Method for treatment and in-situ ecological restoration of black and stink riverway by using microorganism

An ecological restoration and microbial technology, applied in the field of pollution control, can solve the problems of inability to carry out follow-up treatment, large floor area, and large engineering operation volume

Inactive Publication Date: 2011-05-11
赵亚勋 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Pollution interception method: it is a method commonly used to control the entry of exogenous pollutants, which can only prevent the entry of pollutants, and has little effect on improving water quality;
[0005] 2. Desilting method: It is a method commonly used at home and abroad to control bottom pollution, but it has a large amount of engineering operations, high cost, cannot carry out subsequent treatment, and easily causes secondary pollution;
[0006] 3. Biological carrier method: It can be used to adsorb some suspended solids, organic matter and other nutrients in the initial stage. It is difficult to replace after saturation, its sustainability and stability are not guaranteed, and the cost is high, so it cannot be adopted on a large scale;
[0007] 4. Constructed wetland method: its purification process involves comprehensive effects of physics, chemistry, and biology. It can be used to reduce point and non-point source pollution loads such as agriculture, roads, and towns. However, it occupies a large area, and the design and operation parameters are vague. The water conservancy is complex and susceptible to pests and diseases;
[0008] 5. Stabilized pond method: It has the advantages of simple structure, low infrastructure operation cost, and high removal efficiency, but there are problems such as large land occupation and serious sediment deposition

Method used

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  • Method for treatment and in-situ ecological restoration of black and stink riverway by using microorganism
  • Method for treatment and in-situ ecological restoration of black and stink riverway by using microorganism
  • Method for treatment and in-situ ecological restoration of black and stink riverway by using microorganism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1: River treatment in an old city

[0049] The river in an old city is about 5,200 meters long, 20 meters wide, 1-1.2 meters deep, and 0.8-1.0 meters thick. Due to the natural discharge of a large amount of domestic sewage and a small amount of industrial sewage, the river water has been seriously polluted for a long time. The water blooms in the river are serious, showing eutrophication, the water body is black and smelly, the transparency is low, the silt is black, and there are many white garbage and oil pollution on the river surface. Before the treatment of this river course, the whole project treatment cycle is first divided into three stages, a total of 20 months. In the early stage, the auxiliary engineering facilities will be completed in 4 months, and aeration equipment will be installed. Bottom aeration equipment will be installed at 1 / 10 of the length of the river, and a water surface aeration equipment will be installed every 50 meters of the remai...

Embodiment 2

[0097] Example 2: River management in a certain city

[0098] The river in an old city is about 4600 meters long, 16 meters wide, 0.8-1.0 meters deep, and 0.1-0.3 meters thick. This river has a long course, long time for pollutants to be deposited at the bottom, complex geographical conditions, uneven topography, complex geological environment, large catchment area, wide sources, various types of catchment, and multiple point source pollution. Extensive non-point source pollution exists.

[0099] The stage work of governance cycle and other steps of the inventive method are the same as embodiment 1,

[0100] In the step (2), the sewage samples of black and odorous rivers are collected, enriched, isolated and cultivated, and 20 photosynthetic bacterial strains are screened out;

[0101] Wherein, the method of enrichment, separation and cultivation in this step is:

[0102] Medium:

[0103] Preparation method of enriched medium: weigh NH 4 Cl 1.5g, K 2 HPO 4 0.2g, MgSO ...

Embodiment 3

[0124] Example 3: Treatment of a certain river in Shipai Town, Dongguan City

[0125] The total length of the river is about 5km, the water depth is 0.5-2.0m, the sludge is 0.5-0.8m, the average width is 20m, and the total volume is 150,000m 3 , the flow rate is 3-8m / min. This river is dominated by domestic sewage. A small amount of industrial sewage of various colors is black after confluence. There are about 6,000 tons of printing and dyeing sewage and 54,000 tons of domestic sewage every day. The water quality of the river is seriously black and smelly, and a large number of Black silt, bottom mud thickness reaches 0.8 meters.

[0126] The stage work of governance cycle and other steps of the inventive method are the same as embodiment 1,

[0127] In the step (2), the sewage samples of black and odorous rivers were collected, enriched, isolated and cultured, and 42 strains of photosynthetic bacteria were screened out;

[0128] Wherein, the method of enrichment, separatio...

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Abstract

The invention discloses a method for treatment and in-situ ecological restoration of a black and stink riverway by using microorganism. The invention is characterized in that target strains with pertinence are selected from sewage and then matched and combined with the existing strains to form compound microbial agents; and the sewage in the riverway is treated by using the matched compound microbial agents. In the invention, according to the specific pollution conditions of the riverway, the selected strains which are grown in the sewage are used to treat the sewage in the riverway, and the strains are matched and combined with the existing strains aiming at the pollution conditions of the water body in the riverway, so that the strains can exert synergistic effects in a microorganism sewage treatment system, thereby rapidly forming superior floras so as to decompose, absorb and transfer pollutants in the riverway and then achieving the optimum treatment efficiency. In the invention, the microorganism is firstly used to treat the water body, and then the water body is treated through the self-cleaning capability of the water body, thereby reaching the purpose of curing the exterior and the inherence and not generating secondary pollution. The method has the characteristics of safety, high efficiency, low cost, small investment and the like, and is simple to operate.

Description

technical field [0001] The invention relates to a method for controlling pollution, in particular to a method for in-situ ecological restoration of black and odorous river courses by microorganisms. Background technique [0002] River pollution is one of the environmental pollution problems that the society is increasingly concerned about. Due to intensive human activities, pollutants are discharged irregularly, resulting in serious pollution of rivers. For example, domestic garbage and domestic sewage, which are the main sources of exogenous pollution, are discharged into the river, causing a large amount of organic waste and humus to be deposited on the bottom of the river, reducing the concentration of dissolved oxygen in the water and increasing the anaerobic environment at the bottom of the river. The organic matter fermented and rotted, producing excessive sulfides and harmful gases, resulting in the extinction of fish and shrimp, and the subsequent sediment coverage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/32
CPCY02A20/402
Inventor 赵亚勋欧阳吾烨李燕平雷英达
Owner 赵亚勋
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