In-situ ecological restoration method for water body bottom mud

A technology of ecological restoration and sediment, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc. High degree of automation and the effect of reducing heavy metal content

Inactive Publication Date: 2020-05-08
LULIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, natural inorganic minerals are mostly used for adsorption to complete the ecological restoration of sediment, which has defects such as complicated operation process and poor water treatment effect.

Method used

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  • In-situ ecological restoration method for water body bottom mud
  • In-situ ecological restoration method for water body bottom mud
  • In-situ ecological restoration method for water body bottom mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An in-situ ecological restoration method for bottom mud of a water body is characterized in that it comprises the following steps:

[0033] S1. Based on the rectangular metal mesh frame and the modified nano-magnetic iron oxide contained in the rectangular metal mesh frame, the adsorption treatment of heavy metals in the sediment is realized;

[0034] S11. Complete the installation of the supporting mechanism, and arrange it according to a certain threshold value. The threshold value must at least satisfy that two adjacent rectangular metal mesh frames will not affect each other during work; the rectangular metal mesh frame is pressed by a driving mechanism and a supporting mechanism. A certain threshold is arranged in the river, and the lower bottom of the rectangular metal mesh frame is always located in the sediment; the driving mechanism includes a slider, a slider driving device, and an electric telescopic rod, and the supporting mechanism includes supporting frames...

Embodiment 2

[0044] An in-situ ecological restoration method for bottom mud of a water body is characterized in that it comprises the following steps:

[0045] S1. Based on the rectangular metal mesh frame and the modified nano-magnetic iron oxide contained in the rectangular metal mesh frame, the adsorption treatment of heavy metals in the sediment is realized;

[0046] S11, complete the installation of the supporting mechanism; the rectangular metal mesh frame is arranged in the river by a certain threshold through a driving mechanism and a supporting mechanism, and the lower bottom edge of the rectangular metal mesh frame is always located in the bottom mud; the driving mechanism includes a sliding block, slider driving device, and electric telescopic rod. The support mechanism includes support frames erected on both sides of the river, and a cross bar erected between the two support frames. The chute of the block drive device, the rectangular metal screen frame is fixed to the slider t...

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Abstract

The invention discloses an in-situ ecological restoration method for water body bottom mud. The in-situ ecological restoration method comprises the following steps that S1, adsorption treatment of heavy metal in the bottom mud is achieved based on a rectangular metal net frame and modified nanometer magnetic iron oxide internally loaded in the rectangular metal net frame; and S2, based on the rectangular metal net frame, the elastic filler which is internally loaded in the rectangular metal net frame and carries the bacteria-enzyme mixture, and an aeration device, the restoration treatment ofthe bottom mud is achieved. Efficient adsorption treatment of the heavy metals in the bottom mud is realized through the modified nano magnetic iron oxide, so that the content of the heavy metals in the bottom mud is greatly reduced; pollutants in the bottom mud can be effectively degraded through the bacteria-enzyme mixture and the aeration device, and secondary pollution to the bottom mud and awater body is avoided; and the whole process is simple and convenient to operate, and the automation degree is high.

Description

technical field [0001] The invention relates to the field of water environment improvement, in particular to an in-situ ecological restoration method for water bottom mud. Background technique [0002] The overlying water, the sediments at the bottom of the water body, and various surrounding environmental conditions constitute a complete water body. After entering the water body, the pollutants are finally deposited in the bottom mud through sedimentation, adsorption, biological absorption, etc., and gradually accumulate. Due to continuous enrichment and accumulation, the concentration of nitrogen and phosphorus substances, oxygen-consuming organic matter, refractory organic matter, heavy metals and other pollutants in the polluted sediment is often several orders of magnitude higher than that in the overlying water. There is a constant exchange of matter and energy between the bottom mud and the overlying water. At the same time, various pollutants in the bottom mud also m...

Claims

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Application Information

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IPC IPC(8): C02F11/02C02F11/00C02F101/20
CPCC02F11/00C02F11/02C02F2101/20
Inventor 李杰锋呼文军
Owner LULIANG UNIV
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