Liner type sediment ecological restoration system

An ecological restoration and liner technology, applied in the direction of biological sludge treatment, etc., can solve the problems of affecting the activity and microbial activity, changing the shape of the lake bottom, endangering the water body and organisms, etc., to achieve easy storage and transportation, good water permeability, and good for bedding Effect

Active Publication Date: 2012-09-12
TIANJIN YIMING ENVIRONMENTAL TECH CO LTD
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AI Technical Summary

Problems solved by technology

This method can remove large pieces of pollutants and achieve the purpose of increasing capacity, but sediment dredging will affect the activity of extracellular enzymes and microorganisms in the sediment, thereby affecting the cycle of biogenic elements in the sediment, and excessive dredging will destroy The shape of the lake bottom will be drastically changed, which will make it more difficult for the possible lake bottom vegetation restoration and reconstruction projects to be carried out in the future, and the operation is complicated, the treatment cost is high, and it is difficult to remove all pollutants. The remaining pollutants will continue to endanger water bodies and organisms.

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  • Liner type sediment ecological restoration system
  • Liner type sediment ecological restoration system
  • Liner type sediment ecological restoration system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The dense mesh structure (2) of the outer layer of the liner (1) is made of anti-aging plastic, the thickness of the liner (1) is 0.1cm and the area is 49m 2 The square, the inner packing (3) adopts zeolite.

[0016] Choose within 1500m of Tianjin Urban Construction Institute 2 The artificial lake is used as the experimental site, and an area of ​​20 × 20 m is enclosed by an anti-seepage board as the isolation experimental area, and the liner (1) is covered on the upper part of the polluted sediment, leaving a certain gap between each two rows of liners (1). as attached figure 2 ). Select 10 points in the test area as sampling points. After the liner is covered for 30 days, use the GPS positioning system to determine the sampling point, gently lift the liner (1) with a hook, and use a large-diameter cylindrical sampler equipped with a φ110mm×1000mm PVC pipe. , and collect 10 sediment columnar samples at the lower part of the liner (1). The upper and lower ends of a...

Embodiment 2

[0021] The dense mesh structure (2) of the outer layer of the liner (1) is made of reinforcement, the thickness of the liner (1) is 25cm, and the area is 20m 2 , and the inner filler (3) is made of calcite.

[0022] The experimental environment, liner (1) covering, sediment sampling, data measurement, and standard limits are all the same as in Example 1. The measurement results are shown in Table 2:

[0023] Table 2 Changes in bulk density of sediment and the contents of TN and TP in overlying water before and after lining

[0024]

Embodiment 3

[0026] The dense mesh structure (2) of the outer layer of the liner (1) is made of anti-corrosion treated hemp rope. The thickness of the liner (1) is 50cm and the area is about 1m 2 It is nearly circular, and the inner filler (3) adopts ceramsite and adds heavy metal stabilizer.

[0027] The experimental environment, liner (1) covering, and sediment sampling are the same as those in Example 1, and the methods for measuring bulk density, TN and TP, and the standard limits of TN and TP are also the same as those in Example 1. The measurement results are shown in Table 3.

[0028] At the same time, the content of heavy metals in the sediment at 20 cm was determined. The leaching method of heavy metals in sediment is in accordance with HJ / T300-2007 "Solid Waste Leaching Toxicity Leaching Method Acetic Acid Buffer Method", and the content limit of heavy metal leaching solution refers to GB 16889-2008 "Standard for Pollution Control of Domestic Waste Landfills", and atomic absorpt...

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Abstract

The invention relates to a liner type sediment ecological restoration technology. Fillers are filled in liners, outer packaging layers are of net structures, and a way of continuous packaging is used. The liners are covered on the upper portion of polluted sediments, a certain gap can be reserved between each two adjacent rows of the liners, the area of each of the liners is 0.5-50 square meters, the thickness of each of the liners is 0.1-50cm, and overlook surfaces are one of shapes of a square, a polygon, a circle and other optional shapes. The fillers in the liners have the effects of absorbing retardant pollutants, restoring the sediments, overlaying water, simultaneously compacting the sediments and preventing the polluted sediments from resuspending, and agentia for promoting the restoration of the polluted sediments and the water body can be covered on the fillers or added into the fillers according to the polluted condition of the sediments and the water body environment. The liner type sediment ecological restoration technology is an in situ capping restoration technology which has a small influence on a water body ecological system, is capable of restoring the polluted sediments by purposefully selecting technology combinations, and is not influenced by water transportation, and finally the purposes of sediment compaction and reservoir capacity enlarging are achieved.

Description

technical field [0001] The invention belongs to the restoration technology of polluted bottom mud, and particularly relates to a cushion type bottom mud in-situ ecological restoration technology. Background technique [0002] Sediment pollution of water bodies is a worldwide environmental problem. With the rapid development of industrialization, a considerable part of the large amount of refractory pollutants discharged has accumulated in the sediment of the water body. After the pollutants enter the water body, they are adsorbed, complexed, flocculated and settled by the water particles and deposited in the sediment. The upper part of the sediment has a layer of flocculated ultra-soft sludge with a small specific gravity and a fluidity close to liquid, called floating sludge, which is easily affected by water traffic and suspends. It will be released from the sediment and become the main source of water pollution, affecting the water quality of the overlying water, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02
Inventor 王娟娟张曙光王建伟杨学东
Owner TIANJIN YIMING ENVIRONMENTAL TECH CO LTD
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