Nitrifying bacteria selective biological rope and sewage ammonia nitrogen treatment method

Abstract

The present disclosure provides a nitrifying bacteria selective biological rope and a sewage ammonia nitrogen treatment method. The above-mentioned nitrifying bacteria selective biological rope includes a core and a plurality of nitrifying bacteria attachment rope loops arranged on the surface of the core. Each of the nitrifying bacteria attachment rope loops is woven by a plurality of ammonia nitrogen adsorption filaments, so that each nitrifying bacteria attachment rope loop forms an ammonia nitrogen adsorption field. The sewage ammonia nitrogen treatment method when the above-mentioned nitrifying bacteria selective biological rope is applied to slightly polluted water bodies includes the following steps: Obtain the nitrifying bacteria selective biological rope. Place the nitrifying bacteria selective biological rope in the sewage. Perform ammonia nitrogen enrichment treatment on the sewage through the nitrifying bacteria selective biological rope, so as to form an ammonia nitrogen enrichment area in the sewage. Adsorb the free nitrifying bacteria in the sewage through the nitrifying bacteria selective biological rope, so that the nitrifying bacteria adhere to the nitrifying bacteria attachment rope loops. Perform nitrification reaction on the ammonia nitrogen in the ammonia nitrogen enrichment area through the nitrifying bacteria.

Description

Technical Field

[0001] The present disclosure relates to the field of sewage treatment, and particularly to a nitrifying bacteria selective biological rope and a sewage ammonia nitrogen treatment method. Background Art

[0002] With the rapid development of current industrial enterprises, the water environment quality has been deteriorating. To meet the surface water environment quality standards in China, efficient water treatment technologies must be proposed to alleviate the water environment quality problems. In the field of sewage treatment, a biofilm carrier (biological rope) can provide a loading site for microorganisms in sewage, and then the microorganisms can reduce various indicators in the sewage to improve the water environment quality.

[0003] However, although the biological rope is a mature process in conventional domestic sewage treatment plants, its sewage treatment effect is poor when applied to slightly polluted water bodies such as rivers, lakes, and aquaculture water. Specifically, the ammonia nitrogen concentration in such slightly polluted water bodies is relatively low (generally 0mg / L - 20mg / L), and the traditional biological rope only has a loading function and cannot concentrate the ammonia nitrogen free in the water on the biological rope, resulting in limited nitrifying bacteria film formation on the biological rope. That is, the nitrifying bacteria cannot obtain sufficient nutrients, resulting in a small amount of nitrifying bacteria attached to the biological rope, and thus poor ammonia nitrogen treatment effect of the biological rope in slightly polluted water bodies. Summary of the Invention

[0004] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a nitrifying bacteria selective biological rope and a sewage ammonia nitrogen treatment method that can improve the ammonia nitrogen treatment effect.

[0005] The purpose of the present disclosure is achieved through the following technical solutions:

[0006] A nitrifying bacteria selective biological rope includes a core and a plurality of nitrifying bacteria attachment rope loops arranged on the surface of the core;

[0007] Wherein, each of the nitrifying bacteria attachment rope loops is woven by a plurality of ammonia nitrogen adsorption filaments, so that each nitrifying bacteria attachment rope loop forms an ammonia nitrogen adsorption field.

[0008] In one embodiment, the core is woven by a plurality of polyester setting wires.

[0009] In one embodiment, the core and the plurality of nitrifying bacteria attachment rope loops are wound into one body through a coating process.

[0010] In one embodiment, the ammonia nitrogen adsorption filaments include woven filaments and ammonia nitrogen adsorption powders adhered to the woven filaments through an adhesive.

[0011] In one embodiment, the ammonia nitrogen adsorption powder includes zeolite powder, tourmaline powder, medical stone, and Co-containing compound.

[0012] In one embodiment, the mass of the ammonia nitrogen adsorption powder accounts for 3% - 5% of the total mass of the nitrifying bacteria selective bio-rope.

[0013] In one embodiment, the mass ratio of the zeolite powder, the tourmaline powder, the medical stone, and the Co-containing compound is (5 - 10) : (1 - 2) : (1 - 2) : (0.5 - 1).

[0014] In one embodiment, the Co-containing compound is one or a combination of two of cobalt sulfate and cobalt carbonate.

[0015] In one embodiment, the binder is one or a combination of chitosan binder, gelatin, polylactic acid binder, polyurethane binder, and acrylate binder.

[0016] A method for treating ammonia nitrogen in sewage uses the nitrifying bacteria selective bio-rope described in any of the above embodiments to treat ammonia nitrogen in sewage;

[0017] The method for treating ammonia nitrogen in sewage includes the following steps:

[0018] Obtain the nitrifying bacteria selective bio-rope;

[0019] Place the nitrifying bacteria selective bio-rope in the sewage;

[0020] Perform ammonia nitrogen enrichment treatment on the sewage through the nitrifying bacteria selective bio-rope to form an ammonia nitrogen enrichment area in the sewage;

[0021] Perform adsorption treatment on the free nitrifying bacteria in the sewage through the nitrifying bacteria selective bio-rope, so that the nitrifying bacteria adhere to the nitrifying bacteria attachment rope loop;

[0022] Perform nitrification reaction on the ammonia nitrogen in the ammonia nitrogen enrichment area through the nitrifying bacteria.

[0023] Compared with the prior art, the present disclosure has at least the following advantages:

[0024] When the nitrifying bacteria selective biological rope is applied to slightly polluted water bodies, the inner core can well fix the nitrifying bacteria attachment rope loop, ensuring the stability of the nitrifying bacteria attachment rope loop in sewage. The nitrifying bacteria attachment rope loop woven by several ammonia nitrogen adsorption filaments forms an ammonia nitrogen adsorption field, which can adsorb the free ammonia nitrogen in the sewage and enrich it near the nitrifying bacteria attachment rope loop, making the area where the nitrifying bacteria selective biological rope is located rich in ammonia nitrogen. In this way, it can attract the free nitrifying bacteria in the sewage and make the nitrifying bacteria attach to the nitrifying bacteria attachment rope loop. Then, the nitrifying bacteria absorb the ammonia nitrogen and continuously reproduce to generate more nitrifying bacteria, effectively increasing the concentration of nitrifying bacteria in the sewage while effectively removing the ammonia nitrogen in the sewage, greatly improving the ammonia nitrogen treatment effect of the nitrifying bacteria selective biological rope in slightly polluted water bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present disclosure, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of the nitrifying bacteria selective biological rope;

[0027] Figure 2 It is a flowchart of the sewage ammonia nitrogen treatment method when the nitrifying bacteria selective biological rope is applied to slightly polluted water bodies;

[0028] Figure 3 It is a physical comparison diagram of the nitrifying bacteria selective biological rope of the present disclosure and the braided belt biological rope of the prior art. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To facilitate the understanding of the present disclosure, the present disclosure will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure content of the present disclosure more thoroughly understood.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this disclosure pertains. The terms used herein in the specification of this disclosure are for the purpose of describing particular embodiments only and are not intended to limit this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] The present disclosure provides a nitrifying bacteria selective bio-rope, including a core and a plurality of nitrifying bacteria attachment rope loops provided on the surface of the core. Each of the nitrifying bacteria attachment rope loops is woven from a plurality of ammonia nitrogen adsorption filaments, so that each nitrifying bacteria attachment rope loop forms an ammonia nitrogen adsorption field. The method for treating ammonia nitrogen in sewage when the above-mentioned nitrifying bacteria selective bio-rope is applied to slightly polluted water bodies includes the following steps: obtaining the nitrifying bacteria selective bio-rope. Placing the nitrifying bacteria selective bio-rope in the sewage. Performing ammonia nitrogen enrichment treatment on the sewage through the nitrifying bacteria selective bio-rope, so as to form an ammonia nitrogen enrichment area in the sewage. Performing adsorption treatment on free nitrifying bacteria in the sewage through the nitrifying bacteria selective bio-rope, so that the nitrifying bacteria attach to the nitrifying bacteria attachment rope loops. Performing nitrification reaction on the ammonia nitrogen in the ammonia nitrogen enrichment area through the nitrifying bacteria.

[0033] Please refer to Figure 1 , for a better understanding of the nitrifying bacteria selective bio-rope 10 of the present disclosure, the following further explanatory description is made on the nitrifying bacteria selective bio-rope 10:

[0034] A nitrifying bacteria selective bio-rope 10 of an embodiment includes a core 100 and a plurality of nitrifying bacteria attachment rope loops 200 provided on the surface of the core 100. Among them, each of the nitrifying bacteria attachment rope loops 200 is woven from a plurality of ammonia nitrogen adsorption filaments, so that each nitrifying bacteria attachment rope loop 200 forms an ammonia nitrogen adsorption field.

[0035] In this embodiment, when the nitrifying bacteria selective bio-rope 10 is applied to slightly polluted water bodies, the core 100 can well fix the nitrifying bacteria attachment rope loops 200, ensuring the stability of the nitrifying bacteria attachment rope loops 200 in sewage. And the nitrifying bacteria attachment rope loops 200 woven from a plurality of ammonia nitrogen adsorption filaments form an ammonia nitrogen adsorption field, which can adsorb free ammonia nitrogen in the sewage and enrich it near the nitrifying bacteria attachment rope loops 200, making the area where the nitrifying bacteria selective bio-rope 10 is located rich in ammonia nitrogen. In this way, it can attract free nitrifying bacteria in the sewage and make the nitrifying bacteria attach to the nitrifying bacteria attachment rope loops 200. Then, the nitrifying bacteria absorb the ammonia nitrogen and continuously reproduce to generate more nitrifying bacteria, effectively increasing the concentration of nitrifying bacteria in the sewage while effectively removing ammonia nitrogen in the sewage, greatly improving the ammonia nitrogen treatment effect of the nitrifying bacteria selective bio-rope 10 in slightly polluted water bodies.

[0036] In one embodiment, the inner core 100 is woven by a number of polyester shaping wires. It can be understood that polyester has good structural strength and is not easily deformed. The inner core woven by a number of polyester shaping wires has good structural strength and can still maintain good structural stability when bearing the impact of water flow in sewage, thus effectively improving the structural strength of the nitrifying bacteria selective bio-rope 10.

[0037] In one embodiment, the inner core 100 and a number of the nitrifying bacteria attachment rope loops 200 are wound into one body by a coating process. It can be understood that through the coating process, the inner core 100 and a number of nitrifying bacteria attachment rope loops 200 can be fused into one body, so that the strength tension of the nitrifying bacteria selective bio-rope 10 reaches more than 588 N, can bear the water flow impact force of different water bodies and the weight of the attached sludge, and is not easy to break, improving the structural strength of the nitrifying bacteria selective bio-rope 10.

[0038] It should be noted that a number of ammonia nitrogen adsorption wire filaments are woven into a nitrifying bacteria attachment rope. The two ends of the nitrifying bacteria attachment rope are coated inside the inner core 100 to form the nitrifying bacteria attachment rope loops 200. The arrangement of a number of nitrifying bacteria attachment rope loops 200 on the inner core 100 does not interfere with each other, increasing the attachment area of the nitrifying bacteria selective bio-rope 10. In this way, the attachment amount of nitrifying bacteria can be further increased, effectively improving the concentration of nitrifying bacteria in the sewage when the nitrifying bacteria selective bio-rope 10 is applied to slightly polluted water bodies, thereby improving the ammonia nitrogen treatment effect of the nitrifying bacteria selective bio-rope 10 in slightly polluted water bodies.

[0039] In one embodiment, the ammonia nitrogen adsorption wire filaments include woven wire filaments and ammonia nitrogen adsorption powders adhered to the woven wire filaments by an adhesive. It can be understood that before the woven wire filaments are woven and wound, the woven wire filaments are immersed in a suspension containing an adhesive and ammonia nitrogen adsorption powders, stirred fully and dried and cured, so that the woven wire filaments become ammonia nitrogen adsorption wire filaments with ammonia nitrogen adsorption function. By twisting a number of ammonia nitrogen adsorption wire filaments to form a nitrifying bacteria attachment rope, and then weaving and winding the nitrifying bacteria attachment rope and the inner core 100, a number of nitrifying bacteria attachment rope loops 200 are formed on the surface of the inner core 100. This also makes the ammonia nitrogen adsorption powders contained both inside and outside the structure of the nitrifying bacteria attachment rope loops 200. In this way, the adsorption force of the ammonia nitrogen adsorption field of the nitrifying bacteria attachment rope loops 200 can be further improved, so that the free ammonia nitrogen in the sewage can be enriched in the area where the nitrifying bacteria selective bio-rope 10 is located. In this way, the free nitrifying bacteria in the sewage can be attracted to adsorb on the nitrifying bacteria attachment rope loops 200, and then the nitrifying bacteria adsorb the ammonia nitrogen and grow and reproduce continuously. While removing the ammonia nitrogen, the nitrifying bacteria become the dominant bacteria in the sewage, greatly improving the ammonia nitrogen treatment effect of the nitrifying bacteria selective bio-rope 10 in slightly polluted water bodies.

[0040] In one embodiment, the braided wire filaments are one or a combination of more than one of polyester fiber filaments, nylon fiber filaments, polypropylene fiber filaments, carbon fiber filaments, and aramid fiber filaments. It can be understood that these fiber filaments all have relatively high structural strength, good wear resistance, and good tensile resistance. In this way, the structural strength of the nitrifying bacteria attachment rope loop 200 can be enhanced, and the strength tension of the nitrifying bacteria attachment rope loop 200 can reach more than 588 N, capable of withstanding the water flow impact force of different water bodies and the weight of the attached sludge, and not easily breaking, further enhancing the structural strength of the nitrifying bacteria selective biological rope 10.

[0041] In one embodiment, the ammonia nitrogen adsorption powder includes zeolite powder, tourmaline powder, medical stone, and Co-containing compounds. It can be understood that by mixing an adhesive, zeolite powder, tourmaline powder, medical stone, and Co-containing compounds, a suspension containing the adhesive and ammonia nitrogen adsorption powder is formed. Then, the braided wire filaments are immersed in the suspension containing the adhesive and ammonia nitrogen adsorption powder, fully stirred, and dried and cured to form ammonia nitrogen adsorption wire filaments. Then, several ammonia nitrogen adsorption wire filaments are twisted to form nitrifying bacteria attachment thin ropes, and then the nitrifying bacteria attachment ropes and the inner core 100 are woven and wound to form several nitrifying bacteria attachment rope loops 200 on the inner core 100.

[0042] Furthermore, through ion exchange, zeolite powder can effectively remove ammonium ions in water. The adsorption effect of zeolite powder on non-ionic ammonia is particularly significant. Since ammonia is a polar molecule and the surface of zeolite is negatively charged, zeolite powder has a strong adsorption capacity for ammonia nitrogen, forming an ammonia nitrogen adsorption field even on the nitrifying bacteria attachment rope loop 200, attracting the free ammonia nitrogen in the sewage to the vicinity of the ammonia nitrogen adsorption field, forming a local high-concentration ammonia nitrogen enrichment area in the area where the nitrifying bacteria selective biological rope 10 is located. Then, zeolite powder releases the adsorbed ammonium nitrogen through chemical equilibrium, and nitrifying bacteria can absorb and continuously reproduce the ammonium nitrogen. In this way, the ammonia nitrogen treatment effect of the nitrifying bacteria selective biological rope 10 can be effectively improved. In addition, zeolite powder can also quickly adsorb the polluting organic substances in the sewage, forming a local high-concentration COD enrichment area in the area where the nitrifying bacteria selective biological rope 10 is located, and the organic substances can provide nutrients and energy for the growth and reproduction of nitrifying bacteria. In this way, the COD value in the sewage can be reduced, thus effectively improving the sewage treatment effect of the nitrifying bacteria selective biological rope 10.

[0043] Furthermore, tourmaline powder can remove chlorine in sewage, reduce the acidity of sewage, and keep the pH value of sewage between 7.0 and 7.5. The slightly alkaline environment is conducive to the adsorption and desorption operations of nitrifying bacteria on the nitrifying bacteria attachment rope loop 200, making it easier for nitrifying bacteria to attach to the nitrifying bacteria attachment rope loop 200. At the same time, tourmaline powder has a permanent spontaneous electrode, which can generate an electrostatic field. The electrostatic field can adsorb heavy metal ions in water, making the heavy metal ions attach to the activated sludge, and then being discharged by the activated sludge on the nitrifying bacteria attachment rope loop 200, which can improve the sewage treatment effect of the nitrifying bacteria selective bio-rope 10. In addition, tourmaline powder can also adsorb organic matter and bacteria, which can further improve the adsorption effect of the nitrifying bacteria attachment rope loop 200 on organic matter and the sewage treatment effect of the nitrifying bacteria selective bio-rope 10.

[0044] Furthermore, medical stone has a strong adsorption capacity, enabling heavy metal ions and organic matter in sewage to form an adsorption layer on the surface of medical stone. That is to say, the addition of medical stone can adsorb heavy metal ions and organic matter on the surface of the nitrifying bacteria attachment rope loop 200, effectively improving the adsorption effect of the nitrifying bacteria attachment rope loop 200 on heavy metal ions and organic matter. The organic matter can provide nutrients and energy for the growth and reproduction of nitrifying bacteria. Then, discharging the activated sludge on the surface of the nitrifying bacteria attachment rope loop 200 can effectively reduce the content of heavy metal ions and the COD value in sewage, greatly improving the sewage treatment effect of the nitrifying bacteria selective bio-rope 10.

[0045] Furthermore, the Co-containing compound has a good catalytic effect, which can accelerate the decomposition of organic matter to generate energy, providing nutrients and energy for the growth and reproduction of nitrifying bacteria. The heavy metal ions in sewage attach to the activated sludge formed after the degradation of the organic matter and are discharged together with the activated sludge. In this way, the COD value and the heavy metal concentration in sewage can be effectively reduced, greatly improving the sewage treatment effect of the nitrifying bacteria selective bio-rope 10.

[0046] Thus, by combining zeolite powder, tourmaline powder, medical stone and the Co-containing compound on the nitrifying bacteria attachment rope loop 200 at the same time, the organic matter adsorption capacity and heavy metal adsorption capacity of the nitrifying bacteria attachment rope loop 200 can be enhanced. At the same time, it can catalyze the degradation of organic matter, providing nutrients and energy for the growth and reproduction of nitrifying bacteria. That is to say, through the synergistic effect of the four, a suitable growth environment for nitrifying bacteria is created, namely a local high-concentration ammonia nitrogen enrichment area and a local high-concentration COD enrichment area, so as to efficiently reduce the ammonia nitrogen value and COD value in the slightly polluted water body, greatly improving the sewage treatment effect of the nitrifying bacteria selective rope.

[0047] In one embodiment, the mass of the ammonia nitrogen adsorption powder accounts for 3% - 5% of the total mass of the nitrifying bacteria selective bio-rope 10. It can be understood that the ammonia nitrogen adsorption powder accounting for 3% - 5% of the total mass of the nitrifying bacteria selective bio-rope 10 enables the ammonia nitrogen adsorption powder to cover each braided wire filament, ensuring that each nitrifying bacteria attachment rope loop 200 can form an ammonia nitrogen adsorption field to attract the free ammonia nitrogen in the sewage to the nitrifying bacteria attachment rope loop 200, thereby attracting the free nitrifying bacteria in the sewage. At the same time, each nitrifying bacteria attachment rope loop 200 can also adsorb the organic matter in the sewage and catalyze the decomposition of the organic matter to generate energy, providing nutrients and energy for the growth and reproduction of the nitrifying bacteria, effectively increasing the concentration of the nitrifying bacteria in the local high-concentration ammonia nitrogen enrichment area, making the nitrifying bacteria the dominant bacteria in the sewage, and greatly reducing the ammonia nitrogen value and COD value in the sewage. In addition, the free heavy metal ions in the sewage will also be adsorbed on the nitrifying bacteria attachment rope loop 200 and attached to the activated sludge formed after the degradation of the organic matter. By discharging the activated sludge, the COD value and the concentration of heavy metal ions in the sewage can be effectively reduced, and the sewage treatment effect of the nitrifying bacteria selective bio-rope 10 can be greatly improved.

[0048] In one embodiment, the mass ratio of the zeolite powder, the tourmaline powder, the medical stone and the Co-containing compound is (5 - 10):(1 - 2):(1 - 2):(0.5 - 1). It can be understood that at this mass ratio, it is ensured that the nitrifying bacteria attachment rope loop 200 can form an ammonia nitrogen adsorption field in the sewage, and at the same time, it can also adsorb the organic matter and heavy metal ions in the sewage, forming a local high-concentration ammonia nitrogen enrichment area and a COD enrichment area in the area where the nitrifying bacteria selective bio-rope 10 is located. The organic matter is catalytically degraded to generate energy, providing nutrients and energy for the growth and reproduction of the nitrifying bacteria, making the nitrifying bacteria the dominant bacteria in the sewage, greatly improving the ammonia nitrogen treatment effect of the nitrifying bacteria selective bio-rope 10, and at the same time, it can also reduce the COD value and the concentration of heavy metal ions in the sewage.

[0049] In one embodiment, the Co-containing compound is a combination of one or both of cobalt sulfate and cobalt carbonate. It can be understood that both cobalt sulfate and cobalt carbonate contain divalent cobalt ions, and divalent cobalt ions have good catalytic activity, which can catalyze the degradation of organic matter in the sewage and provide energy for the growth and reproduction of the nitrifying bacteria, thereby increasing the concentration of the nitrifying bacteria in the sewage and effectively improving the ammonia nitrogen treatment effect of the nitrifying bacteria selective bio-rope 10 in the slightly polluted water body.

[0050] In one embodiment, the adhesive is one or a combination of chitosan adhesives, gelatin, polylactic acid adhesives, polyurethane adhesives, and acrylate adhesives. It can be understood that through these adhesives, the ammonia nitrogen adsorption powder can be evenly adhered to the braided wire filaments, with strong adhesiveness and water resistance, so that the ammonia nitrogen adsorption powder layer can still remain stable in water and will not detach from the braided wire filaments, ensuring the stable formation of the ammonia nitrogen adsorption field, thereby ensuring that the nitrifying bacteria selective bio-rope 10 has a good film-forming effect and enabling the nitrifying bacteria selective bio-rope 10 to have a good ammonia nitrogen treatment effect when applied to slightly polluted water bodies.

[0051] The present disclosure also provides a method for treating sewage ammonia nitrogen, which uses the nitrifying bacteria selective bio-rope described in any of the above embodiments to treat sewage ammonia nitrogen; the nitrifying bacteria selective bio-rope includes a core and a plurality of nitrifying bacteria attachment rope loops provided on the surface of the core. Among them, the nitrifying bacteria attachment rope loops are composed of ammonia nitrogen adsorption materials.

[0052] Please refer to Figure 2 , the sewage ammonia nitrogen treatment method of one embodiment includes the following steps:

[0053] S100, obtain a nitrifying bacteria selective bio-rope.

[0054] In this embodiment, the core and a plurality of nitrifying bacteria attachment rope loops are wound into one body through a braiding and coating process, ensuring that the nitrifying bacteria selective bio-rope has good structural stability to adapt to the water flow impact force of different water bodies, thereby improving the adaptability of the nitrifying bacteria selective bio-rope.

[0055] Furthermore, the nitrifying bacteria selective bio-rope includes a core and a plurality of nitrifying bacteria attachment rope loops arranged on the surface of the core. The core is a twist-type core formed by twisting multiple polyester shaping threads together in a strand. The nitrifying bacteria attachment rope loops are inserted into the core one by one during the process of twisting the multiple polyester shaping threads together, that is, inserting the nitrifying bacteria attachment rope loops one by one while twisting, so as to form the nitrifying bacteria selective bio-rope. It should be noted that there will be winding gaps during the process of twisting the multiple polyester shaping threads together. After inserting the nitrifying bacteria attachment rope loops into the winding gaps and then tightening, the nitrifying bacteria attachment rope loops are fixed on the core. According to the same steps, a plurality of nitrifying bacteria attachment rope loops are inserted into the core in sequence. By inserting the nitrifying bacteria attachment rope loops one by one while twisting, the connection stability between the nitrifying bacteria attachment rope loops and the core is effectively improved, which can effectively improve the structural strength of the nitrifying bacteria selective bio-rope. At the same time, the arrangements of the plurality of nitrifying bacteria attachment rope loops on the core do not interfere with each other, so that the nitrifying bacteria selective bio-rope has the advantage of a high attachment area when applied to slightly polluted water bodies, thereby effectively improving the adsorption effect of the nitrifying bacteria selective bio-rope on nitrifying bacteria, effectively improving the film-forming effect of the nitrifying bacteria selective bio-rope, and further effectively improving the ammonia nitrogen treatment effect of the nitrifying bacteria selective bio-rope.

[0056] It should also be noted that the shaping at both ends of the core is achieved by knotting the ends of the multiple polyester shaping threads, ensuring that the twist-type core has better structural compactness and guaranteeing that the inner core has a high structural strength.

[0057] Furthermore, the nitrifying bacteria attachment rope loop is formed by twisting a line loop in the middle to form two figure-eight loops, and the connection part of the two figure-eight loops is inserted into the core. It should be noted that by twisting the line loop in the middle to form two figure-eight loops, and then inserting the connection part of the two figure-eight loops into the winding gap and tightening during the winding process of the core, the two figure-eight loops are fixed on the core. Since the two figure-eight loops are twisted from the same line loop, that is to say, the two figure-eight loops have high connection stability, which further improves the strength tension of the nitrifying bacteria selective bio-rope, can withstand the water flow impact force of different water bodies and the weight of the attached sludge, and is not easy to break, thus improving the structural strength of the nitrifying bacteria selective bio-rope.

[0058] Further, two bowline knots are preferably tied in the middle of the two bowline loops first, and a knot interval is formed between the two knots, and the knot interval is clamped in the core wire. It should be noted that the nitrifying bacteria attachment rope loop is formed by tying two knots at the middle of both ends of the rope line, so as to form two bowline loops. There is a distance between the two knots, which is the knot interval. Insert the knot interval into the winding gap of multiple polyester shaping wires and then tighten the multiple polyester shaping wires to fix the two bowline loops on the core wire. Further, due to the existence of the knot interval, the inclination angle between the two bowline loops is greater than 0 degrees and less than 180 degrees. That is to say, by adjusting the length of the knot interval, the inclination angle between the two bowline loops can be adjusted, so that several bowline loops can be arranged in a spiral shape on the core wire, forming a three-dimensional attachment structure for the nitrifying bacteria selective bio-rope. That is, while increasing the attachment area of the nitrifying bacteria selective bio-rope, it ensures that the nitrifying bacteria selective bio-rope has a high structural strength, thereby effectively improving the adsorption effect of the nitrifying bacteria selective bio-rope on nitrifying bacteria, further improving the film-forming effect of the nitrifying bacteria selective bio-rope, and then effectively improving the ammonia nitrogen treatment effect of the nitrifying bacteria selective bio-rope.

[0059] S200, place the nitrifying bacteria selective bio-rope in the sewage.

[0060] In this embodiment, by hanging the nitrifying bacteria selective bio-rope on the fixing rack in the sewage, it is ensured that the nitrifying bacteria selective bio-rope will not be washed away by the water flow.

[0061] S300, perform ammonia nitrogen enrichment treatment on the sewage through the nitrifying bacteria selective bio-rope to form an ammonia nitrogen enrichment area in the sewage.

[0062] In this embodiment, the ammonia nitrogen concentration in the slightly polluted water body is between 0mg / L and 50mg / L, seemingly a high concentration. However, the area of the water body is large, and the ammonia nitrogen concentration dispersed in each area is different. The placement area of the bio-rope is limited. Therefore, several nitrifying bacteria attachment rope loops on the nitrifying bacteria selective bio-rope form an ammonia nitrogen adsorption field, which can adsorb and collect the free ammonia nitrogen in each area of the sewage and form a locally high-concentration ammonia nitrogen enrichment area. At the same time, the nitrifying bacteria attachment rope loop can also adsorb the organic matter in the sewage and catalytically degrade the organic matter, providing sufficient nutrients and energy for the growth and reproduction of nitrifying bacteria, thereby effectively reducing the ammonia nitrogen concentration in the sewage.

[0063] S400, perform adsorption treatment on the free nitrifying bacteria in the sewage through the nitrifying bacteria selective bio-rope, so that the nitrifying bacteria attach to the nitrifying bacteria attachment rope loop.

[0064] In this embodiment, free nitrifying bacteria in the nitrifying bacteria sewage will selectively come to the ammonia nitrogen enrichment area and adsorb on the nitrifying bacteria attachment rope loop, making the nitrifying bacteria become the dominant flora in the ammonia nitrogen enrichment area. The ammonia nitrogen enrichment area provides sufficient nutrients and energy for the growth of nitrifying bacteria, thereby promoting the growth and reproduction of nitrifying bacteria, increasing the concentration of nitrifying bacteria in the sewage, and thus greatly reducing the ammonia nitrogen concentration in the sewage.

[0065] It should be noted that the nitrifying bacteria selective biological rope is not only attached with nitrifying bacteria, but also other flora. It just promotes the growth and reproduction of nitrifying bacteria in the ammonia nitrogen enrichment area and increases the concentration of nitrifying bacteria in the sewage.

[0066] S500, carry out nitrification reaction on the ammonia nitrogen in the ammonia nitrogen enrichment area by the nitrifying bacteria.

[0067] In this embodiment, the nitrifying bacteria attached to the nitrifying bacteria attachment rope loop carry out nitrification reaction with ammonia nitrogen in the ammonia nitrogen enrichment area, converting ammonia nitrogen into nitrate, thereby effectively reducing the ammonia nitrogen concentration in the sewage.

[0068] In one embodiment, after the operation step of placing the nitrifying bacteria selective biological rope in the sewage and before the operation step of carrying out ammonia nitrogen enrichment treatment on the sewage by the nitrifying bacteria selective biological rope, the sewage ammonia nitrogen treatment method further includes the following steps:

[0069] Aerate the sewage through an aeration system.

[0070] It should be noted that by aerating the sewage through an aeration system, the dissolved oxygen in the sewage is controlled above 3mg / L, so as to ensure that nitrifying bacteria can grow and reproduce in the sewage. Further, by controlling the dissolved oxygen in the sewage above 5mg / L, more oxygen can be provided for nitrifying bacteria. Combined with the adsorption effect of the nitrifying bacteria attachment rope loop, it greatly promotes the growth and reproduction of nitrifying bacteria, forms a local high-concentration nitrifying bacteria enrichment area, further improves the ammonia nitrogen treatment effect of the nitrifying bacteria selective biological rope when applied to slightly polluted water bodies, and at the same time can also reduce the COD value and heavy metal ion concentration in the slightly polluted water bodies.

[0071] The following are examples, but it should be noted that the following examples do not exhaust all possible situations, and the materials used in the following examples can be obtained from commercial channels without special instructions.

[0072] Example 1

[0073] Process 1: Biological rope film formation

[0074] Fabricate a glass reactor with a length of 550 mm, a height of 600 mm, and a width of 200 mm (an aeration system is provided at the bottom, and a baffle and a sedimentation tank system are provided at the water outlet end). Add municipal sewage into the reactor, fix biological fillers in the reactor, with two rows, 5 pieces in each row, a total of 10 pieces, and add sludge from a municipal sewage treatment plant. The sludge dosage is 3000 mg / L, and aerobic biofilm formation is carried out for 15 days in the form of continuous water inlet until the biofilm formation is completed. Among them, a total of four groups of tests are set up. The reaction group: add the nitrifying bacteria-selective bio-rope of the present invention; control group 1, add braided belt bio-rope; control group 2, add brush bio-rope; control group 3, do not add bio-rope, but add 3000 mg / L of activated sludge.

[0075] Test procedure 2:

[0076] After the biofilm formation is completed, empty the sludge and sewage in the reactor, and restart continuous inflow of water from a polluted river in Guangdong. Measure the COD and ammonia nitrogen indexes of the influent and effluent of the reactor. The four groups of tests are carried out simultaneously to obtain the result table 1.

[0077] Table 1

[0078]

[0079] Example 2

[0080] Test procedure 1: Bio-rope biofilm formation

[0081] Fabricate a glass reactor with a length of 550 mm, a height of 600 mm, and a width of 200 mm (an aeration system is provided at the bottom, and a baffle and a sedimentation tank system are provided at the water outlet end). Add municipal sewage into the reactor, fix biological fillers in the reactor, with two rows, 5 pieces in each row, a total of 10 pieces, and add sludge from a municipal sewage treatment plant. The sludge dosage is 3000 mg / L, and aerobic biofilm formation is carried out for 15 days in the form of continuous water inlet until the biofilm formation is completed. Among them, a total of four groups of tests are set up. The reaction group: add the nitrifying bacteria-selective bio-rope of the present disclosure; control group 1, add braided belt bio-rope; control group 2, add brush bio-rope; control group 3, do not add bio-rope, but add 3000 mg / L of activated sludge.

[0082] Test procedure 2:

[0083] After the biofilm formation is completed, empty the sludge and sewage in the reactor, and restart continuous inflow of water from an ordinary fish pond in Guangdong. Measure the COD and ammonia nitrogen indexes of the influent and effluent of the reactor. The four groups of tests are carried out simultaneously to obtain the result table 2.

[0084] Table 2

[0085]

[0086] Example 3

[0087] Test Procedure 1: Bio-rope Film Formation

[0088] A glass reactor with a length of 550 mm, a height of 600 mm, and a width of 200 mm is fabricated (an aeration system is installed at the bottom, and a baffle and sedimentation tank system are provided at the water outlet end). Municipal sewage is added to the reactor, and biological fillers are fixed in the reactor, arranged in two rows, with 5 pieces in each row, a total of 10 pieces. Municipal sewage treatment plant sludge is added, and the sludge dosage is 3000 mg / L. Aerobic film formation is carried out for 15 days in the form of continuous water inlet, and the film formation is completed. Among them, a total of four groups of tests are set up. The reaction group: add the nitrifying bacteria-selective bio-rope disclosed in the present disclosure; Control Group 1, add braided belt bio-rope; Control Group 2, add brush bio-rope; Control Group 3, do not add bio-rope, but add 3000 mg / L of activated sludge.

[0089] Test Procedure 2:

[0090] After the film formation is completed, the sludge and sewage in the reactor are emptied, and the water from a certain bullfrog breeding pond in Guangdong is continuously fed again. The COD and ammonia nitrogen indexes of the influent and effluent of the reactor are measured. The four groups of tests are carried out simultaneously, and Table 3 of the results is obtained.

[0091] Table 3

[0092]

[0093]

[0094] Implementation Case 4

[0095] Test Procedure 1: Bio-rope Film Formation

[0096] A glass reactor with a length of 550 mm, a height of 600 mm, and a width of 200 mm is fabricated (an aeration system is installed at the bottom, and a baffle and sedimentation tank system are provided at the water outlet end). Municipal sewage is added to the reactor, and biological fillers are fixed in the reactor, arranged in two rows, with 5 pieces in each row, a total of 10 pieces. Municipal sewage treatment plant sludge is added, and the sludge dosage is 3000 mg / L. Aerobic film formation is carried out for 15 days in the form of continuous water inlet, and the film formation is completed. Among them, a total of four groups of tests are set up. The reaction group: add the nitrifying bacteria-selective bio-rope disclosed in the present disclosure; Control Group 1, add braided belt bio-rope; Control Group 2, add brush bio-rope; Control Group 3, do not add bio-rope, but add 3000 mg / L of activated sludge.

[0097] Test Procedure 2:

[0098] After the film formation is completed, the sludge and sewage in the reactor are emptied, and the water from a reservoir in Guangdong is continuously fed again. The COD and ammonia nitrogen indexes of the influent and effluent of the reactor are measured. The four groups of tests are carried out simultaneously, and Table 4 of the results is obtained.

[0099] Table 4

[0100]

[0101] Implementation Case 5

[0102] Test Procedure 1: Biological rope film formation

[0103] Fabricate a glass reactor with a length of 550 mm, a height of 600 mm, and a width of 200 mm (an aeration system is provided at the bottom, and a baffle and sedimentation tank system are provided at the water outlet end). Add municipal sewage to the reactor, fix the biological packing in the reactor, arranged in two rows, 5 pieces in each row, a total of 10 pieces, and add the sludge from a municipal sewage treatment plant with a sludge dosage of 3000 mg / L, and conduct aerobic film formation for 15 days in the form of continuous water inlet until the film formation is completed. Among them, a total of four groups of tests are set up. In the reaction group: add the nitrifying bacteria-selective biological rope of the present disclosure; in Control Group 1, add a braided belt biological rope; in Control Group 2, add a brush biological rope; in Control Group 3, do not add a biological rope and add 3000 mg / L of activated sludge.

[0104] Test Procedure 2:

[0105] After the film formation is completed, empty the sludge and sewage in the reactor, and start to continuously feed the water from a certain lake in Guangdong again, and measure the COD and ammonia nitrogen indexes of the influent and effluent of the reactor. The four groups of tests are carried out simultaneously, and Table 5 is obtained.

[0106] Table 5

[0107]

[0108] As can be seen from Tables 1 to 5, the use of the nitrifying bacteria-selective biological rope of the present disclosure has a higher treatment efficiency for ammonia nitrogen and COD than the braided belt biological rope and the brush biological rope, and also has a higher treatment efficiency than the conventional activated sludge treatment method. It can be reflected that the nitrifying bacteria-selective biological rope of the present disclosure has a better ammonia nitrogen removal limit than the braided belt biological rope, the brush biological rope, and the activated sludge method, and can reduce the effluent ammonia nitrogen to a lower level.

[0109] As can be seen from Table 5, even when the influent ammonia nitrogen is lower than 1 mg / L, the ammonia nitrogen removal rate can still reach 77.92% by using the nitrifying bacteria-selective biological rope of the present disclosure, which is much higher than the braided belt biological rope, the brush biological rope, and the activated sludge treatment method. This also shows that the nitrifying bacteria-selective biological rope of the present disclosure has obvious advantages in the ammonia nitrogen treatment efficiency for different slightly polluted water bodies.

[0110] Combined with Tables 1 - 5 and Figure 3 it can be seen that Figure 3On the left side is the nitrifying bacteria selective biological rope of the present disclosure. The arrangement of the nitrifying bacteria attachment rope loops on the inner core of the nitrifying bacteria selective biological rope of the present disclosure does not interfere with each other. At the same time, the nitrifying bacteria attachment rope loops are woven with ammonia nitrogen adsorption filaments, so that each nitrifying bacteria attachment rope loop can form an ammonia nitrogen adsorption field in the sewage. That is to say, while increasing the attachment space of the nitrifying bacteria selective biological rope, a locally high-concentration ammonia nitrogen enrichment area is formed, significantly improving the concentration of nitrifying bacteria in the sewage. Figure 3 On the right side is a conventional braided belt biological rope. The braided belt ropes of the braided belt biological rope are arranged densely on the rope core, resulting in interference with each other, reducing the attachment space of nitrifying bacteria. At the same time, it does not have the function of ammonia nitrogen adsorption, which also leads to significantly weaker ammonia nitrogen treatment effect in slightly polluted water bodies than the nitrifying bacteria selective biological rope of the present disclosure.

[0111] Compared with the prior art, the present disclosure has at least the following advantages:

[0112] When the nitrifying bacteria selective biological rope is applied to slightly polluted water bodies, the inner core can well fix the nitrifying bacteria attachment rope loops, ensuring the stability of the nitrifying bacteria attachment rope loops in the sewage. The nitrifying bacteria attachment rope loops woven by several ammonia nitrogen adsorption filaments form an ammonia nitrogen adsorption field. The ammonia nitrogen adsorption field can adsorb the free ammonia nitrogen in the sewage and enrich it near the nitrifying bacteria attachment rope loops, making the area where the nitrifying bacteria selective biological rope is located rich in ammonia nitrogen. In this way, it can attract the free nitrifying bacteria in the sewage and make the nitrifying bacteria attach to the nitrifying bacteria attachment rope loops. Then, the nitrifying bacteria absorb the ammonia nitrogen and continuously reproduce to generate more nitrifying bacteria, effectively increasing the concentration of nitrifying bacteria in the sewage while effectively removing the ammonia nitrogen in the sewage, greatly improving the ammonia nitrogen treatment effect of the nitrifying bacteria selective biological rope in slightly polluted water bodies.

[0113] The above embodiments only represent several implementation manners of the present disclosure. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the disclosed patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present disclosure, several modifications and improvements can be made, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent shall be subject to the appended claims.

Claims

1. A nitrifying bacteria selective biological rope, characterized in that: It comprises an inner core and a plurality of nitrifying bacteria attachment rope rings arranged on the surface of the inner core; The nitrifying bacteria attachment rope ring is woven from a plurality of ammonia nitrogen adsorption threads, so that each of the nitrifying bacteria attachment rope rings forms an ammonia nitrogen adsorption field; The inner core is a twisted wire core formed by twisting a plurality of polyester shaping wires together; The ammonia nitrogen adsorption wire comprises a braided wire and ammonia nitrogen adsorption powder adhered to the braided wire by an adhesive; The braided wires are a combination of one or more of polyester fiber wires, nylon fiber wires, polypropylene fiber wires, carbon fiber wires and aramid fiber wires; The specific steps of obtaining the nitrifying bacteria selective biological rope are: The nitrifying bacteria attachment rope rings are inserted into the thread core one by one during the process of twisting the multiple polyester shaped threads together, that is, the nitrifying bacteria attachment rope rings are inserted one by one during the twisting process, thereby forming the nitrifying bacteria selective biological rope; Wherein, the nitrifying bacteria attachment rope ring is a wire ring twisted in the middle to form two figure-eight rings, and the connection between the two figure-eight rings is inserted into the wire core; Two nodules are first formed between the two figure-eight rings, a nodule spacer is formed between the two nodules, and the nodule spacer is clamped in the wire core; The inclination angle between the two figure-eight rings is greater than 0 degrees and less than 180 degrees, so that the plurality of figure-eight rings are arranged in a spiral shape on the wire core; The ammonia nitrogen adsorption powder includes zeolite powder, tourmaline powder, medical stone and Co-containing compound; The mass ratio of the zeolite powder, the tourmaline powder, the medical stone and the Co-containing compound is (5-10): (1-2): (1-2): (0.5-1); The mass of the ammonia nitrogen adsorption powder accounts for 3% to 5% of the total mass of the nitrifying bacteria selective biological rope; The Co-containing compound is one or a combination of cobalt sulfate and cobalt carbonate; The adhesive is one or more combinations of chitosan adhesive, gelatin, polylactic acid adhesive, polyurethane adhesive and acrylate adhesive.

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