Efficient enrichment type anaerobic ammonium oxidation bacteria biofilm culturing filler

Abstract

The utility model discloses efficient enrichment type anaerobic ammonium oxidation bacteria biofilm culturing packing which comprises a plurality of packing strings which are sequentially arranged in the same direction, each packing string comprises a plurality of packing blocks, every two adjacent packing blocks are connected through reinforcing wires to form the packing string, and the packing strings are all connected with a tank body to form a fixed bed type. Each filler block is formed by cutting off a triangular pyramid structure at each vertex of a cube structure, and the bottom surface of each triangular pyramid is a regular triangle. According to the efficient enrichment type anaerobic ammonium oxidation bacteria biofilm culturing filler provided by the utility model, the filler blocks are connected in series to form a fixed bed type through the reinforcing wires, so that the overall toughness of the filler string is improved, the enrichment stability of anaerobic ammonium oxidation bacteria in the filler is improved, and meanwhile, edges and corners of the filler blocks are removed on the basis of cubes; therefore, the filler block can better tolerate water flow scouring, the thalli and the filler block are further not prone to falling off, and the period of replacing the filler is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen waste treatment, and in particular relates to a high-efficiency enrichment type anaerobic ammonia oxidizing bacteria biofilm filler. Background Art

[0002] Food waste biogas (also called food waste leachate) is the filtrate produced by anaerobic fermentation of food waste. It is a biological organic fertilizer with both rapid and long-term effects. It contains rich nutrients necessary for agricultural production and can be used in the cultivation of crops, fruit trees, vegetables, flowers, cash crops and other plants. Traditional wastewater biological denitrification technology requires the provision of dissolved oxygen for nitrification and an additional carbon source for denitrification, which increases the operating cost of wastewater treatment. The anaerobic ammonia oxidation (ANAMMOX) process is anoxic and autotrophic reaction, which can save aeration energy and carbon source, and has a small amount of residual sludge. It is very suitable for treating wastewater with high total nitrogen concentration and low C / N, such as food waste biogas.

[0003] However, anaerobic ammonium oxidizing bacteria grow slowly, have a long generation cycle, and are very easy to be lost. These characteristics lead to a long startup cycle and unstable operation of the anaerobic ammonium oxidizing reactor. Currently, the industry often uses anaerobic ammonium oxidizing reactors with fluidized bed polyethylene fillers, that is, adding fluidized bed polyethylene fillers into the reactor to facilitate the attachment of anaerobic ammonium oxidizing bacteria to the reactor, increase the sludge retention time, and reduce the loss of anaerobic ammonium oxidizing bacteria, but the effect is still not ideal. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a high-efficiency enriched anaerobic ammonia-oxidizing bacteria biofilm filler, in which the filler blocks are connected in series into a fixed bed type by reinforcing wires, thereby improving the overall toughness of the filler string and improving the stability of the enrichment of anaerobic ammonia-oxidizing bacteria in the filler.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A high-efficiency enrichment type anaerobic ammonia-oxidizing bacteria biofilm filler comprises a plurality of filler strings arranged in sequence along the same direction, each of the filler strings comprises a plurality of filler blocks, two adjacent filler blocks are connected to form the filler string by reinforcing wires, and the plurality of filler strings are connected to a tank body to form a fixed bed.

[0007] In one embodiment, the distances between two adjacent filler blocks are the same.

[0008] In one embodiment, the reinforcing wires are all located on the same straight line, and both ends thereof are connected to the midpoint of the filler block.

[0009] In one embodiment, the edge spacing between two adjacent filler blocks is 2 cm.

[0010] In one embodiment, the filler block is a polyester sponge filler block made of modified polyester sponge.

[0011] In one embodiment, the reinforcing wire is made of modified nylon wire.

[0012] In one embodiment, the filler block is formed by cutting off a triangular pyramid structure at each vertex of a cubic structure.

[0013] In one embodiment, the base of the triangular pyramid is an equilateral triangle.

[0014] In one embodiment, the ratio of the side length of the equilateral triangle to the side length of the cube structure is 1:10.

[0015] In one embodiment, the side length of the cube structure is 2 cm, and the side length of the equilateral triangle is 0.2 cm.

[0016] The beneficial effects of the utility model are:

[0017] (1) Compared with the traditional fluidized bed polyethylene filler, the anaerobic ammonia oxidizing bacteria biofilm filler provided by the utility model adopts a modified polyester sponge material with a strong hydrophilic ability for food waste biogas slurry, and compared with the polyethylene filler, the polyester sponge filler block has a larger specific surface area, which can make the effective contact area between the anaerobic ammonia oxidizing bacteria and the filler larger, which is more conducive to the enrichment of the anaerobic ammonia oxidizing bacteria in the filler; compared with the polyethylene filler, the polyester sponge filler block has a finer porosity, which can better shield and protect the attached anaerobic ammonia oxidizing bacteria from the scouring of water shear force, which can make the biofilm formation speed faster, which is more conducive to the enrichment of anaerobic ammonia oxidizing bacteria and the improvement of the abundance in the bacterial community reactor;

[0018] (2) The packing blocks are connected in series to form a fixed bed by reinforcing wires, which can improve the overall toughness of the packing string and improve the stability of the operation of the anaerobic ammonium oxidation reactor;

[0019] (3) Compared with conventional cubic filler blocks, the filler blocks of the present invention have their edges and corners removed on the basis of the cube, making the filler blocks more resistant to water erosion, which further makes the bacteria and the filler blocks less likely to fall off, thereby extending the cycle of replacing the filler. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0021] in:

[0022] Figure 1 A schematic structural diagram of an embodiment of the utility model is shown;

[0023] Figure 2 The schematic diagram of the structure of the packing block of the utility model is shown;

[0024] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0025] Reference numerals:

[0026] 1-filling block, 2-reinforcement wire, 3-buffer part. DETAILED DESCRIPTION

[0027] The utility model will be further described below in conjunction with the accompanying drawings.

[0028] The utility model provides a high-efficiency enrichment type anaerobic ammonia oxidizing bacteria biofilm filler, such as Figure 1 and Figure 2 As shown, it includes a plurality of packing strings arranged in sequence along the same direction, each packing string includes a plurality of packing blocks 1, and two adjacent packing blocks 1 are connected to form a packing string by reinforcing wires 2, and the plurality of packing strings are connected to the tank body to form a fixed bed type, and the reinforcing wires 2 are all located on the same straight line, and both ends thereof are connected to the midpoint of the packing block 1, and the packing block 1 is formed by cutting off a triangular pyramid structure at each vertex of a cubic structure, and the bottom surface of the triangular pyramid is an equilateral triangle;

[0029] It should be noted that the packing blocks 1 are connected in series into a fixed bed type by reinforcing wires 2, which can improve the overall toughness of the packing string and improve the stability of the operation of the anaerobic ammonium oxidation reactor. Compared with the conventional cubic packing blocks 1, the packing blocks 1 of this embodiment remove the edges and corners on the basis of the cube to form a buffer portion 3, so that the packing blocks 1 can better withstand water flow erosion, that is, the bacteria and the packing blocks 1 are further not easy to fall off, and the cycle of replacing the packing is extended. That is, the anaerobic ammonium oxidizing bacteria biofilm packing provided in this embodiment is conducive to the enrichment of anaerobic ammonium oxidizing bacteria in the packing. Through the structural design of the packing blocks 1 and the layout of the packing blocks 1, the anaerobic ammonium oxidizing bacteria can grow efficiently in the reactor, ensuring the stable operation of the anaerobic ammonium oxidation reactor;

[0030] Specifically, the distance between two adjacent filler blocks 1 is 2 cm, and the ratio of the side length of the regular triangle to the side length of the cube structure is 1:10. In this embodiment, the side length of the cube structure is 2 cm, and the side length of the regular triangle is 0.2 cm.

[0031] In one embodiment, the filler block 1 is a polyester sponge filler block 1 made of modified polyester sponge, and the reinforcing wire 2 is made of modified nylon wire. Compared with the traditional fluidized bed polyethylene filler, it has a stronger hydrophilic ability for food waste sludge. At the same time, the polyester sponge filler block 1 has a larger specific surface area, which can make the effective contact area between the anaerobic ammonia oxidizing bacteria and the filler larger, which is more conducive to the enrichment of anaerobic ammonia oxidizing bacteria in the filler. The polyester sponge filler block 1 has a finer porosity, which can better shield and protect the attached anaerobic ammonia oxidizing bacteria from being eroded by water shear force, and can make the biofilm formation speed faster, which is more conducive to the enrichment of anaerobic ammonia oxidizing bacteria and increasing the abundance of the bacterial community in the reactor, that is, the stability of the operation of the anaerobic ammonia oxidizing reactor is improved.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0033] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features described in the various dependent claims and herein may be combined in a manner different from that described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other described embodiments.

Claims

1. A highly efficient enrichment type anaerobic ammonia oxidizing bacteria biofilm filler, characterized in that: It comprises a plurality of packing strings arranged in sequence along the same direction, each of the packing strings comprises a plurality of packing blocks, two adjacent packing blocks are connected to form the packing string by reinforcing wires, a plurality of packing strings are connected to the pool body to form a fixed bed, and the packing blocks are formed by cutting off a triangular pyramid structure at each vertex of a cubic structure.

2. A highly efficient enrichment type anaerobic ammonia oxidizing bacteria biofilm filler according to claim 1, characterized in that: The distances between two adjacent filling blocks are the same.

3. A highly efficient enrichment type anaerobic ammonia oxidizing bacteria biofilm filler according to claim 1 or 2, characterized in that: The reinforcing wires are all located on the same straight line, and both ends thereof are connected to the midpoint of the filler block.

4. A highly efficient enrichment type anaerobic ammonia oxidizing bacteria biofilm filler according to claim 2, characterized in that: The edge spacing between two adjacent filler blocks is 2 cm.

5. A highly efficient enrichment type anaerobic ammonia oxidizing bacteria biofilm filler according to claim 1, characterized in that: The filler block is a polyester sponge filler block made of modified polyester sponge.

6. A highly efficient enrichment type anaerobic ammonia oxidizing bacteria biofilm filler according to claim 1, characterized in that: The reinforcing wire is made of modified nylon wire.

7. A highly efficient enrichment type anaerobic ammonia oxidizing bacteria biofilm filler according to claim 1, characterized in that: The bottom surface of the triangular pyramid is an equilateral triangle.

8. A highly efficient enrichment type anaerobic ammonia oxidizing bacteria biofilm filler according to claim 7, characterized in that: The ratio of the side length of the equilateral triangle to the side length of the cube structure is 1:

10.

9. A highly efficient enrichment type anaerobic ammonia oxidizing bacteria biofilm filler according to claim 8, characterized in that: The side length of the cube structure is 2 cm, and the side length of the equilateral triangle is 0.2 cm.

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