Working electrode for degrading petroleum hydrocarbon, device for degrading petroleum hydrocarbon and application

Abstract

The invention relates to the technical field of microbial electrochemistry, in particular to a working electrode for degrading petroleum hydrocarbon, a device for degrading petroleum hydrocarbon and application. The working electrode for degrading petroleum hydrocarbon provided by the invention comprises a conductive substrate; the working surface of the conductive substrate is composed of a conductive region and an etching region; the conductive region and the conductive substrate are concentric circles, and the diameter of the conductive substrate is larger than that of the conductive region; the etching region is a circular ring; the sum of the diameter of the conductive region and the wall thickness of the etching region is the same as the diameter of the conductive substrate; the etching region comprises a groove region and a non-groove region; the grooves in the groove region are arranged at intervals along the diameter direction; electroactive microorganisms grow on the surface of the conductive region; the electroactive microorganisms comprise petroleum hydrocarbon degrading bacteria; and magnetite is laid in the groove region. According to the working electrode, the repairing range of the electroactive microorganisms is expanded, and the degradation efficiency of petroleum hydrocarbon is further enhanced.

Description

technical field [0001] The invention relates to the technical field of microbial electrochemistry, in particular to a working electrode for degrading petroleum hydrocarbons, a device and application for degrading petroleum hydrocarbons. Background technique [0002] At present, serious oil pollution problems will be brought about in the exploitation and utilization of oil fields. The erosion of ground oil and the leakage of oil transportation pipelines lead to the pollution of oil to the soil, and with the infiltration and migration in the soil, the oil will gradually pollute the surface water and groundwater, resulting in the decrease of dissolved oxygen in the water body, causing damage to the aquatic ecosystem. serious threat. Therefore, solving the problem of petroleum hydrocarbon pollution in water bodies has become a research hotspot of widespread concern in various countries. [0003] Due to the anaerobic characteristics of petroleum hydrocarbon-contaminated water b...

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Problems solved by technology

[0004] However, in the current MET, the electroactive microorganisms are mainly enriched on the electrode, so the repair range is greatly limited, and only the petroleum hydrocarbon molecules within 1cm around the electrode enriched with electroactive microorganisms can be repaired, and the electroactive microorganisms are in the After being enriched on the electrode for a long time, due to the thickening of the electroactive microbial film, the mass transfer is affected, and its electricity production performance is also greatly affected, which further limits the degradation process of petroleum hydrocarbons.

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