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An ecological matrix material for promoting microbial coating and growth, its preparation method and application

A matrix material and ecological technology, which is applied in chemical instruments and methods, biological sludge treatment, water pollutants, etc. effect and other issues, to achieve significant environmental and economic benefits, easy operation, and the effect of reducing nutrient load

Active Publication Date: 2022-03-15
INST OF AQUATIC LIFE ACAD SINICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, the growth of microorganisms in sediment is easily affected by various factors such as temperature, pH, dissolved oxygen, hydraulic conditions, etc., which may affect the action of microorganisms, and it is difficult to achieve the desired effect
[0004] The present invention aims to prepare natural eco-type matrix materials that promote microbial coating and growth by modifying ecologically-friendly natural materials and mixing them in a certain proportion, and applying them to lake sediment restoration projects to effectively solve the problem of nitrogen and nitrogen removal in sediments. The number of phosphorus functional microorganisms is small, and the efficiency of nitrogen and phosphorus removal in sediment is low.

Method used

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  • An ecological matrix material for promoting microbial coating and growth, its preparation method and application
  • An ecological matrix material for promoting microbial coating and growth, its preparation method and application
  • An ecological matrix material for promoting microbial coating and growth, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A natural ecological matrix material for promoting microbial coating and growth for lake sediment restoration, which is made of the following raw materials:

[0045]

[0046] A method for preparing a natural ecological matrix material that promotes microbial coating and growth for lake sediment restoration, the steps of which are:

[0047] 1) After soaking the vermiculite in dilute hydrochloric acid mass fraction 1 or 2 or 3 or 4 or 5% for 2 or 3 hours, wash it with water until neutral (pH is 6.5 or 6.8 or 7 or 7.3 or 7.5), and place Roasting in a high-temperature oven at 300°C or 350°C or 400°C or 450°C or 500°C for 1 or 2 hours to prepare modified vermiculite for use;

[0048] 2) After soaking the medical stone in dilute hydrochloric acid with a mass fraction of 1 or 2 or 3 or 4 or 5% for 1 or 2 hours, wash it with water until neutral (pH is 6.5 or 6.7 or 6.9 or 7.1 or 7.3 or 7.5) , placed in an oven and dried at 60°C or 70°C or 80°C for 2 or 3 or 4 or 5 hours to ...

Embodiment 2－5

[0053] A kind of natural ecological matrix material that promotes microbial coating and growth for lake sediment restoration, it is made of the raw materials of following mass fraction:

[0054]

[0055] Its preparation method is identical with embodiment 1.

[0056] In the specific examples of the above 2-5, it is found through the above ratio that the prepared natural ecological matrix material that promotes microbial coating and growth can significantly increase the dissolved oxygen at the bottom of lakes or rivers, and the growth promoter can increase oxygen and improve the quality of lakes. Substrate micro-ecological environment and the promotion of microbial coating and growth. The microbial abundance increased by more than 290%, the Shannon diversity index of the microbial community on the substrate surface increased by 51%, and the functional genes involved in the carbon, nitrogen, phosphorus cycle and other processes increased by more than 260%.

Embodiment 6

[0058] An application of an ecological matrix material in lake sediment restoration, the steps are:

[0059] 1) Select a certain bottom mud restoration area in West Lake, Hangzhou City, Zhejiang Province to implement the present invention;

[0060] 2) Sprinkle the natural ecological matrix material evenly on the water surface of the lake into the bottom, with a thickness of about 4cm;

[0061] 3) After 2 months of spreading, compared with the control group without the matrix material, the microbial abundance increased by 290%, the microbial diversity increased by 430%, and the functional genes involved in the carbon, nitrogen, phosphorus cycle and other processes increased by 280%, The content of total nitrogen, total phosphorus and organic matter in the surface layer of sediment (0-10cm) decreased by 40%, 39% and 62% respectively. At the same time, the water body in the restoration area has been significantly improved, and the transparency of the water body has increased by ...

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Abstract

The invention discloses a preparation method and application of an ecological matrix material for promoting microbial coating and growth. The matrix material is composed of a certain proportion of modified vermiculite, modified medical stone and modified attapulgite. The steps are: 1) select vermiculite, medical stone and attapulgite as raw materials; 2) modify vermiculite, medical stone and attapulgite; 3) modify the modified vermiculite, modified medical stone and modified The attapulgite is mixed in a certain proportion to prepare an ecological matrix material. It also relates to the application of an ecological matrix material that promotes microbial coating and growth in lake sediment restoration. Natural ecological matrix material, environment-friendly, reasonable formula, easy to use, low cost, ecological and environmental protection, significantly improved the coating and growth rate of microorganisms, and effectively solved the lack of phosphorus and nitrogen removal function microorganisms in the process of lake sediment restoration It is beneficial to give full play to the role of microorganisms in the process of sediment remediation, and effectively control and reduce endogenous loads.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration of lakes, and more specifically relates to a preparation method of a natural ecological matrix material that promotes microbial coating and growth, and also relates to the use of a natural ecological matrix material, which can be applied to eutrophic lakes sediment restoration works. Background technique [0002] For the control of lake endogenous load, there are currently mainly methods such as sediment dredging, water diversion to clean up pollution, deep water discharge, physical and chemical coverage, and ecological restoration of aquatic plants and microorganisms. Sediment dredging can effectively remove polluted sediment, but there are disadvantages such as high cost, secondary pollution, and damage to the original sediment ecosystem of the river. Especially the treatment, disposal and resource utilization of dredged sediment are important technologies for sediment treatment. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/02C02F101/30
CPCC02F11/02C02F11/00C02F2103/007C02F2101/30
Inventor 张义吴振斌王川贺锋徐栋周巧红肖恩荣刘云利骆凤刘子森严攀
Owner INST OF AQUATIC LIFE ACAD SINICA
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