Method for performing degradation on pollutant-nitrobenzene-containing water body by using anaerobic mixed bacteria

A technology for nitrobenzene and pollutants, applied in water pollutants, anaerobic digestion treatment, chemical instruments and methods, etc., can solve the problems of high price, biological toxicity, low degradation rate, etc. easy to obtain effect

Inactive Publication Date: 2017-09-29
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these materials have disadvantages such as high price and biological toxicity, and their degradation rate is low

Method used

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  • Method for performing degradation on pollutant-nitrobenzene-containing water body by using anaerobic mixed bacteria
  • Method for performing degradation on pollutant-nitrobenzene-containing water body by using anaerobic mixed bacteria
  • Method for performing degradation on pollutant-nitrobenzene-containing water body by using anaerobic mixed bacteria

Examples

Experimental program
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Effect test

Embodiment 1

[0051] The pine wood chips were heated up to 400°C at a rate of 5°C / min in a nitrogen atmosphere, kept at a constant temperature for 3 hours, and then naturally cooled to room temperature (the entire pyrolysis process was carried out in a protective atmosphere), ground and passed through a 100-mesh sieve to obtain biochar .

[0052] The present invention carries out scanning electron microscope analysis to the biochar that makes, see figure 1 , figure 1 Scanning electron micrograph of the biochar prepared in Example 1 of the present invention. Depend on figure 1 The surface morphology of the material can be seen.

[0053] The present invention carries out XPS analysis to biochar, and the results are shown in Table 2, and Table 2 is the O1s spectrogram in the XPS spectrum of the biochar prepared in Example 1 of the present invention, by figure 2 It can be seen that there are different oxygen-containing functional groups on the surface of the biochar material.

[0054] Des...

Embodiment 2

[0061] Take 14 reactors, numbered 1-14 respectively, add materials to the 14 reactors according to Table 2, the concentration of nitrobenzene is 1mmol / L, and the amount of anaerobic sludge is 0.5g; the anaerobic sludge includes green Pseudomonas, Spirulina, Desulfovibrio and Actinomycetes. Electron donors were: no (control), glucose, formate, acetate, propionate, butyrate and hydrogen, respectively. The content of each substance was determined by providing the same COD. The reduction conversion of nitrobenzene under different electron donor conditions was studied, and the degradation rates of nitrobenzene under different electron donor conditions are shown in Table 2:

[0062] Table 2 The degradation rate of nitrobenzene under different electron donor conditions

[0063]

[0064] Table 2 shows that when different electron donors exist, biochar can be used as a catalyst to accelerate the degradation of nitrobenzene in the anaerobic mixed bacteria system. At the same time,...

Embodiment 3

[0066] Take 14 reactors, numbered 1~14 respectively, the concentration of nitrobenzene is 1mmol / L, and the amount of anaerobic sludge is 0.5g; Actinomycetes. The specific conditions and the degradation rate of nitrobenzene are shown in Table 3:

[0067] Table 3 Degradation rate of nitrobenzene under different electron donor conditions

[0068]

[0069] The results in Table 3 show that increasing the concentration of electron donors can accelerate the anaerobic degradation of nitrobenzene.

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Abstract

The invention provides a method for performing degradation on a pollutant-nitrobenzene-containing water body by using anaerobic mixed bacteria. The method comprises the following steps: mixing a catalyst, anaerobic sludge, an electron donor and a nitrobenzene-containing water body under anaerobic conditions to obtain a reaction solution; and carrying out oscillating reaction on the reaction solution under anaerobic conditions to obtain a treated water body. The catalyst is biochar of which the particle size is 80-120 meshes; and the anaerobic sludge comprises Pseudomonas aeruginosa, Marinospirillum, Desulfovibrio and Actinomycetes. The method provided by the invention adopts the biochar as the catalyst, and the anaerobic sludge is utilized to provide mixed bacteria and can accelerate the degradation of nitrobenzenes in the water body under anaerobic conditions. The method has high nitrobenzene degradation rate, and can not cause secondary pollution. The biochar is low in cost and easy to prepare. The method is simple and feasible in technical operation, and is convenient for practical popularization and use.

Description

technical field [0001] The invention relates to the technical field of organic wastewater treatment, in particular to a method for anaerobic mixed bacteria to degrade water containing pollutant nitrobenzene. Background technique [0002] Nitrobenzene is an important chemical raw material used to produce medicines, dyes, plastics, explosives and pesticides. However, the serious environmental pollution it brings has gradually attracted everyone's attention, and many countries regard nitrobenzene as an important pollutant. At present, there are many physical and chemical methods to remove nitrobenzene (adsorption and advanced oxidation, etc.), but these treatment methods are expensive or may produce more toxic intermediate products. Biological treatment of nitrobenzene can produce aniline, a less toxic product. Obviously, biological treatment is a cheap and effective method for sewage treatment. [0003] At present, the main biological method uses anaerobic reduction to degra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34C02F101/38C02F101/34
CPCC02F3/28C02F3/34C02F2101/34C02F2101/38
Inventor 穆杨赵汉卿刘奇何盼盼陈祖高
Owner UNIV OF SCI & TECH OF CHINA
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