Tidal current wetland coupled electrochemical reinforced denitrification and dephosphorization method and system

Abstract

The invention belongs to the field of sewage treatment, and relates to a tidal current wetland coupled electrochemical reinforced denitrification and dephosphorization method and system. The system comprises a tidal current artificial wetland aerobic bed (1), an anaerobic electrolysis bed (2) positioned on the lower part of the tidal current artificial wetland aerobic bed (1), and a system reflux pump (8) for connecting the tidal current artificial wetland aerobic bed (1) and the anaerobic electrolysis bed (2), wherein the tidal current artificial wetland aerobic bed (1) is communicated with a water inlet pipe (5) of an arranged pump, and planted with wetland plants (9); a first plate electrode (4) and a second plate electrode (11) are arranged inside the anaerobic electrolysis bed (2) and respectively connected with electrodes of a direct current power supply (3), and the bottom of the anaerobic electrolysis bed (2) is provided with a draining valve (6); and the positive and negative electrodes of the direct current power supply (3) can be exchanged regularly. The invention can reinforce the removal effect of nitrate and phosphate in the tidal current artificial wetland bed, and solve the problem that the operation of the wetland sewage treatment is greatly influenced by the seasonal changes, and the like.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a method and system for coupling electrochemically enhanced denitrification and dephosphorization in tidal flow wetlands. Background technique [0002] With the rapid development of the economy and the continuous improvement of people's living standards, the amount of sewage discharge is also increasing, making my country's water source pollution, water eutrophication and environmental water quality deterioration increasingly serious. At present, my country's sewage treatment mainly relies on the traditional centralized activated sludge process. Although the technology and process have become increasingly mature and perfect, they are facing the problem of high construction and operation costs, and many economically underdeveloped areas simply cannot afford it. Large-scale sewage treatment plants, but many established sewage treatment plants are idle due to the shortage ...

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Problems solved by technology

[0006] In view of the above problems, the present invention provides a tidal flow constructed wetland coupling electrochemical synergistically enhanced nitrogen and phosphorus removal method and system, which can not only strengthen the removal effect of nitrate and phosphate in the tidal flow constructed wetland bed, but also solve the problem of wetland The operation of sewage treatment is greatly affected by seasonal changes, etc.

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