Integrated multi-stage treatment system for knitting and dyeing wastewater

Abstract

This invention discloses an integrated multi-stage treatment system for knitting and dyeing wastewater, comprising interconnected anaerobic and aerobic tanks. The anaerobic tank is equipped with a stirring device, on which several anaerobic bioreactors are mounted. Each anaerobic bioreactor includes a support rod connected to the stirring device, with anaerobic packing balls rotatably connected to both the upper and lower sides of the support rod via rotating shafts. The aerobic tank contains several stepped platforms connected to adjacent platforms via filter screens. An aerobic bioreactor is connected to the bottom of the filter screen via a connecting bucket. Each aerobic bioreactor includes an outer casing with aerobic microorganisms attached to its exterior, and an inner casing containing aerobic biological packing material. An aeration device is located at the bottom of the aerobic tank. This invention features accelerated biofilm formation, increased biofilm quantity, and easily replaceable contact interfaces.

Description

Technical Field

[0001] This invention relates to a wastewater treatment system, and more particularly to an integrated multi-stage treatment system for knitting and dyeing wastewater. Background Technology

[0002] Common wastewater treatment methods include activated sludge, biofilm, anaerobic biological treatment, chemical precipitation, oxidation-reduction, ion exchange, and membrane separation. Among these, activated sludge and biofilm processes belong to biochemical conversion technologies; chemical precipitation and oxidation-reduction processes belong to chemical conversion technologies; and ion exchange and membrane separation belong to physicochemical separation technologies. The biofilm process, like the activated sludge process, is a solid-film method within the field of wastewater microbial treatment. It utilizes a biofilm to biodegrade or transform organic pollutants in wastewater and is now widely used in industrial and municipal wastewater treatment. Compared to the activated sludge process, the biofilm process has several unique advantages, such as: strong adaptability to variations in water quantity, quality, and temperature; good treatment effect and excellent nitrification function; small sludge volume and easy solid-liquid separation; high treatment efficiency and low power costs.

[0003] The core of the biofilm method is the biological packing material. When this material is added to wastewater, bacteria attach to and bind to its surface, forming a biofilm. This biofilm absorbs and decomposes pollutants in the wastewater and promotes the reproduction of new microorganisms. The biological packing material not only provides a fixed attachment site for microorganisms but also enhances their decomposition capabilities. The material and surface properties of the biological packing material directly affect microbial attachment and growth, thus influencing wastewater treatment efficiency. Currently, wastewater treatment processes suffer from slow biofilm formation rates, low biofilm quantity, and fixed contact positions with the wastewater, leading to low treatment efficiency and poor results. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated multi-stage treatment system for knitting and dyeing wastewater. This invention features accelerated biofilm formation, increased biofilm quantity, and easily replaceable contact interfaces.

[0005] The technical solution of this invention: an integrated multi-stage treatment system for knitting and dyeing wastewater, comprising interconnected anaerobic and aerobic tanks. The anaerobic tank is equipped with a stirring device, on which several anaerobic bioreactors are mounted. Each anaerobic bioreactor includes a support rod connected to the stirring device, with anaerobic packing balls rotatably connected to both the upper and lower sides of the support rod via a rotating shaft. The aerobic tank contains several stepped platforms, adjacent platforms connected by a filter grid. An aerobic bioreactor is connected below the filter grid via a connecting bucket. Each aerobic bioreactor includes an outer casing, the exterior of which is covered with aerobic microorganisms. An inner casing is located inside the outer casing, containing aerobic biological packing. An aeration device is located at the bottom of the aerobic tank.

[0006] In the aforementioned integrated multi-stage treatment system for knitting and dyeing wastewater, the center of the anaerobic packing ball is rotatably connected to a rotating shaft, and several swirling, inclined blades are distributed around the circumference of the rotating shaft, with flow gaps formed between adjacent blades.

[0007] In the aforementioned integrated multi-stage treatment system for knitting and dyeing wastewater, the blades include upper blades and lower blades, which are staggered and composed of several intersecting ribs, the surfaces of which have a pleated structure.

[0008] In the aforementioned integrated multi-stage treatment system for knitting and dyeing wastewater, the anaerobic packing balls are a mesh structure made of carbon fiber filaments; the blades are made of bamboo charcoal material.

[0009] In the aforementioned integrated multi-stage treatment system for knitting and dyeing wastewater, the outer casing and the end of the connecting bucket are slidably connected vertically, the outlet of the connecting bucket is fixedly connected to the inlet of the inner casing, and a tension spring is also fitted at the end of the connecting bucket. One end of the tension spring is connected to the outer casing, and the other end of the tension spring is connected to the inner casing. A filter membrane is provided on the side of the inner casing, cleaning bristles are provided on the inner side wall of the outer casing, and an outlet is provided at the bottom of the outer casing.

[0010] In the aforementioned integrated multi-stage treatment system for knitting and dyeing wastewater, the aerobic biological packing includes a pair of vertically distributed mounting plates. The mounting plates are connected to the inner box by a connecting spring. Several elastic fibers are connected between the two mounting plates, and each elastic fiber is symmetrically and crosswise wrapped with cellulose fibers and bamboo charcoal fibers.

[0011] In the aforementioned integrated multi-stage treatment system for knitting and dyeing wastewater, the aeration device includes an aeration pipe, an oxygenation pump at one end of the aeration pipe, several aeration heads on the aeration pipe, a protective cap at the top outlet of the aeration head, several spirally distributed air outlets on the side wall of the protective cap, and a blocking block inside the protective cap for blocking the air outlets. The blocking block is connected to the inner top of the protective cap by a compression spring.

[0012] In the aforementioned integrated multi-stage treatment system for knitting and dyeing wastewater, the stirring device includes a stirring motor. The shaft of the stirring motor is equipped with a drive rod that extends longitudinally into the anaerobic tank. The drive rod is connected to a support rod, and the drive rod is also equipped with a transverse stirring rod with shearing teeth.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] This invention's anaerobic tank uses a stirring device to mix wastewater and anaerobic packing balls, ensuring that organic matter in the wastewater is evenly distributed within the packing balls. This increases the contact rate with microorganisms in the packing balls, facilitating a more comprehensive degradation of organic matter in the wastewater. The stirring device also rotates the packing balls, changing the reaction interface for the microorganisms and improving treatment efficiency. After treatment by anaerobic microorganisms, the wastewater enters the aerobic tank. It first passes through a stepped platform, allowing for better dissolved oxygen during its descent. Combined with aeration by the aeration device, this increases the dissolved oxygen content in the water, providing a better living environment for aerobic microorganisms, increasing their reproduction rate, accelerating biofilm formation, and increasing biofilm quantity. Simultaneously, the wastewater passes through a filter screen during its descent. After filtration, it is guided through a connecting hopper into the inner tank, where it is treated by the aerobic biological packing. Finally, it flows out from the outlet of the outer tank into the aerobic tank for secondary treatment by aerobic microorganisms outside the outer tank. This invention combines anaerobic packing balls in an anaerobic tank with aerobic microorganisms in the inner and outer boxes of an aerobic tank to jointly degrade wastewater, thereby improving the speed and efficiency of wastewater degradation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of anaerobic packing material balls;

[0017] Figure 3 This is a schematic diagram of the upper and lower blades in an anaerobic packing ball;

[0018] Figure 4 This is a schematic diagram of the structure of an aerobic bioreactor;

[0019] Figure 5 This is a schematic diagram of the external structure of the aeration device;

[0020] Figure 6 This is a schematic diagram of the internal structure of the aeration head and protective cap.

[0021] The labels in the attached diagram are as follows: 1. Anaerobic tank; 2. Aerobic tank; 3. Stirring device; 31. Stirring motor; 32. Drive rod; 33. Stirring rod; 34. Shearing tooth; 4. Anaerobic bioreactor; 41. Support rod; 42. Anaerobic packing ball; 421. Rotating shaft; 422. Upper blade; 423. Lower blade; 424. Ribbon; 43. Platform; 44. Filter grid; 45. Connecting hopper; 46. Tension spring; 5. Aerobic bioreactor. 51. Reactor; 51. Outer casing; 511. Outlet; 52. Inner casing; 53. Aerobic biological packing; 531. Mounting plate; 532. Connecting spring; 533. Elastic fiber; 534. Cellulose fiber; 535. Bamboo charcoal fiber; 54. Cleaning brush bristles; 6. Aeration device; 61. Aeration pipe; 62. Aeration pump; 63. Aeration head; 64. Protective cap; 65. Air outlet; 66. Blocking block; 67. Compression spring. Detailed Implementation

[0022] The present invention will be further described below with reference to embodiments, but these embodiments are not intended to limit the scope of the invention.

[0023] Example:

[0024] like Figures 1-6 As shown, the integrated multi-stage treatment system for knitting and dyeing wastewater includes an anaerobic tank 1 and an aerobic tank 2 connected to each other. The anaerobic tank 1 is equipped with a stirring device 3, and several anaerobic bioreactors 4 are mounted on the stirring device 3. Each anaerobic bioreactor 4 includes a support rod 41 connected to the stirring device 3, and anaerobic packing balls 42 are rotatably connected to the upper and lower sides of the support rod 41 via a rotating shaft. The aerobic tank 2 is equipped with several stepped platforms 43, and adjacent platforms 43 are connected by a filter grid 44. An aerobic bioreactor 5 is connected to the bottom of the filter grid 44 via a connecting bucket 45. The aerobic bioreactor 5 includes an outer casing 51, with aerobic microorganisms attached to the outside of the outer casing 51. An inner casing 52 is located inside the outer casing 51, and aerobic biological packing 53 is located inside the inner casing 52. An aeration device 6 is located at the bottom of the aerobic tank 2.

[0025] Anaerobic tank 1 uses a stirring device 3 to mix wastewater and anaerobic packing balls 42, ensuring that organic matter in the wastewater is evenly distributed in the anaerobic packing balls 42, increasing the contact rate with microorganisms in the anaerobic packing balls 42, which helps to more comprehensively degrade organic matter in the wastewater, and drives the anaerobic packing balls 42 to rotate, changing the reaction interface of microorganisms and improving treatment efficiency. After being treated by anaerobic microorganisms, the wastewater enters aerobic tank 2. The wastewater first passes through a stepped platform 43. During the fall from the platform 43, the wastewater can better dissolve oxygen. Combined with the aeration treatment of the aeration device 6, the dissolved oxygen content in the water is increased, providing a better living environment for aerobic microorganisms, increasing the number of aerobic microorganisms, accelerating the biofilm formation speed, and increasing the biofilm formation. During the fall from the platform, the wastewater is simultaneously filtered by a filter screen 44. After filtration, it is guided through a connecting bucket 45 into the interior of the inner tank 52, treated by aerobic biological packing 53, and then flows out from the outlet 511 of the outer tank 51 into aerobic tank 2 to undergo secondary treatment with aerobic microorganisms outside the outer tank 51. In other words, the present invention combines the anaerobic packing balls 42 in the anaerobic tank 1 with the aerobic microorganisms in the inner box 52 and outer box 51 in the aerobic tank 2 to jointly degrade wastewater, thereby improving the degradation speed and efficiency of wastewater treatment.

[0026] The anaerobic packing ball 42 is rotatably connected to a rotating shaft 421 at its center. Several swirling, inclined blades are distributed circumferentially on the rotating shaft 421, with flow gaps formed between adjacent blades. The anaerobic packing ball 42 rotates under the influence of the stirring device 3. Simultaneously, wastewater flows into the interior of the anaerobic packing ball 42 and comes into contact with the swirling blades, causing the blades to rotate. This causes the blades to cut the water flow, creating more effective turbulence within the anaerobic packing ball 42, increasing the contact area between the wastewater and the biofilm, and improving the wastewater treatment effect. Furthermore, the rotation of the blades also alters the contact interface between the wastewater and the biofilm, maintaining effective contact between the membrane and the wastewater, ensuring high treatment efficiency.

[0027] The blades include an upper blade 422 and a lower blade 423, which are staggered. Both the upper blade 422 and the lower blade 423 are composed of several intersecting ribs 424, and the surface of the ribs 424 has a wrinkled structure. The blade structure design can accommodate more anaerobic microorganisms, has good biofilm attachment characteristics, increases the contact surface area between the biofilm and the wastewater, and greatly improves the treatment efficiency.

[0028] The anaerobic filler ball 42 is a mesh structure made of carbon fiber filaments, which has high strength; the blade is made of bamboo charcoal material, which has a large adsorption capacity for microbial clusters and can adsorb more microorganisms to form more microbial clusters.

[0029] The outer casing 51 and the connecting bucket 45 are slidably connected at the ends. The outlet of the connecting bucket 45 is fixedly connected to the inlet of the inner casing 52. A tension spring 46 is also sleeved on the end of the connecting bucket 45. One end of the tension spring 46 is connected to the outer casing 51, and the other end of the tension spring 46 is connected to the inner casing 52. A filter membrane is provided on the side of the inner casing 52. Cleaning bristles 54 are provided on the inner side wall of the outer casing 51. An outlet 511 is provided at the bottom of the outer casing 51.

[0030] Wastewater enters the inner tank 52, is first treated by the aerobic biological packing material 53, then filtered through the filter membrane, and finally flows out from the outlet 511 of the outer tank 51 into the aerobic tank 2 to undergo a secondary reaction with the aerobic microorganisms outside the outer tank 51. The gas generated by the aeration device 6 impacts the outer tank 51 upwards, causing it to move upwards and collide with the inner tank 52, resulting in vibrations in both tanks. This makes it easier for the aged biofilm to detach from the surfaces of the inner and outer tanks, keeping the membrane active. Furthermore, the movement of the outer tank 51 drives the cleaning brushes 54 to clean the filter membrane, while also agitating the water flow, increasing the dissolved oxygen content, improving the survival rate of aerobic microorganisms, and enhancing the degradation rate of organic matter.

[0031] The aerobic biological packing material 53 includes a pair of vertically distributed mounting plates 531. The mounting plates 531 are connected to the inner chamber 52 by a connecting spring 532. Several elastic fibers 533 are connected between the two mounting plates 531. Each elastic fiber 533 is symmetrically and crosswise wound with cellulose fibers 534 and bamboo charcoal fibers 535. The structure of the aerobic biological packing material 53 creates many interaction sites, improving the biofilm attachment rate and giving it a large surface area. When the outer chamber 51 collides with the inner chamber 52, or when wastewater impacts the inner chamber 52, it easily causes vibration and deformation of the elastic fibers 533, cellulose fibers 534, and bamboo charcoal fibers 535, thereby improving oxygen transfer within the aerobic biological packing material 53, providing more oxygen for the attached microorganisms, and increasing the degradation efficiency of aerobic microorganisms. The vibration and deformation of the elastic fibers 533, cellulose fibers 534, and bamboo charcoal fibers 535 also cuts the water flow, reducing air bubbles in the water flow and improving treatment efficiency.

[0032] The aeration device 6 includes an aeration pipe 61, with an oxygenation pump 62 at one end. Several aeration heads 63 are mounted on the aeration pipe 61, and a protective cap 64 is provided at the top outlet of each aeration head 63. Several spirally distributed air outlets 65 are provided on the side wall of the protective cap 64. A blocking block 66 for blocking the air outlets 65 is provided inside the protective cap 64, and the blocking block 66 is connected to the inner top of the protective cap 64 by a compression spring 67. The aeration head 63 sprays an oxygen flow from its top outlet, which is then spirally discharged through the spiral air outlets 65 in the protective cap 64. This not only prevents external water pollutants from clogging the air outlets 65, but also improves the dissolution and oxygenation performance of wastewater. Furthermore, the different sizes of airflows sprayed from the aeration head 63 have different impact forces on the blocking block 66, resulting in different positions of the blocking block 66 inside the protective cap 64 and different numbers of air outlets 65 blocked, thus adjusting the air output with higher precision.

[0033] The stirring device 3 includes a stirring motor 31. A drive rod 32, extending longitudinally into the anaerobic tank 1, is mounted on the shaft of the stirring motor 31. The drive rod 32 is connected to a support rod 41. A transverse stirring rod 33 is also mounted on the drive rod 32, and shearing teeth 34 are provided on the stirring rod 33. While stirring with the stirring rod 33, the stirring device 3 also shears the water flow with the shearing teeth 34, breaking down large particles of impurities and improving the reaction efficiency between organic matter and microorganisms in the wastewater. The stirring device 3 also drives the anaerobic packing balls 42 on the support rod 41 to rotate, changing the reaction interface with the wastewater and improving the reaction effect.

Claims

1. An integrated multi-stage treatment system for knitting and dyeing wastewater, characterized in that: The system includes an anaerobic tank (1) and an aerobic tank (2) that are connected to each other. The anaerobic tank (1) is equipped with a stirring device (3), and the stirring device (3) is equipped with several anaerobic bioreactors (4). Each anaerobic bioreactor (4) includes a support rod (41) connected to the stirring device (3). Anaerobic packing balls (42) are rotatably connected to the upper and lower sides of the support rod (41) via a rotating shaft. The aerobic tank (2) is equipped with several stepped platforms (43). Adjacent platforms (43) are connected by a filter grid (44). The filter grid (44) is connected to an aerobic bioreactor (5) below the filter via a connecting bucket (45). The aerobic bioreactor (5) includes an outer casing (51). The outer casing (51) is covered with aerobic microorganisms. The inner box (52) is provided inside the box (51), and the inner box (52) is provided with aerobic biological packing material (53). The bottom of the aerobic tank (2) is provided with an aeration device (6). The outer box (51) and the end of the connecting bucket (45) are slidably connected up and down. The outlet of the connecting bucket (45) is fixedly connected to the inlet of the inner box (52). The end of the connecting bucket (45) is also fitted with a tension spring (46). One end of the tension spring (46) is connected to the outer box (51), and the other end of the tension spring (46) is connected to the inner box (52). The side of the inner box (52) is provided with a filter membrane. The inner side wall of the outer box (51) is provided with cleaning bristles (54). The bottom of the outer box (51) is provided with an outlet (511).

2. The integrated multi-stage treatment system for knitting and dyeing wastewater according to claim 1, characterized in that: The anaerobic packing ball (42) is rotatably connected to a rotating shaft (421) at its center. Several blades with a swirling, inclined shape are distributed around the circumference of the rotating shaft (421), and a flow gap is formed between adjacent blades.

3. The integrated multi-stage treatment system for knitting and dyeing wastewater according to claim 2, characterized in that: The blades include an upper blade (422) and a lower blade (423), which are staggered. Both the upper blade (422) and the lower blade (423) are formed by the intersection of several ribs (424), and the surface of the ribs (424) has a pleated structure.

4. The integrated multi-stage treatment system for knitting and dyeing wastewater according to claim 2, characterized in that: The anaerobic filler ball (42) is a mesh structure made of carbon fiber filaments; the blade is made of bamboo charcoal material.

5. The integrated multi-stage treatment system for knitting and dyeing wastewater according to claim 1, characterized in that: The aerobic biological packing material (53) includes a pair of mounting plates (531) distributed vertically. The mounting plates (531) are connected to the inner box (52) by a connecting spring (532). Several elastic fibers (533) are connected between the two mounting plates (531). Each elastic fiber (533) is symmetrically and crosswise wrapped with cellulose fiber (534) and bamboo charcoal fiber (535).

6. The integrated multi-stage treatment system for knitting and dyeing wastewater according to claim 1, characterized in that: The aeration device (6) includes an aeration pipe (61), an oxygenation pump (62) is provided at one end of the aeration pipe (61), a number of aeration heads (63) are provided on the aeration pipe (61), a protective cap (64) is provided at the top outlet of the aeration head (63), a number of spirally distributed air outlets (65) are provided on the side wall of the protective cap (64), and a blocking block (66) for blocking the air outlets (65) is provided inside the protective cap (64). The blocking block (66) is connected to the inner top of the protective cap (64) by a compression spring (67).

7. The integrated multi-stage treatment system for knitting and dyeing wastewater according to claim 1, characterized in that: The stirring device (3) includes a stirring motor (31), and a driving rod (32) extending longitudinally into the anaerobic tank (1) is provided on the shaft of the stirring motor (31). The driving rod (32) is connected to the support rod (41). A horizontal stirring rod (33) is also provided on the driving rod (32), and shearing teeth (34) are provided on the stirring rod (33).

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