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Backflow vertical wetland sewage treatment process and device, and application of process and device

A sewage treatment and wetland technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve unreported problems, achieve improved removal capacity, prevent clogging, high hydraulic power load effect

Active Publication Date: 2014-12-17
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a new type of ecological sewage treatment technology, constructed wetlands have been widely used in my country's water treatment. However, compared with foreign research progress, China is still in the stage of researching the efficiency and mechanism of constructed wetlands to remove conventional pollutants. About constructed wetlands Constructed wetland technology to remove trace toxic pollutants has not been reported yet

Method used

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  • Backflow vertical wetland sewage treatment process and device, and application of process and device
  • Backflow vertical wetland sewage treatment process and device, and application of process and device
  • Backflow vertical wetland sewage treatment process and device, and application of process and device

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Experimental program
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Effect test

Embodiment 1

[0043] This embodiment provides a backflow vertical wetland sewage treatment process to treat domestic sewage (from the sewage discharged daily by rural and urban residents), including the following steps:

[0044] S1. From top to bottom, the vertical flow constructed wetland, horizontal subsurface flow constructed wetland and storage tank are combined into a vertical sewage treatment system; the vertical flow constructed wetland, horizontal subsurface flow constructed wetland and storage tank are connected through water collection pipes and water distribution pipes;

[0045] The bottom layer of the vertical flow constructed wetland is provided with filler, and plants are planted on the surface of the filler; the horizontal subsurface flow constructed wetland is provided with filler;

[0046] S2. The circulation pump pumps the sewage from the storage tank, and realizes the oxygenation of the sewage in the process of single pumping. After the sewage is pumped out, the plants in ...

Embodiment 2

[0064] This embodiment provides a reflux vertical wetland sewage treatment process for treating pesticide-contaminated sewage (derived from agricultural non-point source pollution), including the following steps:

[0065] S1. From top to bottom, the vertical flow constructed wetland, horizontal subsurface flow constructed wetland and storage tank are combined into a vertical sewage treatment system; the vertical flow constructed wetland, horizontal subsurface flow constructed wetland and storage tank are connected through water collection pipes and water distribution pipes;

[0066] The bottom layer of the vertical flow constructed wetland is provided with filler, and plants are planted on the surface of the filler; the horizontal subsurface flow constructed wetland is provided with filler;

[0067] S2. The circulation pump pumps the sewage from the storage tank, and realizes the oxygenation of the sewage in the process of single pumping. After the sewage is pumped out, the pla...

Embodiment 3

[0085] This embodiment provides a reflux vertical wetland sewage treatment process for treating sewage polluted by heavy metals (from industrial sewage discharge), including the following steps:

[0086] S1. From top to bottom, the vertical flow constructed wetland, horizontal subsurface flow constructed wetland and storage tank are combined into a vertical sewage treatment system; the vertical flow constructed wetland, horizontal subsurface flow constructed wetland and storage tank are connected through water collection pipes and water distribution pipes;

[0087] The bottom layer of the vertical flow constructed wetland is provided with filler, and plants are planted on the surface of the filler; the horizontal subsurface flow constructed wetland is provided with filler;

[0088] S2. The circulation pump pumps the sewage from the storage tank, and realizes the oxygenation of the sewage in the process of single pumping. After the sewage is pumped out, the plants in the vertica...

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Abstract

The invention discloses a backflow vertical wetland sewage treatment process and device, and application of the process and the device. A vertical flow artificial wetland, a horizontal subsurface flow wet land and a reservoir are combined into a vertical structure from top to bottom. Circular treatment of sewage is achieved by laying a water level monitor to control the operation condition of a circulating pump, and each batch of sewage treatment capacity and treatment time are controlled and regulated by matching with a relay. Compared with a traditional artificial wetland, the backflow vertical wetland sewage treatment process has the advantages of being small in floor area, large in hydraulic loading, low in energy consumption, easy to operate and quick to remove pollutants; the conventional effluent water quality indicators CODCr, SS, TN and NH4<+>-N are much lower than the concentration threshold (GB18918-2002) defined by the first grade A standard of urban sewage treatment; the pesticide content in the effluent accords with the hygienic standard for drinking water (GB5749-2006); and the heavy metal content of the effluent reaches the surface water class II water standard (GB3838-2002). According to the backflow vertical wetland sewage treatment process, automatic treatment of the artificial wetland sewage is achieved, and the problem of poor single removal effect on organic matters and nitrogen pollutants in sewage through the artificial wetland is solved.

Description

technical field [0001] The invention relates to the technical field of environmental engineering sewage treatment, and more specifically, to a backflow vertical wetland sewage treatment process and device. Background technique [0002] Constructed wetlands can be divided into two categories: surface flow wetlands and subsurface flow wetlands. The construction and operation cost of surface flow constructed wetland is low, and it can effectively alleviate the impact of hydraulic pollution load, but it occupies a large area and the design and operation parameters are not accurate. Subsurface flow constructed wetlands are divided into horizontal subsurface flow and vertical subsurface flow. The construction cost of subsurface flow constructed wetlands is higher than that of surface flow constructed wetlands, but it can make full use of the wetland space to play a synergistic role among elements such as plants, substrates and microorganisms, and improve the ability to remove orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 杨扬陈沛君陶然郑哲唐小燕
Owner JINAN UNIVERSITY
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