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Biological treatment method and application for efficient removal of 2,4,6-trichlorophenol in wastewater

A technology of trichlorophenol and biological treatment, which is applied in biological water/sewage treatment, water treatment parameter control, special compound water treatment, etc. It can solve the problems of difficult removal and waste water reuse, so as to maintain sludge activity and reduce Energy consumption, the effect of a wide range of sources

Active Publication Date: 2022-07-19
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a biological treatment method and application for highly efficient removal of 2,4,6-trichlorophenol in wastewater. By adding methanol to activated sludge, the difficult removal of 2,4,6-trichlorophenol and methanol are simultaneously solved. Difficult technical problems in wastewater reuse

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  • Biological treatment method and application for efficient removal of 2,4,6-trichlorophenol in wastewater
  • Biological treatment method and application for efficient removal of 2,4,6-trichlorophenol in wastewater
  • Biological treatment method and application for efficient removal of 2,4,6-trichlorophenol in wastewater

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Embodiment 1

[0035] The biological treatment method for efficiently removing 2,4,6-trichlorophenol in wastewater of the present embodiment, the steps are as follows:

[0036] (1) The sludge from the return tank was aerated for 24 hours from the municipal sewage treatment plant to remove the organic matter in it, and was acclimated by adding methanol to restore its activity. The mass ratio of methanol to sludge was 1:15;

[0037] (2) The activated sludge was inoculated into the SBR reactor, the concentration of the inoculated sludge was 3000 mg / L, and the intermittent aeration mode was used;

[0038] (3) The operation mode of the SBR reactor is as follows:

[0039] Water inlet stage: peristaltic pump water inlet, stirring, and running for 15 minutes;

[0040] Operation stage: intermittent aeration, the ratio of aeration to non-aeration time is 2 h vs 2 h, stirring during aeration, stop stirring during non-aeration, the last non-aeration time is 1 h 30 min, a total of 7 hours of operation 30...

Embodiment 2

[0048] The biological treatment method for efficiently removing 2,4,6-trichlorophenol in wastewater of the present embodiment, the steps are as follows:

[0049] (1) The sludge in the return tank was aerated for 24 hours from the municipal sewage treatment plant to remove the organic matter in it, and it was acclimated by adding methanol to restore its activity. The mass ratio of methanol to sludge was 1:10;

[0050] (2) The activated sludge was inoculated into the SBR reactor, the concentration of the inoculated sludge was 3500 mg / L, and the intermittent aeration mode was used;

[0051] (3) The operation mode of the SBR reactor is as follows:

[0052] Water inlet stage: peristaltic pump water inlet, stirring, and running for 15 minutes;

[0053] Operation stage: intermittent aeration, the ratio of aeration to non-aeration time is 2 h vs 2 h, stirring during aeration, stop stirring during non-aeration, the last non-aeration time is 1 h 30 min, a total of 7 hours of operation ...

Embodiment 3

[0060] The biological treatment method for efficiently removing 2,4,6-trichlorophenol in wastewater of the present embodiment, the steps are as follows:

[0061] (1) Take the sludge from the municipal sewage treatment plant and aerate it for 24 hours to remove the organic matter in it, and restore its activity by adding methanol to domesticate it. The mass ratio of methanol to sludge is 1:20;

[0062] (2) The activated sludge was inoculated into the SBR reactor, the concentration of the inoculated sludge was 3300 mg / L, and the intermittent aeration mode was used;

[0063] (3) The operation mode of the SBR reactor is as follows:

[0064] Water inlet stage: peristaltic pump water inlet, stirring, and running for 15 minutes;

[0065] Operation stage: intermittent aeration, the ratio of aeration to non-aeration time is 2 h vs 2 h, stirring during aeration, stop stirring during non-aeration, the last non-aeration time is 1 h 30 min, a total of 7 hours of operation 30 minutes;

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Abstract

The invention belongs to the field of activated sludge treatment, in particular to a biological treatment method and application for efficiently removing 2,4,6-trichlorophenol in wastewater. The steps are as follows: after aeration of the sludge in the concentration tank of the municipal sewage treatment plant for 24 hours, methanol is added for domestication and culture to obtain the reactivated sludge; the obtained reactivated sludge is inoculated into the SBR reactor; the SBR reactor is set up The parameters and reaction conditions of the water inlet stage, operation stage and drainage stage of the SBR reactor; the three stages of SBR reactor operation are cycled every day, and the concentration of COD and 2,4,6‑trichlorophenol in the influent and effluent of each stage is monitored , to control the pH. In the present invention, the activated sludge is domesticated by gradually increasing the influent 2,4,6-trichlorophenol, which avoids the sludge collapse caused by the impact of high-concentration refractory pollutants, and is more conducive to maintaining the sludge performance. Compared with the simple aerobic or anaerobic treatment method, the present application has higher advantages.

Description

technical field [0001] The invention belongs to the field of activated sludge treatment, and relates to the treatment of industrial wastewater, in particular to a biological treatment method and application for efficiently removing 2,4,6-trichlorophenol in wastewater. Background technique [0002] Chlorophenols are widely used in industries such as pesticides, fungicides, dyes and wood preservatives. 2,4,6-Trichlorophenol is widely present in industrial wastewater discharged from industries such as the production of dye intermediates, fungicides and preservatives. The concentration of organic pollutants in industrial wastewater reaches tens or even hundreds of mg / L. If it is discharged into the ecosystem without effective treatment, it will cause great harm to the ecosystem. 2,4,6-Trichlorophenol seriously inhibits the activity of sludge, resulting in low efficiency and poor effect of the activated sludge process to degrade and remove 2,4,6-trichlorophenol, and the sludge f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F101/34C02F101/36
CPCC02F3/301C02F2101/36C02F2101/345C02F2209/08C02F2305/06
Inventor 李玉赵建国李刚强王兰金宝丹张珂张宏忠
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY