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Repairing method of water body polluting bottom mud

A restoration method and water pollution technology, applied in water/sludge/sewage treatment, sludge treatment, biological sludge treatment, etc., can solve problems such as water pollution, unsuitable growth of submerged plants, and destruction of underwater ecosystems. Achieve the effect of controlling eutrophication of water body, making up for the lack of failure in the later stage, and simple technical implementation process

Active Publication Date: 2016-08-17
HUAQIAO UNIVERSITY
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Problems solved by technology

The dredging method is widely used in China, but the existing problems are: (1) high cost; (2) damage to the underwater ecosystem; (3) sediment resuspension pollutes the water body; (4) sediment transportation and disposal process cause secondary pollution
However, the amount of pollutants adsorbed by the active material is limited, and the control of nitrogen and phosphorus will fail after the adsorption is saturated. This technology has sustainability defects. In addition, the covering layer is covered by sediment twice, which is also a problem in the practical application of this technology.
[0004] Submerged plants not only have a good effect on reducing nitrogen and phosphorus in polluted sediment and water bodies, but also can effectively inhibit sediment resuspension. However, the growth of submerged plants requires high light conditions and water transparency, and the water body is seriously polluted. The environment is basically not suitable for the growth of submerged plants. Therefore, when simply using submerged plants to remediate polluted sediment, its effect will be affected by its own growth status and water environment factors.

Method used

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Embodiment 1

[0025] A method for repairing water body polluted bottom mud, said water body polluted bottom mud is the polluted bottom mud of urban river courses and landscape lake water bodies with serious eutrophication, the repair method comprises the following steps:

[0026] (1) According to the main pollutant type and pollution load of the water body, uniformly add sediment active covering materials with a particle size of 1-4mm (preferably 1-3mm) in the water body, and the covering thickness is 2-6cm (preferably 2-5cm) ), to quickly reduce the pollutant load in the water body, improve the redox environment of the bottom water body and the surface sediment, isolate the sludge sediment and delay the release of nutrients, improve the water quality of the water body, and increase the transparency of the water body to meet the needs of the growth of submerged plants Compensating the depth of light provides a strong habitat for the growth of submerged plants. The above-mentioned specific pa...

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Abstract

The invention discloses a repairing method of water body polluting bottom mud. The water body polluting bottom mud is polluting bottom mud in water bodies of city watercourses and landscape lakes severe in eutrophication. The repairing method includes the following steps of firstly, evenly putting a bottom mud activity covering material with granularity of 1-4 mm in a water body according to the type of main pollutant in the water body and the pollution loads, wherein the covering thickness is 2-6 cm; secondly, planting submerged plants in the water body when the water quality of the water body is remarkably improved and more than one third of the water body in the water depth is improved to be transparent; thirdly, recovering the submerged plants in winter. By means of the method, emission of nitrogen and phosphorus in bottom mud can be effectively reduced, eutrophication of the water body is controlled, the technology implementation process is simple, and cost is low.

Description

technical field [0001] The invention belongs to the technical field of water environment restoration, and in particular relates to a restoration method for water body polluted sediment. Background technique [0002] With the acceleration of industrialization and urbanization in our country, the problem of eutrophication in urban rivers and lakes is becoming more and more serious. Although the government has invested a lot of money in comprehensively improving the water environment and has achieved certain results in limiting discharge and intercepting sewage, the problem of eutrophication in rivers and lakes is still particularly prominent, which has seriously affected people's life and production. Nitrogen and phosphorus are the main limiting factors of water eutrophication, and sediment is the source and sink of nitrogen and phosphorus in river and lake water. Therefore, under the condition that exogenous nitrogen and phosphorus are effectively controlled, controlling the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/02
CPCC02F11/00C02F11/02C02F2303/06
Inventor 周真明刘彤苑宝玲杨志敏刘淑坡刘啟迪李飞廖晓斌
Owner HUAQIAO UNIVERSITY
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