Oxygen supply-controllable vertical-underflow artificial wetland denitriding device

Abstract

The invention discloses an oxygen supply-controllable vertical-underflow artificial wetland denitriding device. The device consists of a water charging pump, a water charging pipe, a water distribution pipe, a surface matrix, a base matrix, a ventilating pipe, a water collecting pipe, a water discharging pipe, a wetland plant, oxygen supply equipment, a time control switch and a seepage-proofing membrane. The device can be used for enhancing oxygen supply inside the wetland by aeration of the oxygen supply equipment, so that the depth of the wetland is increased and the floor area of the wetland is reduced. Meanwhile, by controlling the submerging water depth at the lower part of the wetland, internal anoxia and aerobic environments are formed inside the whole device; the aeration time is controlled by the time control switch; carbon sources of a denitrification section are increased by means of intermittent aeration so as to purify sewage and realize high-efficiency denitrification; the discharged water reaches the first-grade B emission standards in GB18918-2002. Besides, by aeration of the perforated ventilating pipe, the wetland is more uniform in water discharging and water distribution, so that the effective utilization rate of matrix volume in the wetland is increased, and thus the removal efficiency of pollutants is improved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a vertical underflow artificial wetland denitrification treatment device with controllable oxygen supply, which is suitable for the treatment of domestic sewage, polluted surface water and waste water with high concentration of ammonia nitrogen. Background technique [0002] Constructed wetland technology originated in the early 20th century and was developed in Europe and the United States. Due to its low investment and operating costs, simple structure, convenient construction, and easy management and maintenance, it has gradually been widely used. Specific forms include surface flow wetlands, horizontal subsurface flow wetlands, vertical subsurface flow wetlands, and composite vertical flow wetlands. Among them, subsurface wetlands are widely used in my country because they are less affected by climate, seasons and other factors, and can effective...

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Problems solved by technology

[0005] The purpose of the present invention is to propose a vertical subsurface flow constructed wetland denitrification treatment device with controllable oxygen supply in view of the deficiency of the existing constructed wetland oxygenation mode and the deficiency of the denitrification carbon source of the first-level vertical subsurface flow constructed wetland. The content of oxygen in the vertical subsurface flow constructed wetland solves the problem of oxygen supply inside the constructed wetland. By setting the submerged water depth at the bottom of the wetland, an anoxic environment is created, and the amount of carbon source entering the denitrification section is controlled by intermittent aeration to better improve the device. High denitrification treatment capacity, while saving infrastructure and operating costs to a greater extent

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