Method for making wetland by backfilling sludge

A silt and wetland technology, applied in the fields of filling water and building land, separation methods, chemical instruments and methods, etc., can solve the problems of multiple human and material resources, sedimentation of silt, etc., and achieve the effect of improving the ecological environment, improving water quality, and saving human and material resources.

Pending Publication Date: 2020-04-10
浙江省疏浚工程有限公司
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Problems solved by technology

[0003] However, after such dredging treatment, silt will be deposited on the bottom of the river after a perio

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  • Method for making wetland by backfilling sludge
  • Method for making wetland by backfilling sludge
  • Method for making wetland by backfilling sludge

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[0040] The present invention will be further described in detail below with reference to the accompanying drawings.

[0041] Reference figure 1 , Is a method for making wetland through silt backfilling disclosed in the present invention, including the following steps:

[0042] Step 1: Dig the silt, use the dredging equipment to dig out the silt from the lake and place it on the shore;

[0043] Step 2: Sludge filtration. The sludge is sent to the filter device for filtration, and the large solid debris is separated from the sludge through filtration;

[0044] Step 3: Passivate heavy metals, add passivating agent to the sludge, increase the pH value of the sludge, convert heavy metals into hydroxides and other precipitation, to achieve the effect of inactivating heavy metals and killing pathogens;

[0045] Step 4: The sludge is solidified, and a solidifying agent is added to the sludge to quickly solidify the sludge;

[0046] Step 5: Construct a cofferdam, construct a cofferdam on the edge...

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Abstract

The invention relates to the technical field of desilting, in particular to a method for making a wetland by backfilling sludge. The method comprises the following steps: step 1, excavating sludge; step 2, filtering sludge; step 3, passivating heavy metals; step 4, sludge solidification; step 5, building a cofferdam; step 6, backfilling sludge; and step 7, plant cultivation. The method has the advantages that plants are planted on the sludge after the sludge is backfilled, the lake ecological environment is improved, the water quality is improved, ecological balance is achieved, the lake is self-adjusted, the sludge does not need to be treated regularly and manpower and material resources are saved.

Description

Technical field [0001] The invention relates to the technical field of dredging, and in particular to a method for backfilling wetland through silt. Background technique [0002] Silt refers to the fine-grained soil containing organic matter deposited in still water and slow flowing water environment. When the lake is too silt, organic matter will increase. After bacterial decomposition, oxygen consumption will increase. The pool water is prone to lack of oxygen, causing the death of anoxic fish and shrimp. This leads to ecological damage and deterioration of water quality. Therefore, when there is too much silt in the lake, it needs to be excavated. After treatment, drying is carried out to solidify the silt and then backfilled to the lake bank. [0003] However, after such dredging treatment, silt will be deposited at the bottom of the river after a period of time. It is necessary to treat the silt regularly and invest a lot of human and material resources. Summary of the invent...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/02B01D29/03E02B3/18
CPCB01D29/03C02F11/00C02F11/008C02F11/02C02F2303/04C02F2303/06E02B3/18
Inventor 范小军马永法冯银川武艺张海燕愈慧纯
Owner 浙江省疏浚工程有限公司
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