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Biological degradation method of nitrogen-containing heterocyclic compound wastewater

A nitrogen heterocyclic compound, biodegradation technology, applied in chemical instruments and methods, biological water/sewage treatment, water pollutants, etc. The effect of stability, convenient process management and mild action conditions

Active Publication Date: 2015-02-11
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to provide a method for treating nitrogen-containing heterocyclic compound wastewater by using biotechnology to solve the problem that nitrogen-containing heterocyclic compound in wastewater is difficult to biodegrade and detoxify

Method used

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  • Biological degradation method of nitrogen-containing heterocyclic compound wastewater

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Embodiment 1

[0025] A biodegradation method for nitrogen-containing heterocyclic compound wastewater, comprising the steps of:

[0026] (1) Nitrite is added to nitrogen-containing heterocyclic compound (pyridine) wastewater to form mixed wastewater, which is collected in the water inlet pool 1. Among them, the carbon-nitrogen ratio (COD / NO x - ) is 5:1, the carbon in the carbon-to-nitrogen ratio comes from pyridine, and the nitrogen comes from the added nitrite.

[0027] (2) The mixed wastewater is lifted into the upflow biological aerated filter 3 through the water inlet pump 2, and the inside of the upflow biological aerated filter 3 is filled with 5-10mm particle filter material 4, and the upflow biological aerated filter 3. A perforated aeration tube 5 is arranged in the lower part for micro-aeration, and the perforated aeration tube 5 is supplied with oxygen by an external air compressor 6 .

[0028] (3) An online monitoring system is installed at the water outlet position on the to...

Embodiment 2

[0034] A biodegradation method for nitrogen-containing heterocyclic compound wastewater, comprising the steps of:

[0035] (1) Nitrate is added to wastewater containing nitrogen-containing heterocyclic compounds (pyridine, quinoline and indole) to form mixed wastewater, which is collected in inlet pool 1, where the carbon-nitrogen ratio (COD / NO x - ) is 10:1, the carbon in the carbon-to-nitrogen ratio comes from pyridine, quinoline and indole, and the nitrogen comes from the added nitrite.

[0036] (2) The mixed waste water is lifted into the upflow biological aerated filter 3 through the water inlet pump 2, and the inside of the upflow biological aerated filter 3 is filled with 20-50 mm of granular filter material 4, and the upflow biological aerated filter 3. A perforated aeration tube 5 is arranged in the lower part for micro-aeration, and the perforated aeration tube 5 is supplied with oxygen by an external air compressor 6 .

[0037] (3) An online monitoring system is i...

Embodiment 3

[0043] A biodegradation method for nitrogen-containing heterocyclic compound wastewater, comprising the steps of:

[0044] (1) Sulfate is added to nitrogen-containing heterocyclic compound (quinoline and indole) wastewater to form mixed wastewater, which is collected in the inlet pool 1, where the carbon-sulfur ratio (COD / SO 4 2- ) is 8:1, the carbon in the carbon-sulfur ratio comes from quinoline and indole, and the sulfur comes from the added sulfate.

[0045] (2) The mixed wastewater is lifted into the upflow biological aerated filter 3 through the water inlet pump 2, and the inside of the upflow biological aerated filter 3 is filled with 15-30mm particle filter material 4, and the upflow biological aerated filter 3. A perforated aeration tube 5 is arranged in the lower part for micro-aeration, and the perforated aeration tube 5 is supplied with oxygen by an external air compressor 6 .

[0046] (3) An online monitoring system is installed at the water outlet position on t...

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Abstract

The invention relates to the field of wastewater treatment, and relates to a biological degradation method of nitrogen-containing heterocyclic compound wastewater. An oxidation state compound is added in the nitrogen containing heterocyclic compound wastewater, an anaerobic environment is formed by micro aeration, and mixed electron acceptors of dissolved oxygen and the oxidation state compound simultaneously exist in the system; an upflow biological aerated filter is used as a main reaction device, an optimal degradation effect of nitrogen-containing heterocyclic compounds is achieved according to different components and concentrations of the nitrogen-containing heterocyclic compounds, the pH is controlled to 7.0-7.5, the concentration of the dissolved oxygen is controlled to 0.05-0.3 mg / L (water discharged from the upper part of the filter), and the range of the oxidation-reduction potential is controlled to 150-50 mv; under an anaerobic aeration condition, with the nitrogen-containing heterocyclic compounds as electron donors and oxygen and oxygen-containing compounds as electron acceptors, under the combined effects of micro aerobic bacteria, facultative anaerobic bacteria, aerobic / anoxic denitrifying bacteria and the like, the nitrogen-containing heterocyclic compounds are completely degraded into carbon dioxide and water.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a biodegradation method for nitrogen-containing heterocyclic compound wastewater. Background technique [0002] Nitrogen-containing heterocyclic compounds are a class of compounds with a ring structure and nitrogen elements in the ring-forming atoms. They are widely found in high-pollution industrial wastewater such as coking wastewater, dye wastewater, rubber wastewater, pharmaceutical wastewater, and pesticide wastewater. Common nitrogen-containing heterocyclic compounds mainly include pyrrole, indole, pyridine, quinoline and their derivatives. These compounds have a wide range of pollution, are difficult to degrade and are quite toxic, which will cause potential harm to the environment and human health. [0003] The removal methods of nitrogen-containing heterocyclic compounds are mainly divided into two categories: physical and chemical treatment and microbial degradation. P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/34C02F101/38
Inventor 周鑫李亚新樊蓉
Owner TAIYUAN UNIV OF TECH
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