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Integrated reactor and method for treating nitrogen-containing organic wastewater

A technology of organic wastewater and reactors, which is applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of low removal efficiency of COD and total nitrogen, and reduce the toxicity of effluent and improve the operation efficiency. Convenience, the effect of inhibiting accumulation

Pending Publication Date: 2019-05-24
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the first aspect of the present invention is to provide an integrated reactor for treating nitrogen-containing organic wastewater, so as to solve the technical problem that the existing electrochemical technology realizes the low removal efficiency of COD and total nitrogen in nitrogen-containing organic wastewater in one reactor

Method used

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  • Integrated reactor and method for treating nitrogen-containing organic wastewater

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Embodiment 1

[0044] As shown in the accompanying drawings of the description, an electrochemical device for treating nitrogen-containing organic waste water is filled with waste iron filings in the extractable mesh-shaped solid-phase electrolyte storage tank, and the target waste water is injected from the water inlet tank 1 through the peristaltic pump 3 After the electrochemical reactor 7, turn on the power supply, electrolyze for 120min, static precipitation, the solid phase is discharged from the mud discharge port 11, and the liquid phase is taken to the dechlorination bed reactor 8 through the electrochemical reactor water outlet 13, after staying for 60min, pass Sampling was carried out at the outlet 14 of the dechlorination bed reactor to test the treatment effect.

[0045] Under the above conditions, the biochemical effluent of landfill leachate is selected as the experimental object (because it has all the characteristics of nitrogen-containing organic wastewater), after the sewag...

Embodiment 2

[0047] The reactor is set up as in Example 1, taking the actual landfill leachate biochemical effluent as the experimental object (because it has all the characteristics of nitrogen-containing organic wastewater), after the sewage is treated by the reactor of the present invention, compared with the traditional one that only has the cathode plate and In the electrochemical reactor on the anode plate, the accumulation of chloroform, trichloroethane, trichlorophenol and trichloropicrin in the effluent is reduced by 25% (the accumulation of organic chlorine can be further reduced through optimization). At the same time, no trichloroacetic acid was detected in the effluent.

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Abstract

The invention discloses a method for treating nitrogen-containing organic wastewater. According to the method, the removal rate of total nitrogen and COD (chemical oxygen demand) of a traditional electrochemistry oxidation process can be remarkably increased. The method includes that an iron solid-phase electrolyte is introduced, organic matter mediated amorphous iron compounds are formed in organic wastewater in an electrolytic cell, reduction acceleration of nitrate is indirectly triggered, and generation of hydroxyl radical is facilitated, so that the nitrogen-containing organic wastewateris deeply treated. The iron solid-phase electrolyte is introduced, so that generation of an organic chloride by-product is restrained in the electrolysis process, and available chlorine in effluent ofelectrochemical reactor is removed by a dechlorination bed reactor. The invention further provides an integrated reactor based on the method. The reactor is widely applicable to removal of total nitrogen and COD in nitrogen-containing organic wastewater (such as domestic sewage, industrial sewage, refuse leachate and the like), accumulation of the organic chloride by-product is restrained, and environmental risks are reduced. The reactor is simple to operate and stable in running and suitable for popularization in practical engineering.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method and a reactor for treating nitrogen-containing organic wastewater. Background technique [0002] Nitrogen-containing organic wastewater is a common type of wastewater that is widely derived from domestic sewage, aquaculture wastewater, toilet wastewater, and landfill leachate. The direct discharge of nitrogen-containing organic wastewater will reduce the redox potential of the receiving environment, induce eutrophication, cause regional ecological environmental problems and endanger human health. Currently, microbial techniques have been demonstrated for the removal of nitrogen and organic matter. However, the performance of microbial technology is easily affected by influent water quality (such as C / N ratio and pH value) and seasonal temperature, so it is difficult for microbial technology to obtain stable effluent water quality. In addition, it is difficult ...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/463C02F101/36C02F101/38C02F101/16
Inventor 冯传平邓阳陈男
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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