Multi-medium constructed wetland water treatment system and treatment method thereof

A water treatment system and constructed wetland technology, applied in the field of water treatment, can solve problems such as blockage of macromolecular organic matter and suspended matter, hindering the development and promotion of constructed wetlands, and complex pollutant components, so as to improve blockage, good removal effect, Improve the effect of adaptability and application range

Inactive Publication Date: 2014-04-09
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
View PDF10 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Studies over the years have shown that choosing emergent plants with large biomass such as reeds and cattails and highlighting the characteristics of biodiversity has a good effect on pollutant removal; different substrates have different purification efficiencies for pollutants, and zeolite and ceramics have different effects on pollutants. The removal effect of total nitrogen and ammonia nitrogen is good. Blast furnace steel slag, anthracite, slag, and fly ash have a good ability to remove phosphorus, so multi-level wetlands came into being. By matching different plants and substrates or building composite wetlands to effectively remove various Pollutants, but now many pollutants in sewage have complex components and large concentration fluctuations. The traditional constructed wetland system cannot effectively solve these problems; in addition, due to the long-term operation of the wetland, some large molecular organic matter and suspended matter that are difficult to degrade accumulate in the wetland system. This is also one of the important reasons hindering the development and promotion of constructed wetlands

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multi-medium constructed wetland water treatment system and treatment method thereof
  • Multi-medium constructed wetland water treatment system and treatment method thereof
  • Multi-medium constructed wetland water treatment system and treatment method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] see figure 1 , the sewage to be treated first flows into the water inlet tank 1, and a 1cm×1cm mesh grille 2 is placed in the water inlet tank 1 to remove large floating objects and sundries to prevent blockage. Then the sewage passes through the diversion pipe 3, and the flow meter 4 is adjusted to control the sewage flow to make it meet the set hydraulic load and hydraulic retention time, and then adjust the first water inlet valve I5; the second water inlet valve I6; the third water inlet valve Ⅰ7; the fourth water inlet valve Ⅰ8; the fifth water inlet valve Ⅰ9 and the sixth water inlet valve Ⅰ10, which can control the flow direction of sewage and select the wetland treatment unit. The wetland device consists of four horizontal subsurface flow constructed wetlands A, B, C and D and two surface flow constructed wetlands E and F. During operation, a single wetland unit or a series combination of multiple wetland units can be selected according to the actual needs of se...

Embodiment 2

[0049] In the test of the present invention, domestic sewage of three different concentration levels was artificially prepared, the first water inlet valve I5, the first valve 16, the second valve II17, the third valve II18, the fourth valve II19, and the fifth valve II20 were opened. Close other valves, and open the sixth water intake 26, choose the method of series combination of six wetland units A-F for treatment, the daily design treatment water volume is 30L / d, the hydraulic retention time is about 5 days, and take samples from each water intake along the way Analyze, obtain experimental data as follows table 1, table 2 and table 3:

[0050] Table 1: Low Phosphorus and Low Nitrogen Domestic Sewage (mg / L)

[0051]

TN

NH 4 + -N

NO 3 - -N

TP

COD

flooded

18.51

4.18

7.29

0.25

238.37

A

9.52

1.40

5.48

0.18

108.33

B

2.02

0.97

0.43

0.01...

Embodiment 3

[0059] Only a single surface flow wetland unit is selected to treat the sewage with three concentrations to obtain the data of the surface flow wetland, which provides a reliable basis for selecting the wetland operation mode.

[0060] Artificially prepare three kinds of domestic sewage with different concentration levels, open the fifth water inlet valve I9 ​​and the sixth water inlet valve I10, close all other valves, and open the fifth water intake 25 and the sixth water intake 26, select E and F wetlands Units are connected in parallel for treatment, the daily design treatment water volume is 10L / d, and the hydraulic retention time is about 5 days. The obtained experimental data are as follows in Table 4, Table 5 and Table 6:

[0061] Table 4: Low Phosphorus and Low Nitrogen Domestic Sewage

[0062]

[0063] Table 5: Domestic sewage with medium phosphorus and medium nitrogen

[0064]

[0065] Table 6: High phosphorus and high nitrogen domestic sewage

[0066]

...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to the water treatment field, and concretely relates to a multi-medium constructed wetland water treatment system and a treatment method thereof. The method comprises the following steps: adding sewage for treatment to enter an inlet water tank, and removing large floating materials and foreign materials in the sewage through a netted grating; allowing the obtained sewage to flow to shunting pipelines, controlling the sewage flow through a flow meter, and carrying out combination treatment by allowing the sewage to flow into a horizontal undercurrent wetland apparatus and / or a surface current wetland apparatus through the controlled closing of valves on the shunting pipelines according to the sewage concentration. The quality of water obtained after the treatment is good, the wetland purifying efficiency is increased, and the wetland obstruction is improved through the switching of the above wetland apparatuses by utilizing a combination treatment mode until the sewage for treatment is purified. The rapid switching of a single-stage wetland and a multistage wetland is realized through an ingenious valve design, so the pollutant concentration fluctuation problem of the sewage is effectively solved, and the adaptability and the application range of the wetland are improved; the running in a wetland unit switching mode is in favor of the wetland maintenance, prolongs the wetland life and effectively reduces the wetland obstruction phenomenon; and he system has a good removal effect on COD, ammonia nitrogen, nitrate nitrogen and total phosphorus in the sewage.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a multi-media artificial wetland water treatment system and a treatment method thereof. Background technique [0002] In recent years, with the rapid development of the economy and the improvement of people's living standards, the problem of water pollution caused by pollutants discharged from industry and agriculture has become increasingly serious. A large amount of sewage rich in nutrients such as nitrogen and phosphorus has been directly discharged into rivers and lakes. Even the oceans lead to eutrophication of water bodies, so water pollution control has always been a hot spot in the world's environmental and ecological research. Among the existing sewage treatment technologies, the constructed wetland sewage treatment technology has the advantages of stable effluent quality, strong ability to remove nutrients such as nitrogen and phosphorus, low infrastructure and operation ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/32
CPCY02W10/10
Inventor 于君宝侯小凯郑垒孙凯宁
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap