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a microbial battery

A microbial battery and microorganism technology, which is applied in the fields of biochemical fuel cells, biological water/sewage treatment, electrochemical and biological combined treatment, etc. Can not effectively remove organic matter and salt at the same time, strengthen the effect of power generation desalination, and reduce the effect of salt concentration

Active Publication Date: 2019-01-04
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional biocathode microbial desalination battery also has some disadvantages: (1) The anode cannot achieve good organic matter removal effect, especially it is difficult to degrade and remove refractory pollutants
(2) It is impossible to remove the salt in the anode and cathode sewage
(3) The intermediate desalination chamber cannot desalt the brine containing high concentrations of organic matter, otherwise it will cause membrane fouling and cavity blockage

Method used

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Embodiment 1

[0022] Such as figure 1 As shown, the microbial battery can be divided into 2n+1 chambers by a cation exchange membrane and an anion exchange membrane, where n is a natural number; the chambers obtained after the microbial battery is divided include an anode chamber 1, a cathode chamber 2 and a salt collection chamber 5 . The cation exchange membrane 3 is arranged on the side near the anode chamber, and the anion exchange membrane 4 is arranged on the side near the cathode chamber, and the chamber formed between the cation exchange membrane 3 and the anion exchange membrane 4 is the salt collection chamber 5, which can constitute a microbial battery. In addition, for multiple microbial batteries in multi-stage series, the anode chamber and the cathode chamber must be arranged alternately, and a salt collection chamber 5 is arranged between the anode chamber and the cathode chamber, and the chambers at both ends of the microbial battery can be anode chambers, or Both can be c...

Embodiment 2

[0033] As designed in embodiment 1 figure 1 The microbial battery is used for the treatment of domestic sewage and industrial wastewater. Specifically, the microorganisms in the anode chamber are inoculated on the anaerobic sludge of the sewage treatment plant, and the microorganisms in the cathode chamber are inoculated on the aerobic sludge of the sewage treatment plant. In the process of operation, the COD of actual sewage: >250mg / L, conductivity: >500μS / cm), and the operation mode is push flow. That is, the sewage is first pumped into the anode chamber at a rate of 35mL / h (the hydraulic retention time in the anode empty bed is 12h) to achieve the preliminary removal of organic matter. Afterwards, the sewage from which organic matter and salt have been initially removed enters the cathode chamber from the anode chamber, and further removes organic matter and salt ions under the aerobic condition generated by the cathode aeration head. Then the water from the cathode chamb...

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Abstract

The invention relates to the technical field of microbial batteries, in particular to a microbial battery capable of removing organic matter and salt in sewage at the same time. The microbial battery comprises an anode camber, a salt collecting chamber, a cathode chamber, and an outer resistor or an additional power source. The anode chamber and the salt collecting chamber are connected through a cation exchange membrane. The salt collecting chamber and the cathode chamber are connected through an anion-exchange membrane. The microbial battery can effectively remove the organic matter in the sewage and can effectively remove salt in the sewage, and the defects that a traditional microbial battery cannot effectively remove the organic matter and the salt in the sewage at the same time is overcome.

Description

technical field [0001] The invention relates to the technical field of microbial batteries, in particular to a microbial battery capable of simultaneously removing sewage organic matter and salt. Background technique [0002] Traditional urban sewage contains certain organic matter and salt. However, industrial wastewater such as food processing, textile printing and dyeing, leather manufacturing, petroleum production, pharmaceutical manufacturing, etc. contain higher concentrations of salt and organic matter. Sewage with salt, high nitrogen, and high organic matter. The traditional methods of removing organic matter in sewage treatment mainly include biological treatment technologies such as activated sludge method and biofilm method. However, the high salt content in industrial wastewater will inhibit the growth and activity of microorganisms in traditional biological methods and affect the organic matter in sewage. removal effect. On the other hand, common water desali...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00C02F3/30C02F3/34H01M8/16
CPCC02F3/005C02F3/301C02F3/34H01M8/16Y02E60/50
Inventor 黄霞左魁昌陈熹梁鹏张潇源
Owner TSINGHUA UNIV
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