives is 140mg / L, and the content of pyridine and pyridine derivatives is 130mg / L; after advanced treatment by activated carbon adsorption, t...

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Abstract

The invention discloses a wastewater treatment method, and particularly relates to a method for treating wastewater containing pyridine and pyridine derivatives. According to the method, a cometabolism substrate can be utilized in circulation; and the method comprises the following steps of (A) pre-treating wastewater with main organic matters of the pyridine and the pyridine derivatives so as to remove suspensions and solids and adjust salinity, pH value and contents of the pyridine and the pyridine derivatives; (B) by using nitrate and nitrite as the cometabolism substrate, carrying out anaerobic cometabolism treatment on the pre-treated wastewater; (C) first, carrying out aerobic nitrification treatment on the wastewater after anaerobic cometabolism treatment; and then refluxing and adding nitrate and nitrite, which are generated by aerobic nitrification reaction, to the step (B) as the cometabolism substrate; if the refluxed and added nitrate and nitrite in the step cannot satisfy requirements of the step (B), charging nitrate and nitrite for implementation; and (D) deeply treating the treated wastewater and further removing residual pollutants.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a wastewater treatment method containing pyridine and pyridine derivatives. In addition, the invention also relates to a waste water treatment system, especially a treatment system for waste water containing pyridine and pyridine derivatives. Background technique [0002] Pyridine and pyridine derivatives are a very important class of fine chemical raw materials or products, widely used in industrial solvents, medicine, pesticides, feed, dyes and other fields, known as the "chip" of heterocyclic medicines, pesticides and veterinary drugs. Because pyridine and pyridine derivatives have such important and extensive uses, they will inevitably enter a variety of industrial wastewater. [0003] Pyridine and pyridine derivatives are often odorous and irritating, and some have potential carcinogenicity, bioaccumulation or high migration. In addition, the unique chemical stability and b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/38
Inventor 全鑫张成甫朱福林范谦程柯
Owner LIER CHEM CO LTD
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