Bottom mud in-situ remediation method

Abstract

The invention discloses a bottom mud in-situ remediation method, which comprises the following steps of: S1, dividing a to-be-remediated water area into a plurality of cells; S2, fixing remediation systems on the bottom mud of the to-be-remediated water area through a fixing piece; S3, filling grooves with growth substances, and planting aquatic plants in the grooves of the corresponding remediation systems according to the levels of the cells; and S4, controlling the opening time of a control valve according to different repair time periods, and adjusting the feeding amount of a remediation agent injected into a slow-release pipeline network. According to the method, the to-be-remediated bottom mud can be subjected to graded treatment according to the actual pollution condition; the method is high in remediation efficiency, low in cost and free of influence on natural flood discharge of water flow, an in-situ remediation means is adopted, the influence on the original ecological system of the to-be-remediated water area is small, meanwhile, a habitat environment can be created for survival of microorganisms, and reproduction of aerobic ecological communities is promoted.

Description

technical field [0001] The invention relates to the technical field of water environment restoration and treatment. More specifically, the present invention relates to a method for in-situ remediation of sediment. Background technique [0002] Eutrophication of water body is a traditional water environment treatment problem. The main reason is that the sediment at the bottom of the water body is accumulated for a long time due to seasonal stratification, and the bacteria in the mud proliferate anaerobically and explode, resulting in nitrogen, phosphorus and other nutrients in the water body. The release of salt and the proliferation of blue-green algae will cause a large increase in pollutants in the water environment, and even produce toxic substances; [0003] Therefore, it is necessary to repair or treat the sediment at the bottom of the water body. The existing methods are generally divided into physical methods, chemical methods and biological ecological methods; the p...

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Problems solved by technology

[0004] Existing sediment restoration generally uses a single physical, chemical or biological method for sediment restoration, which produces limited effects, and a single general treatment method greatly reduces the treatment effect, especially in waters with uneven distribution of pollution, especially It is a natural water area. Due to the difference in topography at the bottom of the water, the impact force of the water flow is uneven, and the thickness of the sediment accumulation is different in various places. Some parts have a large number of anaerobic bacteria, and some parts are less polluted. When a single treatment method is adopted as a whole , it will cause ecological intervention in the lightly polluted locations, resulting in the instability of the ecological system in some locations, which is also a waste of resources; in addition, the existing physical restoration system has an impact on the natural flow of water flow, under the impact of water flow The physical structure of the restoration system is unstable, with limited service life and governance effects

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