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Composite bio-energizer used for in-situ ecological remediation of polluted river sediment

A bio-growth-promoting agent and ecological restoration technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, water resources protection, etc. Eliminate river pollution and other problems, and achieve the effect of increasing microbial diversity and activity

Inactive Publication Date: 2013-10-30
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ex-situ remediation technology adopts measures to completely remove pollutants from the system, which can effectively reduce the pollutant output from the sediment to the overlying water body and reduce the risk of secondary pollution of rivers. However, due to its high cost, residual pollutants, Destruction of the ecological environment of the water body itself, repeated pollution, and other shortcomings cannot essentially eliminate the pollution of rivers, so in-situ restoration has gradually replaced ex-situ restoration technology and has become a research hotspot

Method used

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  • Composite bio-energizer used for in-situ ecological remediation of polluted river sediment
  • Composite bio-energizer used for in-situ ecological remediation of polluted river sediment
  • Composite bio-energizer used for in-situ ecological remediation of polluted river sediment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The sediment of the polluted river in Guangzhou City (the sediment of the Pazhou Bridge section) is used as the restoration object. The main indicators are: the dissolved oxygen (DO) of the overlying water body is 1.6mg / L, and the oxidation-reduction potential (ORP) of the sediment is -220mv. The moisture content of the sediment is 41.2%, the organic matter (TOC) content of the sediment is 2.92%, and the total microbial activity of the sediment determined by the FDA method is 0.61A / g.

[0043] At the same time, the BIOLOG ECO microplate method was used to construct the microbial diversity index (Shannon index) (background) to be 3.0.

[0044] The experiment uses a 55cm×35cm×20cm uncovered plexiglass tank as the experimental device, laying 1.2cm of bottom mud with a mass of 1350g, and adding 4L of tap water as the overlying water body.

[0045] The preparation method of compound biological growth promoter is as follows:

[0046] ① Preparation of amino acid solution: pre...

Embodiment 2

[0056] The sediment of the polluted river in Guangzhou City (the sediment of the Pazhou Bridge section) is used as the restoration object. The main indicators are: the dissolved oxygen (DO) of the overlying water body is 1.6mg / L, and the oxidation-reduction potential (ORP) of the sediment is -220mv. The moisture content of the sediment is 41.2%, the organic matter (TOC) content of the sediment is 2.92%, and the total microbial activity of the sediment determined by the FDA method is 0.61A / g.

[0057] At the same time, the BIOLOG ECO microplate method was used to construct the microbial diversity index (Shannon index) with a value of 3.0.

[0058] A 55cm×35cm×20cm uncovered plexiglass cylinder was used as the experimental device in the experiment, 1.2cm of bottom mud was laid, with a mass of 1171.6g, and 4L of tap water was added as the overlying water body.

[0059] The preparation method of compound biological growth promoter is as follows:

[0060] ① Amino acid preparation:...

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Abstract

The invention discloses composite bio-energizer used for in-situ ecological remediation of polluted river sediment. The composite bio-energizer comprises oxidant and bio-energizer. The oxidant is one or two of calcium peroxide or calcium nitrate. The bio-energizer comprises amino acid, micro-molecular organic acid, vitamin, inorganic salt and microelement. According to the characteristics of bottom sludge in a river, oxidant and bio-energizer compositions are obtained by screening, matching quality of the oxidant can be adjusted according to pollution level of the bottom sludge in the river, and ecological risk cannot be caused to the bottom sludge due to absence of microorganism. In addition, growth and reproduction of indigenous microorganism are achieved by stimulating the bottom sludge, a pollution-resistant bottom sludge micro-ecosystem is established, and remediation effect of the bottom sludge can be kept excellent for a long term. An experimental research shows that by the use of the composite bio-energizer, content of TOC (total organic carbon) in the bottom sludge can be reduced, and diversity and activity of microorganisms are increased.

Description

technical field [0001] The invention belongs to the field of ecological restoration of rivers, and in particular relates to a composite biological growth promoter for in-situ ecological restoration of polluted river sediments. Background technique [0002] Natural rivers or artificial waterways, artificial lakes, etc. used for flood control, drainage, and shipping are called river surges. River sediment is the carrier for the migration and transformation of many nutrients and pollutants in the water, providing essential elements for the growth of microorganisms and aquatic plants, and is an important link in the material cycle in the water ecosystem. [0003] Due to the special functions of urban rivers, they receive a large amount of domestic sewage, production wastewater, etc. Pollutants migrate into the sediment through various channels such as precipitation, adsorption, and biological absorption, and are continuously accumulated, resulting in high concentrations of pollu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34
CPCY02A20/402
Inventor 谢丹平刘晓伟李开明
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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