Distributed domestic sewage treatment system

Abstract

The utility model relates to the related technical field of sewage treatment, in particular to a distributed domestic sewage treatment system which comprises a treatment box, and a sewage treatment mechanism is arranged in the treatment box. According to the distributed domestic sewage treatment system, through the arrangement of the sewage treatment mechanism, sewage is firstly collected into the anoxic zone, the sewage is filtered from a grating to remove solid impurities in the sewage and flows down along an inclined plate, and the sewage in the anoxic zone flows into the aerobic zone from an opening in the bottom, so that the biological phosphorus removal effect is achieved; after the water level of the anoxic zone reaches a certain position, the sewage flows into the enhanced treatment zone through a perforated plate, after the sewage flows through an MBBR filler carrier, a biological membrane is formed on the carrier, and organic pollutants in the sewage are degraded while microorganisms massively propagate and grow on the biological membrane, so that the effect of purifying the sewage is achieved; and the water circularly flows through the filler carrier through the water suction pump, and the purified water can be discharged from the water outlet by screwing the water valve.

Description

Technical Field

[0001] The utility model relates to the technical field related to sewage treatment, and in particular to a decentralized domestic sewage treatment system. Background Art

[0002] In densely populated areas with well-developed pipe networks, municipal centralized treatment facilities are often used for sewage treatment. However, due to geographical factors and dispersed population, there are serious problems in sewage collection and treatment in decentralized residential and rural areas outside cities. Domestic sewage containing high levels of substances such as nitrogen, phosphorus, and pathogens is often directly discharged into nearby water bodies, which can easily cause eutrophication of surface water and damage the ecological environment. Among the decentralized sewage treatment technologies based on nature, anaerobic digesters, stabilization ponds, artificial wetlands, and soil infiltration technologies all achieve low-energy operation. In recent years, another innovative biofilm reactor has attracted much attention from researchers. It was developed to solve the complex operations of fixed-bed reactors that require regular backwashing, fluidized beds that require carrier fluidization, and submerged biofilters that require cleaning of filter media and replacement of aerators when blocked. Therefore, a decentralized domestic sewage treatment system is particularly needed.

[0003] However, the existing decentralized domestic sewage treatment system is often directly discharged into the water body because domestic sewage containing high levels of substances such as nitrogen, phosphorus, and pathogens can easily cause eutrophication of surface water and damage the ecological environment. In addition, the fixed bed reactor needs to be backwashed regularly, the fluidized bed needs to fluidize the carrier, and the submerged biological filter needs to clean the filter material and replace the aerator when it is blocked, which makes the operation more complicated. Utility Model Content

[0004] The purpose of the utility model is to provide a decentralized domestic sewage treatment system to solve the problems of the existing decentralized domestic sewage treatment system proposed in the above background technology, because domestic sewage containing high levels of substances such as nitrogen, phosphorus, pathogens, etc. is often directly discharged into the water body, which is easy to cause eutrophication of surface water and cause ecological environment damage, and the fixed bed reactor needs to be backwashed regularly, the fluidized bed needs to fluidize the carrier, and the submerged biological filter needs to clean the filter material and replace the aerator when it is blocked, which makes the operation more complicated.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a decentralized domestic sewage treatment system, comprising a treatment box, a water outlet is fixedly connected to one side of the surface of the treatment box, a sewage treatment mechanism is arranged inside the treatment box, a fixing mechanism is arranged inside the treatment box, and a water valve is installed on one side of the surface of the water outlet;

[0006] The sewage treatment mechanism includes an anoxic zone, an aerobic zone, an enhanced treatment zone, a water pump, a sludge pump, an opening, a perforated plate, a grille, an inclined plate, an aerator and an MBBR. The anoxic zone is opened inside the treatment box, the aerobic zone is opened inside the treatment box, the enhanced treatment zone is opened inside the treatment box, a water pump is installed on one side of the surface of the treatment box, a sludge pump is installed on one side of the surface of the treatment box, an opening is opened on one side of the inner surface of the treatment box, a perforated plate is fixedly connected to one side of the inner surface of the treatment box, a grille is installed on one side of the surface of the anoxic zone, an inclined plate is installed on one side of the surface of the anoxic zone, an aerator is installed in the aerobic zone, and an MBBR is installed in the enhanced treatment zone.

[0007] Preferably, the opening is opened on one side of the connection between the anoxic zone and the aerobic zone, and the perforated plate is installed on one side of the connection between the aerobic zone and the enhanced treatment zone.

[0008] Preferably, the height of the inclined plate is greater than the height of the enhanced treatment zone, and the inclined plate is fixedly connected to one side of the grille surface and forms an angle of thirty degrees with the grille.

[0009] Preferably, the fixing mechanism includes a mounting frame, a limiting column, a hasp lock, a movable block and a through hole, a mounting frame is installed on one side of the inner surface of the processing box, a limiting column is fixedly connected to one side of the inner surface of the mounting frame, a hasp lock is installed on one side of the surface of the mounting frame, a movable block is installed on one side of the surface of the mounting frame, and a through hole is opened on one side of the surface of the movable block.

[0010] Preferably, the buckle locks are installed on one side of the surface of the movable block, and two groups of the buckle locks are provided.

[0011] Preferably, the decentralized domestic sewage treatment system as described above is characterized by comprising the following steps:

[0012] S1. Collect the sewage into the anoxic zone, filter the sewage through the screen to remove solid impurities in the sewage and flow down along the inclined plate;

[0013] S2. The sewage in the anoxic zone flows into the aerobic zone from the opening at the bottom. The microorganisms in the aerobic zone can use oxygen to decompose organic matter into inorganic matter. Nitrifying bacteria can oxidize ammonia nitrogen into nitrates and absorb phosphates in the sewage and store them in their bodies. When these microorganisms die and decompose, phosphates will be released, thus achieving the effect of biological phosphorus removal. The aerator accelerates the reaction in the anoxic zone.

[0014] S3. When the water level in the anoxic zone reaches a certain position, the sewage flows into the enhanced treatment zone through the perforated plate. After the sewage flows through the MBBR filler carrier, a biofilm is formed on the carrier. Microorganisms multiply and grow in large numbers on the biofilm while degrading organic pollutants in the sewage, thereby purifying the sewage. The water is circulated through the filler carrier by a water pump, and the purified water can be released from the outlet by turning the water valve.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the decentralized domestic sewage treatment system is provided with MBBR. As a new type of biofilm reactor, MBBR is an improved new type of composite biofilm reactor developed on the basis of fixed bed reactor, fluidized bed reactor and biological filter. It overcomes the shortcomings of fixed bed reactor requiring regular backwashing, fluidized bed reactor requiring carrier fluidization, and submerged biological filter requiring complex operations of cleaning filter material and replacing aerator, while retaining the characteristics of traditional biofilm method of resistance to shock load, low sludge production and long sludge age. Compared with the activated sludge method, due to the longer sludge age, more nitrifying bacteria can be maintained, and the denitrification effect is better. After the sewage continuously flows through the reactor filler carrier, a biofilm is formed on the carrier. Microorganisms multiply and grow in large numbers on the biofilm while degrading organic pollutants in the sewage, thereby purifying the sewage. In addition, through the setting of the inclined plate, the problem of low treatment efficiency of domestic sewage due to excessive water inlet load can be solved, so that the decentralized domestic sewage treatment system can stably meet the discharge standards for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the side cross-sectional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the sewage treatment mechanism of the utility model;

[0018] Figure 3 This is a schematic diagram of the fixing mechanism structure of the utility model;

[0019] Figure 4 For this utility model Figure 2 Enlarged structural diagram at A in the middle.

[0020] In the figure: 1. treatment box; 2. water outlet; 3. sewage treatment mechanism; 301. anoxic zone; 302. aerobic zone; 303. enhanced treatment zone; 304. water pump; 305. mud pump; 306. opening; 307. perforated plate; 308. grille; 309. inclined plate; 310. aerator; 311. MBBR; 4. fixing mechanism; 401. mounting frame; 402. limit column; 403. buckle lock; 404. movable block; 405. through hole; 5. water valve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 The utility model provides a technical solution: a decentralized domestic sewage treatment system, comprising a treatment box 1, a water outlet 2 is fixedly connected to one side of the surface of the treatment box 1, a sewage treatment mechanism 3 is arranged inside the treatment box 1, a disassembly mechanism 4 is arranged inside the treatment box 1, and a water valve 5 is installed on one side of the surface of the water outlet 2;

[0023] The sewage treatment mechanism 3 includes an anoxic zone 301, an aerobic zone 302, an enhanced treatment zone 303, a water pump 304, a sludge pump 305, an opening 306, a perforated plate 307, a grille 308, an inclined plate 309, an aerator 310 and an MBBR 311. The anoxic zone 301 is opened inside the treatment box 1, the aerobic zone 302 is opened inside the treatment box 1, the enhanced treatment zone 303 is opened inside the treatment box 1, the water pump 304 is installed on one side of the surface of the treatment box 1, the sludge pump 305 is installed on one side of the surface of the treatment box 1, the opening 306 is opened on one side of the inner surface of the treatment box 1, and the inner surface of the treatment box 1 is opened on one side. A perforated plate 307 is fixedly connected, a grille 308 is installed on one side of the surface of the anoxic zone 301, an inclined plate 309 is installed on one side of the surface of the anoxic zone 301, an aerator 310 is installed inside the aerobic zone 302, and an MBBR 311 is installed inside the enhanced treatment zone 303. Through the arrangement of the anoxic zone 301, the aerobic zone 302, the enhanced treatment zone 303, the water pump 304, the mud pump 305, the opening 306, the perforated plate 307, the grille 308, the inclined plate 309, the aerator 310 and the MBBR 311, the sewage is first collected in the anoxic zone 301, and the sewage is filtered from the grille 308 to remove solid impurities in the sewage. The anoxic zone 301 provides an environment suitable for the growth and metabolism of denitrifying bacteria. Through the denitrification of the anoxic zone 301, the nitrate in the sewage is effectively removed, and the organic matter is also degraded, thereby improving the water purification effect. After that, the sewage in the anoxic zone 301 flows into the aerobic zone 302 from the bottom opening 306. The microorganisms in the aerobic zone 302 can use oxygen to decompose the organic matter into inorganic matter. The nitrifying bacteria can oxidize ammonia nitrogen into nitrate and absorb the phosphate in the sewage and store it in their bodies. When these microorganisms die and decompose, the phosphate will be released, thereby achieving biological removal. The aerator 310 accelerates the reaction in the anoxic zone 301. After the water level in the anoxic zone 301 reaches a certain position, the sewage flows into the enhanced treatment zone 303 through the perforated plate 307. After the sewage flows through the MBBR311 filler carrier, a biofilm is formed on the carrier. Microorganisms multiply and grow in large numbers on the biofilm while degrading organic pollutants in the sewage, thereby purifying the sewage. The water is circulated through the filler carrier by the water pump 304. The purified water can be released from the water outlet 2 by turning the water valve 5. The sludge in the enhanced treatment zone 303 can be discharged from the treatment tank 1 through the setting of the sludge pump 305.

[0024] Furthermore, an opening 306 is provided at one side of the connection between the anoxic zone 301 and the aerobic zone 302, and a perforated plate 307 is installed at one side of the connection between the aerobic zone 302 and the enhanced treatment zone 303. Through the setting of the opening 306, the sewage filtered by the grille 308 can flow from the anoxic zone 301 into the aerobic zone 302 through the opening 306.

[0025] Furthermore, the height of the inclined plate 309 is greater than the height of the enhanced treatment zone 303. The inclined plate 309 is fixedly connected to one side of the surface of the grille 308 and forms a thirty-degree angle with the grille 308. Through the arrangement of the inclined plate 309, an additional layer of resistance is provided when the sewage flows down from the grille 308, thereby making the flow rate of the sewage in the anoxic zone 301 more uniform when flowing into the aerobic zone 302.

[0026] Furthermore, the fixing mechanism 4 includes a mounting frame 401, a limiting column 402, a buckle lock 403, a movable block 404 and a through hole 405. The mounting frame 401 is installed on one side of the inner surface of the processing box 1, and the limiting column 402 is fixedly connected to one side of the inner surface of the mounting frame 401. The buckle lock 403 is installed on one side of the surface of the mounting frame 401. The movable block 404 is installed on one side of the surface of the mounting frame 401. The through hole 405 is opened on one side of the surface of the movable block 404. 04 and the through hole 405, MBBR311 is placed inside the mounting frame 401, and the bottom of MBBR311 passes through the limiting column 402. After placement, the movable block 404 is closed, and the buckle lock 403 is closed to limit MBBR311 inside the enhanced treatment area 303 to prevent MBBR311 from shaking and affecting the reaction with sewage. Through the setting of the through hole 405, when MBBR311 needs to be taken out, the buckle lock 403 is opened and the through hole 405 is pulled up, and the through hole 405 drives the movable block 404 to open.

[0027] Furthermore, the snap lock 403 is installed on one side of the surface of the movable block 404. Two groups of snap locks 403 are provided. Through the provision of the snap locks 403, the movable block 404 is fixed on one side of the surface of the mounting frame 401, thereby limiting the position of the MBBR311.

[0028] Furthermore, as the above-mentioned decentralized domestic sewage treatment system, it is characterized by comprising the following steps;

[0029] S1, collecting sewage into the anoxic zone 301, filtering the sewage through the grid 308 to remove solid impurities in the sewage and flowing down along the inclined plate 309;

[0030] S2. The sewage in the anoxic zone 301 flows into the aerobic zone 302 from the bottom opening 306. The microorganisms in the aerobic zone 302 can use oxygen to decompose organic matter into inorganic matter. Nitrifying bacteria can oxidize ammonia nitrogen into nitrates and absorb phosphates in the sewage and store them in the body. When these microorganisms die and decompose, phosphates will be released, thereby achieving the effect of biological phosphorus removal. The aerator 310 accelerates the reaction in the anoxic zone 301.

[0031] S3. After the water level in the anoxic zone 301 reaches a certain position, the sewage flows into the enhanced treatment zone 303 through the perforated plate 307. After the sewage flows through the MBBR311 filler carrier, a biofilm is formed on the carrier. Microorganisms multiply and grow in large numbers on the biofilm while degrading organic pollutants in the sewage, thereby purifying the sewage. The water is circulated through the filler carrier by the water pump 304, and the purified water can be released from the water outlet 2 by turning the water valve 5.

[0032] Working principle: First, the sewage is collected in the anoxic zone 301. The sewage is filtered from the grille 308 to remove solid impurities in the sewage and flows down the inclined plate 309. The anoxic zone 301 provides an environment suitable for the growth and metabolism of denitrifying bacteria. Through the denitrification of the anoxic zone 301, the nitrate in the sewage is effectively removed, and the organic matter is also degraded, thereby improving the water purification effect. After that, the sewage in the anoxic zone 301 flows into the aerobic zone 302 from the bottom opening 306. The microorganisms in the aerobic zone 302 can use oxygen to decompose organic matter into inorganic matter. Nitrifying bacteria can oxidize ammonia nitrogen into nitrate and absorb phosphate in the sewage and store it in the body. When these microorganisms die and decompose, the phosphate will be released, thereby achieving the effect of biological phosphorus removal. The aerator 310 accelerates the reaction in the anoxic zone 301. After the water level in the anoxic zone 301 reaches a certain position, the sewage flows into the enhanced treatment zone 303 through the perforated plate 307. The sewage flows After passing through the MBBR311 filler carrier, a biofilm is formed on the carrier. Microorganisms multiply and grow in large numbers on the biofilm while degrading organic pollutants in the sewage, thereby purifying the sewage. The water is circulated through the filler carrier by the water pump 304. The purified water can be released from the water outlet 2 by twisting the water valve 5. The sludge in the enhanced treatment area 303 can be discharged from the treatment box 1 through the setting of the sludge pump 305. The MBBR311 is placed inside the mounting frame 401. At the same time, the bottom of the MBBR311 passes through the limiting column 402. After the placement is completed, the movable block 404 is closed, and the buckle lock 403 is closed to limit the MBBR311 inside the enhanced treatment area 303 to prevent the shaking of the MBBR311 from affecting the reaction with the sewage. Through the setting of the through hole 405, when the MBBR311 needs to be taken out, the buckle lock 403 is opened and the through hole 405 is pulled up, and the through hole 405 drives the movable block 404 to open.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A decentralized domestic sewage treatment system, comprising a treatment tank (1), Features: A water outlet (2) is fixedly connected to one side of the surface of the treatment box (1), a sewage treatment mechanism (3) is provided inside the treatment box (1), a fixing mechanism (4) is provided inside the treatment box (1), and a water valve (5) is installed on one side of the surface of the water outlet (2); The sewage treatment mechanism (3) comprises an anoxic zone (301), an aerobic zone (302), an enhanced treatment zone (303), a water pump (304), a sludge pump (305), an opening (306), a perforated plate (307), a grille (308), an inclined plate (309), an aerator (310) and an MBBR (311). The anoxic zone (301) is provided inside the treatment box (1), the aerobic zone (302) is provided inside the treatment box (1), the enhanced treatment zone (303) is provided inside the treatment box (1), and one side of the surface of the treatment box (1) is provided with a A water pump (304) is installed, a mud pump (305) is installed on one side of the surface of the treatment box (1), an opening (306) is opened on one side of the inner surface of the treatment box (1), a perforated plate (307) is fixedly connected to one side of the inner surface of the treatment box (1), a grille (308) is installed on one side of the surface of the anoxic zone (301), an inclined plate (309) is installed on one side of the surface of the anoxic zone (301), an aerator (310) is installed inside the aerobic zone (302), and an MBBR (311) is installed inside the enhanced treatment zone (303).

2. A decentralized domestic sewage treatment system according to claim 1, Features: The opening (306) is opened on one side of the connection between the anoxic zone (301) and the aerobic zone (302), and the perforated plate (307) is installed on one side of the connection between the aerobic zone (302) and the enhanced treatment zone (303).

3. A decentralized domestic sewage treatment system according to claim 1, Features: The height of the inclined plate (309) is greater than the height of the enhanced treatment area (303). The inclined plate (309) is fixedly connected to one side of the surface of the grid (308) and forms an angle of thirty degrees with the grid (308).

4. A decentralized domestic sewage treatment system according to claim 1, Features: The fixing mechanism (4) comprises a mounting frame (401), a limiting column (402), a buckle lock (403), a movable block (404) and a through hole (405); the mounting frame (401) is mounted on one side of the inner surface of the processing box (1); the limiting column (402) is fixedly connected to one side of the inner surface of the mounting frame (401); the buckle lock (403) is mounted on one side of the surface of the mounting frame (401); the movable block (404) is mounted on one side of the surface of the mounting frame (401); and the through hole (405) is provided on one side of the surface of the movable block (404).

5. A decentralized domestic sewage treatment system according to claim 4, Features: The buckle locks (403) are installed on one side of the surface of the movable block (404), and two groups of the buckle locks (403) are provided.

6. A decentralized domestic sewage treatment system, such as the decentralized domestic sewage treatment system according to any one of claims 1 to 3 above, Features The method comprises the following steps: S1, collecting sewage into the anoxic zone (301), filtering the sewage through the grid (308) to remove solid impurities in the sewage and flowing down along the inclined plate (309); S2. The sewage in the anoxic zone (301) flows into the aerobic zone (302) from the bottom opening (306). The microorganisms in the aerobic zone (302) can use oxygen to decompose organic matter into inorganic matter. Nitrifying bacteria can oxidize ammonia nitrogen into nitrates and absorb phosphates in the sewage and store them in their bodies. When these microorganisms die and decompose, phosphates will be released, thereby achieving the effect of biological phosphorus removal. The aerator (310) accelerates the reaction in the anoxic zone (301); S3. When the water level in the anoxic zone (301) reaches a certain position, the sewage flows into the enhanced treatment zone (303) through the perforated plate (307). After the sewage flows through the MBBR (311) filler carrier, a biofilm is formed on the carrier. Microorganisms multiply and grow in large numbers on the biofilm while degrading organic pollutants in the sewage, thereby purifying the sewage. The water is circulated through the filler carrier by the pump (304). The purified water can be discharged from the water outlet (2) by turning the water valve (5).

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