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Nesting mixed flow constructed wetland

A technology of constructed wetland and mixed flow, which is applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., and can solve problems such as limited application, large footprint, and single rules of constructed wetlands. Achieve the effects of convenient operation and maintenance, saving floor space, low investment and operating costs

Inactive Publication Date: 2010-05-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, urban land is in short supply, and traditional constructed wetlands have single rules and a large area, which limits their application

Method used

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  • Nesting mixed flow constructed wetland
  • Nesting mixed flow constructed wetland
  • Nesting mixed flow constructed wetland

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 As shown, this embodiment is a nested mixed flow artificial wetland formed by nesting and connecting the internal horizontal subsurface flow wetland 2 and the external surface flow wetland 3 in series. The external surface flow wetland 3 is in a ring shape, and the internal horizontal subsurface flow wetland 2. It can be set into a square or a rectangle according to local conditions, and the internal and external wetlands are connected through the perforated plate 5 to form a "pond-island" landscaping mode. The inner horizontal subsurface flow wetland 2 is provided with a water inlet pipe 1 , and the outer surface flow wetland 3 is provided with a water outlet pipe 7 . The water outlet pipe 7 on the outer surface wetland 3 is provided with a partition plate 4, which separates the water outlet pipe 7 from the perforated plate 5, and makes the sewage flow circularly along the pool body. Such as figure 2 As shown, the lower part of the matrix layer of t...

Embodiment 2

[0026] Such as image 3 As shown, this embodiment is a nested mixed-flow artificial wetland formed by nesting and connecting the internal surface flow wetland 3 and the external horizontal subsurface flow wetland 2 in series, forming a "garden-pond" landscaping mode. The outer horizontal subsurface flow wetland 2 is provided with a water inlet pipe 1 , and the inner surface flow wetland 3 is provided with a water outlet pipe 7 . Other configurations are the same as in Embodiment 1.

[0027] During operation, the sewage directly enters the gravel layer 8 of the horizontal subsurface flow wetland 2 through the water inlet pipe 1, and flows circularly along the pool body. The preliminarily purified sewage enters the surface flow wetland 3 through the perforated plate 5, undergoes further treatment, and is finally discharged through the outlet pipe 7.

Embodiment 3

[0029] Such as Figure 4 As shown, this embodiment is a nested mixed-flow artificial wetland formed by nesting and connecting the external surface flow wetland 3 and the internal vertical subsurface flow wetland 13 in series, forming a "pond-pagoda" landscaping mode. The inner vertical subsurface flow wetland 13 is provided with a water inlet pipe 1 , and the outer surface flow wetland 3 is provided with a water outlet pipe 7 .

[0030] The lower part of the matrix layer of the vertical subsurface wetland 13 is filled with a mixture of blast furnace slag, coal ash and gravel with good phosphorus removal effect, and its thickness is 90cm-105cm; The matrix layer of 3 is all the mixture 10 of pastoral soil and yellow sand, about 55cm~70cm thick. Other configurations are the same as in Embodiment 1.

[0031] When the system is running, the sewage enters the pastoral soil layer of the vertical underflow wetland 13 through the water inlet pipe 1, enters the gravel layer through in...

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Abstract

The invention provides a nesting mixed flow constructed wetland, comprising an internal wetland unit, an external wetland unit, a baffle plate and wetland plants; the internal wetland unit is nested in the external wetland unit, the two wetland units are communicated by arranging a perforated plate, the internal wetland unit and the external wetland unit adopt different wetland types and are isolated by the baffle plate, one wetland unit is provided with an inflow pipe, and the other wetland unit is provided with an outflow pipe, and the internal wetland unit and the external wetland unit are both planted with wetland plants. The nesting mixed flow constructed wetland has compact layout, relative high landscape value, high decontamination efficiency, good purification effect, simple structure, convenient operation and maintenance, low investment and low operation cost, fully utilizes land types, saves occupied area, can realize zero release of sewage in city blocks, and combines the advantages of sub-surface flow wetland and surface flow wetland.

Description

technical field [0001] The invention relates to a composite landscape artificial wetland suitable for domestic sewage treatment in urban communities, and belongs to the technical field of sewage purification. Background technique [0002] Constructed wetlands are artificially constructed, controllable and engineered wetland systems designed and constructed to treat wastewater through an optimized combination of chemical and biological actions in natural ecosystems. Constructed wetlands have the characteristics of good effluent quality, high nitrogen and phosphorus removal efficiency, convenient operation, maintenance and management, and low investment and operating costs. [0003] Constructed wetlands can be divided into two types according to the position of the water surface: surface flow constructed wetlands and subsurface flow constructed wetlands. Subsurface flow constructed wetlands can also be divided into horizontal subsurface flow constructed wetlands and vertical s...

Claims

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Application Information

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IPC IPC(8): C02F3/32C02F3/34
CPCY02W10/10
Inventor 张建李聪张成禄范金林胡振王丽贾文林李一冉
Owner SHANDONG UNIV
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