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A method for in-situ control of polluted pond sediment

A sediment and in-situ technology, which is applied in the field of in-situ control of polluted lake and pond sediment, can solve the problems of low concentration of effective degradation bacteria, weak competition of indigenous bacteria, and easy loss of bacteria, so as to achieve good repair effect and reduce bacterial contamination. The loss of species, the effect of easy separation

Active Publication Date: 2019-10-25
GUANGXI UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional in-situ biotechnology of sediments uses free dominant bacteria, which has disadvantages such as low concentration of effective degrading bacteria per unit volume, easy loss of bacteria under severe water conservancy conditions, and weak competition with indigenous bacteria.

Method used

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  • A method for in-situ control of polluted pond sediment

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Embodiment 1

[0014] Embodiment 1: Using the method of the present invention to carry out in-situ remediation experiments on the bottom mud of polluted lakes and ponds and its overlying water.

[0015] Such as figure 1 As shown, a plexiglass column is used as a reactor to simulate the longitudinal distribution of natural lake water and sediment. Reactor 1 has a total height of 100 cm, a length and a width of 20 cm, bottom mud 8 is 20 cm deep, and water depth is 60 cm. The effective volume is 32L; in the reactor 1, the immobilized microbial carrier column 2 is set at the mud-water interface by hanging. The microporous aeration device 3 includes an aeration head and an air compressor 4 connected to the aeration head through an air supply conduit, and an air supply volume regulating valve 5 is arranged on the air supply conduit. The aeration head is 15 cm long and 2 cm in diameter, and is placed in the immobilized microbial carrier column 2 . The reactor 1 is provided with sediment sampling ...

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Abstract

The invention discloses an in-situ control method for polluted lake and pond sediment. An immobilized microbial device is hung and fixed on a lake and pond mud and water interface, a micro-porous aeration device comprises an aeration head and an air compressor, the aeration head is placed in a microbial carrier of the immobilized microbial device, and the air compressor is connected with the aeration head through an air supply conduit; aeration is performed by the micro-porous aeration device, dissolved oxygen is provided for sediment and lake and pond water, and microorganisms propagated in the immobilized microbial device are diffused in the sediment and the lake and pond water. With the adoption of the method, a thick brown oxide layer is formed on the surface of the sediment, becomes a natural masking agent, stops release of lower-layer sediment pollutants and plays a masking and covering role; the masking agent cannot increase the size of the sediment and is also applicable to shallow water areas; the masking agent causes no damage to an aquatic environment system and can provide habitats for the microorganisms; maintenance is convenient, start is quick, operation is simple, energy consumption is low, no secondary pollution is caused, and separation is easy.

Description

technical field [0001] The invention belongs to the field of water environment treatment, and in particular relates to a method for in-situ control of polluted lake bottom mud. Background technique [0002] With the development of cities and the acceleration of industrialization, a large amount of wastewater is discharged into urban rivers and lakes. Due to the lack of timely and effective treatment, a large number of pollutants are deposited in the bottom mud. When the water environment changes, the pollutants in the bottom mud It is re-released into the overlying water and becomes a secondary pollution source. In recent years, with the control of exogenous pollution, the release of sediment pollutants has become the main source of pollution affecting water quality in rivers and lakes. Especially in closed landscape lakes and ponds, the release of sediment nutrients has gradually become the main cause of eutrophication in lakes and ponds. Studies have shown that when the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/02C02F3/00C02F3/02
CPCC02F3/00C02F3/02C02F11/02C02F2103/007Y02W10/10Y02W10/20
Inventor 冼萍唐海芳冯晓娟黄宇钊李桃拜俊岑梁韩英
Owner GUANGXI UNIV
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