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Method and process for synchronously removing perchlorate and nitrate in drinking water

A perchlorate and nitrate technology, applied in chemical instruments and methods, water pollutants, biological water/sewage treatment, etc., can solve problems such as exceeding the standard, and achieve the effect of solving the low pH and solving the SO42-excessive standard.

Inactive Publication Date: 2014-03-05
OCEAN UNIV OF CHINA
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Problems solved by technology

[0005] For existing S 0 In the method and process for removing perchlorate and nitrate in drinking water as an electron donor, there are low pH and SO in the effluent 4 2- For the problem of exceeding the standard, the present invention combines the characteristics of sulfur autotrophy and electrochemical hydrogen autotrophy, and proposes to couple sulfur autotrophic biofilm reactor and electrochemical hydrogen autotrophic complex three-dimensional electrode-biofilm reactor to simultaneously remove perchloric acid in drinking water Salt and Nitrate Technology

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  • Method and process for synchronously removing perchlorate and nitrate in drinking water
  • Method and process for synchronously removing perchlorate and nitrate in drinking water

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Embodiment Construction

[0008] The implementation of the technical solution of the present invention comprises the following steps:

[0009] 1. Prepare wastewater containing perchlorate and nitrate, and add a certain concentration of inorganic carbon sources and trace elements. Put the prepared wastewater containing perchlorate and nitrate into A# and B# anaerobic culture according to a certain amount. Inoculate the anaerobic sludge of the sewage treatment plant (or the bottom sludge of rivers and lakes) respectively, and use sulfur particles and hydrogen as electron donors in the A# anaerobic culture device and B# anaerobic culture device, respectively, to cultivate the domesticated sulfur autogenous Mixed perchlorate and nitrate reducing bacteria, hydroautotrophic perchlorate and nitrate reducing mixed bacteria. During the cultivation and acclimation process, the concentration changes of perchlorate and nitrate in the anaerobic cultivation device are regularly monitored, and the cultivation and acc...

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Abstract

The invention provides a method and process for synchronously removing perchlorate and nitrate in drinking water. In the method, perchlorate and nitrate in water are synchronously reduced through sulfur autotrophy and electrochemical hydrogen autotrophy coupling. The wastewater containing perchlorate and nitrate goes through a bio-membrane reactor taking sulfur particles as filler, and perchlorate and nitrate are partially reduced into chloride ions and nitrogen by taking elemental sulfur as an electron donor while H<+> and SO4<2-> are generated. A complex three-dimensional electrode-bio-membrane reactor taking a carbon medium as filler reduces H<+1> into H2 by use of an electrochemical process between a carbonaceous material and an electrode, and the rest perchlorate and nitrate are reduced into chloride ions and nitrogen by taking hydrogen as an electron donor. The method and process for synchronously removing perchlorate and nitrate in drinking water, provided by the invention, are economical and efficient and simple to operate.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a method and a process for synchronously removing perchlorate and nitrate in drinking water. Background technique [0002] With the rapid development of industrial and agricultural production, perchlorate and nitrate have become common anionic pollutants in surface water and groundwater. The traditional water treatment process (coagulation→sedimentation→filtration→disinfection) cannot effectively remove perchlorate and nitrate in the water source. Perchlorate in drinking water can interfere with the synthesis and secretion of thyroxine, thereby affecting the normal metabolism of the human body and hindering the normal growth and development of the human body. The safe concentration range of perchlorate in water is 4-18μg / L, and there is no safe concentration standard for perchlorate in my country. Nitrate in drinking water will be converted into nitri...

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Application Information

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IPC IPC(8): C02F3/34C02F101/12C02F101/16
Inventor 高孟春任云杨宁王子超王哲
Owner OCEAN UNIV OF CHINA
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