Rural domestic sewage treatment device

Abstract

The utility model discloses a rural domestic sewage treatment device belongs to sewage treatment technical field, including the treatment box, the inside of treatment box is provided with fixed assembly, the outside wall of treatment box is provided with aeration assembly, the inside of treatment box is provided with water inlet area, first reaction area, second reaction area, third reaction area, fourth reaction area and water outlet area. The rural domestic sewage treatment device, through the water inlet area, first reaction area, second reaction area, third reaction area, fourth reaction area and water outlet area of treatment box inside setting, the inside of first reaction area, second reaction area, third reaction area and fourth reaction area is provided with elastic filler, and the mud and water are separated with the mode of filter material filtration, and the water quality of effluent is more clear and the construction of secondary sedimentation tank is reduced, and the two ends of water inlet area and water outlet area are alternately water inlet, effectively alleviate the blockage condition of filter material both sides, and the oxygen, oxygen condition of alternately changing reaction tank is saved sludge reflux.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically, it relates to a rural domestic wastewater treatment device. Background Technology

[0002] Rural domestic sewage treatment is an important part of rural revitalization and a crucial component of rural living environment improvement. When villages have a large population and high density of residents and cannot be connected to urban sewage treatment plants, newly built centralized sewage treatment stations are generally used for sewage treatment. Most existing centralized sewage treatment plants use integrated sewage treatment equipment made with activated sludge process. However, in actual operation, because most rural domestic sewage collection pipelines do not completely separate rainwater and sewage, the actual influent pollutant concentration is low, which is difficult to continuously meet the normal metabolic needs of activated sludge in integrated sewage treatment equipment. This results in low activated sludge concentration in the treatment system, poor resistance to shock load, and difficulty in ensuring stable operation of sewage treatment equipment and compliance of effluent quality. To address the aforementioned problems, this application proposes a rural domestic sewage treatment device. Utility Model Content

[0003] In view of the problems in the related technologies, this utility model proposes a rural domestic sewage treatment device to overcome the above-mentioned technical problems existing in the existing related technologies.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A rural domestic sewage treatment device includes a treatment tank, with a fixing component inside the treatment tank and an aeration component on the outer wall of the treatment tank. The treatment tank is further divided into an inlet zone, a first reaction zone, a second reaction zone, a third reaction zone, a fourth reaction zone, and an outlet zone. Elastic packing material is installed inside the first, second, third, and fourth reaction zones.

[0005] Preferably, the fixing component includes a filter frame fixed to the inner side wall of the treatment tank, the filter frame is provided with lightweight filter media inside, an inclined plate is fixedly connected to the side of the filter frame near the water inlet area, the bottom of the inclined plate is fixedly connected to the bottom of the treatment tank, and filter holes are opened on the outer side wall of the filter frame.

[0006] Preferably, a drain pipe is fixedly connected to the outer wall of the treatment box, a water inlet pipe is provided on the outer wall of the treatment box, and a partition plate is provided at the adjacent positions of the first reaction zone, the second reaction zone, the third reaction zone and the fourth reaction zone.

[0007] Preferably, a guide plate is fixedly connected to the bottom center of the treatment tank, the bottom of the partition plate between the partition plate and the filter hole is fixedly connected to the guide plate, and a booster pump is provided at the end of the water inlet pipe away from the treatment tank.

[0008] Preferably, the bottom of the treatment tank is provided with a sludge discharge pipe, the outer wall of the sludge discharge pipe is provided with a collecting pipe, and the top of the collecting pipe is connected to the water inlet zone, the first reaction zone, the fourth reaction zone and the water outlet zone respectively.

[0009] Preferably, the aeration assembly of the treatment box includes a blower, an air supply pipe is connected to the outer side wall of the blower, a diversion pipe is connected to the outer side wall of the air supply pipe, and an aeration pipe is connected to the bottom of the diversion pipe.

[0010] In summary, the technical effects and advantages of this utility model are as follows: This rural domestic sewage treatment device, through the inlet zone, first reaction zone, second reaction zone, third reaction zone, fourth reaction zone and effluent zone set inside the treatment tank, with elastic packing material installed inside the first reaction zone, second reaction zone, third reaction zone and fourth reaction zone, uses filter media filtration to separate mud and water, resulting in clearer effluent and reducing the construction of a secondary sedimentation tank. The alternating water intake at both ends of the inlet and effluent zones effectively alleviates the clogging of both sides of the filter media, and at the same time alternates between the anoxic and aerobic states of the reaction tank, eliminating the need for sludge recirculation. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the filter frame and related structures of this utility model; Figure 3 This is a schematic diagram of the sludge discharge pipe and its related structures of this utility model; Figure 4 This is a schematic diagram of the aeration component and related structures of this utility model.

[0012] In the diagram: 1. Treatment tank; 101. Inlet zone; 102. First reaction zone; 103. Second reaction zone; 104. Third reaction zone; 105. Fourth reaction zone; 106. Outlet zone; 2. Fixed components; 201. Filter frame; 202. Inclined plate; 203. Divider plate; 204. Filter holes; 205. Drain pipe; 206. Inlet pipe; 207. Lift pump; 208. Guide plate; 3. Sludge discharge pipe; 4. Aeration components; 401. Blower; 402. Air supply pipe; 403. Diversion pipe; 404. Aeration pipe. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Reference Figure 1-4 A rural domestic sewage treatment device includes a treatment tank 1. A fixing assembly 2 is installed inside the treatment tank 1, and an aeration assembly 4 is installed on the outer wall of the treatment tank 1. The treatment tank 1 is internally configured with an inlet zone 101, a first reaction zone 102, a second reaction zone 103, a third reaction zone 104, a fourth reaction zone 105, and an outlet zone 106. Elastic packing material is installed inside the first reaction zone 102, second reaction zone 103, third reaction zone 104, fourth reaction zone 105, and outlet zone 106 from left to right. As the operating time increases, the packing material in the subsequent reaction zones will accumulate large amounts of adhesive. A large amount of activated sludge is added. At this point, the wastewater in the first reaction zone 102 is in an aerobic state. Under the action of aerobic microorganisms, the organic matter and ammonia nitrogen in the wastewater undergo large-scale carbonization and nitrification, converting the organic matter and ammonia nitrogen in the wastewater into carbon dioxide and nitrate nitrogen. After that, the wastewater enters the second reaction zone 103. At this point, the dissolved oxygen in the wastewater is almost exhausted, and it is in an anaerobic state. The nitrate nitrogen and the remaining organic matter in the wastewater undergo denitrification under the action of facultative anaerobic microorganisms, generating dinitrate which is discharged. After that, when the wastewater enters the third reaction zone 104, the wastewater is in an anaerobic state. The polyphosphate-accumulating bacteria in the sludge complete the release of phosphorus under anaerobic conditions. As the wastewater enters the fourth reaction zone 105, under the aeration of the perforated pipes in the fourth reaction zone 105, the dissolved oxygen in the wastewater increases and it becomes an aerobic state. The polyphosphate-accumulating bacteria reabsorb a large amount of phosphorus in the wastewater, which is then discharged with the sludge, thus effectively and thoroughly treating the wastewater.

[0015] Reference Figure 2 The fixing component 2 includes a filter frame 201 fixed to the inner wall of the treatment tank 1. The filter frame 201 is filled with lightweight filter media. An inclined plate 202 is fixedly connected to the side of the filter frame 201 near the water inlet zone 101. The bottom of the inclined plate 202 is fixedly connected to the bottom of the treatment tank 1. Filter holes 204 are opened on the outer wall of the filter frame 201. By filling the filter frame 201 with lightweight filter media and connecting the inclined plate 202 to the bottom of the filter frame 201 and the water inlet zone 101, after the sewage enters the interior of the water inlet zone 101, it passes between the inclined plates 202 and enters the interior of the filter frame 201 through the filter holes 204 opened on the outer wall of the filter frame 201. Impurities in the sewage fall onto the surface of the inclined plate 202 under the action of gravity, thereby initially filtering the impurities.

[0016] Reference Figure 2 A drain pipe 205 is fixedly connected to the outer wall of the treatment tank 1, and an inlet pipe 206 is provided on the outer wall of the treatment tank 1. A partition plate 203 is provided at the adjacent positions of the first reaction zone 102, the second reaction zone 103, the third reaction zone 104, and the fourth reaction zone 105. By providing a partition plate 203 between the first reaction zone 102, the second reaction zone 103, the third reaction zone 104, and the fourth reaction zone 105, and by providing a partition plate 203 between the first reaction zone 102 and the second reaction zone 103 with its top fixedly connected to the treatment tank 1 and its bottom forming a flow port, sewage can flow inside the first reaction zone 102, the second reaction zone 103, the third reaction zone 104, and the fourth reaction zone 105, allowing the sewage to fully pass through the elastic packing material provided inside the first reaction zone 102, the second reaction zone 103, the third reaction zone 104, and the fourth reaction zone 105.

[0017] Reference Figure 2 A guide plate 208 is fixedly connected to the center of the bottom of the treatment tank 1. The bottom of the partition plate 203, which is set between the partition plate 203 and the filter hole 204, is fixedly connected to the guide plate 208. A lift pump 207 is set at the end of the water inlet pipe 206 away from the treatment tank 1. Through the guide plate 208 set at the center of the bottom of the treatment tank 1, the sludge and residue filtered from the sewage in the first reaction zone 102, the second reaction zone 103, the third reaction zone 104 and the fourth reaction zone 105 fall to the bottom of the guide plate 208 and slide down the inclined surface of the guide plate 208, so that the sludge can be collected.

[0018] Reference Figure 3 The bottom of the treatment tank 1 is equipped with a sludge discharge pipe 3, and the outer wall of the sludge discharge pipe 3 is equipped with a collecting pipe. The top of the collecting pipe is connected to the inlet zone 101, the first reaction zone 102, the fourth reaction zone 105 and the outlet zone 106 respectively. The sludge filtered inside the treatment tank 1 is discharged through the sludge discharge pipe 3 at the bottom of the treatment tank 1. Valves are installed on the pipes connecting the inlet zone 101, the first reaction zone 102, the fourth reaction zone 105 and the outlet zone 106 to the sludge discharge pipe 3, so that the flow of the sludge discharge pipe 3 can be controlled.

[0019] Reference Figure 1 and Figure 4The aeration assembly 4 of the treatment tank 1 includes a blower 401. An air supply pipe 402 is connected to the outer wall of the blower 401. A diversion pipe 403 is connected to the outer wall of the air supply pipe 402. An aeration pipe 404 is connected to the bottom of the diversion pipe 403. The blower 401 delivers gas into the air supply pipe 402. Under the delivery of the diversion pipe 403 and the aeration pipe 404, the gas enters the filter frame 201, the first reaction zone 102 and the fourth reaction zone 105, thereby effectively aerating the sewage inside and creating an aerobic environment for sewage treatment.

[0020] Working Principle: Wastewater is lifted by the equalization tank lift pump 207 and then transported into the inlet zone 101 via the inlet pipe 206. The wastewater then enters the filter frame 201 through the gaps between the inclined plates 202. Impurities in the wastewater fall onto the surface of the inclined plates 202 under gravity. Meanwhile, the aeration pipes 404 inside the filter frame 201 continuously aerate the water, increasing dissolved oxygen. The generated bubbles cause the lightweight filter media inside the filter frame 201 to float, increasing the gaps between the media. After passing through the filter frame 201, the wastewater enters the first reaction zone 102. Inside the first reaction zone 102, under the action of the aeration pipes 404, the wastewater is in an aerobic state. Organic matter and ammonia nitrogen in the wastewater undergo large-scale carbonization and nitrification under the action of aerobic microorganisms, converting organic matter and ammonia nitrogen into carbon dioxide and nitrate nitrogen. The wastewater flows into the second reaction zone 103, where the dissolved oxygen is almost completely depleted, creating an anoxic state. The nitrate nitrogen and remaining organic matter in the wastewater are then further aerated by facultative anaerobic microorganisms. Denitrification occurs, producing dinitrate which is then discharged. When the wastewater enters the third reaction zone 104, it is in an anaerobic state. Polyphosphate-accumulating bacteria in the sludge release phosphorus under anaerobic conditions. As the wastewater enters the fourth reaction zone 105, the dissolved oxygen level rises under the aeration of the aeration pipes 404, creating an aerobic environment. Polyphosphate-accumulating bacteria reabsorb a large amount of phosphorus from the wastewater, which is then discharged with the sludge. The remaining organic matter in the wastewater is consumed through assimilation or dissimilation by the aerobic bacteria. Subsequently, the wastewater... As the aeration pipe 404 inside the filter frame 201 is not aerated, the filter media deposits and the voids decrease. The aged biofilm sludge is trapped in the fourth reaction zone 105 by the deposited filter media. The sewage enters the effluent zone 106, and then is discharged through the gap of the inclined plate 202. Finally, it is discharged through the drain pipe 205. When the filter frame 201 between the fourth reaction zone 105 and the effluent zone 106 is blocked, a valve is installed on the outer wall of the inlet pipe 206 to control the flow direction of the sewage and make the sewage flow in reverse.

[0021] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rural domestic sewage treatment device, comprising a treatment tank (1), characterized in that, The treatment tank (1) is equipped with a fixing component (2) inside, and an aeration component (4) is provided on the outer wall of the treatment tank (1). The treatment tank (1) is equipped with an inlet zone (101), a first reaction zone (102), a second reaction zone (103), a third reaction zone (104), a fourth reaction zone (105) and an outlet zone (106) inside. The first reaction zone (102), the second reaction zone (103), the third reaction zone (104) and the fourth reaction zone (105) are equipped with elastic packing.

2. The rural domestic sewage treatment device according to claim 1, characterized in that, The fixing component (2) includes a filter frame (201) fixed to the inner wall of the treatment tank (1). The filter frame (201) is provided with lightweight filter media. An inclined plate (202) is fixedly connected to the side of the filter frame (201) near the water inlet area (101). The bottom of the inclined plate (202) is fixedly connected to the bottom of the treatment tank (1). Filter holes (204) are opened on the outer wall of the filter frame (201).

3. A rural domestic sewage treatment device according to claim 1, characterized in that, The outer wall of the treatment box (1) is fixedly connected to a drain pipe (205), and the outer wall of the treatment box (1) is provided with a water inlet pipe (206). A partition plate (203) is provided at the adjacent positions of the first reaction zone (102), the second reaction zone (103), the third reaction zone (104) and the fourth reaction zone (105).

4. A rural domestic sewage treatment device according to claim 3, characterized in that, A guide plate (208) is fixedly connected to the bottom center of the treatment tank (1). The bottom of the partition plate (203) between the partition plate (203) and the filter hole (204) is fixedly connected to the guide plate (208). A booster pump (207) is provided at the end of the water inlet pipe (206) away from the treatment tank (1).

5. A rural domestic sewage treatment device according to claim 1, characterized in that, The bottom of the treatment tank (1) is provided with a sludge discharge pipe (3), and the outer wall of the sludge discharge pipe (3) is provided with a collection pipe. The top of the collection pipe is connected to the water inlet zone (101), the first reaction zone (102), the fourth reaction zone (105) and the water outlet zone (106) respectively.

6. A rural domestic sewage treatment device according to claim 1, characterized in that, The aeration assembly (4) of the treatment box (1) includes a blower (401), an air supply pipe (402) is connected to the outer wall of the blower (401), a diversion pipe (403) is connected to the outer wall of the air supply pipe (402), and an aeration pipe (404) is connected to the bottom of the diversion pipe (403).

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