A multi-stage co-treatment system for kitchen waste and wastewater

Abstract

This utility model discloses a multi-stage synergistic treatment system for kitchen waste wastewater, comprising a rotary bar screen, a cyclone grit chamber, an inclined plate grease trap, a biological aeration tank, and a deep treatment tank connected in sequence. The rotary bar screen contains a filter screen. The cyclone grit chamber is connected to the inclined plate grease trap via a pump. The inclined plate grease trap contains an inclined plate layer, with an oil scraping assembly above the inclined plate layer. A bottom overflow port is provided between the bottom of the inclined plate grease trap and the biological aeration tank. The biological aeration tank contains a hanging basket with biological packing material, and an aeration assembly is located at the bottom of the biological aeration tank. An top overflow port is provided between the top of the biological aeration tank and the deep treatment tank. The deep treatment tank contains activated carbon filter layers and ultraviolet disinfection components arranged vertically. This utility model employs a three-stage synergistic treatment, integrating physical separation, biochemical degradation, and disinfection modules. It can achieve automatic collection of solid sludge and grease, with high separation efficiency, low treatment cost, short cycle, and ensures that COD and grease removal rates meet standards.

Description

Technical Field

[0001] This utility model relates to the field of kitchen wastewater treatment technology, and in particular to a multi-stage collaborative treatment system for kitchen wastewater. Background Technology

[0002] Food waste wastewater contains grease, suspended solids, and easily perishable organic matter, resulting in a high pollutant load and easy clogging of pipes. Traditional treatment equipment, such as grease traps, has low separation efficiency and low grease removal rate, requires manual cleaning, and produces a strong odor. Alternatively, air flotation / biological treatment equipment can be used, but it has high operating costs, large footprint, complex operation, and excessively long treatment cycles. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a multi-stage collaborative treatment system for kitchen waste wastewater, which aims to solve the technical problems of low separation efficiency, need for manual sludge removal, high operating costs and long treatment cycles in the existing technology.

[0004] The technical solution of this utility model is: a multi-stage co-treatment system for kitchen waste wastewater, comprising a rotary bar screen, a cyclone grit chamber, an inclined plate grease trap, a biological aeration tank, and a deep treatment tank connected in sequence; the rotary bar screen is equipped with a filter screen, and the filtrate filtered by the filter screen enters the cyclone grit chamber; the cyclone grit chamber is connected to the inclined plate grease trap via a transfer pump, and the clear liquid separated by the cyclone separation is transported to the inclined plate grease trap via the transfer pump; the inclined plate grease trap is equipped with an inclined plate layer, and an oil scraping component is provided above the inclined plate layer; a bottom overflow port is provided between the bottom of the inclined plate grease trap and the biological aeration tank; the biological aeration tank is equipped with a hanging basket, and the hanging basket is equipped with biological packing material; an aeration component is provided at the bottom of the biological aeration tank; an top overflow port is provided between the top of the biological aeration tank and the deep treatment tank; and activated carbon filter layers and ultraviolet disinfection components are arranged vertically inside the deep treatment tank.

[0005] Furthermore, the rotary bar screen of this invention has an inlet pipe at the top and an outlet pipe at the bottom. The outlet pipe is inserted horizontally into the top of the vortex grit chamber. The lower part of the rotary bar screen has a downwardly inclined slag discharge pipe, and a slag discharge valve is installed inside the slag discharge pipe.

[0006] Furthermore, the filter screen in this utility model includes a central shaft driven by a motor at the center of the rotating bar screen machine, and two rotating bar screens respectively connected to the central shaft. The two rotating bar screens and the inner wall of the rotating bar screen machine form an enclosing space.

[0007] Furthermore, the vortex sedimentation tank of this utility model is equipped with an upper liquid level detection sensor and a lower liquid level detection sensor, the bottom of the vortex sedimentation tank is inverted conical shape, and a sand discharge valve is provided in the bottom outlet of the vortex sedimentation tank.

[0008] Furthermore, in this utility model, one end of the delivery pump is connected to the cyclone sedimentation tank via a liquid extraction pipe, the liquid extraction pipe extends to the bottom of the cyclone sedimentation tank, and a filter screen is provided at the opening of the liquid extraction pipe; the other end of the delivery pump is connected to the inclined plate oil separator via a liquid discharge pipe, and a number of spaced liquid outlets are provided at the bottom of the liquid discharge pipe.

[0009] Furthermore, in this utility model, an oil collection trough is provided on one side of the top of the inclined plate oil separator, an oil level sensor is provided in the oil collection trough, and the oil scraping assembly is located on one side of the oil collection trough.

[0010] Furthermore, the hanging basket described in this utility model includes a lower basket, an upper basket, and a handle connecting the lower basket and the upper basket. The biological filler is provided inside both the lower basket and the upper basket, and a cover net is provided on the top of both the lower basket and the upper basket.

[0011] Furthermore, the inner wall of the biological aeration tank in this utility model is provided with a lower surrounding ring and an upper surrounding ring that respectively cooperate with the lower basket and the upper basket. The bottom of the lower basket is provided with a groove, and the lower surrounding ring is provided with a boss that cooperates with the groove.

[0012] Furthermore, the aeration component of this invention includes an air pump and a nano-aeration tube connected to the air pump, wherein the nano-aeration tube is horizontally arranged at the bottom of the biological aeration tank.

[0013] Furthermore, the ultraviolet disinfection assembly described in this utility model includes a plurality of ultraviolet disinfection lamps arranged around the inner wall of the deep treatment tank, and each ultraviolet disinfection lamp is covered with a glass cover.

[0014] Compared with the prior art, this utility model has the following advantages: This utility model adopts a three-stage synergistic treatment, integrating physical separation, biochemical degradation, and disinfection modules, which can realize the automatic collection of solid sludge and grease without manual sludge cleaning. It has high separation efficiency, low treatment cost, and short treatment cycle, and can ensure that the COD removal rate and grease removal rate meet the standards. The treatment system can solve the problems of high grease and easy clogging in kitchen waste wastewater through a combination of physical graded pretreatment and compact biological treatment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2This is a schematic diagram of the slag unloading state of the rotary bar screen described in this utility model;

[0017] Figure 3 This is a schematic diagram of the specific structure of the hanging basket described in this utility model.

[0018] in:

[0019] 1. Rotary bar screen; 1a. Inlet pipe; 1b. Outlet pipe; 1c. Slag discharge pipe; 1d. Slag discharge valve;

[0020] 2. Swirl-flow grit chamber; 2a. Upper liquid level sensor; 2b. Lower liquid level sensor; 2c. Sand discharge valve;

[0021] 3. Inclined plate grease trap; 4. Biological aeration tank; 5. Deep treatment tank;

[0022] 6. Filter screen; 601. Central shaft; 602. Rotating grid;

[0023] 7. Transfer pump; 8. Inclined plate layer; 9. Oil scraper assembly; 10. Lower overflow port;

[0024] 11. Hanging basket; 1101. Lower basket body; 1101a. Groove; 1102. Upper basket body; 1103. Handle; 1104. Cover net;

[0025] 12. Biological packing material;

[0026] 13. Aeration components; 1301. Air pump; 1302. Nano-aeration pipes;

[0027] 14. Top overflow outlet; 15. Activated carbon filter layer;

[0028] 16. Ultraviolet disinfection components; 1601. Ultraviolet disinfection lamp; 1602. Glass cover;

[0029] 17. Suction tube; 17a. Filter screen;

[0030] 18. Drainage pipe; 18a. Liquid outlet;

[0031] 19. Oil collection tank; 20. Oil level sensor;

[0032] 21. Lower enclosing ring; 21a. Boss;

[0033] 22. Upper enclosing ring; A. Enclosing space. Detailed Implementation

[0034] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0035] Example:

[0036] The accompanying drawings illustrate a specific implementation of a multi-stage co-treatment system for kitchen waste and wastewater according to this utility model. Figure 1 It mainly includes a rotating bar screen 1, a cyclone grit chamber 2, an inclined plate grease trap 3, a biological aeration tank 4, and a deep treatment tank 5 connected in sequence. It is used to treat kitchen waste wastewater in sequence. First, the solid sludge is intercepted and filtered and the sand and gravel are separated. Then, the floating grease is scraped off. Next, the organic matter is biochemically degraded and finally sterilized to meet the discharge standards.

[0037] The rotary bar screen 1 has an inlet pipe 1a at the top for feeding in kitchen waste wastewater. The rotary bar screen 1 has an outlet pipe 1b at the bottom, which is inserted horizontally into the top of the cyclone grit chamber 2, through which the filtrate is discharged. The rotary bar screen 1 also has a downwardly inclined discharge pipe 1c at its lower part, containing a discharge valve 1d. Opening the discharge valve 1d allows solid slag to be discharged through the discharge pipe 1c.

[0038] The rotary bar screen 1 contains a filter screen 6. The filter screen 6 includes a central shaft 601 driven to rotate by a motor at the center of the rotary bar screen 1, and two rotating bar screens 602 connected to the central shaft 601. The two rotating bar screens 602 and the inner wall of the rotary bar screen 1 form an enclosing space A. In the filtering state, as... Figure 1 As shown, kitchen waste wastewater is fed in through inlet pipe 1a, filtered by filter screen 6, and the filtrate enters the cyclone grit chamber 2, where solids are trapped in the surrounding space A; during the sludge discharge phase, as... Figure 2 As shown, the solid slag can be discharged by using a motor to drive the filter screen 6 to rotate to the slag discharge pipe 1c.

[0039] The filtrate entering the cyclone grit chamber 2 enters tangentially and rotates along the inner wall of the cyclone grit chamber 2 in a swirling motion. The cyclone grit chamber 2 is equipped with an upper level sensor 2a and a lower level sensor 2b. The upper level sensor 2a controls the influent, and the lower level sensor 2b controls the effluent. The bottom of the cyclone grit chamber 2 is inverted conical, utilizing centrifugal force to separate sand and gravel. A sand discharge valve 2c is installed at the bottom outlet of the cyclone grit chamber 2, and the settled sand and gravel are periodically discharged through the sand discharge valve 2c.

[0040] The cyclone sedimentation tank 2 is connected to the inclined plate oil separator 3 via a transfer pump 7. One end of the transfer pump 7 is connected to the cyclone sedimentation tank 2 via a suction pipe 17, which extends to the bottom of the cyclone sedimentation tank 2. The clear liquid separated by cyclone separation is drawn out through the suction pipe 17 by the transfer pump 7. A filter screen 17a is provided at the opening of the suction pipe 17 to prevent sand and gravel from entering the pipe. The other end of the transfer pump 7 is connected to the inclined plate oil separator 3 via a drain pipe 18. The bottom of the drain pipe 18 is provided with several spaced outlets 18a. The drawn clear liquid is evenly sent to the inclined plate oil separator 3 through the outlets 18a of the drain pipe 18.

[0041] The inclined plate grease trap 3 has an inclined plate layer 8. The clear liquid discharged from the outlet 18a passes through the inclined plate layer 8, which can effectively separate grease. Above the inclined plate layer 8 is an oil scraping component 9, which scrapes away the floating grease. The oil scraping component 9 is existing technology and will not be described in detail here. An oil collection tank 19 is provided on one side of the top of the inclined plate grease trap 3. An oil level sensor 20 is installed in the oil collection tank 19. The oil scraping component 9 is located on one side of the oil collection tank 19. The oil scraping component 9 scrapes the floating oil into the oil collection tank 19 at regular intervals. The oil level sensor 20 is used to detect the oil level in the oil collection tank 19 in real time to prevent overflow.

[0042] An overflow outlet 10 is provided between the bottom of the inclined plate oil separator 3 and the biological aeration tank 4, and the clean water of the inclined plate oil separator 3 overflows from the bottom into the biological aeration tank 4.

[0043] The biological aeration tank 4 is equipped with a hanging basket 11, combined with Figure 3 The hanging basket 11 includes a lower basket 1101, an upper basket 1102, and a handle 1103 connecting the lower basket 1101 and the upper basket 1102. Both the lower basket 1101 and the upper basket 1102 are equipped with biological packing material 12, and both the lower basket 1101 and the upper basket 1102 are equipped with a cover net 1104. The inner wall of the biological aeration tank 4 is provided with a lower surrounding ring 21 and an upper surrounding ring 22 that respectively cooperate with the lower basket 1101 and the upper basket 1102. The bottom of the lower basket 1101 is provided with a groove 1101a, and the lower surrounding ring 21 is provided with a boss 21a that cooperates with the groove 1101a. The hanging basket 11 is suspended. When lowering it, the lower basket 1101 is placed on the lower surrounding ring 21 for positioning and installation. The upper basket 1102 is fitted with the upper surrounding ring 22. The clear water overflowing into the biological aeration tank 4 flows upward and is fully degraded by the two layers of biological packing material 12.

[0044] The bottom of the biological aeration tank 4 is provided with an aeration component 13, which includes an air pump 1301 and a nano-aeration pipe 1302 connected to the air pump 1301. The nano-aeration pipe 1302 is horizontally arranged at the bottom of the biological aeration tank 4, and aeration can enhance the aerobic reaction.

[0045] An overflow port 14 is provided between the top of the biological aeration tank 4 and the top of the deep treatment tank 5, and the clean water from the biological aeration tank 4 overflows from the top into the deep treatment tank 5.

[0046] The deep treatment tank 5 has an activated carbon filter layer 15 and an ultraviolet disinfection component 16 arranged vertically inside. The ultraviolet disinfection component 16 includes several ultraviolet disinfection lamps 1601 arranged around the inner wall of the deep treatment tank 5, and each ultraviolet disinfection lamp 1601 is covered with a glass cover 1602. The clean water entering the deep treatment tank 5 is finally filtered by the activated carbon filter layer 15 to adsorb residual organic matter, and then sterilized by ultraviolet light before being discharged in compliance with standards. The bottom of the deep treatment tank 5 is equipped with a discharge pipe for discharging the compliant effluent.

[0047] Of course, the above embodiments are only for illustrating the technical concept and features of this utility model, and their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All modifications made in accordance with the spirit and essence of the main technical solution of this utility model should be covered within the protection scope of this utility model.

Claims

1. A multi-stage synergistic treatment system for food waste wastewater, characterized in that: The system includes a rotating bar screen (1), a cyclone sedimentation tank (2), an inclined plate oil separator (3), a biological aeration tank (4), and a deep treatment tank (5) connected in sequence. The rotating bar screen (1) is equipped with a filter screen (6), and the filtrate filtered by the filter screen (6) enters the cyclone sedimentation tank (2). The cyclone sedimentation tank (2) is connected to the inclined plate oil separator (3) via a transfer pump (7), and the clear liquid separated by the cyclone separation is transported to the inclined plate oil separator (3) via the transfer pump (7). The inclined plate oil separator (3) is equipped with an inclined plate layer (8). An oil scraping assembly (9) is provided above the inclined plate oil separator (3) and the bottom of the biological aeration tank (4); a hanging basket (11) is provided in the biological aeration tank (4), and biological packing material (12) is provided in the hanging basket (11); an aeration assembly (13) is provided at the bottom of the biological aeration tank (4); an upper overflow port (14) is provided between the top of the biological aeration tank (4) and the deep treatment tank (5); and activated carbon filter layer (15) and ultraviolet disinfection assembly (16) are arranged vertically in the deep treatment tank (5).

2. The multi-stage synergistic treatment system for kitchen waste and wastewater according to claim 1, characterized in that: The rotary bar screen (1) is provided with an inlet pipe (1a) at the top and an outlet pipe (1b) at the bottom. The outlet pipe (1b) is inserted horizontally into the top of the vortex grit chamber (2). The rotary bar screen (1) is provided with a downwardly inclined slag discharge pipe (1c) at the bottom. The slag discharge pipe (1c) is provided with a slag discharge valve (1d).

3. The multi-stage synergistic treatment system for kitchen waste and wastewater according to claim 2, characterized in that: The filter screen (6) includes a central shaft (601) located at the center of the rotary bar screen machine (1) and driven to rotate by a motor, and two rotary bars (602) respectively connected to the central shaft (601). The two rotary bars (602) form an enclosing space (A) between themselves and the inner wall of the rotary bar screen machine (1).

4. The multi-stage synergistic treatment system for kitchen waste and wastewater according to claim 1, characterized in that: The vortex sedimentation tank (2) is equipped with an upper liquid level detection sensor (2a) and a lower liquid level detection sensor (2b). The bottom of the vortex sedimentation tank (2) is inverted conical. The bottom outlet of the vortex sedimentation tank (2) is equipped with a sand discharge valve (2c).

5. The multi-stage synergistic treatment system for kitchen waste and wastewater according to claim 4, characterized in that: One end of the delivery pump (7) is connected to the vortex sedimentation tank (2) through a liquid extraction pipe (17), the liquid extraction pipe (17) extends to the bottom of the vortex sedimentation tank (2), and a filter screen (17a) is provided at the pipe opening of the liquid extraction pipe (17); the other end of the delivery pump (7) is connected to the inclined plate oil separator (3) through a drain pipe (18), and a number of spaced outlets (18a) are provided at the bottom of the drain pipe (18).

6. The multi-stage synergistic treatment system for kitchen waste and wastewater according to claim 1, characterized in that: An oil collection trough (19) is provided on one side of the top of the inclined plate oil separator (3), an oil level sensor (20) is provided in the oil collection trough (19), and the oil scraping assembly (9) is located on one side of the oil collection trough (19).

7. The multi-stage synergistic treatment system for kitchen waste and wastewater according to claim 1, characterized in that: The hanging basket (11) includes a lower basket (1101), an upper basket (1102), and a handle (1103) connecting the lower basket (1101) and the upper basket (1102). The lower basket (1101) and the upper basket (1102) are both provided with the biological filler (12), and the top of the lower basket (1101) and the upper basket (1102) are both provided with a cover net (1104).

8. The multi-stage synergistic treatment system for kitchen waste and wastewater according to claim 7, characterized in that: The inner wall of the biological aeration tank (4) is provided with a lower surrounding ring (21) and an upper surrounding ring (22) that respectively cooperate with the lower basket (1101) and the upper basket (1102). The bottom of the lower basket (1101) is provided with a groove (1101a), and the lower surrounding ring (21) is provided with a boss (21a) that cooperates with the groove (1101a).

9. The multi-stage synergistic system for processing kitchen waste water according to claim 1, characterized in that: The aeration component (13) includes an air pump (1301) and a nano-aeration tube (1302) connected to the air pump (1301). The nano-aeration tube (1302) is arranged horizontally at the bottom of the biological aeration tank (4).

10. The multi-stage synergistic system for processing kitchen waste water according to claim 1, characterized in that: The ultraviolet disinfection assembly (16) includes a plurality of ultraviolet disinfection lamps (1601) arranged around the inner wall of the deep treatment tank (5), and each ultraviolet disinfection lamp (1601) is covered with a glass cover (1602).

Images