Domestic sewage treatment system

Abstract

The utility model provides a domestic sewage treatment system which comprises a tank body, and the tank body is provided with a grating sand setting chamber, a sand filter chamber, an oil absorption chamber, a facultative chamber, an aerobic chamber and an MBR (membrane bioreactor) chamber which are communicated in sequence; the grid sand setting chamber is communicated with a domestic sewage inlet pipe, a communication port between the grid sand setting chamber and the sand filter chamber is arranged at the middle upper part of the corresponding chamber wall, a grid filter screen is arranged in the grid sand setting chamber, the grid sand setting chamber is divided into a sewage area and a filter area by the grid filter screen, and a vibrator corresponding to the grid filter screen is arranged outside the grid sand setting chamber. According to the utility model, the domestic sewage is sequentially subjected to primary filtration, secondary filtration, oil stain removal and physical and biochemical combined action to improve the decomposition of organic matters in the sewage, the organic matters are further decomposed through aerobic operation, the sewage is finally purified through the MBR chamber, and the purified water is discharged to finish the purification treatment of the domestic sewage. The sewage flows smoothly in the whole process, and the sewage treatment efficiency and effect are improved.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment, in particular to a domestic sewage treatment system. Background Art

[0002] In life, domestic sewage treatment facilities basically adopt a septic tank structure. Domestic waste is decomposed and precipitated in the septic tank, and then the sediment is sucked away by a sewage truck. The filtered sewage liquid is discharged into the regulating tank of the sewage treatment station for treatment.

[0003] However, since the filtered sewage still carries a large amount of debris or even blocky domestic garbage, it will directly enter the regulating tank for treatment, resulting in an increase in sediment in the regulating tank and a reduction in the effective operating space of the regulating tank, resulting in poor sewage treatment efficiency and effect. At the same time, since domestic sewage contains oil, it is easy to block the water outlet, resulting in poor sewage flow, which also affects the efficiency and effect of sewage treatment. Utility Model Content

[0004] In view of this, the utility model aims to provide a domestic sewage treatment system to achieve rapid and effective purification of domestic sewage.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A domestic sewage treatment system comprises a tank body, wherein the tank body is provided with a grid sand settling chamber, a sand filter chamber, an oil absorption chamber, an aerobic chamber, an aerobic chamber and an MBR chamber which are connected in sequence;

[0007] The grid sand settling chamber is connected to the domestic sewage inlet pipe, the connecting port between the grid sand settling chamber and the sand filter chamber is arranged at the middle and upper part of the corresponding chamber wall, the grid sand settling chamber is provided with a grid filter screen, the grid filter screen separates the grid sand settling chamber into a sewage area and a filter area, and the grid sand settling chamber is provided with a vibrator corresponding to the grid filter screen;

[0008] A granular medium filter layer is provided in the sand filter chamber, the granular medium filter layer is lower than the connecting port between the grid sand settling chamber and the sand filter chamber, the connecting port between the sand filter chamber and the oil suction chamber is located at the bottom of the corresponding chamber wall, and oil absorption cotton is provided in the oil suction chamber;

[0009] The oxygen-conducting chamber is provided with a stirrer;

[0010] An aeration mechanism is provided at the bottom of the aerobic chamber;

[0011] An MBR membrane frame is arranged in the MBR chamber, and a water outlet pipe of the MBR membrane frame extends out from the top of the MBR chamber.

[0012] Further, the communication port between the oil absorption chamber and the facultative aerobic chamber, the communication port between the facultative aerobic chamber and the aerobic chamber, and the communication port between the aerobic chamber and the MBR chamber are respectively located in the middle of the corresponding chamber wall.

[0013] Furthermore, the bottom of the grille filter is installed in the grille sand settling chamber through a rotating shaft, and the top of the grille filter is inclined toward the sand filter chamber and leans against a limit plate provided on the chamber wall between the grille sand settling chamber and the sand filter chamber. The grille sand settling chamber is also provided with a crossbeam corresponding to the grille filter, and the crossbeam and the limit plate are respectively provided on both sides of the grille filter.

[0014] Furthermore, the limiting plate is provided with a jack corresponding to the grille filter.

[0015] Furthermore, the granular medium filter layer is a gravel filter layer.

[0016] Furthermore, the grid sand settling chamber, aerobic chamber and MBR chamber are each independently matched with a dosing device.

[0017] Furthermore, the vibrator is a flexible shaft vibrator.

[0018] Furthermore, a mud discharge pipe is provided below the pool body, and the bottoms of the filtration area, the oil absorption chamber 9, the facultative aerobic chamber, the aerobic chamber and the MBR chamber are respectively connected to the mud discharge pipe.

[0019] Compared with the prior art, the domestic sewage treatment system described in the utility model has the following advantages:

[0020] (1) The utility model sequentially performs primary filtration, secondary filtration, oil removal, physical and biochemical combined action to improve the decomposition of organic matter in sewage, further decomposes organic matter through aerobic operation, and finally purifies sewage through the MBR chamber, and discharges the purified water to complete the domestic sewage purification treatment. The sewage flows smoothly throughout the whole process, thereby improving the efficiency and effect of sewage treatment.

[0021] (2) In the utility model, the bottom of the grille filter is rotatably installed in the grille sedimentation chamber, and the grille filter leans against the limit plate to perform sewage filtering operations. When the grille filter leans against the crossbeam in the opposite direction, the vibrator vibrates the grille filter to vibrate and remove the domestic garbage adhered to and hung on the grille filter, thereby improving the permeability of the grille filter and ensuring its filtering performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0023] Figure 1A schematic diagram of a domestic sewage treatment system according to an embodiment of the utility model;

[0024] Description of reference numerals:

[0025] 1-grid sedimentation chamber; 101-sewage area; 102-filtration area; 2-crossbeam; 3-vibrator; 4-grid filter; 5-jack; 6-sand filter chamber; 7-granular medium filter layer; 8-oil absorption cotton; 9-oil absorption chamber; 10-anaerobic chamber; 11-agitator; 12-aeration mechanism; 13-aerobic chamber; 14-MBR chamber; 15-MBR membrane frame; 16-dosing device; 18-domestic sewage inlet pipe; 19-sludge discharge pipe. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0027] like Figure 1 As shown, a domestic sewage treatment system includes a tank body, in which a plurality of partitioning chamber walls are arranged, thereby dividing the tank body into a grid sand settling chamber 1, a sand filter chamber 6, an oil absorption chamber 9, an anaerobic chamber 10, an aerobic chamber 13 and an MBR chamber which are connected in sequence. The grid sand settling chamber 1 is connected to a domestic sewage inlet pipe 18, and a connecting port between the grid sand settling chamber 1 and the sand filter chamber 6 is arranged at the middle and upper position of the corresponding chamber wall, a connecting port between the sand filter chamber 6 and the oil absorption chamber 9 is located at the bottom of the corresponding chamber wall, a connecting port between the oil absorption chamber 9 and the anaerobic chamber 10, a connecting port between the anaerobic chamber 10 and the aerobic chamber 13, and a connecting port between the aerobic chamber 13 and the MBR chamber 14 are respectively located at the middle position of the corresponding chamber wall. Sewage enters the screen sand settling chamber 1 from the domestic sewage inlet pipe 18, and then circulates in the above-mentioned sewage treatment chambers in sequence, and completes corresponding sewage treatment operations in the above-mentioned sewage treatment chambers. For example, the initial filtration is completed in the screen sand settling chamber 1, that is, the large-volume domestic garbage such as debris and blocks carried in the sewage is filtered out, and after completing the secondary filtration in the sand filter chamber 6, it enters the oil absorption chamber 9, and the oil pollution in the sewage is removed in the oil absorption chamber 9, and the decomposition of part of the organic matter is completed in the aerobic chamber 10, and the organic matter in the sewage is further decomposed in the aerobic chamber 13, and the final sewage purification is achieved in the MBR chamber, and the purified water is discharged out of the pool for standby use.

[0028] Specifically, a grid filter 4 is provided in the grid sand settling chamber 1, and the grid filter 4 divides the grid sand settling chamber 1 into a sewage area 101 and a filter area 102. The domestic sewage inlet pipe 18 is connected to the sewage area 101, and the filter area 102 is connected to the sand filter chamber 6. The domestic sewage inlet pipe 18 introduces domestic sewage into the sewage area 101. After being filtered by the grid filter 4 and blocking a large volume of domestic garbage carried in the sewage, the sewage enters the filter area 102, completing the primary filtration. After the primary filtration, the sewage enters the sand filter chamber 6 through the connecting port between the grid sand settling chamber 1 and the sand filter chamber 6, and the next sewage treatment operation is carried out.

[0029] In the utility model, the bottom of the grid filter 4 is installed on the grid sand settling chamber 1 through a rotating shaft, and its top is inclined toward the sand filter chamber 6 and leans against the limit plate 20 provided on the chamber wall between the grid sand settling chamber 1 and the sand filter chamber 6. The limit plate 20 is provided with a jack 5 corresponding to the grid filter 4. A crossbeam 2 facing the chamber wall between the grid sand settling chamber 1 and the sand filter chamber 6 is also provided in the grid sand settling chamber 1, i.e., the sewage area 101. The crossbeam 2 and the limit plate 20 are respectively provided on both sides of the grid filter 4. A vibrator 3 corresponding to the grid filter 4 is provided outside the grid sand settling chamber 1, and the vibrator 3 is a flexible shaft vibrator. In the present system, the grille filter 4 has two positions, one of which is leaning against the limit plate 20, and this position is the primary filtering position of the grille filter 4 for sewage; the other is that the jack 5 pushes the grille filter 4 to rotate outward around the rotating shaft, so that the grille filter 4 is reversely leaning against the crossbeam 2, and this position is the cleaning position of the grille filter 4. At this time, the vibrator 3 vibrates the grille filter 4 to vibrate and remove the domestic garbage adhered to and hung on the grille filter, thereby improving the permeability of the grille filter and ensuring its filtering performance.

[0030] A granular medium filter layer 7 is provided in the sand filter chamber 6, and the granular medium filter layer 7 is preferably a gravel filter layer or a quartz sand granular medium filter layer, and the granular medium filter layer 7 is lower than the connecting port between the grid sand settling chamber 1 and the sand filter chamber 6. The microbial flora formed in the granular medium filter layer 7 is used to adsorb and decompose organic pollutants in the sewage, so that the pollutants are converted into harmless substances.

[0031] The oil absorption chamber 9 is provided with oil absorption cotton 8, which adopts a cotton layer structure and covers the sewage water surface of the oil absorption chamber 9 to absorb oil in domestic sewage, effectively preventing oil from clogging the connecting port and ensuring smooth flow of sewage.

[0032] An agitator 11 is provided in the anoxic chamber 10. The stirring operation process of the agitator is a physical and chemical combined operation process. The sewage is stirred to achieve a mixing and dispersion effect. During the stirring process, organic matter in the wastewater is more likely to meet oxygen molecules in the water, so that the organic matter is more easily decomposed.

[0033] An aeration mechanism 12 is provided at the bottom of the aerobic chamber 13, and the aeration mechanism 12 provides necessary oxygen for aerobic respiration of sewage in the aerobic chamber, so as to further decompose organic matter in the sewage.

[0034] The MBR chamber 14 is provided with an MBR membrane frame 15, and the outlet pipe of the MBR membrane frame 15 extends from the top of the MBR chamber 14. After being treated in the facultative aerobic chamber and the aerobic chamber, the sewage finally enters the MBR chamber 14, and the domestic sewage is finally purified by the MBR membrane frame 15, and the purified water is discharged, completing the domestic sewage purification treatment.

[0035] In the utility model, the screen sand settling chamber 1, the aerobic chamber 13 and the MBR chamber 14 are each independently matched with a dosing device 16 to meet the dosing needs of the screen sand settling chamber 1, the aerobic chamber 13 and the MBR chamber 14 for corresponding sewage treatment operations. For example, dephosphorizing agents, nutrient agents and other drugs are added to the screen sand settling chamber 1, PAM, i.e., polyacrylamide, is added to the aerobic chamber 13 to increase the sedimentation rate of suspended matter in the sewage, and flocculants are added to the MBR chamber 14.

[0036] In the present invention, a mud discharge pipe 19 is further provided under the tank body, and the bottoms of the filtration area 102, the oil absorption chamber 9, the facultative aerobic chamber 10, the aerobic chamber 13 and the MBR chamber 14 are respectively connected to the mud discharge pipe 19. This structure facilitates the timely discharge of the sediment formed in the above chambers.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A domestic sewage treatment system, characterized in that: The invention comprises a pool body, wherein the pool body is provided with a grid sand settling chamber (1), a sand filter chamber (6), an oil absorption chamber (9), an aerobic chamber (10), an aerobic chamber (13) and an MBR chamber (14) which are connected in sequence; The grid sand settling chamber (1) is connected to a domestic sewage inlet pipe (18); a communication port between the grid sand settling chamber (1) and the sand filter chamber (6) is arranged at a middle upper position of a corresponding chamber wall; a grid filter screen (4) is arranged inside the grid sand settling chamber (1); the grid filter screen (4) divides the grid sand settling chamber (1) into a sewage area (101) and a filter area (102); and a vibrator (3) corresponding to the grid filter screen (4) is arranged outside the grid sand settling chamber (1); A granular medium filter layer (7) is provided in the sand filter chamber (6), the granular medium filter layer (7) is lower than the communication port between the grid sand settling chamber (1) and the sand filter chamber (6), the communication port between the sand filter chamber (6) and the oil suction chamber (9) is located at the bottom of the corresponding chamber wall, and the oil suction chamber (9) is provided with oil absorption cotton (8); The oxygen-conducting chamber (10) is provided with a stirrer (11); An aeration mechanism (12) is provided at the bottom of the aerobic chamber (13); An MBR membrane frame (15) is arranged in the MBR chamber (14), and a water outlet pipe of the MBR membrane frame (15) extends out from the top of the MBR chamber (14).

2. A domestic sewage treatment system according to claim 1, characterized in that: The communication port between the oil absorption chamber (9) and the anoxic chamber (10), the communication port between the anoxic chamber (10) and the aerobic chamber (13), and the communication port between the aerobic chamber (13) and the MBR chamber (14) are each located in the middle of the corresponding chamber wall.

3. A domestic sewage treatment system according to claim 1, characterized in that: The bottom of the grid filter (4) is installed on the grid sand settling chamber (1) through a rotating shaft, and the top of the grid filter (4) is inclined toward the sand filter chamber (6) and leans against a limit plate (20) provided on the chamber wall between the grid sand settling chamber (1) and the sand filter chamber (6). The grid sand settling chamber (1) is also provided with a crossbeam (2) corresponding to the grid filter (4), and the crossbeam (2) and the limit plate (20) are respectively provided on both sides of the grid filter (4).

4. A domestic sewage treatment system according to claim 3, characterized in that: The limiting plate (20) is provided with a jack (5) corresponding to the grille filter (4).

5. A domestic sewage treatment system according to claim 1, characterized in that: The granular medium filter layer (7) is a gravel filter layer.

6. A domestic sewage treatment system according to claim 1, characterized in that: The grid sand settling chamber (1), the aerobic chamber (13) and the MBR chamber (14) are each independently matched with a dosing device (16).

7. A domestic sewage treatment system according to claim 1, characterized in that: The vibrator (3) is a flexible shaft vibrator.

8. A domestic sewage treatment system according to claim 1, characterized in that: A mud discharge pipe (19) is also provided below the pool body, and the bottoms of the filtering area (102), the oil absorption chamber (9), the facultative aerobic chamber (10), the aerobic chamber (13) and the MBR chamber (14) are respectively connected to the mud discharge pipe (19).

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