A structure of ecological membrane

Abstract

The present invention discloses a structure of an ecological membrane, belonging to the technical field of sewage treatment materials. The structure of the ecological membrane includes ecological membrane pores located inside the ecological membrane and carbon fiber plush located outside the ecological membrane. The ecological membrane pores are formed inside the carbon fiber plush, and the ecological membrane pores account for more than 98%. The specific surface area of ​​the ecological membrane is 1300-2200m² / g, and the external specific surface area of ​​the ecological membrane is 0.2-2.0m² / g. The structure of the ecological membrane, through natural competition, the bacterial flora of the membrane has diversity and selective symbiosis, the flagella of the ecological membrane and the extremely large specific surface area of ​​more than 1500m² / g, so that the excellent adsorption and rich pore size of the ecological membrane can maximize the concentration of sewage carbon sources on the membrane for bacterial flora nutrients.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment materials, and in particular relates to a structure of an ecological membrane. Background Art

[0002] In sewage treatment, sewage treatment membranes are divided into two types: biofilm and filtration membrane. Biofilm allows organisms to grow on a carrier and use biological synthesis and metabolism to remove pollutants in the water, that is, using ecological technology to maximize the sewage treatment removal effect.

[0003] Ecological technology is to establish the synergistic effect of different fungi to maximize the sewage treatment removal effect; it is to establish a stable symbiotic relationship among fungi to create the diversity of the bacterial community; it is to fully degrade pollutants through the bacterial community to achieve the self-purification state of sewage and return to the ecological origin of sewage treatment.

[0004] In the prior art, the MBR membrane has too high energy consumption for mud-water separation, slow biocompatibility and slow biofilm growth, and a long process debugging cycle. To this end, we propose an ecological membrane structure to solve the above problems. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a structure of an ecological membrane to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an ecological membrane structure, which includes ecological membrane pores located inside the ecological membrane and carbon fiber plush located outside the ecological membrane, the ecological membrane pores are formed inside the carbon fiber plush, the ecological membrane pores account for more than 98%, the specific surface area of ​​the ecological membrane is 1300-2200m² / g, and the external specific surface area of ​​the ecological membrane is 0.2-2.0m² / g.

[0007] To further optimize the technical solution, the ecological membrane has a fibrous shape structure, and strip-shaped ecological membrane pores are arranged in parallel inside the fibrous carbon fiber plush.

[0008] To further optimize the technical solution, the unit diameter of the ecological membrane is 5-30 um, and the maximum size of the ecological membrane pores of an ecological membrane unit is 20 angstroms.

[0009] Further optimizing the technical solution, the minimum adsorption concentration ppm of the ecological membrane has a numerical range of 5-10.

[0010] The technical solution is further optimized, the water filtration flow rate of the ecological membrane is 6.0-7.0 L / min, and the TVOC adsorption ml / g of the ecological membrane is 2000.

[0011] To further optimize the technical solution, the carbon fiber plush includes the following components in parts by weight: 40-60 parts of diatomaceous earth, 6-8 parts of carbon nanotubes, 6-8 parts of chitosan, and 20-30 parts of dimethylformamide.

[0012] Compared with the prior art, the present invention provides a structure of an ecological membrane, which has the following beneficial effects:

[0013] 1. The structure of the ecological membrane is different from that of physical filtration membranes such as MBR in that the bacterial community grows in the ecological membrane. Through natural competition, the bacterial community on the membrane is diverse and selectively symbiotic, and has community stability. The flagella of the ecological membrane and the extremely large specific surface area of ​​more than 1500m² / g make the ecological membrane have excellent adsorption and rich pore size, which can maximize the concentration of sewage carbon sources on the membrane to provide nutrients for the bacterial community.

[0014] 2. The structure of the ecological membrane can not only be widely used in the treatment of black and odorous water bodies, ecological restoration of rivers and lakes, environmentally friendly mobile public toilets, upgrading of sewage treatment plants, small-scale decentralized sewage treatment in new rural construction, mine ecological management, farmland transformation, and ecological breeding, but also has high-value applications in air treatment, organic waste gas recovery, indoor air purification, household water purification, and landscape fish farming. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of an ecological membrane proposed by the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of an ecological membrane under a unit proposed by the present invention;

[0017] Figure 3 A schematic diagram showing the structure of an ecological membrane proposed by the present invention and the interception function of other materials;

[0018] Figure 4 A schematic diagram showing the structure of an ecological membrane proposed by the present invention and the adsorption function of other materials;

[0019] Figure 5 A schematic diagram showing the structure of an ecological membrane proposed by the present invention compared with that of granular activated carbon;

[0020] Figure 6 A schematic diagram showing the structure of an ecological membrane proposed by the present invention compared with other three activated carbons;

[0021] Figure 7 This is a schematic diagram of the product structure of an ecological membrane proposed by the present invention.

[0022] In the picture: 1. Pores of ecological membrane; 2. Carbon fiber plush. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0024] See also Figure 1 , an ecological membrane structure, the ecological membrane structure includes ecological membrane pores 1 located inside the ecological membrane and carbon fiber plush 2 located outside the ecological membrane, the ecological membrane pores 1 are formed inside the carbon fiber plush 2, the ecological membrane pores 1 account for more than 98%, the specific surface area of ​​the ecological membrane is 1300-2200m² / g, and the external specific surface area of ​​the ecological membrane is 0.2-2.0m² / g;

[0025] The carbon fiber plush 2 comprises the following components in parts by weight: 40-60 parts of diatomaceous earth, 6-8 parts of carbon nanotubes, 6-8 parts of chitosan, and 20-30 parts of dimethylformamide.

[0026] Specifically, the ecological membrane has a fibrous structure, and strip-shaped ecological membrane pores 1 are arranged in parallel inside the fibrous carbon fiber plush 2 .

[0027] like Figure 2 As shown, specifically, the unit diameter of the ecological membrane structure is 5-30 um, and the maximum size of the ecological membrane pore 1 of an ecological membrane structure unit is 20 angstroms.

[0028] Specifically, the minimum adsorption concentration ppm of the ecological membrane has a numerical range of 5-10.

[0029] Specifically, the water filtration flow rate of the ecological membrane is 6.0-7.0 L / min, and the TVOC adsorption ml / g of the ecological membrane is 2000.

[0030] A method for preparing an ecological membrane structure, comprising the following specific steps:

[0031] S1, dissolving chitosan in an acetic acid solvent to form a film to obtain a chitosan film to be loaded;

[0032] S2, placing the carbon nanotubes in a dimethylformamide solvent, then adding the prepared chitosan membrane to be loaded, and performing ultrasonic treatment for 1-2 hours to obtain nanoscale carbon fibers loaded with the chitosan membrane;

[0033] S3. Evenly mix the carbon fiber loaded with chitosan membrane and diatomaceous earth. Under the protection of inert gas, keep the mixture at 300-400°C for 1 hour, then heat it to 900-1000°C for 2 hours, wash and dry it after cooling, and obtain an ecological membrane with ecological membrane pores 1 and carbon fiber plush 2 on the outside.

[0034] Specifically, in S3, nitrogen gas is selected as the inert gas. Example

[0035] An ecological membrane structure, the ecological membrane structure includes ecological membrane pores 1 located inside the ecological membrane and carbon fiber plush 2 located outside the ecological membrane, the ecological membrane pores 1 are formed inside the carbon fiber plush 2, the ecological membrane pores 1 account for more than 98%, the specific surface area of ​​the ecological membrane is 1300-2200m² / g, and the external specific surface area of ​​the ecological membrane is 0.2-2.0m² / g;

[0036] The carbon fiber plush 2 includes the following components in parts by weight: 50 parts of diatomaceous earth, 7 parts of carbon nanotubes, 7 parts of chitosan, and 25 parts of dimethylformamide.

[0037] Specifically, the ecological membrane structure is fibrous in shape, and strip-shaped ecological membrane pores 1 are arranged in parallel inside the fibrous carbon fiber plush 2 .

[0038] like Figure 2 As shown, specifically, the unit diameter of the ecological membrane is 5-30 um, and the maximum size of the ecological membrane pore 1 of an ecological membrane unit is 20 angstroms.

[0039] Specifically, the minimum adsorption concentration ppm of the ecological membrane has a numerical range of 5-10.

[0040] Specifically, the water filtration flow rate of the ecological membrane is 6.0-7.0 L / min, and the TVOC adsorption ml / g of the ecological membrane is 2000.

[0041] A method for preparing an ecological membrane structure, comprising the following specific steps:

[0042] S1, dissolving chitosan in an acetic acid solvent to form a film to obtain a chitosan film to be loaded;

[0043] S2, placing the carbon nanotubes in a dimethylformamide solvent, then adding the prepared chitosan membrane to be loaded, and performing ultrasonic treatment for 1-2 hours to obtain nanoscale carbon fibers loaded with the chitosan membrane;

[0044] S3. Evenly mix the carbon fiber loaded with chitosan membrane and diatomaceous earth. Under the protection of inert gas, keep the mixture at 350°C for 1 hour, then heat it to 900-1000°C and keep it for 2 hours. After cooling, wash and dry it to obtain an ecological membrane with ecological membrane pores 1 and carbon fiber plush 2 on the outside.

[0045] Specifically, in S3, liquid argon is selected as the inert gas. Example

[0046] The structure of an ecological film described in Example 1 or Example 2 is used to obtain an ecological film product such as Figure 7 As shown in the figure, the external fur system is well developed, and the suitable pore structure covers a wide range. According to the technical test of Shenzhen Huali Environmental Technology Co., Ltd., the test shows that there are as many as 3,000 to 5,000 species of microorganisms on the surface of the ecological membrane; the algae on the ecological base are also the natural food of aquatic animals in the water. With the establishment of the ecosystem, multiple species appear, and the number of plankton animals that feed on bait increases, thus forming a complete food chain. The micro A / O environment on the surface of the ecological membrane base creates suitable conditions for the reproduction of nitrification and denitrification bacterial communities and the growth of algae, thereby enhancing the removal effect of nitrogen and phosphorus. Algae absorb nitrogen, phosphorus, sulfur and some trace elements in the water; algae have a 10-fold higher ability to fix and mineralize phosphorus than bacteria; algae provide a large amount of dissolved oxygen to the water body through photosynthesis, maximizing the use of ecological energy. Since the bacterial community grows in the membrane, through natural competition, the biofilm-forming bacteria have diversity and selective symbiosis, making the bacterial community life cycle a full metabolic cycle, with community stability, changing the textbook calculation model of the half-cycle; the excellent adsorption and rich pore size of the Huali ecological membrane can maximize the concentration of carbon sources on the membrane to provide nutrients for the bacterial community. The characteristics of its full metabolic cycle make the effluent sludge volume less than 60% year-on-year, and the mud and water separation is simple and fast, completely abandoning the mud and water separation mode of the MBR membrane, reducing energy consumption by half. Because of its biocompatible microorganisms, biofilms are fast, and aging biofilms are easy to fall off, the commissioning cycle is one-third of the traditional process.

[0047] The adsorption and interception capabilities of this ecological membrane are compared with those of carbon adsorption materials on the market. After technical testing by Shenzhen Huali Environmental Technology Co., Ltd., the test results are as follows Figure 3 and Figure 4 As shown, the ecological membrane also performs well in intercepting large particles of impurities such as rust, silt and suspended matter in water; at the same time, the ecological membrane's adsorption capacity for harmful substances such as residual chlorine, compounds, benzenetrichloromethane, trichloroethylene in water is far greater than other adsorption materials.

[0048] This ecological membrane was compared with various activated carbons on the market. After technical testing by Shenzhen Huali Environmental Technology Co., Ltd., the test results are as follows: Figure 5 and Figure 6It is shown that the specific surface area, external specific surface area, pore size, minimum adsorption concentration, unit diameter, filtered water flow, TVOC adsorption, adsorption speed and other comparison items are superior to various activated carbons on the market. The structure of the ecological membrane can not only be widely used in the treatment of black and odorous water bodies, ecological restoration of rivers and lakes, environmentally friendly mobile public toilets, upgrading and transformation of sewage treatment plants, small-scale decentralized sewage treatment in new agricultural construction, mine ecological management, farmland transformation, ecological breeding, but also has high-value applications in air treatment, organic waste gas recovery, indoor air purification, household water purification, landscape fish breeding, etc.

[0049] The beneficial effects of the present invention are:

[0050] 1. The ecological membrane structure prepared by the above method is different from physical filtration membranes such as MBR in that the bacterial community grows in the ecological membrane. Through natural competition, the bacterial community on the membrane is diverse and selectively symbiotic, and has community stability. The flagella of the ecological membrane and the extremely large specific surface area of ​​more than 1500m² / g make the ecological membrane have excellent adsorption and rich pore size, which can maximize the concentration of sewage carbon sources on the membrane to provide nutrients for the bacterial community.

[0051] 2. The structure of the ecological membrane can not only be widely used in the treatment of black and odorous water bodies, ecological restoration of rivers and lakes, environmentally friendly mobile public toilets, upgrading of sewage treatment plants, small-scale decentralized sewage treatment in new rural construction, mine ecological management, farmland transformation, and ecological breeding, but also has high-value applications in air treatment, organic waste gas recovery, indoor air purification, household water purification, and landscape fish farming.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ecological membrane structure, comprising ecological membrane pores (1) located inside the ecological membrane and carbon fiber plush (2) located outside the ecological membrane, characterized in that: The pores (1) of the ecological membrane are formed inside the carbon fiber plush (2), the pores (1) of the ecological membrane account for more than 98%, the specific surface area of ​​the ecological membrane is 1300-2200 m² / g, the external specific surface area of ​​the ecological membrane is 0.2-2.0 m² / g, the unit diameter of the ecological membrane is 5-30 um, and the maximum size of the pores (1) of one ecological membrane unit is 20 angstroms; The carbon fiber plush (2) comprises the following components in parts by weight: 40-60 parts of diatomaceous earth, 6-8 parts of carbon nanotubes, 6-8 parts of chitosan, and 20-30 parts of dimethylformamide; The preparation method of the ecological film comprises the following steps: S1, dissolving chitosan in an acetic acid solvent to form a film to obtain a chitosan film to be loaded; S2, placing the carbon nanotubes in a dimethylformamide solvent, then adding the prepared chitosan membrane to be loaded, and performing ultrasonic treatment for 1-2 hours to obtain nanoscale carbon fibers loaded with the chitosan membrane; S3. The carbon fiber loaded with chitosan membrane and diatomaceous earth are uniformly mixed. The obtained mixture is kept at 300-400°C for 1 hour under the protection of nitrogen gas, and then the temperature is increased to 900-1000°C and kept for 2 hours. After cooling, the mixture is washed and dried to obtain an ecological membrane with ecological membrane pores (1) and carbon fiber plush (2) on the outside.

2. The structure of an ecological membrane according to claim 1, characterized in that: The ecological membrane has a fibrous structure, and strip-shaped ecological membrane pores (1) are arranged in parallel inside the fibrous carbon fiber plush (2).

3. The structure of an ecological membrane according to claim 1, characterized in that: The numerical range of the minimum adsorption concentration ppm of the ecological membrane is 5-10.

4. The structure of an ecological membrane according to claim 1, characterized in that: The water filtration flow rate of the ecological membrane is 6.0-7.0 L / min, and the TVOC adsorption ml / g of the ecological membrane is 2000.

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