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Method for improving constructed wetland decontamination effect by changing hydraulic conditions

A technology of artificial wetlands and hydraulic conditions, applied in water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve problems such as purification of unfavorable pollutants, achieve strong decontamination effect, and improve decontamination effect Effect

Inactive Publication Date: 2017-03-08
NANJING UNIV ECOLOGICAL RES INST OF CHANGSHU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, most studies believe that the lower the hydraulic load, the longer the contact between the water body and the substrate, the more sufficient the biochemical reaction, and the better the pollutant treatment effect; Purification of pollutants, the removal rate of pollutants rises first and then decreases with the increase of hydraulic load, and there is a critical point of hydraulic load

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] In the experimental study, scintolite, slag, and zeolite were used as the matrix, and the volumes of the three matrixes were the same. The matrix is ​​divided into 3 layers in the vertical direction, from the bottom layer to the surface layer, laying stone, slag, and zeolite in sequence, with a thickness of 4cm for each layer.

[0022] The shorite used in the experiment was taken from the construction site of the School of Environment, College of Engineering, Zhengzhou University. After measurement, the dry bulk density is 1.48g / cm 3 , porosity 45.4%.

[0023] The slag used in the experiment comes from the boiling water boiler room of the Engineering College of Zhengzhou University. After measurement, the dry bulk density is U2g / cn T3 , porosity 49.3%.

[0024] The zeolite in the experiment was purchased from the Huaqiao market in Zhengzhou, and the dry bulk density was 1J7g / cn. T3 , porosity 42.8%.

[0025] Scintillite with a particle size of 1.2-2cm, slag with a p...

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PUM

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Abstract

The invention relates to a method for improving the constructed wetland decontamination effect by changing hydraulic conditions. The method comprises specific steps as follows: a, modelling of a constructed wetland; b, water inflow; c, bottom-layer aeration. By means of the method for improving the constructed wetland decontamination effect by changing the hydraulic conditions, the constructed wetland decontamination effect is effectively improved. According to the method, the gas-water ratio is controlled to be 6:1 through bottom-layer aeration, hydraulic loading is controlled, and the best decontamination effect is realized.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and particularly relates to a method for improving the decontamination effect of constructed wetlands by changing hydraulic load and aeration conditions. Background technique [0002] Constructed wetland is a new ecological engineering technology for sewage treatment developed in the 1970s. It is widely used in the purification of agricultural, industrial and domestic sewage through the synergy of substrates, plants and microorganisms. Constructed wetlands have the characteristics of low construction and operation costs, good decontamination effects, and outstanding landscape benefits, and have good application prospects. [0003] Hydraulic load refers to the volume of sewage purified per unit area of ​​substrate per day. The hydraulic load has a great influence on the microbial composition, biochemical reaction process and the removal rate of pollutants in the constructed wetlan...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F1/00C02F3/00
Inventor 安树青邱寒潘玮杨杰强张霞
Owner NANJING UNIV ECOLOGICAL RES INST OF CHANGSHU