Rapid domestication starting system for anaerobic ammonium oxidation flora

Abstract

The utility model discloses an anaerobic ammonium oxidation flora rapid domestication starting system which comprises a plurality of filler strings arranged in a tank body, the plurality of filler strings are arranged in sequence, each filler string is formed by connecting a plurality of polyester sponge filler blocks, the polyester sponge filler blocks located at the two ends of the filler strings are fixedly connected with the tank body, and the filler strings are connected with the tank body. The bottom of the fixed bed type biological membrane tank is communicated with the inoculation mud liquid and the kitchen waste biogas slurry. The bottom up-flow feeding mode is adopted, dissolved oxygen in the air is prevented from being brought into the tank, a low-oxygen environment required by anaerobic ammonium oxidation bacteria enrichment culture can be maintained, meanwhile, the modified polyester sponge material is adopted, the effective contact area between the anaerobic ammonium oxidation bacteria and the filler can be larger, and the anaerobic ammonium oxidation bacteria enrichment culture device has the advantages of being simple in structure and convenient to use. According to the present invention, with the filler, the enrichment of the anaerobic ammonium oxidation bacteria in the filler is easily achieved, the filler further has the fine porosity, and can well shield and protect the attached anaerobic ammonium oxidation bacteria so as to prevent the anaerobic ammonium oxidation bacteria from being washed by the water shearing force, and the film forming speed can be fast;

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen waste treatment, and in particular relates to a rapid domestication and starting system for anaerobic ammonia oxidizing bacteria. Background Art

[0002] Food waste biogas (also called food waste leachate) is the filtrate produced by anaerobic fermentation of food waste. Food waste biogas has the characteristics of high total nitrogen concentration, high COD concentration and low C / N. The traditional nitrification-denitrification denitrification process has high operating costs. Compared with the traditional denitrification process, anaerobic ammonium oxidation has the advantages of no need to add carbon source, saving more than 60% of energy and low residual sludge production.

[0003] However, the growth rate of anaerobic ammonium oxidizing bacteria is slower than that of other heterotrophic bacteria, and their age cycle is long, which makes it difficult to enrich and cultivate them, becoming a limiting factor for their promotion and application. At the same time, anaerobic ammonium oxidizing bacteria have extremely stringent requirements on the growth environment. Factors such as dissolved oxygen, salinity, and substrate concentration C / N will affect their activity. At present, anaerobic ammonium oxidizing bacteria are often domesticated and enriched through anaerobic ammonium oxidation reactors, mainly using polyethylene filler fluidized bed biofilms, which have poor hydrophilicity and film-forming effects, affecting enrichment and biofilm formation. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a rapid acclimation and starting system for anaerobic ammonia oxidizing bacteria. The system adopts a fixed-bed biofilm pool and a bottom upflow feeding method to avoid bringing dissolved oxygen in the air into the pool, which is beneficial to maintaining the low-oxygen environment required for the enrichment and cultivation of anaerobic ammonia oxidizing bacteria. At the same time, the modified polyester sponge material is used to 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 system also 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.

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

[0006] A rapid acclimation and start-up system for anaerobic ammonia-oxidizing bacteria comprises a plurality of filler strings arranged in a pool body, wherein the plurality of filler strings are arranged in sequence, and each of the filler strings is formed by connecting a plurality of polyester sponge filler blocks, and the polyester sponge filler blocks located at both ends of the filler strings are fixedly connected to the pool body to form a fixed-bed biofilm pool, wherein the bottom of the fixed-bed biofilm pool is connected to inoculated sludge and food waste biogas slurry.

[0007] In one embodiment, two adjacent polyester sponge filling blocks and a polyester sponge filling block and the pool body are connected by modified nylon threads.

[0008] In one embodiment, the modified nylon filaments in each of the filler strings are located on the same straight line and are connected to the midpoint of the polyester sponge filler block.

[0009] In one embodiment, the spacing between two adjacent strings of the filler is 15 cm.

[0010] In one embodiment, the polyester sponge filling block is formed by cutting off a triangular pyramid structure at each vertex of a cubic structure.

[0011] In one embodiment, the base of the triangular pyramid is an equilateral triangle.

[0012] In one embodiment, the ratio of the side length of the equilateral triangle to the side length of the cube structure is 1:10.

[0013] 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.

[0014] In one embodiment, the distances between two adjacent polyester sponge filling blocks are the same.

[0015] In one embodiment, the distance between two adjacent polyester sponge filling blocks is 2 cm.

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

[0017] (1) The polyester sponge filler blocks are connected into strings through modified nylon threads and arranged in the pool, forming a fixed bed biofilm pool. Compared with the traditional fluidized bed polyethylene filler, the fixed bed modified polyester sponge filler string has a stronger hydrophilicity for food waste biogas slurry;

[0018] (2) The bottom upflow feeding method is adopted to prevent the inoculated slurry and food waste biogas from disturbing contact with the air surface above the tank body during the bottom upflow batching process, thereby avoiding the introduction of dissolved oxygen in the air into the tank, which is conducive to maintaining the low oxygen environment required for the enrichment culture of anaerobic ammonia-oxidizing bacteria;

[0019] (3) The filler block is made of modified polyester sponge material, that is, 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 to form a biofilm. It also has a finer porosity, which can better shield and protect the attached anaerobic ammonia oxidizing bacteria from the scouring of water shear force, and can make the biofilm formation speed faster;

[0020] (4) The filler block is improved to a cube-like filler block with a cut edge compared to the conventional cube structure, so that a single filler block can better withstand water erosion, that is, the bacteria and the filler block are not easy to fall off, thereby extending the cycle of replacing the filler.

[0021] (5) Through the structural design of the filler block, the improvement of the material of the filler block and the formation of a fixed-bed biofilm pool, the anaerobic ammonium oxidizing bacteria can be quickly domesticated, proliferated and enriched, and the biofilm formation speed is faster. The rapid biofilm formation of the anaerobic ammonium oxidizing bacteria can be achieved in less than a month. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0023] in:

[0024] Figure 1 A schematic structural diagram of an embodiment of the utility model is shown;

[0025] Figure 2 A schematic diagram showing the structure of the polyester sponge packing block of the utility model

[0026] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0027] Reference numerals:

[0028] 1-polyester sponge packing block, 2-modified nylon thread, 3-tank body, 4-buffer part. DETAILED DESCRIPTION

[0029] The utility model will be further described below in conjunction with the accompanying drawings.

[0030] The utility model provides a rapid acclimation and start-up system for anaerobic ammonia oxidizing bacteria. Figure 1 As shown, it includes a plurality of filler strings arranged in a tank body 3, the plurality of filler strings are arranged in sequence, each filler string is formed by connecting a plurality of polyester sponge filler blocks 1, and the polyester sponge filler blocks 1 located at both ends of the filler string are fixedly connected to the tank body 3 to form a fixed bed biofilm tank, and the bottom of the fixed bed biofilm tank is connected to the inoculated sludge and the food waste biogas slurry;

[0031] It should be noted that the bottom of the fixed-bed biofilm pool is connected to the inoculated slurry and the kitchen waste biogas, that is, the inoculated slurry and the kitchen waste biogas are fed from the bottom of the pool body 3 in an upflow manner and discharged from the top, that is, the inoculated slurry and the kitchen waste biogas are prevented from disturbing contact with the air surface on the upper part of the pool body 3, thereby preventing the dissolved oxygen in the air from being brought into the pool, so as to be more conducive to maintaining the low oxygen environment required for the enrichment and cultivation of anaerobic ammonia oxidizing bacteria. At the same time, a plurality of filler strings connected to the pool body 3 are arranged in the pool body 3, and a plurality of modified polyester sponge fillers are strung into a fixed bed type, which is more hydrophilic. 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 the anaerobic ammonia oxidizing bacteria in the filler to form a biofilm, and it also has a finer porosity, which can better shield and protect the attached anaerobic ammonia oxidizing bacteria from being eroded by water shear force, thereby increasing the biofilm formation speed;

[0032] Specifically, two adjacent polyester sponge filler blocks 1 and the polyester sponge filler block 1 and the tank body 3 are connected by modified nylon threads 2. The modified nylon threads 2 in each filler string are located on the same straight line and connected to the midpoint of the polyester sponge filler block 1, that is, the polyester sponge filler blocks 1 are strung together by the modified nylon threads 2 and connected to the tank body 3 to form a fixed bed biofilm tank. In the tank body 3, the spacing between two adjacent strings of fillers is set to 15 cm. Compared with traditional fluidized bed polyethylene fillers, the fixed bed modified polyester sponge filler string has a stronger hydrophilicity for food waste biogas slurry.

[0033] In one embodiment, Figure 2 As shown, the polyester sponge packing block 1 is formed by cutting off a triangular pyramid structure at each vertex of a cube structure, the bottom surface of the triangular pyramid is an equilateral triangle, and the ratio of the side length of the equilateral 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 equilateral triangle is 0.2 cm, that is, the edges and corners are removed on the basis of the cube structure to form a buffer portion 4, so that the packing block can better withstand water flow erosion, that is, the bacteria and the packing block are further not easy to fall off, and the cycle of replacing the packing is extended, that is, through the structural design of the packing block, the material improvement of the packing block and the fixed bed biofilm pool formed, the anaerobic ammonia oxidizing bacteria group is quickly domesticated, proliferated and enriched, and the biofilm formation speed is faster, and the rapid biofilm formation of the anaerobic ammonia oxidizing bacteria group can be achieved in less than one month;

[0034] In one embodiment, the distance between two adjacent polyester sponge filler blocks 1 is the same. Specifically, the distance between two adjacent polyester sponge filler blocks 1 is 2 cm, which is conducive to the formation and enrichment of anaerobic ammonium oxidizing bacteria.

[0035] 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.

[0036] 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 rapid acclimation and start-up system for anaerobic ammonium oxidizing bacteria, characterized in that: It includes a plurality of filler strings arranged in a pool body, wherein the plurality of filler strings are arranged in sequence, and each of the filler strings is formed by connecting a plurality of polyester sponge filler blocks. The polyester sponge filler blocks located at both ends of the filler strings are fixedly connected to the pool body to form a fixed bed biofilm pool, and the bottom of the fixed bed biofilm pool is connected to the inoculated sludge and the food waste biogas slurry.

2. The anaerobic ammonium oxidizing bacteria rapid acclimation and startup system according to claim 1, characterized in that: Two adjacent polyester sponge filling blocks and a polyester sponge filling block and the pool body are connected by modified nylon threads.

3. The anaerobic ammonium oxidizing bacteria rapid acclimation and startup system according to claim 2, characterized in that: The modified nylon filaments in each of the filler strings are all located on the same straight line and are connected to the midpoint of the polyester sponge filler block.

4. The anaerobic ammonium oxidizing bacteria rapid acclimation and startup system according to claim 1, characterized in that: The spacing between two adjacent strings of the filler is 15 cm.

5. The anaerobic ammonium oxidizing bacteria rapid acclimation and startup system according to claim 1, characterized in that: The polyester sponge filling block is formed by cutting off a triangular pyramid structure at each vertex of a cubic structure.

6. The anaerobic ammonium oxidizing bacteria rapid acclimation and startup system according to claim 5, characterized in that: The bottom surface of the triangular pyramid is an equilateral triangle.

7. The anaerobic ammonium oxidizing bacteria rapid acclimation and startup system according to claim 6, characterized in that: The ratio of the side length of the equilateral triangle to the side length of the cube structure is 1:

10.

8. The anaerobic ammonium oxidizing bacteria rapid acclimation and startup system according to claim 7, 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.

9. The anaerobic ammonium oxidizing bacteria rapid acclimation and startup system according to claim 1, characterized in that: The distances between two adjacent polyester sponge filling blocks are the same.

10. The anaerobic ammonium oxidizing bacteria rapid acclimation and start-up system according to claim 9, characterized in that: The distance between two adjacent polyester sponge filling blocks is 2 cm.

Images