Microbial integrated treatment system for printing and dyeing wastewater

Abstract

The invention relates to the technical field of sewage treatment, in particular to a printing and dyeing sewage microorganism integrated treatment system. Dye wastewater is treated by purely using a physical method, a chemical method and a biological method, so that the efficiency is low and the energy consumption is high. In order to solve the problems, the invention provides the microorganism filtering device which is sequentially divided into an anoxic zone and an aerobic zone which are communicated with each other along the longitudinal direction through the structural and position design of an inner cylinder, an outer cylinder and a horizontal partition plate; by means of the design, the filling area and variety of the microbial filler can be remarkably enlarged in a limited space, higher sewage treatment efficiency is obtained, and the device has higher treatment capacity and purification effect on printing and dyeing sewage with organic matter difficult to degrade.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a printing and dyeing sewage microbial integrated treatment system. Background Art

[0002] As an important branch of the textile industry, the printing and dyeing industry not only provides people with colorful textiles, but also produces a large amount of printing and dyeing wastewater. These wastewaters usually contain complex dyes, auxiliaries and a variety of chemical additives, which are characterized by high chroma, high COD concentration, poor biodegradability and strong toxicity, causing serious pollution to water bodies.

[0003] Traditional methods for treating printing and dyeing wastewater mainly include physical, chemical and biological methods. Although physical methods such as flocculation and sedimentation are simple and easy to use, they cannot completely remove soluble organic matter in water; although chemical methods such as oxidation have strong oxidation and decomposition capabilities, they have high investment and operation costs and there is a problem of secondary pollution; although biological methods are environmentally friendly and economical, they have limited effects on the removal of dye-related non-degradable organic matter. At present, a single treatment technology is difficult to meet the effect and economic requirements of printing and dyeing wastewater treatment, so it is urgent to develop an integrated and efficient printing and dyeing wastewater treatment system.

[0004] The integrated printing and dyeing wastewater treatment system can combine multiple treatment technologies, comprehensively utilize the advantages of physical, chemical and biological methods, improve treatment efficiency, and reduce operating costs. However, the integrated system in the existing technology still has many problems to be overcome in terms of stability, treatment efficiency and cost control. In addition, traditional treatment systems often require a large amount of chemical agents, which not only increases the treatment cost, but also increases the risk of secondary pollution. Therefore, for the field of printing and dyeing wastewater treatment, the development of an integrated biological treatment system that can ensure efficient removal of harmful substances and achieve low energy consumption, low cost and low emissions has great practical application value and broad market prospects. Summary of the invention

[0005] The existing problems in the prior art are: using only physical, chemical and biological methods to treat dye wastewater is inefficient and consumes a lot of energy. In view of the above problems, the present invention provides a microbial filtration device, which includes an inner cylinder and an outer cylinder, wherein the inner cylinder is vertically fixed inside the outer cylinder, the inner diameter of the outer cylinder is larger than the outer diameter of the inner cylinder, the height of the outer cylinder is larger than the height of the inner cylinder, and the outer cylinder is connected to the top of the inner cylinder but not to the bottom;

[0006] A containing cavity is formed between the outer cylinder and the inner cylinder, a water inlet is provided on the side wall at the bottom of the outer cylinder, the water inlet is communicated with the containing cavity, a fixing rod is vertically fixed at the bottom of the containing cavity, a plurality of horizontal partitions are sequentially passed through the fixing rod from bottom to top, the horizontal partitions divide the containing cavity into a plurality of treatment areas and overflow areas in the vertical direction, the treatment areas are filled with suspended microbial fillers, the treatment areas and overflow areas are communicated with each other through openings on the surface of the horizontal partitions, the treatment area adjacent to the overflow area is provided with a first micro-powered oxygen aeration device on its horizontal partition, the first micro-powered oxygen aeration system monitors and adjusts the concentration of dissolved oxygen around the horizontal partition in real time;

[0007] A filling frame is vertically fixed inside the inner cylinder, and the surface of the filling frame is circumferentially wrapped with carbon fiber cloth biological filler, which extends along the axial direction of the inner cylinder. A water outlet is opened on the side wall of the bottom of the inner cylinder, and a second micro-powered oxygen exposure device is also provided at the bottom of the inner cylinder.

[0008] Preferably, the fixing rod and the horizontal partition are connected by threaded fixing, and the horizontal partition can be displaced along the axial direction of the fixing rod. By changing the axial position of the horizontal partition, the volume of the space sandwiched by the horizontal partition is changed, thereby changing the volume ratio of each treatment area. According to the main pollutants in different printing and dyeing wastewater, the size of the biological treatment area corresponding to the specified pollutant is adjusted in time.

[0009] Preferably, there are three horizontal partitions, namely the first horizontal partition, the second horizontal partition and the third horizontal partition. The horizontal partitions are spaced apart in the accommodating space along the vertical direction, dividing the accommodating cavity into three processing areas and an overflow area along the vertical direction. The three processing areas are the first processing area, the second processing area and the third processing area. A first micro-power oxygen exposure device is arranged on the horizontal partition of the third processing area.

[0010] Preferably, a horizontal plate is provided on the top of the packing frame that is higher than the inner cylinder. The horizontal plate is used to fix the vibration motor. During the sewage treatment process, the vibration motor is turned on to make the packing frame vibrate. Experiments have shown that micro-vibration can maintain the appropriate thickness of the biofilm, reduce the obstruction of mass transfer between microorganisms and printing and dyeing sewage due to excessively thick biofilm, and reduce the treatment efficiency.

[0011] A printing and dyeing wastewater microbial integrated treatment system, which adopts the above-mentioned microbial filtration device, and its structure includes a filtration grid;

[0012] The filter grille is extended and enclosed in a circumferential direction to form a grille filter area; the grille filter area can perform preliminary filtration on the printing and dyeing wastewater, remove larger particles of impurities in the wastewater, improve subsequent treatment efficiency and reduce operation and maintenance costs.

[0013] The grille filtration area is provided with a baffle adjustment area, a microbial filtration device, a sedimentation area and a water outlet disinfection pool which are connected in sequence.

[0014] The fluid flow path in the baffle adjustment area is disc-shaped, which can improve mass transfer efficiency and reduce the phenomenon of fluid short circuit.

[0015] Preferably, the deflection adjustment area includes a water inlet, an outflow outlet and a closed flow chamber, the water inlet and the outflow outlet are respectively communicated with the side walls of the front and rear end surfaces of the flow chamber, and the flow chamber is provided with a plurality of upper baffles and a plurality of lower baffles horizontally spaced apart on the upper and lower surfaces of its inner wall along its axial direction, the upper baffles and the lower baffles are parallel and alternately distributed, one end of the upper baffle and the lower baffle are sealed and fixedly connected to the inner wall of the flow chamber, and the other end does not contact the inner wall of the flow chamber, so that the fluid can only flow forward in a disc shape alternately along the gap between the upper end of the lower baffle and the flow chamber and the gap between the lower end of the lower baffle and the flow chamber.

[0016] Preferably, the integrated microbial treatment system for printing and dyeing wastewater also includes a remote control system, which includes a temperature control system and a pH control system, and the remote control system monitors and adjusts the temperature and pH in the microbial filtration device in real time through the temperature control system and the pH control system.

[0017] The present invention has the following beneficial effects:

[0018] (1) The microbial filtration device of the present invention is a multi-stage microbial treatment device. The structure and position design of the inner cylinder, the outer cylinder and the horizontal partition divide the microbial filtration device into interconnected anoxic zones and aerobic zones in the longitudinal direction. This design can significantly expand the area and types of microbial fillers in a limited space, thereby achieving a higher sewage treatment efficiency. The device has a stronger treatment capacity and purification effect on printing and dyeing sewage containing organic matter that is difficult to degrade;

[0019] (2) In the microbial filtration device of the present invention, the structure and position design of the inner cylinder, the outer cylinder and the horizontal partition divide the microbial filtration device into interconnected anoxic zones and aerobic zones in sequence along its longitudinal direction, so that the dominant microbial flora in the inner cylinder and the outer cylinder can coexist, and the inner cylinder and the outer cylinder can respectively achieve efficient biodegradation of specific pollutants, which significantly improves the stability of the microbial filtration device in the sewage treatment process;

[0020] (3) The microbial filtration device in the present invention is a multi-stage microbial treatment device. The structure and position design of the inner cylinder, the outer cylinder and the horizontal partition divide the microbial filtration device into two anoxic zones and two aerobic zones that are interconnected along the longitudinal direction. This design makes the integrated microbial treatment system for printing and dyeing wastewater occupy a smaller area, and has lower energy consumption and cost, which is very suitable for the centralized treatment of small and medium-sized printing and dyeing wastewater.

[0021] (4) The operating parameters of the integrated microbial treatment system for printing and dyeing wastewater of the present invention can be automatically adjusted through a remote control room, without the need for manual on-site operation, which significantly reduces labor costs;

[0022] (5) The integrated microbial treatment system for printing and dyeing wastewater of the present invention uses a biofilm method to treat printing and dyeing wastewater, which can effectively remove toxic and harmful substances in wastewater in a low-carbon manner, and plays a positive role in improving environmental quality;

[0023] (6) The integrated microbial treatment system for printing and dyeing wastewater of the present invention has the characteristics of good environmental performance, high treatment efficiency, simple operation, low cost, etc., and can meet the strict requirements of modern printing and dyeing industry for wastewater treatment.

[0024] Instruction manual drawings:

[0025] Figure 1 : A schematic diagram of the process of sewage treatment by a printing and dyeing sewage microbial integrated treatment system provided by the present invention.

[0026] Figure 2 : A schematic structural diagram of a microbial filtration device provided by the present invention.

[0027] Figure 3 : A top view of the microbial filtration device of the present invention.

[0028] Figure 4 : Figure 3 Schematic diagram of the cross-sectional structure of the microbial filtration device in the AA direction.

[0029] Figure 5 : A schematic structural diagram of a baffled regulation zone in a printing and dyeing wastewater microbial integrated treatment system provided by the present invention.

[0030] In the figure: 1. outer cylinder, 1-2. hole, 1-3. water inlet, 1-4. fixing rod, 1-5. first horizontal baffle, 1-6. second horizontal baffle, 1-7. third horizontal baffle, 1-8. first treatment area, 1-9. second treatment area, 1-10. third treatment area, 1-11. overflow area, 2. inner cylinder, 2-1. packing rack, 2-2. horizontal plate, 2-3. water outlet, 2-4. carbon fiber cloth biological filler, 3. accommodating cavity, 4-1. lower baffle, 4-2. upper baffle, 4-3. flow chamber, 4-4. water inlet, 4-5. outflow port, 5. first micro-power aeration device, 6. first micro-power aeration device, 7. suspended microbial filler. DETAILED DESCRIPTION

[0031] The present invention is described in detail below with reference to the examples. However, it should be understood that the following examples are only illustrative of the embodiments of the present invention, and are not intended to limit the scope of the present invention.

[0032] like Figure 1-5 As shown, a printing and dyeing wastewater microbial integrated treatment system provided by the present invention includes a filter grille;

[0033] The filter grille extends circumferentially to form a closed grille filter area;

[0034] The grille filtration area is provided with a baffle adjustment area, a microbial filtration device, a sedimentation area and a water outlet disinfection pool which are connected in sequence.

[0035] The fluid flow path in the baffle adjustment area is disc-shaped.

[0036] The microbial filtration device comprises an inner tube 2 and an outer tube 1, wherein the inner tube 2 is vertically fixed inside the outer tube 1, the inner diameter of the outer tube 1 is larger than the outer diameter of the inner tube 2, the height of the outer tube 1 is larger than the height of the inner tube 2, and the outer tube 1 is connected to the top of the inner tube 2 but not to the bottom;

[0037] A containing cavity 3 is formed between the outer cylinder 1 and the inner cylinder 2, a water inlet 1-3 is provided on the side wall at the bottom of the outer cylinder 1, the water inlet 1-3 is communicated with the containing cavity 3, a fixing rod 1-4 is vertically fixedly provided at the bottom of the containing cavity 3, the fixing rod 1-4 is sequentially penetrated with a plurality of horizontal partitions from bottom to top, the horizontal partitions divide the containing cavity 3 into a plurality of treatment areas and overflow areas 1-11 in the vertical direction, the treatment areas are filled with suspended microbial fillers 7, the treatment areas and the overflow areas 1-11 are communicated with each other through the openings 1-2 on the surface of the horizontal partitions, the treatment area adjacent to the overflow area 1-11 is provided with a first micro-powered aeration device 5 on its horizontal partition, the first micro-powered aeration system monitors and adjusts the concentration of dissolved oxygen around the horizontal partition in real time;

[0038] A filling rack 2-1 is vertically fixed inside the inner cylinder 2, and a carbon fiber cloth biological filler 2-4 is circumferentially wrapped around the surface of the filling rack 2-1. The carbon fiber cloth biological filler 2-4 extends along the axial direction of the inner cylinder 2. A water outlet 2-3 is provided on the side wall of the bottom of the inner cylinder 2. A second micro-powered oxygen aeration device 6 is also provided at the bottom of the inner cylinder 2. The second micro-powered oxygen aeration system monitors and adjusts the concentration of dissolved oxygen around the bottom of the horizontal inner cylinder 2 in real time.

[0039] In a specific embodiment, the fixing rod 1-4 is fixedly connected to the horizontal partition by threads, and the horizontal partition can be displaced axially along the fixing rod 1-4.

[0040] In a specific embodiment, there are three horizontal partitions, namely the first horizontal partition, the second horizontal partition 1-6 and the third horizontal partition 1-7. The horizontal partitions are spaced apart in the accommodating space along the vertical direction, and the accommodating cavity 3 is divided into three processing areas and an overflow area 1-11 along the vertical direction. The three processing areas are the first processing area 1-8, the second processing area 1-9, and the third processing area 1-10. The first micro-power oxygen aeration device 5 is arranged on the horizontal partition of the third processing area 1-10.

[0041] In a specific embodiment, the deflection adjustment area includes a water inlet 4-4, an outflow outlet 4-5 and a closed flow chamber 4-3. The water inlet 4-4 and the outflow outlet 4-5 are respectively connected to the side walls of the front and rear end surfaces of the flow chamber 4-3. The flow chamber 4-3 is horizontally spaced along its axial direction on the upper and lower surfaces of its inner wall. The upper baffles 4-2 and the lower baffles 4-1 are parallel and staggered. One end of the upper baffle 4-2 and the lower baffle 4-1 are sealed and fixedly connected to the inner wall of the flow chamber 4-3, and the other ends do not contact the inner wall of the flow chamber 4-3. After the fluid is pumped in from the water inlet 4-4, it can only flow forward in a disc shape along the gap between the upper end of the lower baffle 4-1 and the flow chamber 4-3 and the gap between the lower end of the lower baffle 4-1 and the flow chamber 4-3 alternately, and flows out from the outflow outlet 4-5.

[0042] In a specific embodiment, a horizontal plate 2-2 is provided on the top of the filling frame 2-1 which is higher than the inner cylinder 2, and a vibration motor is fixedly provided on the upper part of the horizontal plate 2-2.

[0043] When used, the printing and dyeing sewage is first preliminarily filtered through the grating filtration area to remove impurities with larger particle sizes in the printing and dyeing sewage, and then pumped into the baffle adjustment area, and then enters the outer cylinder 1 of the microbial filtration device through the water inlet 1-3 connected to the microbial filtration device in the baffle adjustment area. The sewage flows from bottom to top, passes through the first treatment area 1-8, the second treatment area 1-9, the third treatment area 1-10 and the overflow area 1-11 in turn, and finally enters the inner cylinder 2 of the microbial filtration device from the top. When the sewage height in the inner cylinder 2 is lower than the top edge of the inner cylinder 2 and submerges the carbon fiber cloth biological filler 2-4 circumferentially wound on the surface of the filler frame 2-1, the water outlet 2-3 at the bottom of the inner cylinder 2 is opened, and the discharge speed of the sewage at the water outlet 2-3 is controlled so that the sewage liquid level in the inner cylinder 2 submerges the carbon fiber cloth biological filler 2-4 and is maintained at a certain height. The sewage continuously enters the sedimentation area from the water outlet 2-3 for chemical precipitation, and then enters the effluent disinfection tank for disinfection treatment.

[0044] The chemical precipitation reagent used in the sedimentation tank can be a polymer agent, such as polyacrylamide PAM, which is used to absorb suspended matter in the sewage, form larger agglomerates, and accelerate the sedimentation process. The effluent disinfection tank uses sewage ultraviolet lamps for disinfection.

[0045] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A microbial filtration device, characterized in that: The invention comprises an inner cylinder (2) and an outer cylinder (1), wherein the inner cylinder (2) is vertically fixed and placed inside the outer cylinder (1), the inner diameter of the outer cylinder (1) is greater than the outer diameter of the inner cylinder (2), the height of the outer cylinder (1) is greater than the height of the inner cylinder (2), and the outer cylinder (1) is connected to the top of the inner cylinder (2) but not to the bottom; A receiving cavity (3) is formed between the outer cylinder (1) and the inner cylinder (2); a water inlet (1-3) is provided on the side wall at the bottom of the outer cylinder (1); the water inlet (1-3) and the receiving cavity (3) are communicated with each other; a fixing rod (1-4) is vertically fixedly provided at the bottom of the receiving cavity (3); a plurality of horizontal partitions are sequentially passed through the fixing rod (1-4) from bottom to top; the horizontal partitions divide the receiving cavity (3) into a plurality of treatment areas and overflow areas (1-11) in the vertical direction; the treatment areas are filled with suspended microbial fillers (7); the treatment areas and the overflow areas (1-11) are communicated with each other through openings (1-2) on the surface of the horizontal partitions; a first micro-powered aeration device (5) is provided on the horizontal partition of the treatment area adjacent to the overflow area (1-11); the first micro-powered aeration system monitors and adjusts the concentration of dissolved oxygen around the horizontal partition in real time; A filling frame (2-1) is vertically fixedly placed inside the inner cylinder (2), and a carbon fiber cloth biological filler (2-4) is circumferentially wrapped around the surface of the filling frame (2-1). The carbon fiber cloth biological filler (2-4) extends along the axial direction of the inner cylinder (2). A water outlet (2-3) is provided on the side wall of the bottom of the inner cylinder (2), and a second micro-powered oxygen aeration device (6) is also provided at the bottom of the inner cylinder (2).

2. A microbial filtration device according to claim 1, characterized in that: The fixing rod (1-4) is fixedly connected to the horizontal partition plate by means of threads, and the horizontal partition plate can be displaced axially along the fixing rod (1-4).

3. A microbial filtration device according to claim 1, characterized in that: The horizontal partitions include three, namely a first horizontal partition, a second horizontal partition (1-6) and a third horizontal partition (1-7). The horizontal partitions are spaced apart in the accommodating space along the vertical direction, and divide the accommodating cavity (3) into three processing areas and an overflow area (1-11) along the vertical direction. The three processing areas are respectively a first processing area (1-8), a second processing area (1-9) and a third processing area (1-10). A first micro-powered oxygen aeration device (5) is arranged on the horizontal partition of the third processing area (1-10).

4. A microbial filtration device according to claim 1, characterized in that: The filling frame (2-1) is higher than the top of the inner cylinder (2) and is provided with a horizontal plate (2-2).

5. A printing and dyeing wastewater microbial integrated treatment system, characterized in that: A microbial filtration device comprising any one of claims 1 to 4.

6. The integrated microbial treatment system for printing and dyeing wastewater according to claim 5 is characterized in that: Including filter grille; The filter grille extends circumferentially to form a closed grille filter area; The grille filtration area is provided with a baffle adjustment area, a microbial filtration device, a sedimentation area and a water outlet disinfection pool which are connected in sequence. The fluid flow path in the baffle adjustment area is disc-shaped.

7. The integrated microbial treatment system for printing and dyeing wastewater according to claim 6 is characterized in that: It also includes a remote control system, which includes a temperature control system and a pH control system. The remote control system monitors and adjusts the temperature and pH in the microbial filtration device in real time through the temperature control system and the pH control system.

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