CN115304151A - A rural domestic sewage treatment and resource utilization system containing a small amount of aquaculture wastewater - Google Patents

Abstract

The application discloses a rural domestic sewage treatment and recycling system containing a small amount of breeding wastewater. The rural domestic sewage treatment and recycling system comprises a regulating tank, a hydrolysis acidification tank, an ABR tank, an overflow ramp, an earthworm ecological filter tank and an artificial wetland which are sequentially communicated according to the sewage flow treatment direction. The invention takes the waste wood, bricks, coal slag, sawdust, grain shells, absorbent stone and the like which are common in rural areas as the filler of the ecological filter tank and the artificial wetland, reduces the engineering cost and has good decontamination capability. This application sets up the overflow ramp of echelonment to set up cloth basin and perforated pipe in ecological filter, ecological filter adopts the intermittent type to intake, and the earthworm is cultivated to ecological filter surface course, through the unpowered oxygenation means of multiple, improves the pollutant greatly and gets rid of the effect. The application has low operation and maintenance cost, good treatment effect, reuse of the effluent farmland and water resource saving for rural domestic sewage containing a small amount of culture wastewater.

Description

A rural domestic sewage treatment and resource utilization system containing a small amount of aquaculture wastewater

technical field

The application relates to the technical field of sewage treatment, in particular to a rural domestic sewage treatment and recycling system containing a small amount of aquaculture wastewater.

Background technique

At present, livestock and poultry breeding in rural areas is very common, and most of them have not formed a scale. However, farming sewage is rarely collected and treated separately in rural areas, so it is inevitably mixed into rural domestic sewage, making the concentration of domestic sewage pollutants to be treated higher than Normal value, the general process for rural domestic sewage treatment cannot meet the design water standard. In order to meet the design standards, existing projects often increase the effect of biochemical treatment by adding external power, such as aeration, stirring, lifting, etc. Although the effluent can reach the standard, it will inevitably increase the project investment and operating costs, and the daily maintenance is more complicated. Rural areas, especially remote rural areas, lack supporting operation and maintenance funds and technical management personnel, which has reduced some projects to the situation of "basking in the sun" and failed to achieve the expected results.

For such rural domestic sewage containing a small amount of aquaculture wastewater, there is an urgent need for a sewage treatment process with low investment and operation and maintenance costs, simple management, and good results.

Contents of the invention

In view of this, the application provides a rural domestic sewage treatment and recycling system containing a small amount of aquaculture wastewater, which has low investment and operation and maintenance costs, simple management and good treatment effect.

This application provides a rural domestic sewage treatment and resource utilization system containing a small amount of aquaculture wastewater. According to the direction of sewage flow treatment, it includes a regulating pool, a hydrolysis acidification pool, an ABR pool, an overflow ramp, an earthworm ecological filter, and an artificial subsurface flow. wetlands.

Optionally, the overflow ramp is stepped.

Optionally, a distribution tank is arranged above the pool body of the earthworm ecological filter.

Optionally, the filter material of the earthworm ecological filter is at least two kinds of pebbles, waste bricks, waste wood, gravel, and quartz sand.

Optionally, the filler of the subsurface constructed wetland is at least two kinds of pebbles, waste bricks, waste wood, water-absorbing stones, gravel, and planting soil.

Optionally, perforated pipes are arranged inside the pond body of the earthworm ecological filter.

Optionally, the bottom of the tank body of the regulating tank is configured with a sedimentation hole, and the bottom surface of the tank body has a slope of 3‰ toward the sedimentation hole.

Optionally, a biogas collection device is connected to the top of the ABR pool.

Compared with related technologies, the present application has the following beneficial effects:

(1) The terrain slope is fully utilized, no external power is required, and the daily maintenance is only 2 to 4 times a year for cleaning and plant harvesting, and there is basically no operating cost.

(2) waste utilization, resource recovery. The present invention uses waste wood, bricks, cinders, sawdust, grain shells, and water-absorbing stones common in rural areas as fillers for ecological filters and artificial wetlands, which reduces engineering costs and has good decontamination capabilities; at the same time, the ABR reaction pool The generated biogas is recycled and used for cooking, saving energy and generating income.

(3) Increase oxygen without power, greatly improving the pollutant removal effect. The present invention adopts a variety of non-powered aeration measures: ①The overflow ramp adopts ladder-type water distribution, and protrusions are evenly arranged on the water distribution steps, so as to increase the contact surface between sewage and oxygen as much as possible within the limited flow; ②Ecological The filter adopts pressureless and uniform water distribution. When the sewage is distributed in the form of dripping water in the water distribution tank, it will fully contact with oxygen in the air in the state of small droplets; ; ④ The ecological filter adopts the form of intermittent water intake and full drying. During the seepage process, the sewage is in continuous three-phase contact with the air and biofilm to improve the conversion efficiency of ammonia nitrogen and reduce the load of organic matter; ⑤ The surface layer of the ecological filter is cultivated Earthworms, earthworms climb up and down the soil layer for food, dredging the filter bed and increasing the oxygen content of the filter bed.

(4) For rural domestic sewage containing a small amount of breeding wastewater, the treatment effect is good, and the effluent farmland can be reused to save water resources.

Description of drawings

The technical solutions and other beneficial effects of the present application will be apparent through the detailed description of the specific embodiments of the present application below in conjunction with the accompanying drawings.

Fig. 1 is the schematic structural diagram of the rural domestic sewage treatment and recycling system of the embodiment of the present application;

Fig. 2 is the structural representation of the adjustment tank and the hydrolytic acidification tank of the embodiment of the present application;

Fig. 3 is the structural representation of the ABR reaction cell of the embodiment of the present application;

Fig. 4 is the top view of the ABR reaction tank of the embodiment of the present application;

Fig. 5 is the structural representation of the overflow ramp of the embodiment of the present application;

Fig. 6 is the structural representation of the earthworm ecological filter pond of the embodiment of the present application;

Fig. 7 is the top view of the earthworm ecological filter pond of the embodiment of the present application;

Fig. 8 is a schematic structural diagram of the constructed wetland according to the embodiment of the present application.

Among them, the components in the figure are marked as follows:

1. Inlet pipe; 2. Adjusting tank; 3. Settling hole; 4. Water pipe; 5. Hydrolysis and acidification tank; 6. Biofilm carrier filler; 7. ABR tank inlet pipe; 8. ABR tank; 10. Biogas collection device; 11. Inspection hole; 12. Outlet pipe of ABR pool; 13. First sump; 14. Overflow weir; 15. Overflow ramp; 16. Second sump; 17. Water level Control switch; 18, earthworm ecological filter; 19, distribution tank; 20, opening; 21, perforated pipe; 22, soil layer; 23, the first gravel layer; 24, the first waste brick layer; 25, the first Pebble layer; 26. Supporting layer; 27. Ecological filter outlet switch; 28. Wetland water inlet pipe; 29. Constructed wetland; 30. Water inlet channel; 31. Connecting pipe; 32. Wetland plants; 33. Planting soil layer; 34 , the second gravel layer; 35, the waste wood layer; 36, the second waste brick layer; 37, the second pebble layer; 38, the geotextile filter layer; 39, the water hole; 40, the coarse gravel; 41, the outlet water pipe.

Detailed ways

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. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

In the description of the present application, it should be understood that the terms "first" and "second" are used for description purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise specifically defined.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

The following disclosure provides many different implementations or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and arrangements of specific examples are described below. Of course, they are examples only and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or reference letters in various instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art may recognize the use of other processes and/or the use of other materials.

As shown in Figures 1 to 8, a rural domestic sewage treatment and resource utilization system containing a small amount of aquaculture wastewater according to the embodiment of the present application includes a sequentially connected adjustment pool 2, a hydrolytic acidification pool 5, and an ABR according to the direction of sewage flow treatment. Pond 8, overflow ramp 15, earthworm ecological filter 18 and subsurface constructed wetland 29. The sewage treatment process of the present invention is as follows:

The sewage intercepted by the grid enters the regulating tank 2 through the water inlet pipe 1 to homogenize the water quality and quantity. A sedimentation hole 3 is provided at the bottom of the tank body of the regulating tank 2, and a slope of 3‰ is set on the bottom of the tank body toward the direction of the sedimentation hole 3 to facilitate sludge collection and drainage.

The effluent from the regulating tank 2 flows into the hydrolysis and acidification tank 5 through the water pipe 4, and the residence time of the sewage is 12 to 24 hours. The tank is filled with biofilm carrier filler 6, and the macromolecular organic matter suspended in the sewage is gradually decomposed by microorganisms and converted into small molecular organic matter and Inorganic substances are beneficial to subsequent biological treatment.

The pool body of the ABR pool 8 is equipped with an ABR pool inlet pipe 7 , a reactor top plate, a biofilm carrier filler 6 , a baffle plate 9 , a reactor bottom plate and an ABR pool outlet pipe 12 . The baffle plate 9 divides the reactor into a plurality of compartments in series, and the sewage flows through each compartment sequentially from bottom to top, and the organic matter is further decomposed under the action of the biofilm. Each compartment of the ABR pool 8 is 80-100 cm wide, and the top of each compartment is provided with a manhole cover plate, which has a manhole cover plate with a manhole 11 for easy maintenance. The bottom of the tank directly below the inspection hole 11 is provided with a sedimentation hole 3, which is convenient for sludge collection and drainage.

A biogas collection device 10 is installed on the top of the pool body of the ABR pool 8 to collect the biogas generated in the ABR pool 8 during the biochemical treatment and use it for cooking; the biofilm carrier filler 6 uses non-woven fabric as the film-hanging carrier filler.

The ABR pool 8 outlet water flows into the first sump 13 from the ABR pool outlet pipe 12, and overflows to the stepped overflow ramp 15 by the overflow weir 14 on the other side of the first sump 13, the overflow ramp 15 length It is 1.5m, and natural water-absorbing stone is used as raw material. The larger porosity of the water-absorbing stone can increase the sewage residence time, and at the same time provide more oxygen for the sewage, which is conducive to the subsequent nitrification reaction. Several protrusions are arranged on each step, and the top surface of the protrusions is about 1mm higher than the plane of the ramp. The sewage is collected in the second sump 16 through the overflow ramp 15 .

The second water collection tank 16 adopts the mode of intermittent water outlet, and is connected with the pressureless uniform water distribution device on the top of the earthworm ecological filter tank 18 through a plurality of water level control switches 17 . The water level control switch 17 adopts the principle of automatic control of the liquid level by water pressure. When the water level of the water outlet tank of the second sump 16 exceeds a certain set water level, the water level control switch 17 is automatically turned on, and the water level of the water outlet tank is released to a certain low water level. , and then the water level control switch 17 returns to the closed state.

The earthworm ecological filter 18 adopts the intermittent water intake mode, and its top is provided with a pressure-free uniform water distribution device. When the water level control switch 17 of the second sump 16 was turned on, the sewage flowed into the water distribution tank 19 which was erected horizontally on the top of the ecological filter, and evenly dripped to the earthworm ecological filter 18 surface through the water distribution tank 19 both sides and the holes on the bottom surface. The top surface of the water distribution tank 19 is hollowed out, and the bottom surface and both sides are provided with openings 20, so that the sewage in the water distribution process fully contacts with the air.

The filter material of the earthworm ecological filter tank 18 can be at least two kinds of pebbles, waste bricks, waste wood, gravel, and quartz sand. As a demonstration of the layout of the filter material, the filter material is filled with the first pebble layer 25 , the first waste brick layer 24 , the first gravel layer 23 and the soil layer 22 sequentially from bottom to top. The soil is a mixture of ordinary planting soil and at least one of slag, sawdust, grain husk, etc., for example, ordinary planting soil, slag, and sawdust are mixed in a volume ratio of 6:2:2. "Taiping No. 2" earthworms were raised in the soil, which has strong adaptability, fast growth and reproduction speed, and the dosage is 40/m ² .

In order to improve the anoxic state inside the ecological filter, 3 layers of perforated pipes 21 are evenly arranged on the surface and inside of the filter. The perforated pipes 21 are made of PVC, and the surroundings of the perforated pipes 21 are made of a matrix with a larger particle size than the perforated pipes. aperture. The outlet pipe of the ecological filter is provided with a manual switch. When the water flow of the system continues to be small, the outlet switch 27 of the ecological filter is closed to prevent the massive death of earthworms and microorganisms on the surface of the filter material caused by water shortage.

The outlet water of the earthworm ecological filter 18 enters the artificial wetland 29 from the wetland water inlet pipe 28, and the wetland water inlet pipe 28 has an ecological filter outlet water switch 27. The sewage entering the constructed wetland 29 enters the water inlet channel 30 first, and flows into the filler through the connecting pipe 31 at the lower part of the water inlet channel 30 . Then, it enters the outlet channel at the end through the water hole 39 to be filtered for resource utilization. Coarse gravels 40 are arranged in the outlet channel to filter the outlet channel, and the water filtered by the coarse gravels 40 is discharged from the outlet pipe 41 .

The bottom of the packing layer is supported by the hollow supporting layer 26 . Fillers for the constructed wetland 29 can be selected from at least two types of pebbles, waste bricks, waste wood, water-absorbing stones, gravel, and planting soil. For example, the second pebble layer 37, the second waste brick layer 36, and waste Wood layer 35, second gravel layer 34 and planting soil layer 33. A geotextile filter layer 38 is arranged at the part where the planting soil layer 33 is connected to the water hole 39 .

The wetland plants 32 planted in the constructed wetland 29 can be water-purifying plants such as reeds, cattails, reeds, barracudas, etc., or economic crops with water-purifying effects, such as sagittarius, wild rice stems, and cress. As a more specific implementation, reeds and cattails are planted on the surface of the constructed wetland 29 at intervals of 1:1. Water from the constructed wetland 29 is discharged into the corn field for irrigation.

The above is only a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any skilled person familiar with the technical field can easily think of changes or Replacement should be covered within the protection scope of this application.

Claims (8)

1. A rural domestic sewage treatment and resource utilization system containing a small amount of aquaculture wastewater is characterized in that, according to the direction of sewage flow treatment, it includes a regulating pool, a hydrolytic acidification pool, an ABR pool, an overflow ramp, and an earthworm ecological filter that are sequentially connected ,Artificial wetland. 2. The rural domestic sewage treatment and recycling system according to claim 1, characterized in that the overflow ramp is stepped. 3. The rural domestic sewage treatment and recycling system according to claim 1, characterized in that a water distribution tank is arranged above the pool body of the earthworm ecological filter. 4. The rural domestic sewage treatment and recycling system according to claim 1, wherein the filter material of the earthworm ecological filter is at least 2 of pebbles, waste bricks, waste wood, gravel, and quartz sand. kind. 5. The rural domestic sewage treatment and recycling system according to claim 1, characterized in that, the filler of the constructed wetland is at least two kinds of pebbles, waste bricks, waste wood, water-absorbing stones, gravel, and planting soil. 6. The rural domestic sewage treatment and recycling system according to claim 1, characterized in that, the interior of the earthworm ecological filter is equipped with a perforated pipe. 7. The rural domestic sewage treatment and recycling system according to claim 1, characterized in that, the bottom of the regulating tank is equipped with a sedimentation hole, and the bottom of the pool is formed in the direction of the sedimentation hole. 3‰ slope. 8. The rural domestic sewage treatment and recycling system according to claim 1, wherein a biogas collection device is connected to the top of the ABR pool.

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