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Pyridine wastewater purification treatment method

A wastewater purification and treatment method technology, applied in the direction of water/sewage treatment, anaerobic digestion treatment, chemical instruments and methods, etc., can solve the problems of high cost, poor purification effect, poor degradation performance, etc., and achieve improved oxidation efficiency , reduce the negative impact, the effect of easy engineering

Inactive Publication Date: 2019-02-22
江苏南大华兴环保科技股份公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the problems of strong toxicity of pyridine and its derivatives, poor degradation performance, poor purification effect, high cost and easy secondary pollution in the existing pyridine wastewater treatment technology, the present invention provides a pyridine wastewater purification The treatment method can effectively improve the removal rate of pyridine pollutants in water, avoid secondary pollution, and the required cost is low

Method used

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  • Pyridine wastewater purification treatment method

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Effect test

Embodiment 1

[0035] A kind of wastewater containing pyridine and 3-picoline, pH value is 6.5, light yellow, COD content is 3000mg / L, total nitrogen is 400mg / L, pyridine content is 200mg / L, 3-picoline content is 20mg / L.

[0036] The specific processing steps are as follows:

[0037](1) Denitrification and oxidation: Based on the quality of wastewater, add 3% potassium nitrate, adjust the C / N ratio of wastewater to 5, add sodium carbonate, adjust the pH to 6.5, stir and mix, and the wastewater enters the activated sludge The denitrification device, the amount of sludge added to each liter of wastewater is 5g, stay for 16h, and denitrification treatment solution is obtained after the end; the water quality test and analysis of the obtained denitrification treatment solution, the measured COD is 2100mg / L, pyridine 50mg / L , 3-picoline 15mg / L.

[0038] (2) Fenton oxidation: add sodium carbonate to adjust the pH of the denitrification treatment solution to be 3, the quality of the denitrificat...

Embodiment 2

[0044] A kind of wastewater containing pyridine, pH value is 6.5, light yellow, COD content is 3000mg / L, total nitrogen is 400mg / L, pyridine content is 200mg / L, 3-picoline content is 20mg / L. .

[0045] The specific processing steps are as follows:

[0046] (1) Denitrification and oxidation: Based on the quality of wastewater, add 1.5% sodium nitrate, adjust the C / N ratio of wastewater to 10, add sulfuric acid, adjust the pH to 7.5, stir and mix, and the wastewater enters the anaerobic sludge The denitrification device, the amount of sludge added to each liter of wastewater is 20g, stay for 24h, after the end of the denitrification treatment solution; the water quality test and analysis of the denitrification treatment solution obtained, the measured COD is 1800mg / L, pyridine 45mg / L , 3-picoline 10mg / L.

[0047] (2) Fenton oxidation: adjust the pH of the denitrification treatment solution to be 5, take the denitrification effluent quality as a benchmark, add 0.6% hydrogen per...

Embodiment 3

[0053] A kind of wastewater containing pyridine and 3-picoline, pH value is 6.5, light yellow, COD content is 3000mg / L, total nitrogen is 400mg / L, pyridine content is 200mg / L, 3-picoline content is 20mg / L.

[0054] The specific processing steps are as follows:

[0055] (1) Denitrification and oxidation: Based on the quality of wastewater, add 2.3% calcium nitrate, adjust the C / N ratio of wastewater to 8, add sodium carbonate, adjust the pH to 7, stir and mix, and the wastewater enters the denitrifying bacteria agent ( denitrification) anaerobic sludge denitrification device, the amount of sludge added per liter of waste water is 12g and stays for 20h, and the denitrification treatment solution is obtained after the end; the water quality test and analysis of the obtained denitrification treatment solution shows that the COD is 2000mg / L, pyridine 55mg / L, 3-picoline 18mg / L.

[0056] (2) Fenton oxidation: adjust the pH of the denitrification treatment solution to 4, take th...

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Abstract

The invention discloses a pyridine wastewater purification treatment method, and belongs to the field of wastewater purification. The method includes denitrification oxidation, Fenton oxidation and coagulation sedimentation. The denitrification oxidation is used as a pre-purification step before the Fenton oxidation, and denitrification oxidation reaction is utilized to improve the treatment efficiency of the pyridine wastewater in water in the subsequent Fenton oxidation. The flocculation sediment is arranged after the Fenton oxidation to serve as a post-purification step, and the flocculation precipitation reaction is utilized to solve the problem of water body color reversion caused by iron ions remaining in the Fenton oxidation step, further remove pyridines and other nitrogenous organic compound remaining in the water body, reduce the chemical oxygen demand of the water body and improve the purification effect of the water body. By means of the treatment method, the pyridine wastewater can be effectively purified, and the emission standard can be met stably.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and more specifically relates to a method for purifying pyridine wastewater. Background technique [0002] The water resource crisis caused by water environment pollution has become an important restrictive factor for my country's social and economic development. In recent years, refractory organic pollutants have gradually become one of the main factors of water pollution, posing a serious threat to the environment and human health. Among many organic pollutants, pyridine and its derivatives have gradually attracted the attention of researchers due to their wide application, high toxicity, refractory and harmful characteristics. [0003] Pyridine is a representative six-membered heterocyclic compound, which can be used industrially as a denaturant, dyeing aid, and to synthesize a series of products (including medicines, disinfectants, dyes, food seasonings, adhesives, explosives, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/38
CPCC02F9/00C02F1/56C02F1/5236C02F3/28C02F1/725C02F1/66C02F2001/007C02F2101/38
Inventor 赵选英刘君君杨峰唐伟杰
Owner 江苏南大华兴环保科技股份公司
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