Combined Constructed Wetland Based on Solar Aeration and Intermittent Aeration

Abstract

The invention discloses a combined artificial wetland based on solar oxygenating intermittent aeration. The combined artificial wetland comprises an upstream vertical flow artificial wetland and a downstream vertical flow artificial wetland which are communicated with each other through a siphonage pipeline, wherein a wall body is arranged around the artificial wetland; sampling openings are formed in one side of the wall body at equal intervals, and a gravel layer, a volcanic layer, a mixed substrate layer and a grit layer are sequentially arranged in each of the sampling openings from bottom to top; emergent aquatic plants are planted in the mixed substrate layer; a solar battery panel is arranged on the top of the wall body of the artificial wetland through a bracket which is connected with an aerating pump, the air outlet of the aerating pump is connected with one end of an aerating pipe while the other end of the aerating pipe penetrates through the wall body and is arranged in the volcanic layer, and a gate valve and a gas flowmeter for controlling the aerating quantity are arranged on the aerating pipe. The artificial wetland disclosed by the invention by way of intermittent aeration is high in decontamination capability and has the advantages of being energy-saving, environmentally friendly, high in sewage purifying capacity, cost-lowering, high in efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a combined artificial wetland which improves the sewage purification effect by means of solar intermittent micro-aeration to enhance oxygen supply. Background technique [0002] Constructed wetlands is a new type of wastewater biological treatment technology developed in the late 1970s. It has the characteristics of low energy consumption, good treatment effect, low operating cost and easy management, which makes it widely used all over the world. In the treatment of urban and rural domestic sewage. Constructed wetland is an artificial ecosystem that simulates natural wetlands. It is constructed by artificial pools. During the process of sewage flowing in a certain direction, the physical, chemical and biological triple synergy of plants, substrates and microorganisms is used to purify sewage. Engineering Constructs. In the artificial construction ...

AI Technical Summary

Problems solved by technology

However, some studies have found that the level of dissolved oxygen provided by plant roots is far from sufficient relative to the actual sewage pollutant load

During the operation of the constructed wetland, there will be insufficient oxygen supply in some areas. The existing aeration system technology is relatively weak. Continuous aeration can indeed effectively improve the removal effect of ammonia nitrogen and nitrite nitrogen, but the oxygen-enriched environment produced by continuous aeration It is not conducive to the removal of nitrate nitrogen. The intermittent aeration method can not only ensure sufficient dissolved oxygen but also reduce the enrichment of nitrate nitrogen. Good environment, improve phosphorus removal effect

The traditional large-aperture aeration pump aeration method and single aeration position are gradually eliminated due to the simple process and high energy consumption. Therefore, it is urgent to develop an energy-saving and environmentally friendly aeration method, and enhance oxygen supply measures to improve vertical subsurface flow Constructed wetland sewage Purification effect

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