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In-situ repair method of bottom mud in city watercourse

A technology for in-situ restoration of river sediments, applied in chemical instruments and methods, sludge treatment, biological sludge treatment, etc. The effect of sediment restoration, no risk of secondary pollution, and simple operation

Inactive Publication Date: 2013-06-26
ELION ECOLOGICAL RESTORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing in-situ bioremediation technology of river channel sediment mainly adds microbial strains to the sediment. Due to the impact and dilution of water flow, the microbial biomass on the surface of the channel sediment is reduced, and it is often difficult to achieve the expected restoration effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take several bamboo tubes with a diameter of about 5cm and a length of 15cm, open up all the bamboo nodes of the bamboo tubes, and bundle them into an area of ​​1.5m 2 The round honeycomb-shaped packing unit is directly put into the bottom mud with a depth of about 10cm, and the bamboo tube is about 5cm higher than the bottom mud.

[0018] The activated carbon bottom mud repair agent with a particle size of 5mm loaded with bottom mud indigenous microorganisms was added to the bamboo tube of the honeycomb packing unit at a dose of 2L per square meter, and the in-situ restoration test of the bottom mud was carried out.

[0019] After 7 days of treatment, the CODcr and NH of the sediment 4 + -N and TP concentrations decreased by 37.2%, 41.6% and 33.3%, respectively.

Embodiment 2

[0021] Take a number of commercially available polyvinyl chloride straight tube honeycomb fillers with a tube diameter of 4cm, cut them into lengths of 20cm, and bundle them into an area of ​​2m 2 The square honeycomb packing unit is put directly into the bottom mud with a depth of about 10cm, and the packing is about 10cm higher than the bottom mud.

[0022] The zeolite sediment remediation agent with a particle size of 4 mm loaded with indigenous microorganisms in the sediment was added to the bamboo tube of the honeycomb packing unit at a dose of 2 L per square meter, and the in-situ remediation test of the sediment was carried out.

[0023] After 7 days of treatment, the CODcr and NH of the sediment 4 + -N and TP concentrations decreased by 35.4%, 44.1% and 37.6%, respectively.

[0024] It can be seen from the data of the above examples that the method for in-situ restoration of urban river sediment of the present invention has a good application effect.

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Abstract

The invention relates to an in-situ repair method of bottom mud in a city watercourse. The method specially comprises the steps of: vertically placing straight tubular cellular filler in bottom mud in a watercourse for in-situ fixing the bottom mud; then, casting a bottom mud repairer to a water body paved with the cellular filler, wherein the repairer sinks into the water body and falls into a filler tube of the cellular filler; under protection of the cellular filler, performing in-situ repair of bottom mud pollution through adsorbing and biological degrading effects of the bottom mud repairer. The method provided by the invention can establish good conditions for a healthy biological system of the watercourse, so that the water body is purified fundamentally. The method has the characteristics of good repairing effect, low cost, simpleness in operation, convenience in construction and maintenance and management, no influence on shipping function of the watercourse, no secondary pollution risk and the like.

Description

technical field [0001] The invention belongs to the technical field of urban river pollution control, in particular to a method for in-situ restoration of urban river sediment. Background technique [0002] Due to the long-term input of external sources and the deposition of aquatic biological residues, urban river sediments are enriched with a large number of pollutants, such as heavy metals, nutrients such as N and P, and refractory organic matter, which have become important secondary pollution sources of water pollution (internal pollution) sources of pollution) and pose a serious threat to human health and the environment. [0003] At present, according to the principle of different control methods, the release control technology of river polluted sediment can be divided into physical, chemical and biological methods. The physical control technology mainly includes dredging and covering method, which is effective quickly, but the amount of engineering is large, the dis...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/04
Inventor 王学江卜云洁杨连珍颜湘波赵建夫尹大强成水平夏四清
Owner ELION ECOLOGICAL RESTORATION
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