A matrix material suitable for constructed wetland, constructed wetland system and application

A constructed wetland system and wetland technology, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve problems such as low operating cost and insufficient dissolved oxygen, and achieve increased effective area, Inexpensive, enhanced oxidation effect

Active Publication Date: 2022-03-22
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of insufficient dissolved oxygen in the operation process of the vertical subsurface flow constructed wetland. By increasing the conductive matrix with high specific surface area, strengthening the electron transfer, and promoting the oxidation of ammonia nitrogen, it provides a high oxygen supplementation efficiency, ammonia nitrogen Vertical subsurface flow artificial wetland with good removal effect, low operating cost, and high degree of engineering application using carbon felt to conduct electricity to achieve enhanced electron supply

Method used

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  • A matrix material suitable for constructed wetland, constructed wetland system and application
  • A matrix material suitable for constructed wetland, constructed wetland system and application
  • A matrix material suitable for constructed wetland, constructed wetland system and application

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specific Embodiment approach

[0039]In order to further improve the electrical conductivity of the carbon fiber felt, the present invention also provides a pretreatment method for the carbon fiber felt, that is, using concentrated hydrochloric acid for pretreatment; specific implementation methods are as follows:

[0040] The carbon fiber felt is soaked in 8-12% concentrated hydrochloric acid and boiled for 25-35 minutes.

[0041] The second aspect of the present invention provides a constructed wetland system, characterized in that the constructed wetland system includes the matrix material described in the first aspect;

[0042] The constructed wetland system includes a main body and a drainage device. The main body part is an unsaturated area and a saturated area from top to bottom, the adsorption material is arranged in the unsaturated area, and the conductive material runs through the upper part of the unsaturated area and the saturated area. .

[0043] Preferably, aquatic plants are also planted on ...

Embodiment 1

[0064] In this embodiment, a constructed wetland system is provided. The constructed wetland system has a cylindrical outer wall made of PVC material with a diameter of 25 cm and a height of 80 cm. 10cm thick gravel (diameter 2-3cm) is laid on the lower part of the device as the support layer 4 . Vertically arrange the carbon felt cylinder 2 with a diameter of 20cm and a height of 70cm, the middle part is filled with a quartz sand layer 3 with a height of 60cm, the upper 10cm is filled with woven superfine fibers with a length of 200cm and quartz sand 1 with a diameter of 2-4mm, and a water outlet is set at the bottom of the device , and connect the soft water outlet pipe 5 to raise the water level, and control the height of the unsaturated zone to be 10cm. A perforated PVC pipe with a diameter of 5 cm was vertically inserted in the middle of each device to measure physical and chemical indicators such as dissolved oxygen (DO), oxidation-reduction potential (ORP), temperature,...

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Abstract

The invention specifically relates to a matrix material suitable for constructed wetlands, a constructed wetland system and its application. The invention adopts ultra-fine fiber as filler in the unsaturated area and carbon felt as an excellent electronic conductor, and the two are added as functional substrates to different parts of the subsurface artificial wetland. The cylindrical arrangement of the carbon felt increases the effective area for collecting electrons. In the area of ​​high dissolved oxygen, the electrons that are the products of the nitrification reaction are quickly transferred and consumed, which stimulates the efficient progress of the nitrification reaction; Growth provides abundant attachment sites, which increases microbial abundance in wetland systems. After adding carbon felt, the contribution rate of matrix adsorption to total phosphorus removal was greatly improved compared with traditional constructed wetlands.

Description

technical field [0001] The invention belongs to the technical field of ecological environment water body purification, and specifically relates to a matrix material more suitable for vertical subsurface flow constructed wetlands, a constructed wetland system using the matrix material and its application in the field of sewage treatment. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Constructed wetland is an advanced sewage treatment ecological technology proposed in 1961. The characteristics of low investment, low operation and maintenance costs, and the functions of water purification, water ecological storage, and beautification of constructed wetlands have attracted ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00C02F3/32
CPCC02F3/005C02F3/32
Inventor 张建庄林岚李向征梁爽胡振谢慧君吴海明郭子章
Owner SHANDONG UNIV
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