Method for disposing river or lake bottom mud on site

A technology of sediment and lakeshore, applied in biological sludge treatment, river remediation, climate change adaptation, etc.

Inactive Publication Date: 2014-03-26
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although dredging can effectively solve the pollution situation of rivers, since the dredged sediment still needs to be followed up, excavating corresponding waste pits for landfill, transportation and excavation costs also increase the cost of sediment dredging; and A large number of pollutants contained in the sediment will also enter the soil to cause secondary pollution and form new environmental problems
There are also many descriptions of river and lake sediment treatment methods in existing patents, such as a method of using modified zeolite to control the release of phosphorus from sediment in situ (CN103408209A), an integrated test device for river and lake dredging and sludge dehydration and drying And method (CN103408207A), multi-stage water quality ecological purification system suitable for shallow and narrow mixed water channels (CN103351084A), treatment system and treatment process for removing polluted sediment from rivers in central urban areas (CN103334469A), contaminated sediment treatment device (CN203307188U) However, most of them are limited to changing the physical and chemical properties of the sediment by physical and chemical methods, ignoring the combined effect of biology and ecology, and all need to be treated in different places, which invisibly increases the cost of transportation

Method used

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  • Method for disposing river or lake bottom mud on site

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In an artificial lake with a water depth of 1m, take the mixed substrate of sediment and put it into an ecological bag, and pile up the ecological bag at a distance of 2 meters from the lake shore to form an ecological embankment. The embankment surface is 50cm above the water surface and anchored. The bottom mud mixed matrix is ​​uniformly mixed with bottom mud, coarse material component slag, and fine material component vermiculite at a weight ratio of 40%: 40%: 20%, and then the bottom mud mixed matrix is ​​filled in the original lakeshore and ecological embankment Between, and then plant 1 shrub willow and 5 carex per square meter.

Embodiment 2

[0029] On the river bank with a water body depth of 2 m, the bottom mud is uniformly mixed with the coarse material components slag and gravel, and the fine component perlite at a weight ratio of 40%:20%:40% to form a bottom mud mixed matrix, and the bottom mud is mixed The matrix is ​​put into the ecological bag, and the ecological bag is piled up 1 meter away from the river bank to form an ecological embankment, which is anchored, and the embankment surface is 60cm above the water surface. Then fill the bottom mud mixed matrix between the original river bank and the ecological embankment, and then plant 1 shrub willow and 5 carex per square meter.

[0030]

Embodiment 3

[0032] On a river bank with a water depth of 3 m, the bottom mud was uniformly mixed with coarse material components steel slag and gravel, and fine material components perlite and volcanic ash at a weight ratio of 40%:30%:30% to form a bottom mud mixed matrix, which was taken as The bottom mud mixed matrix is ​​put into an ecological bag, and the ecological bag is piled up 1.5 meters away from the river bank to form an ecological embankment, which is anchored, and the embankment surface is 70cm above the water surface. Then fill the bottom mud mixed matrix between the original river bank and the ecological embankment, and then plant 1 shrub willow and 5 carex per square meter.

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Abstract

The invention relates to an ecological engineering technology for disposing river or lake bottom mud on site to construct an ecological revetment. River or lake bottom mud in the urban region and particle components are filled into ecological bags to be used for constructing the ecological embankment on a cement hardened river or lake bank, mixtures of bottom mud and other components are filled between the ecological bags and the original bank zone, then, plants such as bushwood and sedge with high purifying capacity are planted, and thus a system for disposing bottom mud on site is constructed. With the method, river or lake bottom mud suffering urban pollution is disposed on site, transportation cost is reduced, influences on the environment are reduced, and the bottom mud is disposed in an ecological harmless mode and recycled through a constructed compound system of bottom mud matrixes, plants and microorganisms. The formed near natural plant ecological zone can intercept and absorb surface source pollutants carried into a river or lake by surface runoffs, and pollution level is reduced.

Description

[0001] technical field [0002] The invention belongs to the technical field of environmental protection, and in particular relates to a method for treating river and lake bottom mud on site. Background technique [0003] With the rapid development of the economy and the continuous expansion of the city scale, the pollution of rivers and lakes is becoming more and more serious. Due to farmland reclamation and vegetation destruction in the watershed, soil erosion has intensified. In order to maintain the clear water landscape, the city builds dams and other facilities, which accelerates the accumulation of sediment in rivers and lakes, and affects ecological security issues such as urban water storage and flood control. Therefore, the disposal of sediments with a large amount of pollutants accumulated in rivers and lakes in urban areas has become an urgent problem for the current government and society. A large amount of organic debris, toxic and refractory substances, heav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/02E02B3/12C02F11/02
CPCY02A10/00
Inventor 何春光王忠强王天弛边红枫盛连喜杨海军
Owner NORTHEAST NORMAL UNIVERSITY
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