Disposal technique of nitrobenzene-containing sewage

A technology of nitrobenzene and treatment process, which is applied in the direction of flotation water/sewage treatment, neutralized water/sewage treatment, reduced water/sewage treatment, etc. It can solve problems that have not yet occurred and achieve the effect of accelerating the degradation rate

Active Publication Date: 2009-08-26
DASMART ENVIRONMENTAL SCI & TECH (BEIJING) CO LTD
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However, breakthrough technologies with significant economic and environmental advantages are yet to emerge

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  • Disposal technique of nitrobenzene-containing sewage

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[0020] The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.

[0021] The main process steps are as figure 1 As shown, some operations are not shown in the accompanying drawings, because the following embodiments describe the present invention from the level of actual operation, and the external form of the description is not exactly the same as the description in the summary of the invention, but it is easy to understand. The substantive content is completely consistent, and the operation steps are described in detail below.

[0022] (1) In order to avoid the mixing of sewage containing nitrobenzene and other sewage not containing nitrobenzene, and from an economical point of view, the upstream sewage has been treated in a "pollution-pollution" split.

[0023] a. Separate collection and management of sewage containing nitrobenzene. According to the pH value required by the catalytic reduction pr...

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Abstract

The invention provides a disposal technique of nitrobenzene-containing sewage, which has remarkable economic and environmental benefits and comprises the steps: (1) the nitrobenzene-containing sewage is collected and treated by catalytic reduction, so that sewage containing phenyl amines can be obtained; (2) the sewage containing phenyl amines is mixed with the common sewage to obtain the mixed sewage; the pH value of the mixed sewage is regulated to be 8.0-8.5, and then physical treatment is carried out on the mixed sewage; (3) after physical treatment, the sewage enters a biochemical treatment system for biochemical treatment which sequentially comprises anaerobic treatment and aerobic treatment, wherein, the anaerobic treatment is that the returned nitrified liquid is treated under the anoxic condition, and nitrate nitrogen is transformed into nitrogen to be removed by denitrifying bacteria; and the aerobic treatment is moving bed biomembrane reactor technology; (4) after the biochemical treatment, the sewage enters subsequent processing procedure, and the treatment has discharge after reaching standards. The disposal technique can be widely applied to the industries such as dye, medicine, farm chemical, explosive and the like which contain a great deal of nitrobenzenes sewage.

Description

technical field [0001] The invention relates to a sewage treatment process, in particular to a treatment process for nitrobenzene-containing sewage. Background technique [0002] Nitrobenzene (NB) and nitrobenzene compounds play an important role in the organic chemical industry, and they are direct or indirect raw materials for many industries such as synthetic dyes, medicines, pesticides, and explosives. Nitrobenzene compounds are chemically stable, highly toxic and refractory. They can exist and accumulate in the environment for a long time, which will seriously threaten the health of humans and other organisms. Even if they are treated in time after poisoning, sequelae will still remain. It has been included in the strict control of environmental pollutants, and the environmental pollution of nitrobenzene has attracted more and more attention from scientific researchers. It is stable in nature, highly toxic, and has an inhibitory effect on microorganisms. It is a refrac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F1/70C02F1/66C02F1/24C02F1/52C02F101/38
Inventor 矫忠直丁士兵杨雄强李桂平
Owner DASMART ENVIRONMENTAL SCI & TECH (BEIJING) CO LTD
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