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Synergistic Degradation of Perchlorate in Water by Microbial Heterotrophy and Sulfur Autotrophy

A technology of perchlorate and sulfur autotrophy, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of lower pH value of effluent, and achieve simplified biological treatment unit , expand processing capacity, and avoid secondary pollution

Active Publication Date: 2016-04-13
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with heterotrophic reduction degradation, sulfur autotrophic reduction degrades ClO 4 - The outstanding advantage of this method is that it avoids secondary pollution caused by excess organic matter remaining in the water body, excessive microbial proliferation, etc., but this method also has certain problems, such as the by-product SO produced during the sulfur autotrophic process 4 2- Ions, the pH value of the effluent decreases, etc.

Method used

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  • Synergistic Degradation of Perchlorate in Water by Microbial Heterotrophy and Sulfur Autotrophy
  • Synergistic Degradation of Perchlorate in Water by Microbial Heterotrophy and Sulfur Autotrophy

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Embodiment 1

[0020] Influent perchlorate concentration is 50mg / L, established as figure 1 The shown reactor, the heterotrophic section and the autotrophic section are fixed bed reactors, made of plexiglass columns (diameter 10cm, height 60cm, packing height 50cm, the heterotrophic section is filled with elastic fiber filler, and the sulfur autotrophic section is filled with Sulfur particles with a particle size of 3-4mm), adding 20mg / L sodium acetate as a carbon source in the heterotrophic stage, after the two stages of microbial domestication, the total hydraulic retention time is 8h, and the concentration of perchlorate in the effluent is lower than 0.05mg / L L and no sodium acetate residue.

Embodiment 2

[0022] Influent perchlorate concentration is 20mg / L, established as figure 1 The shown reactor, the heterotrophic section and the autotrophic section are fixed bed reactors, made of plexiglass columns (diameter 9cm, height 50cm, packing height 40cm, heterotrophic section filling elastic fiber filler, sulfur autotrophic section filling Sulfur particles with a particle size of 2-3mm), adding 8mg / L acetic acid as a carbon source in the heterotrophic stage, after the two stages of microbial domestication, the total hydraulic retention time is 2h, and the concentration of perchlorate in the effluent is lower than 0.05mg / L And no sodium acetate residue.

Embodiment 3

[0024] Influent perchlorate concentration is 30mg / L, established as figure 2 The reactor shown is made of plexiglass column (9cm in diameter, 50cm in height, filled with sulfur particles with a particle size of 3-4mm, and filled with a height of 40cm), adding 10mg / L of acetic acid as a carbon source in the heterotrophic section, and the symbiotic microorganisms are domesticated After success, the total hydraulic retention time is 3 hours, the perchlorate concentration in the effluent is lower than 0.05mg / L and there is no sodium acetate residue.

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Abstract

The invention relates to method for removing pollutant perchlorate in water, and belongs to the field of application of water treatment techniques. According to the technical principle, a pollutant degradation process is divided into a microorganism heterotrophism reduction process and a sulfur autrophism reduction process; the addition amount of an organic carbon source is controlled to be less than a chemical stoichiometric ratio in the heterotrophism reduction process, in the process, as the addition amount of the carbon source is not sufficient, the perchlorate cannot be completely removed, and the residual perchlorate can be further reduced and degraded in the later sulfur autrophism reduction process. By adopting the method, the defects of the prior art in heterotrophism and sulfur autrophism reduction of perchlorate are overcome, the two processes bring the synergistic effect into play, the addition amount of the carbon resource is strictly controlled in the heterotrophism period, secondary pollution caused by redundant carbon resource is effectively avoided, and meanwhile the load ratio of the heterotrophism period to the sulfur autrophism period is adjusted so as to control generation of byproducts. A treatment unit for removing perchlorate in water is simplified, high in efficiency, easy to operate and small in occupied area.

Description

technical field [0001] The invention relates to a method for removing pollutant perchlorate in water, which belongs to the application field of water treatment technology. The technical principle of the invention is to use the synergistic reduction effect of microbial heterotroph and sulfur autotroph to remove the pollutant perchlorate in water. The reaction device of the present invention is divided into heterotrophic and autotrophic sections. In the heterotrophic section, an insufficient amount of carbon source is added, and the perchlorate not removed in this section can be reduced and removed by microorganisms in the sulfur autotrophic section. The heterotrophic section and the autotrophic section The load of the autotrophic section can be flexibly adjusted, which can effectively avoid secondary pollution caused by the carbon source added by heterotrophs, and at the same time flexibly control the production of by-products (such as sulfate) in the sulfur autotrophic section...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34
Inventor 万东锦刘永德张健邰双汭张良波李莹王依依牛振华
Owner HENAN UNIVERSITY OF TECHNOLOGY