WO2019085393A1 - Sewage treatment device, treatment method and treatment system - Google Patents

Abstract

Disclosed is a sewage ecological treatment device (1), comprising an accommodation body (11), a partition plate (12) and a plant purification column (15), wherein the partition plate (12) divides the accommodation body (11) into a cofferdam area (13) with an upper opening and a lower enclosing area (14), the accommodation body (11) is provided with a water inlet pipe (18) and a water outlet pipe (19), the cofferdam area (13) is laid with a filter material layer (131) and a soil layer (132), the soil layer (132) is planted with herbaceous plants (133), and the enclosing area (14) is filled with an infiltration filler (141); and the plant purification column (15) comprises an aquatic plant (151) and a pipe body (152) for carrying and planting the aquatic plant (151), and the pipe body (152) penetrates through the partition plate (12) and connects the enclosing area (14) with the cofferdam area (13). Also disclosed are a sewage treatment method and system.

Description

Sewage treatment device, treatment method and treatment system Technical field

The present disclosure relates to the field of sewage treatment technology, for example, to a sewage treatment device, a treatment method, and a treatment system.

Background technique

As a small-scale domestic sewage treatment method, soil percolation has been more and more widely used in recent years. The soil infiltration method is an in-situ sewage ecological treatment technology based on the principle of natural ecological purification combined with conventional anaerobic and aerobic wastewater treatment processes. The domestic sewage will be precipitated in the septic tank and anaerobic pretreated, and then distributed to the soil percolation trench through the water distribution pipe. Under the action of capillary infiltration and soil percolation, the sewage will spread everywhere, through physical interception and chemical precipitation. With the adsorption and microbial degradation, the pollutants in the water can be removed.

However, the soil percolation method also has some restrictive problems, in which the large area and the poor removal effect of nitrogen and phosphorus are prominent shortcomings. In addition, although the soil infiltration sewage treatment facility is equipped with soil layers and plants on the surface layer, due to the limitation of facility structure and plant variety, the removal of pollutants unique to plant roots is minimal, so it is difficult to achieve the ecological treatment effect of constructed wetland plants. , only limited to the greening of the treatment facilities.

In addition, the soil percolating tank body is designed in combination with the ground surface, so it is fixed on the ground and is not easy to move, and the size of the soil percolating tank body cannot be adjusted according to the treatment volume of the sewage, which limits the soil to a large extent. The popularization and application of percolation method in the field of sewage ecological treatment. For many years, despite the numerous improvements and optimization countermeasures for the infiltration of soil percolation methods, they have not been resolved from the perspectives of economy, applicability and effectiveness.

Summary of the invention

The invention provides a sewage treatment device and a treatment method, and solves the outstanding problem that the soil percolation method has a large land area, the ecological effect of the plant root system is limited, and the nitrogen and phosphorus removal effect is poor, and the soil infiltration is maintained. Based on the advantages of the filtration technology, the advantages and disadvantages of the sewage treatment and the comprehensive cost performance are improved.

A sewage treatment device comprising:

The accommodating body has an accommodating space at the upper end;

a partition plate located in the accommodating space and partitioning the accommodating body into a dam area at an upper portion and a closed area at a lower portion, the accommodating body is provided with an inlet pipe communicating with the closed area and An outlet pipe communicating with the cofferdam area, the cofferdam area is provided with a filter layer and a soil layer located on the filter layer, the soil layer is arranged to plant a herb, and the closed area is filled with an infiltration Filter packing

a plurality of plant purification columns, the plurality of plant purification columns being distributed on the partition, the plurality of plant purification columns comprising a tube body disposed to carry and plant aquatic plants, the tube body penetrating the partition plate and Connecting the enclosed area and the cofferdam area.

Optionally, the tube body is detachably mounted on the partition plate, the upper port of the tube body is not lower than the soil layer, and the lower port of the tube body is located in the percolation packing, The lumen of the tubular body is configured to be filled with a bundled root core composed of a plurality of said aquatic plants.

Optionally, the pipe body is provided with a water inlet hole communicating with the closed area and a water outlet hole communicating with the cofferdam area.

Optionally, the upper rotating sleeve of the pipe body is provided with a water reversing ring, and the water reversing ring is provided with a through hole corresponding to the water outlet hole, and the water reversing ring can be rotated to control the Opening and closing of the water outlet.

Optionally, a flexible aeration tube is disposed inside the tube body, and a lower end of the flexible aeration tube is disposed to be inserted into the bundle root column core, and an upper end of the flexible aeration tube is connected to the air pump.

Optionally, a mesh material is disposed between the filter layer and the soil layer.

Optionally, a water distribution pipe is connected to the water inlet pipe in the closed area, the water distribution pipe is located at a bottom of the closed area, and the water distribution pipe is a branch structure composed of a main pipe and a branch pipe, and the branch pipe is A plurality of water permeable holes are opened.

Optionally, a water collecting pipe is connected to the water outlet pipe in the cofferdam, the water collecting pipe is located at a bottom of the cofferdam, and the water collecting pipe is a branch structure composed of a main pipe and a branch pipe. A plurality of water permeable holes are opened in the branch pipe.

A sewage treatment method for use in a sewage treatment apparatus as described above, comprising:

The pretreated sewage is discharged into the closed zone through the inlet pipe, and the closed zone is a facultative and anaerobic reaction condition to realize primary purification of the sewage under the action of the diafiltration packing and the attached microorganism;

After the primary purification, the water flow rises into the plant purification column under the action of power or pressure difference, so as to realize the intermediate purification of the sewage through the environment of the plant root zone and the action of microorganisms;

The intermediate purified water flows into the reclamation area, and the final stage of sewage purification is realized under the environmental action of the filter layer, the soil layer and the herb root zone and the aerobic reaction condition, and the water purified by the final stage is discharged from the outlet pipe.

The utility model relates to a sewage treatment system, which solves the technical problem that the soil percolation cell body in the related art is disadvantageous for regulation, inconvenient use and limited application.

A sewage treatment system comprising a sewage treatment device as described above.

Optionally, at least two of said sewage treatment devices are connected by conduit in at least one of series and parallel.

The sewage treatment device proposed by the present disclosure can greatly enhance the sewage treatment effect of the soil percolation method, thereby reducing the facility floor space required for the unit treatment amount, and the effect of nitrogen and phosphorus removal can be significantly improved. Improve the economics, applicability and effectiveness of sewage soil infiltration treatment technology.

The sewage treatment system proposed by the present disclosure can adjust the number of plant purification columns of each sewage treatment device, and can also adjust the quantity of sewage treatment devices; the sewage treatment devices can be connected in series or in parallel to form an integrated facility with rated treatment capacity. . In addition, according to the special needs of sewage treatment, it can also be combined with other different treatment processes to form a composite sewage treatment facility.

DRAWINGS

1 is a schematic structural view of a sewage treatment apparatus according to an embodiment;

2 is a top plan view of a sewage treatment apparatus according to an embodiment;

3 is a partial cross-sectional structural view of a plant purification column of a sewage treatment device according to an embodiment;

4 is a schematic view showing a partial explosion structure of a plant purification column of a sewage treatment device according to an embodiment;

FIG. 5 is a schematic structural view of a sewage treatment system according to an embodiment.

In the picture:

1. Sewage treatment device; 2. Pipeline;

11. Containing body; 12, partition; 13, cofferdam area; 14, closed area; 15, plant purification column; 16, cloth pipe; 17, water pipe; 18, inlet pipe;

131, filter layer; 132, soil layer; 133, herbaceous plants; 134, net material;

141, diafiltration filler;

151, aquatic plants; 152, pipe body; 153, cluster root core; 154, water reversing ring; 155, flexible aeration pipe; 1521, water inlet hole; 1522, water outlet hole; 1541, through hole.

Detailed ways

As shown in FIG. 1 to FIG. 4, the present embodiment provides a sewage treatment device 1 which utilizes the synergistic action of soil percolation and plant root function to treat domestic sewage, including: a storage body 11, a partition 12 and a plant purification column 15.

The inside of the accommodating body 11 is an accommodating space that is open at the upper end, and the accommodating body 11 may be a soil structure or a tank body and a tank structure disposed underground, on the ground or overhead, where the accommodating body 11 is The shape and material are not limited; the housing 11 can be moved as needed, flexible in use, and wide in adaptability.

The partition 12 is located in the accommodating space and partitions the accommodating body 11 into the dam area 13 at the upper portion and the closed area 14 at the lower portion. The dam area 13 is above the partition 12, so that the upper end of the dam area 13 is open. The cofferdam area 13 is provided with a filter layer 131, a net material 134 and a soil layer 132 from bottom to top. The filter layer 131 is arranged with different materials and granular water seepage medium, and the net material 134 has a water permeability and a filtering function. In order to isolate the filter layer 131 and the soil layer 132, the soil layer 132 is planted with a regular green grass plant 133 with developed roots, moisture and cold resistance, and 133 roots of the herbaceous plant can penetrate into the soil layer 132 and then into the filter layer 131. The closed zone 14 is filled with a diafiltration packing 141 which can be assembled in combination with a plurality of diafiltration packings 141 of different shapes, materials and traits.

The receiving body 11 is provided with an inlet pipe 18 communicating with the closed area 14 and an outlet pipe 19 communicating with the cofferdam area 13. A water distribution pipe 16 is connected to the water inlet pipe 18 in the closed area 14. The water distribution pipe 16 is located at the bottom of the closed area 14. The water distribution pipe 16 is a branch structure composed of a main pipe and a branch pipe, and a plurality of water-permeable holes are opened in the branch pipe, and the water-permeable hole is opened. Intensive and even setting ensures that the water is fully even. In the cofferdam area 13 , a water collecting pipe 17 is disposed at the water outlet pipe 19, and the water collecting pipe 17 is located at the bottom of the cofferdam area 13. The water collecting pipe 17 is a branch structure composed of a main pipe and a branch pipe, and a plurality of water-permeable holes are opened in the branch pipe. The water permeable holes are densely and evenly arranged to ensure that the water inlet is sufficiently uniform.

A plurality of plant purification columns 15 are distributed over the partition 12, and the plant purification column 15 includes a tubular body 152 disposed to carry and grow the aquatic plants 151, the tubular bodies 152 extending through the partition 12 and communicating with the enclosed area 14 and the cofferdam area 13. The tubular body 152 is detachably mounted to the partition 12, and the number of the tubular bodies 152 can be set as needed. The upper port of the tubular body 152 is not lower than the soil layer 132, the lower port of the tubular body 152 is located in the diafiltration packing 141, and the plurality of aquatic plants 151 constitute a bundled root core 153, and the bundled root core 153 is filled with the lumen of the tubular body 152. . The rooting system of aquatic plants 151 is developed and can be reed, cattail or calamus.

The cluster root core 153 needs to be cultivated in advance, that is, the plant seedlings are planted in a special container, and the root development of the aquatic plants is regulated, so that the roots of the aquatic plants finally form bundles and dense columnar bodies, when the roots of the cluster cores 153 are bundled. After the density, the diameter, and the length are required, they are transplanted into the tube 152 to perform a purifying function; thereafter, the bundle root core 153 continues to extend downward along the axial direction of the tube 152. The aquatic plants 151 in the pipe body 152 need to be regularly trimmed and harvested, and the roots should be maintained in time to ensure a good growth environment and root distribution of the aquatic plants 151, and the cluster root core 153 is largely played. Ecological purification.

The pipe body 152 is provided with a water inlet hole 1521 communicating with the closed area 14 and a water outlet hole 1522 communicating with the bank area 13. The water inlet hole 1521 is located below the partition 12, and increases the contact area between the bundle root core 153 and the water in the closed area 14 to facilitate the flow of water into the tube body 152; the water outlet hole 1522 is located above the partition 12 and located in the filter layer 131. The water of the bundle root core 153 flows to the bank area 13.

A portion of the tubular body 152 located above the partition 12 is provided with a water reversing ring 154. The water reversing ring 154 defines a through hole 1541 corresponding to the water outlet hole 1522. The through hole 1541 and the water outlet hole 1522 are arranged one by one. The opening and closing of the water outlet hole 1522 can be controlled by rotating the water outlet reversing ring 154. When the through hole 1541 is displaced from the water outlet hole 1522 and the water outlet hole 1522 is closed, the water outlet of the pipe body 152 overflows from the upper port and then flows down and then infiltrates in the cofferdam area 13 to allow the sewage to enter the cofferdam area 13 to increase. Oxygen to promote aerobic reaction; when the through hole 1541 coincides with the water outlet hole 1522 and the water outlet hole 1522 is opened, the effluent of the pipe body 152 directly enters the filter layer 131 through the through hole 1541, and is suitable for winter operation of the facility in the northern region, Avoid effluent icing.

The inside of the pipe body 152 is provided with a flexible aeration pipe 155, and the lower end of the flexible aeration pipe 155 is inserted into the bundle root core 153, and the upper end of the flexible aeration pipe 155 is connected with the air pump, and the external gas can be charged into the bundle root core 153. In order to increase the oxygen inside the cluster root core 153, improve the reoxygenation environment and growth conditions of the 151 root zone of aquatic plants, and improve the ecological purification effect, especially the nitrogen and phosphorus removal rate.

As set above, the planar arrangement above the cofferdam area 13 is mainly composed of aquatic plants 151 and herbaceous plants 133, both of which can grow normally in spring, summer and autumn, and can also perform ecological treatment functions similar to constructed wetlands, Create a good vegetation ecological landscape. Although the upper leaves of the aquatic plants 151 in the northern part of the winter are withered, the root zone environment still maintains a certain ecological role. Therefore, by adopting auxiliary measures, the adverse effects of climatic conditions on the treatment effect of the facilities can be avoided. At the same time, because the soil layer 132 is planted with perennial evergreen grasses 133 with developed roots, moisture and cold resistance, such as ryegrass, along the grass and wheat winter grass, the ecological effects in winter can be maintained, and the evergreen habits are still compensated. The aquatic plants 151 withered adverse effects on winter landscape.

A sewage treatment method using the above sewage treatment device for sewage treatment, comprising:

The pretreated sewage flows into the closed water zone 16 through the inlet pipe 18 into the water distribution pipe 16, and the pollutants in the water are subjected to physical, chemical and microbial processes under the conditions of the diafiltration packing 141 and the attached microorganisms and the anaerobic and anaerobic reaction conditions. Filtration, adsorption, precipitation and degradation to achieve primary purification of wastewater.

The primary purified water flow rises into the plant purification column 15 under the action of power or pressure difference, and the cluster root core 153 in the pipe body 152 constitutes an active aquatic plant root zone environment, and further hydropatch pollutants through physical, plant and microbial processes. Absorption, adsorption, enrichment and decomposition, to achieve intermediate purification of sewage.

The intermediate purification water of the plant purification column 15 overflows from the upper port of the pipe body 152 and flows into the cofferdam zone 13 under the environmental action and aerobic reaction conditions of the filter layer 131, the soil layer 132, and the 133 root zone of the herbaceous plant. The absorption, adsorption and degradation of pollutants in the water through physical, microbial and plant processes are carried out to achieve the final purification of the sewage; the water purified by the final stage has reached the standard, and the water collection pipe 17 is discharged from the outlet pipe 19.

Through the three-stage purification of sewage, and the completion of anaerobic, facultative and aerobic reaction processes, the plant purification column 15 constitutes the active aquatic plant root zone environment, so that the soil infiltration sewage treatment facilities have been completed. The “soil-plant-microbial” ecological purification system, especially the developed and bundled aquatic plant roots, is directly involved in the sewage purification process. Under the synergistic effect of soil percolation and plant roots, the soil infiltration method can make the sewage treatment effect large. In order to strengthen, the facility footprint required for unit throughput can be reduced, and the effect of nitrogen and phosphorus removal can be significantly improved, thereby improving the economics, applicability and effectiveness of sewage soil infiltration treatment technology.

As shown in FIG. 5, the present embodiment further provides a sewage treatment system, which solves the technical problem that the soil percolation cell body in the related art is disadvantageous in regulation, inconvenient use, and limited application. Including the above-described sewage treatment device 1, the number of the sewage treatment devices 1 may be set according to the actual sewage treatment amount, and may be one or plural. At least two sewage treatment devices 1 can be connected by conduit 2 using at least one of series and parallel. Parallel mode can increase the sewage treatment capacity of the facility, while the series mode can improve the sewage treatment effect, so this method has strong flexibility and applicability.

The size of the receiving body 11 can be set according to the amount of sewage treatment, and a corresponding number of plant purification columns 15 can be disposed on a large receiving body 11 to form an integrated facility with a rated throughput or a plurality of single units. The accommodating bodies 11 are assembled and combined to form a complete set of facilities having a rated sewage treatment capacity. In addition, according to the special needs of sewage treatment, it can also be combined with other different treatment processes to form a composite sewage treatment facility.

In the present embodiment, four single accommodating bodies 11 are used, and two or two are connected in parallel and then connected in series to form a set of secondary sewage treatment facilities, and each of the accommodating bodies 11 is provided with two rows of a total of ten plant purification columns. The pretreated sewage enters the inlet pipe 18 of the two receiving bodies 11 at the same time, and the outlet pipe 19 of each of the receiving bodies 11 is connected to the inlet pipe 18 of the next receiving body 11, thereby performing sewage treatment. Secondary depth processing.

Industrial applicability

The sewage treatment device, the treatment method and the treatment system of the present disclosure solve the outstanding problem that the soil percolation method in the related art has a large occupation area, the ecological effect of the plant root system is limited, and the nitrogen and phosphorus removal effect is poor.

Claims (11)

1. A sewage treatment device comprising:

   The receiving body (11) has an inner receiving space for the upper end;

   a partition (12) located in the accommodating space and partitioning the accommodating body (11) into a dam area (13) at an upper portion and a closed area (14) at a lower portion, the accommodating body ( 11) an upper inlet pipe (18) communicating with the closed zone (14) and an outlet pipe (19) communicating with the cofferdam zone (13), the filter zone (13) being provided with a filter material a layer (131) and a soil layer (132) on the filter layer (131), the soil layer (132) being configured to grow a herbaceous plant (133), the closed zone (14) being filled with a percolating filler (141);

   a plurality of plant purification columns (15), the plurality of plant purification columns (15) being distributed on the partition (12), the plurality of plant purification columns (15) comprising arranged to carry and plant aquatic plants (151) a tubular body (152) that extends through the partition (12) and communicates the enclosed area (14) and the dam region (13).
2. The sewage treatment apparatus according to claim 1, wherein said pipe body (152) is detachably mounted on said partition plate (12), and said upper port of said pipe body (152) is not lower than said soil layer (132), a lower port of the tubular body (152) is located in the diafiltration packing (141), and a lumen of the tubular body (152) is disposed as a bundle composed of a plurality of the aquatic plants (151) The root core (153) is full.
3. The sewage treatment apparatus according to claim 2, wherein said pipe body (152) is provided with a water inlet hole (1521) communicating with said closed area (14) and communicating with said bank area (13) Outlet hole (1522).
4. The sewage treatment device according to claim 3, wherein the upper portion of the tubular body (152) is rotatably provided with a water reversing ring (154), and the water reversing ring (154) is opened and provided with the effluent The through hole (1541) corresponding to the hole (1522) can control the opening and closing of the water outlet hole (1522) by rotating the water outlet reversing ring (154).
5. The sewage treatment apparatus according to claim 2, wherein a inside of the pipe body (152) is provided with a flexible aeration pipe (155), and a lower end of the flexible aeration pipe (155) is disposed to be inserted into the cluster root system A core (153), the upper end of the flexible aeration tube (155) is connected to the air pump.
6. The sewage treatment apparatus according to claim 1, wherein a mesh material (134) is disposed between the filter layer (131) and the soil layer (132).
7. The sewage treatment device according to claim 1, wherein a water distribution pipe (16) is connected to the water inlet pipe (18) in the closed area (14), and the water distribution pipe (16) is located in the closed area. At the bottom of (14), the water distribution pipe (16) is a branch structure composed of a main pipe and a branch pipe, and the branch pipe is provided with a plurality of water-permeable holes.
8. The sewage treatment apparatus according to claim 1, wherein a water collecting pipe (17) is connected to the water outlet pipe (19) in the cofferdam area (13), and the water collecting pipe (17) is located in the surrounding water pipe (19). At the bottom of the crotch region (13), the water collecting pipe (17) is a branch structure composed of a main pipe and a branch pipe, and a plurality of water permeable holes are opened in the branch pipe.
9. A sewage treatment method applied to the sewage treatment apparatus according to any one of claims 1-8, comprising:

   The pretreated sewage is discharged into the closed zone (14) through the inlet pipe (18), and the closed zone (14) is a facultative and anaerobic reaction condition to realize the sewage under the action of the diafiltration packing (141) and the attached microorganisms. Primary purification;

   The primary purified water flow rises into the plant purification column (15) under the action of power or differential pressure to achieve intermediate purification of the sewage through the environment of the plant root zone and the action of microorganisms;

   The intermediate purified water flows into the reclamation area (13), and the final purification of the sewage is realized under the environmental action of the filter layer (131), the soil layer (132), and the root zone of the herb (133) and the aerobic reaction conditions. The water purified by the final stage flows out of the outlet pipe (19).
10. A sewage treatment system comprising: the sewage treatment device (1) according to any one of claims 1-8.
11. A sewage treatment system according to claim 10, wherein at least two of said sewage treatment devices (1) are connected by means of at least one of a series connection and a parallel connection through a conduit (2).

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