CN221701270U - Small volume and high concentration wastewater treatment device - Google Patents

Abstract

The application discloses a small-water-quantity high-concentration wastewater treatment device. The sewage after degradation of the ABR reaction tank flows into an intermediate tank, and the sewage is lifted into a flow control tank by controlling a first lifting pump through a processor; then a first valve on the sewage reflux branch pipe is opened to control the constant sewage quantity to flow into the aerobic biological treatment system each time; finally, controlling the opening times of a first valve on the first water outlet pipe to control the constant sewage amount every day to enter the aerobic biological treatment system; therefore, the inflow of the aerobic biological treatment system can be effectively and stably controlled no matter how the flow of the pump is, and the sewage treatment effect is effectively ensured. The application solves the technical problem of poor sewage treatment effect caused by unstable water inflow of the aerobic biological treatment system due to the flow rate of the pump.

Description

Small volume and high concentration wastewater treatment device

Technical Field

The present application relates to the field of wastewater treatment, and in particular to a device for treating small-volume, high-concentration wastewater.

Background Art

There are many farmhouses and agricultural product processing workshops in my country's rural areas and towns. The daily operation or production of these places will produce a small amount of wastewater with high pollutant concentration. Although the water volume is small, due to the high concentration of pollutants, if it is directly discharged into the water body without effective treatment, the harm to the water body cannot be ignored. The high concentration of organic pollutants will consume a large amount of dissolved oxygen in the water body, causing serious hypoxia in the water body. Most aquatic organisms will die due to hypoxia and cause the water body to turn black and smelly. In addition, high concentrations of nitrogen and phosphorus will cause eutrophication of water bodies, leading to the massive reproduction of large algae, an increase in suspended particles, the formation of large-scale algal blooms, and damage to the ecological environment of benthic organisms.

The wastewater generated by these places is small in volume and easily overlooked. It is difficult to treat the wastewater with intermittent discharge, small volume and high pollutant concentration. At present, no effective treatment device and method has been reported for this type of wastewater. This type of wastewater has a high concentration of organic pollutants and low toxicity. Therefore, in some existing technologies, a biological treatment process combining anaerobic and aerobic treatment is used, which has high pollutant removal efficiency and low operating cost.

However, the nitrifying bacteria of aerobic reaction are autotrophic bacteria, and the growth of nitrifying bacteria is slow and the generation cycle is long, which leads to slow start-up of nitrification reaction. Therefore, aerobic reaction is more suitable for continuous operation mode. In order to realize the continuous operation of aerobic reaction, the first thing is to discharge the small amount of wastewater discharged intermittently into the aerobic treatment unit continuously. For larger water volumes, water pumps and valves on the outlet pipes of regulating water pumps can generally be used to achieve continuous water flow. However, the current water pump flow rate ranges from a few tons/hour to hundreds of tons/hour. However, the wastewater generated by farmhouses and agricultural product processing workshops in rural or townships is generally no more than 0.5 tons/hour. The use of water pumps and valves on the outlet pipes of regulating water pumps to achieve such a small amount of water continuous flow will not only cause pump blockage, but also the water flow rate of the pump is greatly affected by the change of liquid level, and even cause the pump to be unable to discharge water. Therefore, there is an urgent need for a treatment device for small water volume and high concentration wastewater to solve the above problems.

Summary of the invention

The main purpose of the present application is to provide a small-volume, high-concentration wastewater treatment device and method to solve the problem of poor sewage treatment effect caused by unstable water inflow of an aerobic biological treatment system due to limited pump flow.

In order to achieve the above-mentioned purpose, according to one aspect of the present application, a small-volume, high-concentration wastewater treatment device is provided.

The small-volume high-concentration wastewater treatment device according to the present application includes: a wastewater dumping tank, an oil-separating sedimentation tank, an ABR reaction tank and an intermediate water tank which are connected in sequence through a water pipe 1; a perforated aeration pipe is provided at the lower part of the wastewater dumping tank; the upper part of the ABR reaction tank is connected to a first drug adding box, and the top is connected to an exhaust gas purifier; a flow control tank is provided at the top of the intermediate water tank, and a first lifting pump is provided at the bottom, the first lifting pump is connected to the flow control tank, the flow control tank is connected to a sewage return main pipe through a sewage return branch pipe, is connected to the first lifting pump through a flow control pipe, is connected to an aerobic biological treatment system through a first outlet pipe, and the sewage return main pipe is connected to the outlet end of the water pipe 1 of the ABR reaction tank; a first valve is provided on both the sewage return branch pipe and the first outlet pipe; and also includes: a processor electrically connected to the first lifting pump and the first valve.

Furthermore, a first mud hopper is provided at the lower part of the oil-water separator sedimentation tank, a mud discharge pump is provided at the bottom of the first mud hopper, one end of the mud discharge pump is connected to the bottom of the mud storage tank through a first mud discharge pipe, the first mud discharge pipe is connected to a mud suction main pipe, the mud suction main pipe is connected to at least three mud suction branches, each mud suction branch pipe extends into each compartment of the ABR reaction tank, and a pipe plug is provided at one end thereof that is not connected to the mud suction main pipe; the middle part of the mud storage tank is connected to the bottom of the ABR reaction tank through a decanting pipe.

Furthermore, the upper part of the ABR reaction tank is connected to a first dosing box through a first dosing pipe, and a pH meter is also provided inside. The first dosing box is divided into an acid liquid tank and an alkali liquid tank. An acid dosing pump is provided in the acid liquid tank, and an alkali dosing pump is provided in the alkali liquid tank. The acid dosing pump, the alkali dosing pump, and the pH meter are electrically connected to the processor. The processor determines whether the pH value measured by the pH meter is within a preset pH range. If so, the acid dosing pump and the alkali dosing pump are controlled to stop the delivery; if not, the acid dosing pump or the alkali dosing pump is controlled to deliver acid or alkali.

Furthermore, each compartment top of the ABR reaction tank is connected to a waste gas collecting branch pipe, each of the waste gas collecting branch pipes is connected to a waste gas collecting main pipe, and the waste gas collecting main pipe is connected to a waste gas purifier.

Furthermore, the aerobic biological treatment system includes: a primary anoxic tank, a primary aerobic tank, a secondary anoxic tank, a secondary aerobic tank and a secondary sedimentation tank which are sequentially connected through a second water pipe, the primary anoxic tank is connected to the main pipe of the first outlet pipe, the first outlet pipe is also connected to a small branch pipe, the small branch pipe is connected to the secondary anoxic tank, and a second valve is provided on the small branch pipe; aerators are provided at the bottom of the primary aerobic tank and the secondary aerobic tank; the upper part of the secondary aerobic tank is connected to the second dosing barrel through a second dosing pipe.

Furthermore, a nitrification liquid reflux pipe is provided at the end of the first anoxic tank and the first aerobic tank, the water inlet end of the nitrification liquid reflux pipe extends into the bottom of the first aerobic tank, and the water outlet end thereof extends into the bottom of the first anoxic tank.

Furthermore, the second sedimentation tank is provided with a water outlet weir at the top, a second mud hopper at the bottom, and a reflector near the middle. The bottom of the mud hopper is connected to the mud storage tank through the first branch of the second mud discharge pipe, and is connected to the primary anoxic tank through the second branch of the second mud discharge pipe.

Furthermore, the secondary sedimentation tank is also connected to the reuse water pipe and the second water outlet pipe through a water pipe three. The reuse water pipe and the second water outlet pipe are respectively connected to the reuse water pool and the discharge well, and are each provided with a third valve; a second lifting pump is provided in the reuse water pool, and the second lifting pump is connected to a faucet, and the faucet is located at the top of the reuse water pool.

Furthermore, it also includes: an air intake main pipe, which is connected to a plurality of air intake branches, and its end is connected to the fan, and the plurality of air intake branches are respectively connected to the wastewater dumping tank, the sludge storage tank, the first-level anoxic tank, the first-level aerobic tank, the second-level anoxic tank, the second-level aerobic tank, the second sedimentation tank sludge discharge pipe, the reuse water tank and the nitrification liquid reflux pipe.

In the embodiment of the present application, a method of controlling the amount of water entering the aerobic biological treatment system is adopted. By flowing the sewage degraded in the ABR reaction tank into the intermediate water tank, the first lifting pump is first controlled by the processor to lift the sewage into the flow control tank; then the first valve on the sewage return branch pipe is opened to control a constant amount of sewage to flow into the aerobic biological treatment system each time; finally, the number of times the first valve on the first outlet pipe is opened is controlled to control a constant amount of sewage to enter the aerobic biological treatment system every day; the purpose of effectively and stably controlling the water inlet of the aerobic biological treatment system regardless of the flow rate of the pump is achieved, thereby achieving the technical effect of effectively ensuring the sewage treatment effect, and further solving the technical problem of poor sewage treatment effect caused by unstable water inlet of the aerobic biological treatment system due to the limitation of the pump flow rate.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

FIG1 is a plan view according to an embodiment of the present application;

FIG2 is a cross-sectional view taken along line A-A according to an embodiment of the present application;

FIG3 is a B-B cross-sectional view according to an embodiment of the present application;

FIG4 is a C-C cross-sectional view according to an embodiment of the present application;

FIG5 is a D-D cross-sectional view according to an embodiment of the present application.

Reference numerals

1. Wastewater dumping tank; 2. Oil separation sedimentation tank; 2a. First mud hopper; 3. ABR reaction tank; 4. Intermediate water tank; 5. Flow control tank; 6. Mud storage tank; 7. Primary anoxic tank; 8. Primary aerobic tank; 9. Secondary anoxic tank; 10. Secondary aerobic tank; 11. Secondary sedimentation tank; 11a. Outlet weir; 11b. Second mud hopper; 11c. Reflector; 11d. Center tube; 12. Recycled water tank; 13. Mud pump; 14a. First lifting pump; 14b. Second lifting pump; 15. Aerator; 16a. First water pipe; 16b. Second water pipe; 16c. Third water pipe; 16d. Fourth water pipe; 16e. Fifth water pipe; 16f. Flow control pipe; 16g. Sewage return main pipe ; 16h, the first water outlet pipe; 16i, the sixth water pipe; 16j, the seventh water pipe; 16k, the eighth water pipe; 16l, the ninth water pipe; 16m, the tenth water pipe; 16m1, the recycled water pipe; 16m2, the second water outlet pipe; 16n, the decanting pipe; 17, the faucet; 18a, the first mud discharge pipe; 18b, the mud suction main pipe; 18b1, the mud suction branch pipe; 18c, the second mud discharge pipe; 18c1, the first branch pipe; 18c2, the second branch pipe; 19, the air intake main pipe; 19a, the air intake branch pipe; 20a, the first dosing pipe; 20b, the second dosing pipe; 21, the exhaust gas collection main pipe; 22, the nitrification liquid reflux pipe; 23a, the first valve; 23b, the second valve; 23c, the third valve.

DETAILED DESCRIPTION

In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

As shown in Figures 1-5, the present application relates to a small-volume high-concentration wastewater treatment device, which includes: a wastewater dumping tank 1, an oil-separating sedimentation tank 2, an ABR reaction tank 3 and an intermediate water tank 4 which are sequentially connected through a water pipe 1; a perforated aeration pipe is provided at the lower part of the wastewater dumping tank 1;

Specifically, a dumping port is provided at the upper portion of the wastewater dumping tank 1 ; further, a plurality of first water pipes 16 a are provided at the middle portion of the partition between the wastewater dumping tank 1 and the oil separation sedimentation tank 2 .

A second water pipe 16b is provided at the upper part of the oil-water separation sedimentation tank 2, and the water inlet end of the second water pipe 16b is connected to a tee, the top of the tee is at least 50 mm higher than the designed liquid level in the tank, and the bottom is immersed in sewage, and the water outlet end of the second water pipe 16b is connected to the perforated water pipe at the lower part of the first compartment of the ABR reaction tank 3; further, the oil-water separation sedimentation tank 2 is also provided with a liquid level meter for real-time detection of liquid level data. Specifically, a first mud hopper 2a is provided at the lower part of the oil-water separation sedimentation tank 2, and a mud pump 13 is provided at the bottom of the first mud hopper 2a. One end of the mud pump 13 is connected to the bottom of the mud storage tank 6 through a first mud discharge pipe 18a. The first mud discharge pipe 18a is connected to a mud suction main pipe 18b, and the mud suction main pipe 18b is connected to at least three mud suction branches 18b1. Each mud suction branch pipe 18b1 extends into each compartment of the ABR reaction tank 3, and one end thereof that is not connected to the mud suction main pipe 18b is provided with a pipe plug; the middle part of the mud storage tank 6 is connected to the bottom of the ABR reaction tank 3 through a decanting pipe 16n.

The ABR reaction tank 3 has at least three compartments, and a perforated water pipe is provided at the lower part of the compartment; further, a third water pipe 16c, a fourth water pipe 16d, and a fifth water pipe 16e are provided at the upper part of the compartment; the water outlet ends of the third and fourth water pipes 16d are respectively connected to the perforated water pipes at the lower part of the second compartment and the third compartment, and the fifth water pipe 16e extends into the middle water tank 4.

The upper part of the ABR reaction tank 3 is connected to the first drug adding box, and the top is connected to the exhaust gas purifier;

Specifically, the upper part of the ABR reaction tank 3 is connected to the first dosing box through the first dosing pipe 20a, and a pH meter is also provided inside. The first dosing box is divided into an acid liquid tank and an alkali liquid tank. An acid pump is provided in the acid liquid tank, and an alkali pump is provided in the alkali liquid tank. The acid pump, the alkali pump, and the pH meter are electrically connected to the processor. The processor determines whether the pH value measured by the pH meter is within a preset pH range. If so, the acid pump and the alkali pump are controlled to stop the delivery; if not, the acid pump or the alkali pump is controlled to deliver acid or alkali.

The top of each compartment of the ABR reaction tank 3 is connected to a waste gas collecting branch pipe, each of the waste gas collecting branch pipes is connected to a waste gas collecting main pipe 21, and the waste gas collecting main pipe 21 is connected to a waste gas purifier.

A flow control tank 5 is provided on the top of the intermediate water tank 4, and a first lifting pump 14a is provided on the bottom. The first lifting pump 14a is connected to the flow control tank 5. The flow control tank 5 is connected to the sewage return main pipe 16g through the sewage return branch pipe, connected to the first lifting pump 14a through the flow control pipe 16f, and connected to the aerobic biological treatment system through the first outlet pipe 16h. The sewage return main pipe 16g is connected to the outlet end of the water pipe 1 of the ABR reaction tank 3; the sewage return branch pipe and the first outlet pipe 16h are both provided with a first valve 23a;

Specifically, the bottom of the intermediate water tank 4 is provided with a first lifting pump 14a, and the top is provided with a flow control tank 5; the upper part of the flow control tank 5 is provided with a flow control pipe 16f, and the flow control pipe 16f is connected to the first lifting pump 14a; at least 3 sewage return branch pipes are provided in the middle, and valves are provided on the sewage return branch pipes. The sewage return branch pipes extend into the first compartment of the ABR reaction tank 3 through the sewage return main pipe 16g to connect the outlet end of the second water pipe 16b; the bottom is provided with a first outlet pipe 16h, and a valve is provided on the first outlet pipe 16h, which is connected to the primary anoxic tank 7 in the aerobic biological treatment system. Further, the intermediate water tank 4 is also provided with a liquid level meter for measuring the liquid level data of the intermediate water tank 4.

It should be understood that the water pipe 1 is the first water pipe 16a, the second water pipe 16b, the third water pipe 16c, the fourth water pipe 16d or the fifth water pipe 16e.

It should also be understood that the water pipe 2 is the sixth water pipe 16i, the seventh water pipe 16j, the eighth water pipe 16k or the ninth water pipe 16l.

The method also includes: a processor electrically connected to the first lifting pump 14a and the first valve 23a; the sewage enters the oil-water separation sedimentation tank 2 through the wastewater dumping tank 1 for solid-liquid separation, the separated sewage enters the ABR reaction tank 3 for anaerobic microbial degradation, and the degraded sewage flows into the intermediate water tank 4, firstly the first lifting pump 14a is controlled by the processor to lift the sewage to the flow control tank 5; then the first valve 23a on the sewage return branch pipe is opened to control a constant amount of sewage to flow into the aerobic biological treatment system each time; then the number of times the first valve 23a on the first outlet pipe 16h is opened is controlled to control a constant amount of sewage to enter the aerobic biological treatment system every day; finally, the sewage in the ABR reaction tank 3 is diluted and the pH is adjusted by the returned sewage, and the sewage entering is aerobically treated by the aerobic biological treatment system before being discharged or recycled.

Specifically, the transported wastewater is poured into the wastewater dumping pool 1, and the perforated aeration pipe at the bottom of the wastewater dumping pool 1 aerates the wastewater to prevent sludge accumulation at the bottom of the pool; then the wastewater flows into the oil-separating sedimentation pool 2 through the first water pipe 16a for solid-liquid separation, and the supernatant enters the second water pipe 16b from the bottom of the tee; the floating oil floats on the liquid surface and is cleaned by regular salvage; the sludge sinks to the bottom of the mud hopper and is discharged into the mud storage pool 6 by the mud discharge pump 13 for temporary storage. The surface load of the oil-separating sedimentation pool 2 is 0.05-0.1m3/m2·h.

The sewage flows into the ABR reaction tank 3 through the second water pipe 16b, and the acid or alkali solution is added to the first compartment of the ABR reactor through the first dosing pipe 20a to adjust the pH of the wastewater to 6-9; the wastewater is fully in contact with the anaerobic microorganisms in the process of flowing upward evenly from the perforated water pipe at the bottom of the compartment, and the organic pollutants are greatly degraded step by step in each compartment. The hydraulic retention time of the ABR reactor is 10-20 days. The start and stop of the acid or alkali solution dosing pump is controlled according to the signal fed back by the pH value. When the pH is less than 6, the alkali solution dosing pump is turned on, when the pH is greater than 9, the acid solution dosing pump is turned on, and when the pH is 6-9, the dosing pump is turned off.

After the sludge pump 13 in the oil-water separator sedimentation tank 2 is started, when the liquid level drops to the set liquid level due to sludge discharge, the liquid level signal is fed back to the processor, and the valve at the top of the inverted U-shaped pipe of the oil-water separator sedimentation tank 2 is automatically opened. Because the set liquid level is lower than the liquid level of the ABR reaction tank 3, the sludge in the ABR reaction tank 3 is discharged into the oil-water separator sedimentation tank 2 through the sludge suction branch pipe 18b1 and the main pipe, and then discharged into the sludge storage tank 6 by the sludge pump 13.

The sewage degraded by anaerobic microorganisms in the ABR reaction tank 3 flows into the intermediate water tank 4 through the fifth water pipe 16e, and then is lifted to the flow control tank 5 by the first lifting pump 14a. The first valve 23a on the sewage return branch of the flow control tank 5 can be opened to control the constant amount of water to enter the aerobic biological treatment system each time, and then the number of valve openings on the first outlet pipe 16h can be controlled to achieve a constant amount of sewage entering the aerobic biological treatment system every day. The excess sewage is returned to the first compartment of the ABR reaction tank 3 through the sewage return main pipe 16g, which can not only adjust the influent pH of the ABR reaction tank 3 and dilute the influent pollutant concentration, but also hydraulically stir the sewage in the ABR reaction tank 3 to make the reaction between the sewage and microorganisms, acid or alkali solution more sufficient.

By combining the flow control tank 5 with the reflux loop and valve control, it is possible to ensure that the water inflow of the aerobic biological treatment system can be effectively and stably controlled regardless of the flow rate of the pump.

After the remaining sludge is discharged into the sludge storage tank 6, it is decanted and concentrated and aerated to increase the solid content, thereby reducing the volume. The supernatant flows into the first compartment of the ABR reaction tank 3 through the decanting pipe 16n and is processed together with the influent. The concentrated sludge is transported to the sludge or solid waste disposal center for disposal.

The waste gas generated by the ABR reaction tank 3 is collected by the gas collecting branch pipe at the top thereof and discharged into the waste gas purifier through the gas collecting main pipe for purification treatment.

It should be understood that the control of the valve requires manual pressing of a switch-type device to trigger the controller to control the valve.

From the above description, it can be seen that the present application achieves the following technical effects:

In the embodiment of the present application, the water inlet into the aerobic biological treatment system is controlled. By flowing the sewage degraded by the ABR reaction tank 3 into the intermediate water tank 4, the first lifting pump 14a is controlled by the processor to lift the sewage into the flow control tank 5; then the first valve 23a on the sewage return branch pipe is opened to control a constant water outlet to enter the aerobic biological treatment system each time; finally, the number of openings of the first valve 23a on the first outlet pipe 16h is controlled to control a constant amount of sewage to enter the aerobic biological treatment system every day; the purpose of effectively and stably controlling the water inlet of the aerobic biological treatment system regardless of the flow rate of the pump is achieved, thereby achieving the technical effect of effectively ensuring the sewage treatment effect, and further solving the technical problem of poor sewage treatment effect caused by unstable water inlet of the aerobic biological treatment system due to the limitation of the pump flow rate.

Preferably, the aerobic biological treatment system comprises: a primary anoxic tank 7, a primary aerobic tank 8, a secondary anoxic tank 9, a secondary aerobic tank 10 and a secondary sedimentation tank 11 which are sequentially connected through a water pipe 2, the primary anoxic tank 7 is connected to the main pipe of the first outlet pipe 16h, the first outlet pipe 16h is also connected to a small branch pipe, the small branch pipe is connected to the secondary anoxic tank 9, and a second valve 23b is provided on it; an aerator 15 is provided at the bottom of the primary aerobic tank 8 and the secondary aerobic tank 10; the upper part of the secondary aerobic tank 10 is connected to the second dosing barrel through a second dosing pipe 20b.

Specifically, a small branch pipe is provided on the first water outlet pipe 16h, and a second valve 23b is provided on the small branch pipe, which leads to the secondary anoxic pool 9, and the diameter of the small branch pipe is 1/5 to 1/3 of the diameter of the first water outlet pipe 16h.

A perforated water pipe and a perforated air pipe are provided at the bottom of the first-level anoxic pool 7, and the perforated water pipe is connected to the first water outlet pipe 16h. A sixth water pipe 16i is provided on the upper part of the partition of the primary anoxic tank 7 and the primary aerobic tank 8; a water collecting pipe is provided on the upper part of the primary aerobic tank 8; a seventh water pipe 16j is provided on the upper part of the partition of the primary aerobic tank 8 and the secondary anoxic tank 9, and the water inlet end of the seventh water pipe 16j is connected to the water collecting pipe of the primary aerobic tank 8; a perforated water pipe and a perforated air pipe are provided at the bottom of the anoxic tank of the secondary anoxic tank 9, and the perforated water pipe is connected to the water outlet end of the seventh water pipe 16j; an eighth water pipe 16k is provided on the upper part of the partition of the secondary anoxic tank 9 and the secondary aerobic tank 10, an aerator 15 is provided at the bottom of the secondary aerobic tank 10, and a second dosing pipe 20b and a water collecting pipe are provided on the upper part, and the second dosing pipe 20b is connected to the external second dosing barrel; a ninth water pipe 16l is provided on the partition of the secondary aerobic tank 10 and the second sedimentation tank 11, and the water inlet end of the ninth water pipe 16l is connected to the water collecting pipe of the secondary aerobic tank 10. A water passage is realized between the primary anoxic tank 7, the primary aerobic tank 8, the secondary anoxic tank 9, the secondary aerobic tank 10 and the secondary sedimentation tank 11 to ensure aerobic biological treatment.

It should be understood that the volume of the first anoxic pool 7 is larger than that of the second anoxic pool, and the volume of the first aerobic pool is larger than that of the second aerobic pool 10.

Furthermore, a nitrification liquid reflux pipe 22 is provided at the end of the first anoxic tank 7 and the first aerobic tank 8 , the water inlet end of the nitrification liquid reflux pipe 22 extends into the bottom of the first aerobic tank 8 , and the water outlet end thereof extends into the bottom of the first anoxic tank 7 .

Furthermore, the secondary sedimentation tank 11 is provided with a water outlet weir 11a at the top, a second mud hopper 11b at the bottom, and a reflector 11c near the middle. The bottom of the mud hopper is connected to the mud storage tank 6 through the first branch 18c1 of the second mud discharge pipe 18c, and is connected to the primary anoxic tank 7 through the second branch 18c2 of the second mud discharge pipe 18c.

Specifically, the water outlet end of the ninth water pipe 16l is connected to the central tube 11d of the second sedimentation tank 11; the second sedimentation tank 11 is provided with a central tube 11d, and a reflector 11c is provided under the central tube 11d. The mud inlet end of the second mud discharge pipe 18c is located at the bottom of the mud hopper, and the mud outlet end is divided into two paths and is respectively provided with a valve, one path extends into the bottom of the first anoxic tank 7, and the other path extends into the mud storage tank 6.

Furthermore, the secondary sedimentation tank 11 is also connected to the reuse water pipe 16m1 and the second water outlet pipe 16m2 through a water pipe three. The reuse water pipe 16m1 and the second water outlet pipe 16m2 are respectively connected to the reuse water pool 12 and the discharge well, and are each provided with a third valve 23c; a second lifting pump 14b is provided in the reuse water pool 12, and the second lifting pump 14b is connected to a faucet 17, and the faucet 17 is located at the top of the reuse water pool 12.

Specifically, a tenth water pipe 16m is provided on the upper part of the partition between the secondary sedimentation tank 11 and the reuse water tank 12, the bottom of the tenth water pipe 16m is flush with the bottom of the outlet weir 11a, the tenth water pipe 16m is divided into two paths and is provided with a third valve 23c, one path leads to the reuse water tank 12, and the other path extends out of the reuse water tank 12 to be the second outlet pipe 16m2, and the second outlet pipe 16m2 is connected to the discharge well outside the device. The reuse water tank 12 is provided with a lifting pump and a liquid level gauge, the outlet end connecting pipe of the lifting pump extends out of the tank top, and is provided with a faucet 17.

It should be understood that water pipe three is the tenth water pipe 16m.

Preferably, it also includes: an air intake main pipe 19, the air intake main pipe 19 is connected to a plurality of air intake branches 19a, and the end of the air intake branch pipe 19a is connected to the wastewater dumping tank 1, the sludge storage tank 6, the primary anoxic tank 7, the primary aerobic tank 8, the secondary anoxic tank 9, the secondary aerobic tank 10, the secondary sedimentation tank sludge discharge pipe 18c, the reused water tank 12 and the nitrification liquid return pipe 22. Air needs to be introduced into the wastewater dumping tank 1, the sludge storage tank 6, the primary anoxic tank 7, the primary aerobic tank 8, the secondary anoxic tank 9, the secondary aerobic tank 10, the secondary sedimentation tank sludge discharge pipe 18c, the reused water tank 12 and the nitrification liquid return pipe 22 to ensure the normal progress of the reaction.

The specific process of aerobic treatment is as follows:

After the wastewater is anaerobic treated, the concentration of organic pollutants is reduced by more than 70-90%, and the macromolecular organic pollutants are degraded into small molecular organic pollutants, providing carbon sources for microorganisms in the later aerobic treatment process. Then 95-100% of the effluent enters the primary anoxic tank 7, where denitrifying bacteria use the organic matter in the influent as a carbon source to denitrify the nitrate brought in from the mixed liquid reflux of the primary aerobic tank 8, that is, to convert nitrate and nitrite into nitrogen gas and discharge it into the air, thereby realizing the denitrification process; the sewage then enters the primary aerobic tank 8, where polyphosphate bacteria not only absorb and utilize the sewage In addition to the easily degradable BOD remaining in the water, the wastewater mainly decomposes the PHB stored in the body to generate energy for its own growth and reproduction, and actively absorbs excessive dissolved phosphorus in the sewage and stores it in the body in the form of polyphosphate; then the sewage flows from the primary aerobic pool 8 into the secondary anoxic pool 9, and the secondary anoxic pool 9 uses the nitrate produced by the primary aerobic pool 8 as an electron acceptor, and uses the remaining carbon source or internal carbon source or 0-5% of the organic pollutants in the effluent of the anaerobic treatment module as an electron donor to further improve the denitrification effect, and then the sewage enters the secondary aerobic pool 10, and the aeration of the secondary aerobic pool 10 blows off the nitrogen in the sewage. The hydraulic retention time of the primary anoxic pool 7, the primary aerobic pool 8, the secondary anoxic pool 9, and the secondary aerobic pool 10 are 3-6d, 5-8d, 1-2d, and 1.5-3d, respectively.

At the end of the secondary aerobic pool 10, a chemical agent is added through the second dosing pipe 20b. The chemical agent is PAC. The free phosphorus that is not absorbed by the polyphosphate bacteria reacts with the PAC to generate a precipitate, and the phosphorus in the sewage is further removed.

Finally, the sewage enters the secondary sedimentation tank 11. Under the action of gravity, mud and water are separated and suspended pollutants are removed. The sewage flows out from the effluent weir 11a at the top of the secondary sedimentation tank 11. Its water quality has reached the standard. The effluent is divided into two ways and valves are installed. One way enters the discharge well outside the treatment tank, and the other way enters the reuse water tank 12. The reuse water tank 12 is equipped with a booster pump and a faucet 17. When villagers need water, they close the discharge valve and can directly take water from the faucet 17. When they do not need water, they close the water inlet valve of the reuse water tank 12 and the sewage is discharged from the discharge well. The sludge sinks into the sludge area at the bottom of the secondary sedimentation tank 11 under the action of gravity. A part of it flows back to the primary anoxic tank 7 to realize the recycling of microorganisms. A part of the phosphorus-rich sludge is discharged into the sludge storage tank 6, and phosphorus in the sewage is removed. The surface load of the secondary sedimentation tank 11 is ^0.1-0.3m3 / ^m2 ·h, and the sedimentation time is 10-15d.

In addition to being able to operate continuously and stably to ensure the sewage treatment effect, the small-volume, high-concentration wastewater treatment device of the present application has a compact structure, small footprint, few electromechanical equipment, low energy consumption, and a high degree of automation.

The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (9)

1. A small-water-volume high-concentration wastewater treatment device, characterized by comprising:

The waste water dumping pool, the oil separation sedimentation pool, the ABR reaction pool and the middle pool are sequentially communicated through the first water passing pipe;

The lower part of the waste water dumping pool is provided with a perforated aeration pipe;

The upper part of the ABR reaction tank is communicated with a first dosing tank, and the top of the ABR reaction tank is communicated with an exhaust gas purifier;

The top of the middle water tank is provided with a flow control tank, the bottom of the middle water tank is provided with a first lifting pump, the first lifting pump is communicated with the flow control tank, the flow control tank is communicated with a sewage backflow main pipe through a sewage backflow branch pipe, the first lifting pump is communicated with a first lifting pump through a flow control pipe, and the sewage backflow main pipe is communicated with the water outlet end of a water pipe I of the ABR reaction tank;

The sewage backflow branch pipe and the first water outlet pipe are respectively provided with a first valve;

Further comprises: and the processor is electrically connected with the first lift pump and the first valve.

2. The small-water-quantity high-concentration wastewater treatment device according to claim 1, wherein a first sludge hopper is arranged at the lower part of the oil separation sedimentation tank, a sludge pump is arranged at the bottom of the first sludge hopper, one end of the sludge pump is communicated to the bottom of the sludge storage tank through a first sludge discharge pipe, a sludge suction main pipe is communicated with the first sludge discharge pipe, at least three sludge suction branch pipes are communicated with the sludge suction main pipe, each sludge suction branch pipe extends into each compartment of the ABR reaction tank respectively, and a pipe plug is arranged at one end of the sludge suction main pipe, which is not communicated with the sludge suction main pipe; the middle part of the mud storage pool is communicated with the bottom of the ABR reaction pool through a decanting pipe.

3. The small-water-quantity high-concentration wastewater treatment device according to claim 1, wherein the upper part of the ABR reaction tank is communicated with a first dosing tank through a first dosing pipe, a pH meter is further arranged in the ABR reaction tank, the first dosing tank is divided into an acid liquor bin and an alkali liquor bin, an acid adding pump is arranged in the acid liquor bin, an alkali adding pump is arranged in the alkali liquor bin, the acid adding pump, the alkali adding pump and the pH meter are electrically connected with the processor, and the processor is used for judging whether the pH value measured by the pH meter is in a preset pH range or not, and stopping dosing if the pH value measured by the pH meter is in a preset pH range; if not, controlling an acid adding pump or an alkali adding pump to add acid liquid or alkali liquid.

4. The small-water-volume high-concentration wastewater treatment device according to claim 1, wherein the top of each compartment of the ABR reaction tank is respectively communicated with an exhaust gas collecting branch pipe, each exhaust gas collecting branch pipe is communicated with an exhaust gas collecting main pipe, and the exhaust gas collecting main pipe is communicated with an exhaust gas purifier.

5. The small water amount high concentration wastewater treatment apparatus according to claim 2, wherein the aerobic biological treatment system comprises: the first anoxic tank is communicated with a main pipe of the first water outlet pipe, the first water outlet pipe is also communicated with a small branch pipe, the small branch pipe is communicated with the second anoxic tank, and a second valve is arranged on the small branch pipe; the bottoms of the primary aerobic tank and the secondary aerobic tank are provided with aerators; the upper part of the secondary aerobic tank is communicated with a second dosing barrel through a second dosing pipe.

6. The small-water-volume high-concentration wastewater treatment device according to claim 5, wherein the ends of the tank bodies of the primary anoxic tank and the primary aerobic tank are provided with nitrifying liquid return pipes, the water inlet ends of the nitrifying liquid return pipes extend into the bottom of the primary aerobic tank, and the water outlet ends of the nitrifying liquid return pipes extend into the bottom of the primary anoxic tank.

7. The small-water-volume high-concentration wastewater treatment device according to claim 6, wherein the upper part of the secondary sedimentation tank is provided with a water outlet weir, the lower part of the secondary sedimentation tank is provided with a second mud bucket, a reflecting plate is arranged at a position close to the middle part of the secondary sedimentation tank, the bottom of the mud bucket is communicated with the mud storage tank through a first branch pipe of a second mud pipe, and the bottom of the mud bucket is communicated with the primary anoxic tank through a second branch pipe of the second mud pipe.

8. The small-water-quantity high-concentration wastewater treatment device according to claim 7, wherein the secondary sedimentation tank is further communicated with a reuse water pipe and a second water outlet pipe through a water passing pipe III, the reuse water pipe and the second water outlet pipe are respectively communicated with a reuse water tank and a discharge well, and third valves are arranged on the reuse water pipe and the second water outlet pipe; the recycling water tank is internally provided with a second lifting pump, the second lifting pump is communicated with a water tap, and the water tap is positioned at the top of the recycling water tank.

9. The small-water-amount high-concentration wastewater treatment apparatus according to claim 8, further comprising: the device comprises an air inlet main pipe, a plurality of air inlet branch pipes, a recycling water pool and a nitrifying liquid return pipe, wherein the air inlet main pipe is communicated with the plurality of air inlet branch pipes, the end parts of the air inlet main pipe are connected with a fan, and the plurality of air inlet branch pipes are respectively communicated with the waste water dumping pool, the mud storage pool, the primary anoxic pool, the primary aerobic pool, the secondary anoxic pool, the secondary aerobic pool, the secondary sedimentation tank mud discharge pipe, the recycling water pool and the nitrifying liquid return pipe.