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Electrochemical-biological membrane synergistic reactor and application thereof in nitrogen-containing organic wastewater

A synergistic, reactor technology, applied in chemical instruments and methods, biological water/sewage treatment, sterilization/microdynamic water/sewage treatment, etc. There are few problems in capacity research, so as to achieve the effect of increasing joint processing capacity, saving energy and improving denitrification efficiency

Inactive Publication Date: 2015-03-04
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(Yao Jinghua, 2012, Who does China drain; Yao Jinghua, 2012, Journal of Environmental Science; Hu Chuanxia, ​​2008, Environmental Science and Technology; Guo Jinsong, 2012, Journal of Environmental Science) However, this type of reactor only uses the output of cathode and anode. The ability of hydrogen to produce carbon dioxide, the use and research of the redox ability of the electrode in the three-dimensional electrode-biofilm reactor is less; moreover, this type of reactor uses activated sludge to screen microorganisms, and it is easy to introduce other strains into the reactor, which is very important for the biofilm reactor. The operation of the reactor has a negative impact on

Method used

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  • Electrochemical-biological membrane synergistic reactor and application thereof in nitrogen-containing organic wastewater
  • Electrochemical-biological membrane synergistic reactor and application thereof in nitrogen-containing organic wastewater
  • Electrochemical-biological membrane synergistic reactor and application thereof in nitrogen-containing organic wastewater

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Experimental program
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Effect test

Embodiment 1

[0036] The graphite carbon plate wound with activated carbon fiber is used as the cathode, the titanium, iridium and ruthenium steady-state electrode is the anode, the electrode spacing is 3cm, and the activated carbon particles loaded with denitrifying paracoccus are used as the filler, and then the ratio is 1:6 The magnet particles are mixed evenly with it, and then the simulated wastewater containing nitrate nitrogen concentration of 90mg / L and pH of 7.5 enters the reactor from the water inlet through the peristaltic pump 10-1, and the influent flow rate is adjusted so that the hydraulic retention time is 7h , the applied current density is 30mA / cm 2 , The intermittent reaction time is 20 minutes, and the intermittent time and reaction time are 1:1. According to this cycle, samples are taken every 1h to determine the concentration of nitrate nitrogen in the effluent. The processing effect is attached figure 2 As shown, after 7 hours, the concentration of nitrate nitrogen ...

Embodiment 2

[0038] The graphite carbon plate wound with activated carbon fiber is used as the cathode, the titanium, iridium and ruthenium steady-state electrode is the anode, the electrode distance is 3 cm, and the activated carbon particles loaded with denitrifying paracoccus are used as the filler, and the ratio is 1:5. The magnet particles are evenly mixed with it, and the simulated wastewater containing nitrate nitrogen concentration of 60mg / L and pH of 7.5 enters the reactor through the water inlet through the peristaltic pump 10-1, and the influent flow rate is adjusted so that the hydraulic retention time is 7h. The current density is 30mA / cm 2 , The reaction interval time is 20 minutes, the interval time and the reaction time are 1:1, according to this cycle treatment, and the concentration of nitrate nitrogen in the effluent is measured by sampling every 1h. The processing effect is attached image 3 As shown, after 7 hours, the concentration of nitrate nitrogen in the effluent...

Embodiment 3

[0040] The graphite carbon plate wound with activated carbon fiber is used as the cathode, the titanium, iridium and ruthenium steady-state electrode is the anode, the distance between the electrodes is 3 cm, and the activated carbon particles loaded with denitrifying paracoccus are used as the filler, and the magnet with a ratio of 1:4 The particles are mixed evenly with it, and the simulated wastewater containing ammonia nitrogen concentration of 30mg / L and pH of 7.5 enters the reactor from the water inlet through the peristaltic pump 10-1, and the water flow rate is adjusted so that the hydraulic retention time is 7h, and the current density is applied 30mA / cm 2 , The intermittent reaction time is 20 minutes, and the intermittent time and reaction time are 1:1. According to this cycle, samples are taken every 1h to determine the concentration of nitrate nitrogen in the effluent. The processing effect is attached Figure 4 As shown, after 7 hours, the concentration of nitra...

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Abstract

The invention belongs to the technical field of sewage treatment, and in particular relates to an electrochemical-biological membrane synergistic reactor and an application thereof in nitrogen-containing organic wastewater. A main electrode of the reactor consists of a graphite carbon plate loaded metal copper-palladium negative electrode and two titanium-iridium-ruthenium stable-state positive electrodes; mixtures of activated carbon and magnet particles with the same particle size are filled in the main electrode; and the proportion of the magnet particles to the conductive activated carbon particles is 1:6-1:1. The electrochemical-biological membrane synergistic reactor is a wastewater denitrification device which is high in current efficiency and easy to operate and has the capability of removing nitrate nitrogen, ammonia nitrogen and COD (Chemical Oxygen Demand) at high efficiency and can retain at an acceptable energy consumption level; and the electrochemical-biological membrane synergistic reactor can be effectively degrading the nitrogen-containing organic wastewater and can be applied to treatment of the nitrogen-containing organic wastewater.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to an electrochemical-biofilm synergistic reactor and its application in nitrogen-containing organic wastewater. Background technique [0002] With the development of my country's industry and agriculture and the improvement of residents' living standards, the discharge of nitrogen-containing wastewater and the surface runoff of pesticides and fertilizers have increased year by year, and nitrate nitrogen has become a major pollutant in water bodies. Studies have shown that drinking water with high nitrate content can lead to increased hemoglobin in infants and related cancers in adults. At present, the methods and processes for removing nitrate from water include membrane technology, ion exchange, biofilm technology, and electrochemical denitrification. [0003] Electrochemical denitrification has attracted the attention of many researchers because of its good denitrificat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F1/467
Inventor 李正魁叶忠香张万广刘丹丹华蓉王晶晶赵琳周涛
Owner NANJING UNIV
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