Rural domestic sewage treatment device

A domestic sewage and treatment device technology, applied in biological water/sewage treatment, water/sewage treatment, biological sludge treatment, etc., can solve problems such as environmental pollution of the surrounding water, achieve extended hydraulic retention time, low mud suction work, Compact and reasonable effect

Pending Publication Date: 2020-11-06
WUXI CITY COLLEGE OF VOCATIONAL TECH
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AI-Extracted Technical Summary

Problems solved by technology

The domestic sewage of individual rural residences is even directly discharged into th...
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Method used

Septic unit 2 connects adjustment unit 4 by air-lift pump outlet pipe 10b, the top of septic unit 2 is provided with water inlet pipe 1, is provided with air-lift pump 3 in septic unit 2, in one embodiment, gas The lift pump 3 is installed on the right side of the septic unit 2, and the air lift pump 3 is provided with an air injection pipe 13b connected to the water outlet pipe 10b of the air lift pump. As shown in Figure 2, the air lift pump 3 sends the septic tank sewage through the air lift pump outlet pipe 10b to the adjustment unit 4 after spraying air through the air injection pipe 13b; 10b Connect the collection device, start the air lift pump 3 to empty the septic unit 2 for maintenance and inspection work. When the mud suction work starts, connect the outlet pipe 10b of the air lift pump to the collection device, put in tap water to dilute and stir, and start the air lift pump 3 to empty the sludge in the septic unit 2, which can solve the problem of no professional mud suction truck or mud suction in rural areas. Difficulties with cars not being able to enter the arena. The air lift pump 3 connects the first aeration ring pipe 13 and the second aeration ring pipe 13a through the aeration pipe 15, and the air is transported by the air lift pump 3 to the first aeration ring pipe 13 and the second aeration ring pipe 13 through the aeration pipe 15. G...
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Abstract

The invention belongs to the technical field of sewage treatment, and discloses a rural domestic sewage treatment device, which comprises an upper pool body and a lower pool body. The lower pool bodycomprises a septic unit, and a sewage treatment unit and an adjusting unit which are arranged around the septic unit; the sewage treatment unit comprises a first anoxic unit, a first aerobic unit, a second anoxic unit, a second aerobic unit and a precipitation unit which are sequentially communicated, and a water collecting tank connected with a water outlet pipe is arranged at the top of the precipitation unit; a water inlet pipe is arranged on the septic unit, an airlift pump and an airlift pump water outlet pipe are arranged in the septic unit, a gas ejector pipe is arranged on the airliftpump, the airlift pump is connected with aeration ring pipes in the two aerobic units through aeration pipelines, and the precipitation unit and the two aerobic units are communicated with the two anoxic units through a sludge return pipeline by utilizing the airlift pump. The sewage treatment device is compact and reasonable in structure, good in treatment effect, low in mud suction work and energy-saving, treated discharge water can be used for irrigation, the problems that rural domestic sewage is dispersed and is not convenient to treat are solved, and waste can be turned into wealth.

Application Domain

Water contaminantsMultistage water/sewage treatment +4

Technology Topic

Sewage treatmentSewage +5

Image

  • Rural domestic sewage treatment device
  • Rural domestic sewage treatment device
  • Rural domestic sewage treatment device

Examples

  • Experimental program(1)

Example Embodiment

[0022] The present invention will be further described below with reference to specific embodiments and accompanying drawings.
[0023] As shown in the figure: The rural domestic sewage treatment device includes an upper tank body 12 and a lower tank body 11, wherein the lower tank body 11 includes a septic unit 2 arranged in the middle and a sewage treatment unit arranged around the septic unit 2. unit 4. The sewage treatment unit includes a first anoxic unit 5, a first aerobic unit 6, a second anoxic unit 5a, a second aerobic unit 6a and a precipitation unit 7 connected in sequence, and the first anoxic unit 5 is communicated through the adjustment unit 4 In the septic unit 2, the first aerobic unit 6 is provided with a first aeration loop 13, the second aerobic unit 6a is provided with a second aeration loop 13a, and the top of the sedimentation unit 7 is provided with a water collection tank 10, The water collecting tank 10 is connected to the water outlet pipe 10a. The sewage circulates in the process of treatment, which greatly reduces the floor area of ​​the entire facility and prolongs the hydraulic retention time, thereby improving the treatment effect of rural domestic sewage.
[0024] The septic unit 2 is connected to the adjustment unit 4 through the air-lift pump water outlet pipe 10b, a water inlet pipe 1 is arranged above the septic unit 2, and an air-lift pump 3 is arranged in the septic unit 2. In one embodiment, the air-lift pump 3 Installed on the right side of the septic unit 2, the air lift pump 3 is provided with a jet pipe 13b connected to the water outlet pipe 10b of the air lift pump. like figure 2 As shown, the air lift pump 3 sends the septic tank sewage from the air lift pump water outlet pipe 10b into the adjustment unit 4 after jetting through the air jet pipe 13b; when the septic unit 2 is faulty and repaired, the air lift pump water outlet pipe 10b can be connected to collect device, start the air lift pump 3 to empty the septic unit 2 to carry out maintenance work. When the mud suction work starts, connect the water outlet pipe 10b of the air lift pump to the collecting device, put it into tap water to dilute and stir, and start the air lift pump 3 to empty the sludge in the septic unit 2, which can solve the problem that there is no professional mud suction truck or mud suction in rural areas. The difficulty of the car not being able to enter the field. The air lift pump 3 is connected to the first aeration ring pipe 13 and the second aeration ring pipe 13a through the aeration pipe 15, and the air is transported by the air lift pump 3 to the first aeration ring pipe 13 and the second aeration ring pipe 13 through the aeration pipe 15. Gas ring tube 13a. The precipitation unit 7, the first aerobic unit 6 and the second aerobic unit 6a are connected to the first anoxic unit 5 and the second anoxic unit 5a by the air lift pump 3 through the mud return pipeline 17, so as to connect the aerobic unit with the precipitation unit The sludge is returned to the anoxic unit to supplement the sludge concentration. The whole device uses the air lift pump to play five functions of sewage lifting, returning sludge, aeration, sewage maintenance, and self-priming mud, avoiding the use of water pumps. To 1 kWh of electricity, the operating cost is low, the service life of the air lift pump is long, the structure is simple, and the maintenance is convenient. It is especially suitable for the operation mode of rural decentralized sewage treatment without professional supervision.
[0025] Specifically, the upper tank body 12 is provided with a manhole cover, which can be opened for cleaning, mud suction and maintenance. The lower pool body 11 is oval. The first aeration loop pipe 13 and the second aeration loop pipe 13a are provided with holes at a certain interval, so as to supply oxygen to the two aerobic units. The air jet pipe 13b can extend from the bottom side wall of the water outlet pipe 10b of the air lift pump on the side of the septic unit 2 and be fixed inside the water outlet pipe 10b of the air lift pump by a clamp.
[0026] The aeration pipe 15 between the air lift pump 3 and the first aeration ring pipe 13 and the second aeration ring pipe 13a is provided with a first regulating valve 16 for adjusting the aeration amount. A second regulating valve is provided on the sludge return pipeline 17 between the sedimentation unit 7, the first aerobic unit 6, the second aerobic unit 6a, the first anoxic unit 5, the second anoxic unit 5a and the air lift pump 3 16a, used to adjust the amount of mud returned.
[0027] The precipitation unit 7 is provided with a hanging basket 8 and a stuffing bucket 9. The hanging basket 8 and the stuffing bucket 9 are provided with phosphorus removal fillers to ensure the phosphorus removal effect of the whole device. The bottom of the hanging basket 8 is provided with a water inlet. The upper edge of the stuffing bucket 9 is lower than the upper edge of the sump 10 so as to prevent sludge loss. Phosphorus removal fillers can use waste brick particles and lime particles.
[0028] Working process: The rural domestic sewage flows out from the household pipe and then enters the water inlet pipe 1. After flowing in from the water inlet pipe 1, it first enters the septic unit 2. The septic unit mainly plays the role of precipitating large particulate matter in the sewage and preliminarily degrading organic matter; After the sedimentation and anaerobic treatment of the septic unit, the septic tank sewage is lifted by the air lift pump 3 through the jet pipe 13b, and then the septic tank sewage is lifted from the air lift pump water outlet pipe 10b into the adjustment unit 4. Buffer the domestic sewage treatment load, prevent the rapid change of the treatment system load, and reduce the fluctuation of the sewage flow into the treatment system; then the sewage enters the first anoxic unit 5 for treatment, and the first anoxic unit 5 mainly degrades and degrades the organic matter of the sewage. Denitrification treatment; then the sewage enters the first aerobic unit 6, the first aerobic unit 6 mainly serves to degrade organic matter and carry out nitrification reaction to generate nitrate and nitrite; then the sewage enters the second anoxic unit 5a, and the second The oxygen unit 5a plays the same role as the first anoxic unit 5; the sewage then enters the second aerobic unit 6a, and the second aerobic unit 6a plays the same role as the first aerobic unit 6, and both are pumped by the air lift pump 3 through aeration. The gas pipeline 15 is transported to the first aerobic unit 6 and the second aerobic unit 6a, and the first aeration loop 13 and the second aeration loop 13a realize oxygen supply in the two units, and the oxygen supply amount is adjusted by the first The valve 16 is adjusted; the first aerobic unit 6 and the second aerobic unit 6a return the sludge to the first anoxic unit 5 and the second anoxic unit 5a through the air lift pump 3 and the sludge return pipeline 17 respectively. On the one hand, the backflow denitrifies and denitrifies nitrate and nitrite, and on the other hand, the sludge concentration is supplemented to ensure the microbial biomass required for sewage degradation. The sludge return flow is adjusted by the second regulating valve 16a; The water inlet 14 enters from the bottom of the precipitation unit 7. The precipitation unit 7 is provided with a hanging basket 8 and a filling bucket 9. In the hanging basket 8 and the filling bucket 9, waste brick particles and lime particles can be placed for phosphorus removal. The basket 8 and the stuffing in the stuffing bucket 9 are replaced, and the treated water enters the water collecting tank 10 through the overflow, and is finally discharged from the water outlet pipe 10a. The device has compact and reasonable structure, saves energy and can realize the reuse of treated water.

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Description & Claims & Application Information

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