An aquatic substrate remediation matrix bioprocessing apparatus

Abstract

The utility model relates to a kind of water body substrate repair matrix biological treatment device, including sand layer laid on rammed original soil layer, sand layer uses medium coarse sand with 2mm-5mm particle size, volcanic rock block with 1mm-5mm particle size is evenly input in sand layer, slow-release carbon source is evenly input in sand layer.This substrate repair matrix is due to the import of volcanic rock block, with higher void ratio, loose structure, good permeability, and complex composition material, basic nutrient substance is rich, lay foundation for more fully occur physical chemistry reaction and biochemical reaction occurrence;Medium coarse sand aggregate improves the permeability of substrate, improves the adsorption mineralization capacity of substrate to pollutant;Meanwhile, volcanic rock block has good removal effect to total phosphorus;Slow-release carbon source can quickly stimulate the activity of beneficial bacteria, while continuously providing carbon source for denitrification process, make up the problem of insufficient denitrification carbon source in water body, enhance the removal rate of total nitrogen in water body.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a biological treatment device for water body substrate remediation matrix. Background Technology

[0002] The substrate in rivers and lakes provides a foundation for the growth of wetland plants, offers habitat for a large number of microorganisms, and is one of the main interfaces for water and soil exchange, playing an important role in water purification. However, in damaged substrates of natural water bodies, especially those that have been polluted for a long time, the substrate deposits and adsorbs large amounts of pollutants such as organic matter, nitrogen, and phosphorus. The substrate's permeability decreases, the degradation rate of pollutants slows down, and it loses its water purification function. Furthermore, the release of nitrogen and phosphorus from the sediment is one of the main reasons for excessive nitrogen and phosphorus levels in water bodies.

[0003] Existing substrate remediation technologies have the following shortcomings: 1. Poor substrate permeability, small contact area with water, and insufficient reaction result in low pollutant removal efficiency; 2. Low total phosphorus adsorption rate and small adsorption capacity in the substrate, easy rebound, and easy to be affected by dissolved oxygen and redox potential, leading to phosphorus release; 3. Poor total nitrogen removal capacity of the substrate, lack of sustainable and slow release of carbon sources that do not form organic pollution in the water, and a small number of denitrifying bacteria. Utility Model Content

[0004] The purpose of this invention is to provide a biological treatment device for water body substrate remediation matrix, thereby solving the aforementioned problems in the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A biological treatment device for water body substrate remediation includes a sand layer laid on a compacted original soil layer. The sand layer uses medium-coarse sand with a particle size of 2mm-5mm. Volcanic rock blocks with a particle size of 1mm-5mm are uniformly added into the sand layer, and a slow-release carbon source is uniformly added into the sand layer.

[0006] The beneficial effects of this invention are as follows: The substrate remediation matrix, due to the introduction of volcanic rock blocks, has a high porosity, loose structure, and good permeability, exhibiting excellent adsorption and filtration performance and a high capacity for pollutant accumulation. Furthermore, its complex composition and rich basic nutrients lay the foundation for more complete physicochemical and biochemical reactions, resulting in a rich variety of biological species and a large biomass. The medium-coarse sand aggregate improves the permeability of the substrate, enhances the exchange of substances between the water and the substrate, and improves the substrate's adsorption and mineralization capacity for pollutants. Simultaneously, the volcanic rock blocks have a good removal effect on total phosphorus. The slow-release carbon source can rapidly stimulate the activity of beneficial bacteria while continuously providing carbon sources for the denitrification process, compensating for the insufficient denitrification carbon source in the water and greatly enhancing the removal rate of TN (total nitrogen) in the water.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the volume ratio of medium-coarse sand, volcanic rock blocks, and slow-release carbon sources used in the sand layer is 75%-77%: 20%: 3-5%.

[0009] Furthermore, the volume ratio of medium-coarse sand, volcanic rock blocks, and slow-release carbon source used in the sand layer is 77%:20%:3%.

[0010] Furthermore, the total height after adding volcanic rock blocks and slow-release carbon sources into the sand layer is 0.5m.

[0011] Furthermore, the bacterial strains were evenly introduced into the sand layer.

[0012] The further beneficial effects of adopting the above are: by improving the microbial community system in the bed through the dominant role of beneficial bacteria in the strain, improving the ecological chain of microorganisms, thereby effectively removing pollutants such as NH3, P, H2S, organic acids, and pesticides from the water, inhibiting the reproduction of harmful algae in the water, regulating the balance of algal, bacterial and planktonic phases in the water, and improving the purification efficiency of wastewater. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a biological treatment device for water body substrate remediation matrix according to the present invention.

[0014] The attached diagram lists the components represented by each number as follows: 1. Aquatic plants; 2. Sand layer; 3. Volcanic rock; 4. Microbial strains; 5. Slow-release carbon source; 6. Compacted original soil layer. Detailed Implementation

[0015] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0016] Example 1 like Figure 1 As shown, a biological treatment device for water body substrate remediation includes a sand layer 2 laid on a compacted original soil layer 6. The sand layer 2 is made of medium-coarse sand with a particle size of 2mm-5mm. Volcanic rock blocks 3 with a particle size of 1mm-5mm are uniformly added into the sand layer 2. Slow-release carbon source 5 is uniformly added into the sand layer 2.

[0017] The substrate for remediation, due to the introduction of volcanic rock blocks 3, possesses high porosity, a loose structure, and good permeability, exhibiting excellent adsorption and filtration performance and a high capacity for pollutant accumulation. Furthermore, its complex composition and rich basic nutrients lay the foundation for more complete physicochemical and biochemical reactions, resulting in a rich variety of biological species and a large biomass. Medium-coarse sand aggregate enhances the substrate's permeability, strengthens the exchange of substances between the water and the substrate, and improves the substrate's adsorption and mineralization capacity for pollutants. Simultaneously, volcanic rock blocks 3 have a good removal effect on total phosphorus. Slow-release carbon source 5 can rapidly stimulate the activity of beneficial bacteria while continuously providing carbon sources for the denitrification process, compensating for the lack of denitrification carbon sources in the water and significantly enhancing the TN removal rate. In specific implementation, the slow-release carbon source 5 is a chemically modified MDI high-efficiency slow-release carbon source.

[0018] Example 2 like Figure 1 As shown, this embodiment is a further improvement on embodiment 1, as detailed below: The volume ratio of medium-coarse sand, volcanic rock blocks 3, and slow-release carbon source 5 used in sand layer 2 is 75%-77%: 20%: 3-5%.

[0019] The volume ratio of medium-coarse sand, volcanic rock blocks 3, and slow-release carbon source 5 used in sand layer 2 is 77%:20%:3%.

[0020] The total height of the sand layer 2 after the introduction of volcanic rock blocks 3 and slow-release carbon source 5 is 0.5m.

[0021] Example 3 like Figure 1 As shown, this embodiment is a further improvement on embodiment 2, as detailed below: Inoculum 4 is uniformly introduced into sand layer 2. The beneficial bacteria in inoculum 4 play a dominant role in improving the microbial community system in the bed, improving the ecological chain of microorganisms, thereby effectively removing pollutants such as NH3, P, H2S, organic acids, and pesticides from the water, inhibiting the reproduction of harmful algae in the water, regulating the balance of algal, bacterial, and planktonic phases in the water, and improving the purification efficiency of wastewater.

[0022] The input amount of strain 4 is 2 kg / m³ 3 .

[0023] Strain 4 is one or more of the following genera: Nitrifying Bacteria, Nitrifying Spirulina, Nitrifying Bacillus, Nitrifying Leaf Bacteria, Nitrifying Spirulina, Denitrifying Bacteria, Bacillus, Pseudomonas, and Photosynthetic Bacteria. Among them, Nitrifying Bacteria, Nitrifying Spirulina, and Nitrifying Bacillus can enhance the nitrification of the substrate, significantly improving the removal of NH3 (ammonia) and nitrite from water; Nitrifying Leaf Bacteria and Nitrifying Spirulina can enhance the nitrosation of the substrate, significantly improving the removal of NH3 (ammonia) from water; Denitrifying Bacteria can enhance the denitrification of the substrate, significantly improving the removal of nitrate nitrogen from water; Bacillus can secrete proteases to accelerate the decomposition of large molecular organic matter in water, improving COD removal rate; Pseudomonas can detoxify and transform heavy metals; and Photosynthetic Bacteria can effectively enhance the substrate's ability to degrade hydrogen sulfide, ammonia, and other malodorous substances. In practice, the dominant bacterial groups among beneficial bacteria are: nitrifying bacteria, denitrifying bacteria, and Bacillus.

[0024] Example 4 like Figure 1 As shown, this embodiment is a further improvement on any one of embodiments 1 to 3, as detailed below: The effective viable count of strain 4 is ≥20 billion / g.

[0025] The bacterial strain 4 contains active ingredients, including vitamins, trace elements, activating enzymes, and photosynthetic catalysts.

[0026] Aquatic plants 1 are planted on sand layer 2. In practice, aquatic plants 1 are mainly planted in combination with deep-rooted and dense-rooted plants, such as calamus, cattail, eelgrass, hydrangea, snapdragon, and purslane. This helps maintain the stability of the positions of volcanic rock blocks 3 and fungal species 4 in sand layer 2 and promotes rhizosphere bacterial metabolism. Detailed Implementation

[0028] In response to the pollution of the riverbed substrate in a certain river, the polluted riverbed substrate was removed and backfilled with the original substrate remediation substrate to a depth of 0.5m. The substrate remediation substrate consisted of a uniform mixture of volcanic rock blocks, medium (coarse) sand, MDI-modified high-efficiency slow-release carbon source, and microbial inoculum. The volcanic rock had a particle size of 1-5mm, the medium (coarse) sand had a particle size of 2.0-5.0mm, and the volume percentages of volcanic rock, medium (coarse) sand, and MDI-modified high-efficiency slow-release carbon source were 20%, 77%, and 3%, respectively. The microbial inoculum density was 2kg / m³. 3 .

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A biological treatment device for water body substrate remediation matrix, characterized in that, The sand layer (2) is laid on the compacted original soil layer (6). The sand layer (2) is made of medium-coarse sand with a particle size of 2mm-5mm. Volcanic rock blocks (3) with a particle size of 1mm-5mm are uniformly added to the sand layer (2). Slow-release carbon source (5) is uniformly added to the sand layer (2).

2. The biological treatment device for water body substrate remediation matrix according to claim 1, characterized in that, The total height of the sand layer (2) after the volcanic rock block (3) and the slow-release carbon source (5) are put into it is 0.5m.

3. The biological treatment device for water body substrate remediation matrix according to claim 1, characterized in that, The inoculum (4) is evenly introduced into the sand layer (2).

4. The biological treatment device for water body substrate remediation matrix according to claim 3, characterized in that, The amount of the bacterial strain (4) added was 2 kg / m³. 3 .

5. A biological treatment device for water body substrate remediation matrix according to claim 3 or 4, characterized in that, The effective viable count of the strain (4) is ≥20 billion / g.

6. The biological treatment device for water body substrate remediation matrix according to claim 1, characterized in that, Aquatic plants (1) are planted on the sand layer (2).

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