CN206266322U - A kind of micro- polluted river home position strengthening denitrogenation ecological floating bed device - Google Patents

Abstract

The utility model is related to micro- polluted river home position strengthening denitrogenation ecological floating bed device, micro- polluted river water C/N can effectively be solved relatively low, the available carbon source of microorganism is not enough, the relatively low problem of TN clearances, including floating bed frame and emergent aquactic plant, floating bed frame is made up of the floating bed inner frame 3 of outside rectangular floating bed outer framework 2 and its in-house network trellis, lower portion has the permeable planting groove 4 of plant, the permeable planting groove of plant is built with floating bed matrix 5 and the emergent aquactic plant 1 being planted in matrix, the bottom of floating bed frame is equipped with strip nonrigid connector 11 vertically downward, series connection is equipped with cavity filling ball 10 on connector 11, slow release carbon source ecological matrix 9 is positioned in cavity filling ball 10, the corner bottom of floating bed outer framework 2 is connected by connecting rope 6 with the spud pile 7 being fixed on riverbed 8；The utility model is suitable for the purified treatment of river course, Hu Ku and landscape water body, simple installation, economical and practical with water surface beautification and water purification.

Description

An ecological floating bed device for in-situ enhanced denitrification of slightly polluted rivers

technical field

The utility model relates to the field of in-situ purification of rivers, in particular to an ecological floating bed device for in-situ enhanced denitrification of slightly polluted rivers.

Background technique

As an important carrier of resources and environment, rivers are related to the safety of human survival and the sustainable development of society. The massive discharge of pollutants in the process of industrialization and urbanization has resulted in varying degrees of pollution in my country's rivers. With the gradual improvement of sewage treatment facilities and the advancement of pollution control technology, the pollution levels of COD and ammonia nitrogen in rivers have decreased. However, at the same time, there are still problems such as insufficient number of indigenous denitrification microorganisms, poor biodegradability of river water, and unbalanced carbon-nitrogen ratio, which lead to slow nitrification, inhibited denitrification, and difficulty in completely removing nitrogen. Eutrophication occurs. Therefore, increasing the number of nitrifying bacteria, moderately increasing carbon sources, and promoting denitrification are of great significance for the enhanced denitrification of polluted rivers.

Ecological floating bed technology is a traditional water quality improvement technology for nutrient water bodies, which mainly removes pollutants in water bodies through the assimilation of aquatic plants and the biological oxidation of microorganisms on the surface of roots and stems and leaves. In recent years, many researchers have greatly improved the water purification effect of ecological floating beds by introducing artificial synthetic fillers, biological immobilization technology, and ion beam mutagenesis technology into ecological floating beds. widely used. Natural solid organic matter rich in cellulose such as rice straw, sycamore leaves, and corncobs can slowly release carbon sources, provide electron acceptors for denitrifying bacteria, and improve nitrogen removal efficiency. At present, there are no related reports on the combination of slow-release carbon source materials, artificial synthetic fillers and traditional floating beds, and use them in the in-situ purification technology of slightly polluted rivers.

Contents of the invention

In view of the above situation, in order to overcome the defects of the prior art, the purpose of this utility model is to provide an in-situ enhanced denitrification ecological floating bed device for micro-polluted rivers, which can effectively solve the problem of low C/N in micro-polluted river water and the availability of microorganisms. Insufficient carbon source, denitrification is inhibited, and TN removal rate is low.

The technical scheme solved by the utility model is an ecological floating bed device for in-situ enhanced denitrification of slightly polluted rivers, including a floating bed frame and emergent plants. The inner frame 3 of the floating bed is composed of a plant permeable planting groove 4 inside the frame, and a floating bed substrate 5 and emergent plants 1 planted in the substrate are arranged in the plant permeable planting groove. The connecting body 11 is equipped with hollow packing balls 10 in series, the slow-release carbon source ecological matrix 9 is placed in the hollow packing balls 10, and the four corners of the floating bed outer frame 2 are fixed on the river bed 8 through the connecting rope 6 and the fixed Pile 7 connected;

The outer frame 2 of the floating bed is a rectangular frame structure formed by connecting four hollow tubes made of polystyrene end to end, and is fastened together with the inner frame 3 of the floating bed, and the inner frame 3 of the floating bed is a grid made of PVC grid structure, the four sides of each grid have grooves for embedding the plant permeable planting groove 4;

The plant permeable planting groove 4 is a rectangular plate with meshes made of polystyrene. There are connecting grooves on the four sides that are nested and fixed with the grooves on the inner frame 3 of the floating bed. , Emergent plants 1 are planted in the floating bed matrix 5 in the planting nest.

The utility model adopts the slow-release carbon source ecological matrix, which can improve the problem of insufficient carbon source for river denitrification, and improve the removal effect of the ecological floating bed on total nitrogen; the adopted three-dimensional filler has a large specific surface area, which provides sufficient attachment growth for microorganisms space. The lightweight filter materials such as ceramsite, volcanic rock, and oyster shells used have a porous structure and are good pollutant adsorption materials and biofilm carriers. They can help remove nitrogen, phosphorus, organic matter and other pollutants while fixing plants. ;Suitable for the purification of natural rivers, lakes and landscape water bodies, and has the dual functions of water surface beautification and water quality purification, easy to install, economical and practical.

Description of drawings

Fig. 1 is the top view of the utility model.

Fig. 2 is a side sectional view of the utility model.

detailed description

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in detail.

As shown in Fig. 1-Fig. 2, a kind of micro-polluted river in-situ strengthening denitrification ecological floating bed device of the present utility model comprises a floating bed frame and emergent plants, and the floating bed frame is composed of a rectangular floating bed outer frame 2 outside and its inside The grid-shaped floating bed inner frame 3 is formed, and there is a plant permeable planting groove 4 inside the frame, and a floating bed substrate 5 and emergent plants 1 planted in the substrate are housed in the plant permeable planting groove, and the bottom of the floating bed frame is equipped with a vertically downward long Strip-shaped elastic connector 11, hollow filler balls 10 are installed in series on the connector 11, the slow-release carbon source ecological matrix 9 is placed in the hollow filler ball 10, the four corners of the floating bed outer frame 2 are fixed on the river bed 8 by connecting ropes 6 The fixed piles 7 on the top are connected; prevent the floating bed floating on the water surface from being washed away by the water; the floating bed device floats on the water surface through the fixed assembly, and multiple devices can be connected and alternately placed in the river to enhance the purification effect; by giving full play to the plants, The synergistic purification effect of microorganisms and matrix fillers strengthens the role of microorganisms in water bodies, enriches the habitat of aquatic organisms, enhances the self-purification ability of water bodies, and beautifies the water surface environment;

The floating bed matrix 5 is composed of ceramsite, volcanic rock and oyster shell, from bottom to top is ceramsite, volcanic rock and oyster shell, with a thickness of 3 cm and a matrix particle size of 6-8 mm.

The slow-release carbon source ecological matrix 9 is particles with a particle size of 9-12 mm.

The hollow filler ball 10 is a plastic porous hollow ball with a diameter of 6 cm, and the elongated elastic connector 11 is composed of a central rope made of polyolefin and filaments connected together radially on the rope.

The device described in the utility model is used for in-situ ecological restoration of natural rivers, lakes, landscape water bodies, etc., and is especially suitable for enhanced denitrification of rivers with slight pollution and low carbon-to-nitrogen ratio.

The floating bed device floats on the water surface through the fixed components, and multiple devices can be connected and alternately placed in the river to enhance the purification effect.

The utility model relates to an in-situ enhanced denitrification ecological floating bed device for slightly polluted rivers, which is composed of a floating bed frame, emergent plants, combined fillers and fixed components, etc., and can be used for in-situ ecological restoration of natural rivers, lakes, landscape water bodies, etc. , especially suitable for enhanced denitrification of rivers with slight pollution and low carbon-to-nitrogen ratio. The utility model can give full play to the synergistic purification effect of plants, microorganisms and matrix fillers, strengthen the effect of microorganisms in the water body, enrich the habitat environment of aquatic organisms, enhance the self-purification ability of the water body, and beautify the water surface environment.

The utility model has the following prominent substantive features:

1 The utility model constructs the basic shape of the ecological floating bed through the main frame, supports the main frame through the PVC grid, keeps the frame from deforming, and forms a planting grid, and the permeable planting groove and the inner frame grid are connected to each other through the card slot, which is convenient for transportation and Install. Polystyrene, PVC and other materials are used to ensure that the buoyancy meets the requirements.

2 The utility model designs the aquatic plant planting tank as a mesh structure, increases the exchange interface between the atmosphere and the water surface, improves the air permeability of the floating bed, and at the same time ensures that the matrix material and plant roots in the planting tank are in full contact with the water body, and exerts the full potential of the substrate, plants, and microorganisms. synergistic purification effect.

3 The utility model uses plants to absorb nitrogen, phosphorus and other substances in the water body to improve the transparency of the water body and balance the pH value. In addition, the plants have reoxygenation effect, can supplement the dissolved oxygen in the water, and form an aerobic microenvironment in the root system, which is conducive to aerobic The growth of microorganisms promotes nitrification and oxidative decomposition of organic matter.

4. The utility model adds slow-release carbon source composite filler to the traditional ecological floating bed, which solves the problem of difficult denitrification under the condition of low carbon-nitrogen ratio in the whole system. The composite filler suspended under the ecological floating bed is composed of slow-release carbon source ecological matrix, Composed of hollow filler balls and three-dimensional elastic fillers, the three serve as microbial adsorption and fixed carriers, providing sufficient growth space and various microenvironmental conditions for various aerobic, facultative and anaerobic bacteria, and the slow-release carbon source ecological matrix can release carbon. The source is used by denitrifying bacteria to improve the removal efficiency of total nitrogen. Facultative bacteria can degrade organic pollutants in water, and the salt nutrient products produced can be absorbed by emergent plants. At the same time, plant rhizosphere secretes oxygen into nitrifying bacteria and other aerobic bacteria. Provide oxygen to promote the removal of ammonia nitrogen and organic matter.

The following is a specific implementation example of the utility model. The object of implementation is a section of urban river, and 5 points are detected on the river section. The main detection indicators are dissolved oxygen, chemical oxygen demand (COD), ammonia nitrogen and total nitrogen. Before river purification, the dissolved oxygen content in the water was 2.04 mg/L, the COD concentration was 36.47 mg/L, the ammonia nitrogen concentration was 5.97 mg/L, and the total nitrogen concentration was 6.76 mg/L. After adopting the device of the utility model to purify, the dissolved oxygen content of the river water is 3.52 mg/L and the oxygenation is about 72%, the COD concentration is 23.29 mg/L, and the removal rate is about 36%, and the ammonia nitrogen concentration is 1.82 mg/L, and the removal rate is 69% %, the total nitrogen concentration is 3.41 mg/L, and the removal rate is about 50%. The removal rates of COD, ammonia nitrogen and total nitrogen are respectively 10%, 15% and 20% higher than that of ordinary ecological floating beds.

Compared with the existing technology, the utility model has the following beneficial effects: the slow-release carbon source ecological matrix can improve the problem of insufficient carbon source for river denitrification, and improve the removal effect of the ecological floating bed on total nitrogen; the adopted three-dimensional filler has The large specific surface area provides sufficient attachment and growth space for microorganisms. The light filter materials such as ceramsite, volcanic rock, and oyster shells used have a porous structure and are good pollutant adsorption materials and biofilm carriers. They can help remove nitrogen, phosphorus, organic matter and other pollutants while fixing plants. ;Suitable for the purification treatment of natural rivers, lakes and landscape water bodies, and has dual functions of water surface beautification and water quality purification, easy to install, economical and practical.

Claims (4)

1. An ecological floating bed device for in-situ enhanced denitrification of slightly polluted rivers, comprising a floating bed frame and emergent plants, characterized in that the floating bed frame is composed of a rectangular floating bed outer frame (2) and an internal grid-like The floating bed is composed of an inner frame (3). There is a plant permeable planting groove (4) inside the frame. The plant permeable planting groove is equipped with a floating bed substrate (5) and emergent plants (1) planted in the substrate. The lower part of the floating bed frame is equipped with a vertical The downward strip-shaped elastic connector (11), the connector (11) is equipped with hollow filler balls (10) in series, and the slow-release carbon source ecological matrix (9) is placed in the hollow filler ball (10), and the floating bed The lower part of the four corners of the frame (2) is connected with the fixed pile (7) fixed on the river bed (8) through the connecting rope (6); The outer frame (2) of the floating bed is a rectangular frame structure formed by connecting four hollow tubes made of polystyrene end to end, and is fastened together with the inner frame (3) of the floating bed. The inner frame (3) of the floating bed is A grid-like grid structure made of PVC, each grid has grooves for embedding the permeable planting grooves (4) on the four sides; The plant permeable planting groove (4) is a rectangular plate with meshes made of polystyrene, and there are connection grooves on the four sides that are nested and fixed with the grooves on the inner frame (3) of the floating bed, and the center is a conical depression As a plant planting nest, emergent plants (1) are planted in the floating bed matrix (5) in the plant planting nest. 2. The ecological floating bed device for in-situ enhanced denitrification of slightly polluted rivers according to claim 1, characterized in that the floating bed matrix (5) is composed of ceramsite, volcanic rock and oyster shells, from bottom to top are ceramsite, Volcanic rock and oyster shell, with a thickness of 3 cm and a matrix particle size of 6-8 mm. 3. The in-situ enhanced denitrification ecological floating bed device for slightly polluted rivers according to claim 1, characterized in that the slow-release carbon source ecological matrix (9) is a particle with a particle size of 9-12 mm. 4. The in-situ enhanced denitrification ecological floating bed device for slightly polluted rivers according to claim 1, characterized in that, the hollow filler ball (10) is a plastic porous hollow ball with a diameter of 6 cm, and the strip-shaped elastic connection The body (11) is made of a central rope body made of polyolefin and wire strips radially connected together on the rope body.