Construction method of composite horizontal subsurface wetland

A horizontal submerged flow and composite technology, applied in the field of environmental engineering, can solve the problems of poor effect and large investment in purifying eutrophic wastewater, achieve low cost, low treatment cost, and improve the effect of wastewater treatment

Inactive Publication Date: 2014-07-02
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method of a composite horizontal subsurface flow wetland in order to solve the problems of large investment and poor effect of the above-mentioned method for purifying eutrophic wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for constructing a composite horizontal subsurface flow wetland is characterized in that it specifically includes the following steps:

[0027] (1) River bed cleaning

[0028] Drain the original river channel used for sewage discharge, clear the river bottom sludge, and level the river bed so that the vertical downward slope is 1%;

[0029] (2), mixing

[0030] Screen marble stones with a particle size of 3 cm and iron slag with a particle size of 1 cm, and calculate according to the mass ratio, that is, marble stones: iron slag is mixed at a ratio of 1000:1 and stirred 3 times to obtain stone materials;

[0031] (3), laying material

[0032] Lay the stones obtained in step (2) on the river bed cleaned in step (1), and the height is 20cm lower than the river bank to form a river channel;

[0033] (4), plant planting

[0034] Select 1-year-old reed or cattail, cut off the stems and leaves of the aboveground part, and plant its perennial roots on the stone la...

Embodiment 2

[0041] A method for constructing a composite horizontal subsurface flow wetland is characterized in that it specifically includes the following steps:

[0042] (1) River bed cleaning

[0043] Drain the original river channel used for sewage discharge, remove the sludge at the bottom of the river, and level the river bed so that the vertical downward slope is 2%;

[0044] (2), mixing

[0045] Screen marble stones with a particle size of 4 cm and iron slag with a particle size of 3 cm, and calculate according to the mass ratio, that is, marble stones: iron slag is mixed at a ratio of 1000:2 and stirred 4 times to obtain stone materials;

[0046] (3), laying material

[0047] Lay the stones obtained in step (2) on the river bed cleaned in step (1), and the height is 30cm lower than the river bank to form a river channel;

[0048] (4), plant planting

[0049] Select 2-year-old reeds or cattails, cut off the stems and leaves of the aboveground part, and plant their perennial ro...

Embodiment 3

[0056] A method for constructing a composite horizontal subsurface flow wetland is characterized in that it specifically includes the following steps:

[0057] (1) River bed cleaning

[0058] Drain the original river channel used for sewage discharge, clear the river bottom sludge, and level the river bed so that the vertical downward slope is 3%;

[0059] (2), mixing

[0060] Screen marble stones with a particle size of 5 cm and iron slag with a particle size of 5 cm, and calculate according to the mass ratio, that is, marble stones: iron slag is mixed at a ratio of 1000:3 and stirred 5 times to obtain stone materials;

[0061] (3), laying materials

[0062] Lay the stones obtained in step (2) on the river bed cleaned in step (1), and the height is 40cm lower than the river bank to form a river channel;

[0063] (4), plant planting

[0064] Select 3-year-old reeds or cattails, cut off the stems and leaves of the aboveground part, and plant their perennial roots on the sto...

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Abstract

The invention discloses a construction method of a composite horizontal subsurface wetland. The construction method comprises the following steps of primarily clearing a river bed, mixing marble pebbles and iron-ore slag in mass ratio of 1000: (1-3) to obtain a stone material, and paving the stone material on the cleared river bed to form a riverway; selecting reed or cattail of 1 to 3 years old, cutting stem leaves on the upper part of the reed or cattail, and planting perennial roots of the reed or cattail onto the paved stone material; and paving the toxic-free rubber particles with the granularity of 2cm to 4cm on the surface of the riverway with the reed or cattail, and finally inserting ventilation pipes into the surface of the riverway which is paved with the toxic-free rubber particles to complete the construction of the composite horizontal subsurface wetland.

Description

technical field [0001] The invention relates to a construction method of a composite horizontal subsurface flow wetland, which belongs to the field of environmental engineering. Background technique [0002] Due to the production and use of a large amount of nitrogen- and phosphorus-containing fertilizers in agricultural production, as well as industrial wastewater such as food processing and animal product processing and urban domestic wastewater, especially the sewage generated by phosphorus-containing detergents is discharged into the river without treatment, making the river water It is rich in nitrogen, phosphorus and other plant nutrients, resulting in eutrophication of water bodies. In eutrophic water bodies, due to sufficient nutrients, phytoplankton such as algae proliferate in large numbers, thereby excessively consuming oxygen in the water, causing the death of other aquatic plants and animals, and destroying the ecological balance. Therefore, measures must be ta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 韩建秋韩月
Owner SHANGHAI INST OF TECH
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