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Microorganism electrolytic tank and organic matter oxidation and degradation synchronous CO2 methanation method

A technology of microbial electrolytic cell and bioelectrode, applied in the field of microbial electrolytic cell and its enhanced oxidative degradation of organic matter and synchronous CO2 methanation, which can solve imperfections and other problems, and achieve the effects of strengthening attachment growth, increasing transmission flux, and reducing crossover

Pending Publication Date: 2019-08-02
EAST CHINA NORMAL UNIV
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Problems solved by technology

However, as far as the short-term batch test is concerned, although it has advantages in verifying the timeliness of the expected conclusions, there are still some unavoidable imperfections

Method used

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  • Microorganism electrolytic tank and organic matter oxidation and degradation synchronous CO2 methanation method
  • Microorganism electrolytic tank and organic matter oxidation and degradation synchronous CO2 methanation method

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Embodiment 1

[0035] See attached figure 1 , the preparation and use of the electrolyte solution and trace solution added in the anode and cathode are the same as in Comparative Example 1, and the culture device adopts a 520 mL double-chamber MEC reactor 1, wherein the anode chamber and the cathode chamber are each 260 mL, including a 200 mL reaction volume With 60 mL of headspace for biogas collection. The average distance between the anode and the cathode is 4.0 cm. The two poles are connected to the potentiostat 4 through an external circuit to provide the required potential of -0.6 V. The two electrode materials used are carbon rod electrodes 21 wound by graphite felt 22 . The substrate of the anode chamber is the sludge supernatant diluted with the electrolyte, and its COD concentration is 3070.2 mg / L, which is used as the substrate of the anode chamber. Electrolyte and 5 mL of inoculated sludge were directly added to the cathode chamber, and the pH of the electrolyte in the cathode ...

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Abstract

The invention discloses a microorganism electrolytic tank and an organic matter oxidation and degradation synchronous CO2 methanation method. The microorganism electrolytic tank is characterized in that the anode and the cathode of the electrolytic tank are composite biological electrodes with a plurality of graphite felts in axial directions of carbon rod electrodes; an anode chamber is communicated with a cathode chamber through a pipeline with a proton transmembrane peristaltic pump; and the graphite felts are electrodes of three-dimensional structures made of a conductive high-polymer material. The organic matter oxidation and degradation synchronous CO2 methanation method comprises the following steps: preparing an electrolytic liquid and an anode chamber matrix, carrying out proton transmembrane transmission, and carrying out constant-potential electrochemical degradation. Compared with the prior art, the microorganism electrolytic tank is capable of intensifying adhesion growthof electric activity functional bacterial, forming biological membranes and conducing electrons, well solving the problem that proton H<+> transmission is inhibited because of PEM (Proton Exchange Membrane) pollution in the operation process of a reactor, avoiding low production efficiency of CH4 in the cathode chamber and increasing the transmission flux of proton H<+>, is beneficial to improvement of production efficiency of CH4, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of microbial electrochemistry, in particular to a microbial electrolytic cell and its enhanced oxidation and degradation of organic matter synchronous CO 2 Methanation method. [0002] Background technique: [0003] Microbial electrolysis cell (MEC) technology uses electroactive functional bacteria enriched on the surface of the cathode as a biocatalyst, driven by an external source of low potential, breaking through the limitations of overpotential and internal resistance, and using CO 2 As a carbon source, catalyze the synthesis of CH 4 and other low-carbon fuels, so as to realize CO 2 Emission reduction and value-added reuse. In the anode of the reaction chamber, active microorganisms are inoculated as an anode oxidant, which catalyzes the oxidation reaction of electron donors (water, small molecule organic acids and macromolecular carbohydrates, etc.), releasing electrons and protons H + , in which el...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/00
CPCC02F3/34C02F3/005
Inventor 甄广印郑韶娟陆雪琴张衷译王建辉潘阳
Owner EAST CHINA NORMAL UNIV
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