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Subsurface flow constructed wetland sewage treatment system by drop water aeration oxygenation

A sewage treatment system, a technology of falling water aeration, applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc. , low internal dissolved oxygen and other problems, to achieve the effect of extending the hydraulic retention time, reducing the area of ​​​​the dead water area, and the small dead water area

Inactive Publication Date: 2010-02-10
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the short research time on constructed wetlands, there are still many deficiencies in the actual application process, such as short residence time of sewage, easy blockage of wetlands, low internal dissolved oxygen, easy formation of dead water areas, and large footprints, etc.

Method used

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  • Subsurface flow constructed wetland sewage treatment system by drop water aeration oxygenation
  • Subsurface flow constructed wetland sewage treatment system by drop water aeration oxygenation

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] see figure 1 and figure 2 As can be seen from the figure, the subsurface flow constructed wetland sewage treatment system using falling water aeration and oxygenation in the present invention is composed of one or more stages in series of falling water aeration subsurface flow constructed wetlands. Each stage of falling water aeration submerged flow constructed wetland includes a bed body 9 , the front end of the bed body 9 is provided with a water inlet retaining wall 10 , and the flow channel formed by the water inlet retaining wall 10 and the bottom of the bed body 9 is the water inlet 1 . The tail end of the bed body 9 is provided with a water outlet retaining wall 11, and the top of the outlet water retaining wall is an inclined overflow dam, that is, the water outlet mode of the present invention is the overflow of the top inclined overflow dam. At diff...

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Abstract

The invention relates to a subsurface flow constructed wetland sewage treatment system by drop water aeration oxygenation, composed of drop water aeration subsurface flow constructed wetlands in one stage or multistage series. Each stage of drop water aeration subsurface flow constructed wetland comprises a bed body, an inflow barricade, an outlet barricade and a drop water baffle; wherein a plurality of deflectors, gravel fillers and emergent aquatic plants are arranged in the bed body between the inflow barricade and the outlet barricade. The invention is even in water distribution, small inwake space and uniform in water impact, residence time of sewage in the bed body is extended, blocking is difficult, thus being beneficial to improving effluent quality and biodegradation of microorganism on nutrient such as nitrogen, phosphor and the like in the sewage, and construction and running cost is low. The invention, under the joint action of the effects, can effectively degrade pollutant of urban and town domestic sewage, a small amount of industry waste water and farm drainage and is applicable to mountain land and hilly country with certain gradient.

Description

technical field [0001] The invention relates to a sewage purification treatment technology, in particular to an underflow constructed wetland sewage treatment system utilizing falling water aeration and oxygenation, and belongs to the technical field of environmental protection water treatment. Background technique [0002] Constructed wetland is a new sewage ecological treatment technology developed in the 1970s and 1980s. According to the different ways of sewage flow in the wetland, the sewage treatment process of constructed wetland can be divided into three types: surface flow constructed wetland, subsurface flow constructed wetland and vertical flow constructed wetland, among which subsurface flow constructed wetland is the most widely used. The purification principle of constructed wetland is to treat sewage through the synergy of physics, chemistry and biology in the wetland ecosystem. It has the characteristics of low operating cost, simple maintenance and managemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/34
CPCY02W10/10
Inventor 方芳高旭王磊郭劲松刘智萍王春燕邹建勇
Owner CHONGQING UNIV
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