Method for removing perchlorate from drinking water
A technology for perchlorate and drinking water, applied in the field of environmental engineering, can solve problems such as low effluent pH, and achieve the effects of small sludge production, easy maintenance and management, and easy access.
Inactive Publication Date: 2012-08-01
高洁
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Problems solved by technology
[0005] In the process of sulfur autotrophic reduction of perchlorate, the effluent pH is low and SO 4 2- The problem of exceeding the standard, the present invention provides a method for removing perchlorate in drinking water with a complex three-dimensional electrode-biofilm reactor and its reactor
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[0013] The implementation that the present invention adopts technical solution comprises the following steps:
[0014] (1) Take the return sludge or anaerobic sludge from the secondary sedimentation tank of the urban sewage treatment plant, first remove the impurities contained in the sludge, and add it to the batch culture device containing raw water with higher concentration of perchlorate , by adding a certain concentration of inorganic carbon source, elemental S 0 and inorganic nutrients, and regularly feed hydrogen into the batch culture device to domesticate and enrich sulfur autotrophic perchlorate reducing bacteria and hydrogen autotrophic perchlorate reducing bacteria. During the cultivation and acclimatization process, regularly monitor the perchlorate, pH, Cl - , SO 4 2- and oxidation-reduction potential (ORP) changes in each culture acclimatization cycle. When the perchlorate reducing effect stabilized in different periods, the culture acclimation process ended...
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Abstract
The invention provides a method for removing perchlorate from drinking water. Based on a two-dimensional electrode-biofilm reactor, a mixed filler of elemental S<0> and activated carbon is added between a cathode and an anode to form a bipolar three-dimensional electrode-biofilm reactor. In the sulfur-based autotrophic reduction process of the perchlorate, the elemental S<0> is taken as an electron donor, the perchlorate is reduced to Cl<->, and H<+> and SO4<2-> are generated. The H<+> is reduced to H2 through electrochemical reaction of the activated carbon and an electrode in the reactor, and the H2 is taken as an electron donor in the hydrogen-based autotrophic reduction process of the perchlorate, so that the problems that the pH value of effluent is relatively low and the content of the SO4<2-> of the effluent exceeds the standard in the sulfur-based autotrophic reduction process of the perchlorate are effectively solved. The method is economical, efficient and easy to operate.
Description
technical field [0001] The invention belongs to the technical field of environmental engineering, and relates to a method for removing perchlorate in drinking water and a reactor thereof, in particular to combining a sulfur autotrophic perchlorate reduction process with an electrochemical hydrogen autotrophic perchlorate reduction process. Combined to form a complex three-dimensional electrode-biofilm reactor. Background technique [0002] Perchlorate is a highly diffusible persistent toxic pollutant. It is widely used in rocket propellants, pyrotechnics manufacturing and arms industry, and is also used as an additive in lubricants, fabric fixatives, electroplating solutions, Magnesium batteries, automotive airbags, flashing panels for road safety, leather processing, rubber manufacturing, dye and paint production. Perchlorate in water mainly comes from discharges and wastes from factories that produce and use perchlorate. Perchlorate is a non-volatile, water-soluble subst...
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IPC IPC(8): C02F3/34C02F1/46C02F1/58C02F101/36C02F101/34
Inventor 高洁
Owner 高洁