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Method for purifying sewage in artificial wet land by northern vertical subcurrent method

A constructed wetland and vertical underflow technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of pipeline freezing, vegetation withering, and the artificial wetland treatment system cannot be used in winter. Effectiveness and other issues, to prevent clogging and enhance the effect of purification

Inactive Publication Date: 2007-09-05
河南亚神环保科技有限公司
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Problems solved by technology

[0003] At present, my country's artificial wetlands are developing rapidly in the south of the Yangtze River, Guangzhou and Shenzhen are the fastest, followed by Shanghai and Yunnan, and then Nanjing and Wuhan. The artificial wetland technology is rarely used in the north of the Yangtze River. The main reason is that the winter climate in the north is cold , The freezing period is long, which can easily cause the pipes in the ordinary constructed wetland system to freeze and crack, and during this period, the vegetation in the constructed wetland will wither or stop growing; in addition, the low water temperature also seriously affects the growth of microorganisms, affect the treatment of sewage
The above-mentioned unfavorable factors have led to the problem that the ordinary constructed wetland treatment system cannot be used in winter in the north or has poor governance effects.

Method used

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  • Method for purifying sewage in artificial wet land by northern vertical subcurrent method
  • Method for purifying sewage in artificial wet land by northern vertical subcurrent method
  • Method for purifying sewage in artificial wet land by northern vertical subcurrent method

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Embodiment 1

[0043] Embodiment 1 A paper mill sewage treatment project implements the technical scheme of the present invention

[0044] The design processing capacity is 600 tons / day (the maximum load capacity is 1000 tons / day), and the total area of ​​constructed wetland is 1400m 2 , divided into two grids, each grid is 700m 2 , the two grids are connected in parallel and respectively enter the water.

[0045]The raw sewage enters the coagulation sedimentation tank through the grid for sedimentation, and then enters the aeration tank for oxygenation and oxidation, and then the pretreated supernatant with COD reduced to below 300mg / L is introduced into the constructed wetland for treatment. Constructed wetland consists of foundation pit 15, cofferdam 1, upper and lower water distribution pipe networks 18, 17, water collection pipes 16, 23, packing layer, microbial community attached to the packing layer and reed 9, foundation pit bottom 2 and cofferdam 1 For reinforcement and anti-seepa...

Embodiment 2

[0061] Embodiment 2 Second paper mill sewage treatment project implements the technical implementation scheme of the present invention

[0062] The design processing capacity is 2000 tons / day (3000 tons / day after 1 year), and the total area of ​​constructed wetland is 3000m 2 , divided into 6 grids, each grid is 500 m 2 , run in parallel, each grid is fed and drained separately. The aspect ratio of each excavated artificial wetland pool is 1:1.1, the pool depth is 1.8m, the slope of the pool bottom 2 is 2%, and it is inclined towards the outlets of the water collecting pipes 16 and 23 . Each constructed wetland adopts the packing layer structure shown in Figure 1 (from bottom to top):

[0063] Large-grained stone layer (thickness 40cm, limestone, particle size 40-80mm) 3;

[0064] Medium-grain gravel layer (thickness 40cm, select bluestone, particle size 20-30mm) 4;

[0065] Large sand layer (thickness 40cm, sand particle size 0.5-2mm) 5;

[0066] Rice stone layer (thickn...

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Abstract

A method for cleaning sewage by vertical undercurrent type artificial wet land in northern area features that a scientific microbe carrier network consisting filler layers, insulating reproduction layer, etc is disclosed for fast forming a biomembrane system for playing its cleaning role without plants in the winter, a deeply buried multi-layer water tube network can prevent freeze and cracking, and more insulating techniques are used to keep the temp of sewage to be treated to 15-20 deg.C.

Description

technical field [0001] The invention relates to a method for deep treatment of sewage in artificial wetlands, in particular to a method for purifying sewage in northern artificial wetlands with heat preservation measures, suitable for use in northern regions with cold winter climate and long freezing period, and good purification effect. Background technique [0002] With the development of industry, the aggravation of water pollution, and the contradiction between the shortage of fresh water resources and the improvement of people's living standards are becoming more and more serious, and the task of water environment protection is becoming more and more difficult. In recent years, environmental science research has been developing rapidly, and the global effect of water pollution is being actively explored. Various methods of water treatment pollution emerge in endlessly. Among them, the ecological treatment technology-constructed wetland technology has low investment, good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/32
CPCY02W10/10
Inventor 张四海王培名
Owner 河南亚神环保科技有限公司
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