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Advanced treatment device and method for aniline wastewater

A technology for advanced treatment of waste water, applied in multi-stage water treatment, water/sewage treatment, biological water/sewage treatment, etc., to achieve good purification effect, low treatment cost, and reduced treatment cost

Inactive Publication Date: 2016-11-23
SHANDONG LONGANTAI ENVIRONMENTAL PROTECTION SCI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since aniline wastewater contains organic matter that cannot be extracted by the above methods, how to solve the treatment of this part of organic matter has become the key to the advanced treatment of this kind of aniline wastewater

Method used

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  • Advanced treatment device and method for aniline wastewater

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Effect test

Embodiment 1

[0023] Wastewater containing 2,3-dichlorobenzidine from a dye intermediate production enterprise: water volume 50m 3 / h, COD is 4500mg / L, and salt content is 12%. The treatment device and method provided by the present invention are used for treatment: the hydraulic retention time of the wastewater in the membrane extraction reactor 3 is 12 hours, the extracted water enters the ozone catalytic oxidation reactor 7 and is oxidized for 60 minutes, and the concentration of ozone dosing is 200 mg / L, the circulating volume of the extract is 150m 3 / h, the hydraulic retention time of the extract in the membrane extraction reactor 3 is 4 hours, and the hydraulic retention time in the biochemical reactor 14 is 30 hours. Outlet 9 water volume 50m 3 / h, COD is 50mg / L, salt content is 12%, and the treatment cost is 5.5 yuan / m 3 .

Embodiment 2

[0025] Aniline-containing wastewater from a pesticide production enterprise: water volume 100m 3 / h, COD is 1200mg / L, and salt content is 8%. The treatment device and method provided by the present invention are used for treatment: the hydraulic retention time of the wastewater in the membrane extraction reactor 3 is 4 hours, the extracted water enters the ozone catalytic oxidation reactor 7 and is oxidized for 15 minutes, and the concentration of ozone dosing is 50 mg / L, the circulating volume of the extract is 200m 3 / h, the hydraulic retention time of the extract in the membrane extraction reactor 3 is 2 hours, and the hydraulic retention time of the extract in the biochemical reactor 14 is 10 hours. Outlet 9 water volume 100m 3 / h, COD is 42mg / L, salt content is 8%, and the treatment cost is 3.6 yuan / m 3 .

Embodiment 3

[0027] Wastewater containing aniline and chloramine in a pharmaceutical production enterprise: water volume 200m 3 / h, COD is 3500mg / L, and salt content is 10%. The treatment device and method provided by the present invention are used for treatment: the hydraulic retention time of the wastewater in the membrane extraction reactor 3 is 8 hours, the extracted water enters the ozone catalytic oxidation reactor 7 and is oxidized for 30 minutes, and the concentration of ozone dosing is 100 mg / L, the circulation volume of extract liquid is 400m 3 / h, the hydraulic retention time of the extract in the membrane extraction reactor 3 is 3 hours, and the hydraulic retention time of the extract in the biochemical reactor 14 is 20 hours. Outlet 9 water volume 200m 3 / h, COD is 45mg / L, salt content is 10%, and the treatment cost is 4.0 yuan / m 3 .

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Abstract

The invention provides an advanced treatment device and method for aniline wastewater. The device comprises a treatment device, the treatment device comprises a membrane extraction reactor, a wastewater outlet of the membrane extraction reactor is connected with a water inlet of a catalytic ozonation reactor, and an extraction liquid outlet is connected with a water inlet of a biochemical reactor; a water outlet of the biochemical reactor is connected with an extraction liquid inlet of the membrane extraction reactor; an ozone outlet of an ozone generator is connected with an ozone inlet formed in the bottom of the catalytic ozonation reactor. The device has the advantages of being good in purification effect obtained after wastewater treatment and low in treatment cost.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a device and method for advanced treatment of aniline wastewater by using a combined process of membrane extraction + biological treatment + catalytic oxidation. Background technique [0002] Aniline is an important organic chemical raw material and fine chemical intermediate. There are more than 300 kinds of chemical products and intermediates produced from it, which are widely used in dyestuff, agriculture, medicine, military industry and other industries. At present, the production process of aniline is mainly the catalytic hydrogenation of nitrobenzene, and the factories that produce and use aniline products will discharge aniline wastewater of different concentrations. Aniline is a substance with "carcinogenic, teratogenic, and mutagenic" properties. Aniline is included in the 129 environmental priority pollutants announced by the United States in 1977, and it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/26C02F1/725C02F1/78C02F3/34C02F2101/36C02F2101/38C02F2301/08
Inventor 代春龙邹宗海魏明勇
Owner SHANDONG LONGANTAI ENVIRONMENTAL PROTECTION SCI TECH CO LTD
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