CN102976564A - Continuous rural domestic waste water treating device - Google Patents

Abstract

The invention discloses a continuous treatment device for domestic sewage and waste water in rural areas. An anaerobic zone, a facultative oxygen zone, an aerobic zone and a biological filtration zone are separated inside a rectangular shell. There are biological fillers, and the biofiltration area is filled with activated carbon; the first buoy is placed on the liquid surface in the aerobic area, and one end of the first pump is connected to the middle and lower part of the aerobic area, and the other end extends from the top of the aerobic area to the aerobic area. Between the shell wall of the shell and the shell wall of the biofiltration area, the pipeline end extending between the two shell walls contains a Venturi tube, the opening of the Venturi tube faces downward, and a baffle is provided at the bottom of the opening , the lower part of the baffle is provided with a deflector, and the deflector is placed on the second floating ball floating on the liquid surface of the aerobic zone; the second buoy is also floating on the liquid surface of the aerobic zone; the aerobic zone and the biological filtration zone There is a second pump between them; the present invention integrates anaerobic, facultative, aerobic, and biological filtration chambers, and has a small footprint, high treatment rate, and high degree of automation.

Description

A continuous treatment device for domestic sewage and wastewater in rural areas

technical field

The invention relates to a waste water treatment device, in particular to a device for continuous treatment of rural domestic sewage and waste water.

Background technique

At present, most of the domestic sewage in rural areas of our country is directly discharged, causing pollution of rivers and ponds, which not only affects the living environment of villagers, but also seriously threatens the health of farmers. At present, there are many problems in rural areas such as weak infrastructure construction, inadequate drainage system and sewage treatment construction. At present, there are two main processes for rural sewage treatment, one is the membrane bioreactor (MBR) process, and the other is the constructed wetland process. Membrane bioreactor is a combination of membrane separation technology and activated sludge biotechnology. Its efficient solid-liquid separation makes the effluent water quality good, suspended solids and turbidity close to zero, and domestic sewage can be directly reused after treatment. Sewage is first anaerobically digested in a septic tank to reduce the load of organic matter. But there are also many shortcomings, mainly reflected in the relatively high price of the membrane, and the problem of membrane pollution has not been completely solved, such as physical blockage, chemical structure and biological pollution, resulting in short replacement cycle and poor operation and maintenance. The cost is high, and the biochemical function of MBR has not changed the biochemical essence. The constructed wetland process is that after the rural domestic sewage is treated in a septic tank, the supernatant enters the water inlet well through the water collection pipe, flows into the sedimentation tank through the grid, and the settled supernatant is pumped into the first-level constructed wetland with a pump, and then enters the Second-level constructed wetland, the effluent of the second-level constructed wetland returns to the clear water pond, which can be used for greening, irrigation, and can also overflow to nearby ponds, but this process requires large land and corresponding temperature. For example, in winter, the Technology has great limitations in use.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a continuous treatment device for rural domestic sewage and wastewater. The device requires less energy consumption, low cost, high degree of automation, no manual operation and no pollution during operation.

The technical solution adopted in the present invention is: it includes a rectangular shell, which is divided into four parts: anaerobic zone, facultative zone, aerobic zone, and biological filtration zone. L type, extending from the bottom of the anaerobic zone and the facultative zone to the side of the facultative zone, the upper part of the aerobic zone is a biological filtration zone, the aerobic zone is suspended with biological fillers, and the biological filter zone is filled with activated carbon; The anaerobic zone and the anaerobic zone are connected by an outlet pipeline, and the first buoy is placed on the liquid surface in the anaerobic zone, and the first buoy is connected to the automatic switch through the first lever; one end of the first pump is connected to the anaerobic zone through a pipeline The middle and lower part, the other end extends from the top of the aerobic zone through the pipeline between the shell wall of the aerobic zone and the shell wall of the biofiltration zone, and the pipeline stretched between the two shell walls One end contains a Venturi tube and an air tube connected to the narrowest area of the Venturi tube. The lower part is provided with a deflector whose height is lower than the bottom of the biological filtration zone. One end of the deflector is movably connected to the inner wall of the shell of the aerobic zone, and the other end is placed on the second floating ball floating on the liquid surface of the aerobic zone; the aerobic zone There is also a second buoy floating on the liquid surface of the zone, and the second buoy is connected to the automatic delay switch through the second lever; a second pump is set between the aerobic zone and the biofiltration zone, and the outlet pipe of the second pump extends in the biofiltration zone. top of the area.

The beneficial effects of the present invention are:

1. The equipment of the present invention is a sewage treatment device integrating anaerobic, facultative oxygen, aerobic, and biological filtration chambers. The equipment occupies a small area, has a high treatment rate, small investment in the treatment process, simple operation, low cost, and high degree of automation .

2. No aeration device is needed in the aerobic zone, reducing the cost of sewage treatment.

3. All processes are fully automatic control, with liquid level control pump switch, without manual operation. the

Description of drawings

Fig. 1 is a structural representation of the present invention;

In the figure: Ⅰ. Anaerobic zone; Ⅱ. Facultative oxygen zone; Ⅲ. Aerobic zone; Ⅳ. Biological filtration zone;

1. Shell; 2. Inlet pipe; 3. Outlet pipe; 4. Mud outlet; 5. Buoy; 6. Automatic switch; 7. Lever; 8. Pump; 9. Pipeline; 10. Venturi tube; 11. Air pipe; 12. Baffle; 13. Deflector; 14. Float; 15. Biological filler; 16. Buoy; 17. Automatic delay switch; 18. Lever; 21. Activated carbon; 22. Export.

Detailed ways

As shown in Figure 1, the processing equipment includes a rectangular shell 1, which is divided into four parts by a partition wall, which are anaerobic zone I, facultative zone II, aerobic zone III, and biological filtration zone IV. In these four parts, the sewage enters the anaerobic zone I from the top of the anaerobic zone I through the water inlet pipe 2. The anaerobic zone I has a cover and is in a semi-closed state. The anaerobic zone I occupies the largest volume among the four zones. , the residence time of wastewater is the longest, the next door of anaerobic zone I is facultative zone II, anaerobic zone I and facultative zone II are separated by a partition wall, aerobic zone III is L-shaped, from anaerobic zone I and facultative zone II The bottom of facultative zone II extends to the side of facultative zone II, and the upper part of aerobic zone III is separated into a biological filtration zone IV.

Anaerobic zone I and facultative zone II are connected by outlet pipe 3, and outlet pipe 3 is located in the middle and lower part of the partition wall between anaerobic zone I and facultative zone II, which is beneficial for sludge to settle in anaerobic zone I instead of flowing to the anaerobic zone In the aerobic zone II, wastewater can automatically flow from the anaerobic zone I to the facultative zone II. There is a sludge outlet 4 in the anaerobic zone I, and the sludge can be discharged from the sludge outlet 4. A buoy 5 is placed on the liquid surface in the aerobic zone II, and the buoy 5 is connected to the automatic switch 6 through the lever 7. When the water level reaches a certain height, the buoy 5 drives the lever 7 to switch on the automatic switch 6.

A pump 8 is set between the facultative zone II and the aerobic zone III, one end of the pump 8 is connected to the middle and lower part of the facultative zone II through the pipeline 9, and the other end is connected to the top of the aerobic zone III through the pipeline 9. The pipeline 9 located in the aerobic zone III extends between the shell wall of the aerobic zone III and the shell wall of the biofiltration zone IV, and the end of the pipeline 9 located in the aerobic zone III contains a Venturi tube 10 and an air pipe 11 connected to the Venturi tube 10, one end of the air pipe 11 is connected to the narrowest area of the Venturi pipe 10, and the other end of the air pipe 11 extends out of the housing 1, and is lower than the upper end of the housing 1 slightly higher. The opening of the venturi tube 10 faces downward, and a baffle plate 12 is provided directly under the venturi tube 10 , and a deflector 13 is provided directly under the baffle plate 12 . The height of the baffle plate 12 is equivalent to the height of the bottom of the biological filtration zone IV, the height of the deflector 13 is lower than the bottom of the biological filtration zone IV, the baffle plate 12 can be fixed on the inner wall of the shell of the aerobic zone III, the deflector plate 13 One end is movably connected to the inner wall of the shell of the aerobic zone III, and the other end of the deflector 13 is placed on the floating ball 14, and the floating ball 14 floats on the liquid surface of the aerobic zone III. A buoy 16 is also floating on the liquid surface of the aerobic zone III, and the buoy 16 is connected to an automatic time-delay switch 17 through a lever 18. The liquid level of the aerobic zone III is controlled by the buoy 16 connected to the automatic time-delay switch 17. When the water level reaches a certain height, The buoy 16 drives the lever 18 to connect the automatic delay switch 17. The biological filler 15 is suspended in the aerobic zone III for the attachment and growth of microorganisms. A pump 19 is set between the aerobic zone III and the biological filtration zone IV, and the water inlet pipe 20 of the pump 19 extends to the innermost end of the aerobic zone III, so as to avoid dead ends in the aerobic zone and also avoid the aerobic reaction zone The water flow is short-circuited, increasing the flow of water flow. The outlet pipe 20 of the pump 19 extends at the top of the biological filtration zone IV. Activated carbon 21 is filled in the biological filtration zone IV, and microorganisms grow on the surface of the activated carbon 21 .

When the sewage enters the anaerobic zone Ⅰ from the water inlet pipe 2, the pump 8 is started, and the water is discharged to the aerobic zone Ⅲ through the pipeline 9. When the pump 8 pumps the water into the aerobic zone Ⅲ, an Negative pressure brings air into the water through the air pipe 11 to increase the dissolved oxygen concentration in the water. When the buoy 5 drives the lever 7 to disconnect the automatic switch 6 due to the drop in the water level of the aerobic zone II, the pipe 9 can form a siphon, and the pump 8 continues The waste water is introduced from the facultative zone II into the aerobic zone III. When the water flows out from the Venturi tube 10, it encounters the baffle 12. After the water hits the baffle 12, the concentration of dissolved oxygen increases. After passing through the baffle 12, it flows again. To the deflector 13, the water flows through the deflector 13 to the part away from the aerobic zone II, so as to avoid the generation of treatment dead angle. When the water level in the aerobic area III reaches a certain height, the buoy 16 drives the lever 18 to switch on the automatic delay switch 17, starts the pump 19, starts the pump 19, and discharges the water to the biological filtration area IV through the pipeline 20, and the water flows from the biological filtration area IV. When the upper end is poured down, there are microorganisms growing on the surface of the activated carbon 21 , and after the biological treatment attached to the surface of the biological filler 15 , the overflow is discharged from the outlet 22 .

Claims (3)

1. A continuous treatment device for rural domestic sewage and wastewater, comprising a rectangular shell (1), characterized in that: the rectangular shell (1) is separated by an anaerobic zone (I), a facultative zone (II), an aerobic zone zone (Ⅲ), biofiltration zone (IV), the anaerobic zone (Ⅰ) is next to the facultative zone (II), and the aerobic zone (Ⅲ) is L-shaped, from the anaerobic zone (Ⅰ) and the facultative zone The bottom of (II) extends to the side of the facultative zone (II), the upper part of the aerobic zone (III) is the biofiltration zone (IV), and the aerobic zone (III) is suspended with biological fillers (15). The filter area (IV) is filled with activated carbon (21); The anaerobic zone (I) and the facultative zone (II) are connected by an outlet pipe (3), and the first buoy (5) is placed on the liquid surface in the anaerobic zone (II), and the first buoy (5) passes through the second A lever (7) is connected with the automatic switch (6); One end of the first pump (8) is connected to the middle and lower part of the aerobic zone (II) through a pipeline, and the other end extends from the top of the aerobic zone (III) to the shell wall and biological filter of the aerobic zone (III) through a pipeline zone (IV) between the housing walls, and the end of this line extending between the two said housing walls contains a venturi tube (10) and an air connection to the narrowest zone of the venturi tube (10). The other end of the tube (11) and the air tube (11) extends out of the housing (1); the opening of the Venturi tube (10) faces downward, and a baffle (12) is provided directly below the opening, and the baffle (12) A deflector (13) whose height is lower than the bottom of the biofiltration zone (IV) is set at the lower part of the biofiltration zone (IV). One end of the deflector (13) is movably connected to the inner wall of the shell of the aerobic zone (III), and the other end is placed on a floating surface. On the second floating ball (14) on the liquid surface of the oxygen zone (Ⅲ); on the liquid surface of the aerobic zone (Ⅲ), there is also a second buoy (16) floating on the liquid surface, and the second buoy (16) passes through the second lever (18 ) is connected to the automatic delay switch (17); a second pump (19) is set between the aerobic zone (Ⅲ) and the biological filtration zone (IV), and the outlet pipe of the second pump (19) extends in the biological filtration zone (IV )the top of. 2. A continuous treatment device for rural domestic sewage and wastewater according to claim 1, characterized in that: the sewage enters the anaerobic zone (I) from the top of the anaerobic zone (I) from the water inlet pipe (2), and the anaerobic zone (I) The area (I) is covered with a cover, which is in a semi-closed state, and the anaerobic area (I) occupies the largest volume among the four parts. 3. A continuous treatment device for rural domestic sewage and wastewater according to claim 1, characterized in that: the outlet pipe (3) is located in the middle and lower part between the anaerobic zone (I) and the facultative zone (II), and the anaerobic Zone (I) is provided with a mud outlet (4).

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