Constructed wetland for sewage resourceful treatment

Abstract

The utility model discloses a sewage resourceful treatment constructed wetland, which belongs to the field of sewage treatment, and comprises a frame body, a support frame, a plurality of water distribution modules, a water distribution pipe, a viable bacteria layer and a drainage layer, the top of the frame body is provided with the support frame, the top of the support frame is detachably provided with a plurality of water distribution modules, and the drainage layer is provided with a plurality of water distribution pipes. The water distribution end of the water distribution pipe is located on the upper portion of the water distribution module, a viable bacteria layer and a drainage layer are arranged in the frame body, the viable bacteria layer is located below the water distribution module and located above the drainage layer, and the water distribution module is filled with a filter material with the particle size being 0.5-3 mm. According to the sewage resourceful treatment constructed wetland disclosed by the utility model, the arrangement that the water distribution pipe is combined with the water distribution module is adopted, coarse water distribution is performed through the water distribution pipe, secondary water distribution is performed through a small-particle-size filter material in the water distribution module, and sewage randomly drips onto a viable bacteria layer through the filter material, so that a capillary water distribution effect is achieved, and the water distribution is uniform; the treatment efficiency of system pollutants is improved.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment, and particularly relates to an artificial wetland for sewage resource treatment. Background Art

[0002] With the increasing improvement of the living standards in our country, the discharge of domestic sewage is increasing, which brings great pressure to the water environment. The problems of sewage treatment and utilization are becoming increasingly prominent. How to better combine sewage treatment with sewage resource utilization has become a hot issue in the current environmental protection field. Exploring an innovative model that combines sewage treatment with resource utilization can not only protect the environment, but also convert sewage into valuable resources for use in fields such as agriculture, industry, and urban greening, realizing the resource utilization of sewage.

[0003] At present, vertical subsurface flow constructed wetlands are widely used in sewage treatment in small towns and rural areas due to their advantages such as small land occupation area, high hydraulic load, good nitrogen and phosphorus removal effect, and low operation cost. However, the biggest problem in the long-term operation of current constructed wetlands is substrate clogging. Substrate clogging causes waterlogging on the surface layer of the wetland, resulting in hypoxia inside the wetland and losing its purification efficiency. When the constructed wetland is clogged, it is necessary to dig out the filler again, process it, and then backfill it. This treatment method is not only time-consuming and laborious, but also affects the normal use of the constructed wetland, and the sludge resources in the clogged substrate cannot be utilized, resulting in waste of resources. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an artificial wetland for sewage resource treatment to overcome at least one of the above defects in the prior art.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An artificial wetland for sewage resource treatment provided by the utility model includes a frame body, a support bracket, a water distribution module, a water distribution pipe, a live bacteria layer, and a drainage layer. A support bracket is arranged at the top of the frame body, and a plurality of water distribution modules are detachably placed on the top of the support bracket. The water distribution end of the water distribution pipe is located above the water distribution module. A live bacteria layer and a drainage layer are arranged inside the frame body. The live bacteria layer is located below the water distribution module and above the drainage layer. The inside of the water distribution module is filled with filter materials with a particle size of 0.5 - 3 mm.

[0007] Preferably, the water distribution module includes a water distribution basket and filter materials with a particle size of 0.5 - 3 mm filled inside it. The water distribution basket has water permeable holes, and the filling height of the filter materials in the water distribution basket is 25 - 35 cm.

[0008] Preferably, the material of the water distribution basket is polycarbonate.

[0009] Preferably, the live bacteria layer includes an upper bacteria layer and a lower bacteria layer, and the lower bacteria layer is arranged between the upper bacteria layer and the drainage layer.

[0010] Preferably, both the upper bacteria layer and the lower bacteria layer include a number of soft woven bags and filter media filled inside the soft woven bags. The particle size of the filter media in the upper bacteria layer is 5 - 10 mm, and the particle size of the filter media in the lower bacteria layer is 10 - 20 mm.

[0011] Preferably, the height of the live bacteria layer is 55 - 65 cm.

[0012] Preferably, the drainage layer includes a number of filter media with a particle size of 20 - 40 mm, and the height of the drainage layer is 15 - 25 cm.

[0013] Preferably, the filter media is an alkaline filter media.

[0014] Preferably, the alkaline filter media is a calcium-based denitrification and phosphorus removal filter media.

[0015] Preferably, the frame body includes a steel frame and a number of polypropylene plates installed on the steel frame.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. By adopting the setting of the water distribution pipe combined with the water distribution module for dual water distribution, the wastewater is roughly distributed through the water distribution pipe and then distributed to each water distribution module. The secondary water distribution is carried out through the filter media with a small particle size in the water distribution module, and the sewage randomly drips onto the live bacteria layer through the filter media, playing a role of capillary water distribution, making the water distribution uniform and improving the treatment efficiency of system pollutants.

[0018] 2. The detachable placement of the water distribution module enables it to be removed and replaced when it is blocked, effectively and quickly restoring the normal operation of the constructed wetland.

[0019] 3. When the water distribution layer of the wetland is blocked, the water distribution module can be quickly replaced, which is convenient for replacement and can quickly and effectively restore the operation of the constructed wetland. The filter media in the blocked water distribution module is rich in organic matter and can be used as a substrate for soilless cultivation. It not only solves the blockage problem of the wetland but also realizes the resource utilization of sewage. It provides a constructed wetland for recycling sewage resource treatment, realizes the virtuous cycle of sewage treatment and resource utilization, and opens up a new path for environmental sustainable development.

[0020] 4. The use of soft woven bags avoids uneven flow and short-circuit flow.

[0021] 5. After the constructed wetland starts to operate with water inflow, aerobic ammonia-oxidizing bacteria (AOB bacteria) in the live bacteria layer gradually enrich, and the filter media in the live bacteria layer is filled with highly active aerobic ammonia-oxidizing bacteria. As the wetland operates, carrier-containing filter media can be continuously produced, also realizing the resource utilization of sewage.

[0022] 6. Alkaline filter media has its own alkalinity, and the ammonia oxidation process is a process of lowering pH. Alkaline filter media can supplement alkalinity and maintain the pH balance of the system.

[0023] 7. Use alkaline filter media loaded with ammonia oxidizing bacteria in combination with other filter media to act as an inoculation, which can enable the new wetland to start up quickly, exert its effectiveness, and improve sewage treatment efficiency.

[0024] 8. The frame made of steel frame and polypropylene board is not only strong but also reduces cost.

[0025] 9. The modularization of artificial wetlands and fillers can be assembled and designed into models and specifications of various sizes according to actual sewage treatment needs. It is also convenient for construction and can save labor costs.

[0026] 10. Artificial wetlands occupy a small area, have high hydraulic load, good nitrogen and phosphorus removal effects, are easy to manage and operate, have low operating costs, and have a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model.

[0028] Figure 2 It is a schematic diagram of the structure of the water distribution basket of the utility model when viewed from above.

[0029] Figure 3 It is a schematic diagram of the matching structure of the soft woven bag and the filter material of the utility model.

[0030] Figure 4 It is a right view structural schematic diagram of the frame of the utility model.

[0031] The markings in the accompanying drawings are: 1-frame, 2-support frame, 3-water distribution module, 4-water distribution pipe, 5-live bacteria layer, 6-drainage layer, 31-water distribution basket, 7-filter material, 32-water permeable hole, 51-upper bacteria layer, 52-lower bacteria layer, 53-soft woven bag, 11-steel frame, 12-polypropylene board. DETAILED DESCRIPTION

[0032] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0033] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0034] As Figures 1 to 4 shown, an artificial wetland for sewage resource treatment provided in this embodiment includes a frame body 1, a support bracket 2, a water distribution module 3, a water distribution pipe 4, a live bacteria layer 5, and a drainage layer 6. A support bracket 2 is provided at the top of the frame body 1, and a plurality of water distribution modules 3 are detachably placed on the top of the support bracket 2. The water distribution end of the water distribution pipe 4 is located above the water distribution module 3. In this embodiment, the water distribution pipe is fixed to the support bracket. A live bacteria layer 5 and a drainage layer 6 are provided inside the frame body 1. The live bacteria layer 5 is located below the water distribution module 3 and above the drainage layer 6. The inside of the water distribution module 3 is filled with filter media 7 with a particle size of 0.5 - 3 mm. The bottom of the water distribution end of the water distribution pipe 4 is evenly perforated, and the wastewater is distributed into the water distribution module 3 through the perforation openings. By combining the water distribution pipe 4 with the water distribution module 3, double water distribution is carried out. Coarse water distribution is carried out through the water distribution pipe 4 to distribute the wastewater to each water distribution module 3, and secondary water distribution is carried out through the filter media 7 with a small particle size in the water distribution module 3. The sewage randomly drips onto the live bacteria layer 5 through the filter media 7, playing a role of capillary water distribution, making the water distribution uniform and improving the treatment efficiency of system pollutants. And the water distribution pipe 4 can adopt large perforations and does not need to adopt a water distribution pipe 4 with small perforations. The water distribution pipe 4 with large perforations only conducts coarse water distribution, and the subsequent water distribution uniformity is realized by the filter media 7 in the water distribution module 3.

[0035] Among them, the water distribution module 3 includes a water distribution basket 31 and filter media 7 with a particle size of 0.5 - 3 mm filled inside. The water distribution basket 31 has water permeable holes 32, and the material of the water distribution basket 31 is polycarbonate. The wastewater evenly distributed through the filter media 7 with a particle size of 0.5 - 3 mm is discharged through the water permeable holes 32. The size of the water distribution basket 31 is 700 mm * 600 mm * 400 mm. The main substances blocking the vertical flow constructed wetland include two categories: inorganic substances and organic substances. In the vertical flow constructed wetland, the serious blockage of the voids in the filter media 7 matrix gradually decreases with the increase of the matrix depth. The matrix deposition mainly occurs at the 10 cm - 30 cm depth of the constructed wetland, and the sediment content accumulates to more than 80%. The content of the blocking substances gradually decreases below 30 cm and accounts for a very small proportion. The blockage of the vertical flow constructed wetland mainly occurs in the water distribution layer. Based on the above, the filling height of the filter media 7 in the water distribution basket 31 of the present utility model is set to 30 cm. The water distribution module 3 can be detachably placed. When the water distribution module 3 is blocked, it can be removed and replaced, effectively and quickly restoring the normal operation of the constructed wetland. The filter media 7 in the blocked water distribution module 3 is rich in organic matter, nitrogen, phosphorus and other substances, and can be used as a substrate for soilless cultivation, thus realizing the resource utilization of sewage.

[0036] Among them, the height of the live bacteria layer 5 is 60 cm, and the height of the drainage layer 6 is 25 cm. The drainage layer 6 includes a number of filter media 7 with a particle size of 20 - 40 mm. The live bacteria layer 5 includes an upper bacteria layer 51 and a lower bacteria layer 52, and the lower bacteria layer 52 is arranged between the upper bacteria layer 51 and the drainage layer 6. Both the upper bacteria layer 51 and the lower bacteria layer 52 include a number of soft woven bags 53 and filter media 7 filled inside the soft woven bags 53. The particle size of the filter media 7 in the upper bacteria layer 51 is 5 - 10 mm, and the particle size of the filter media 7 in the lower bacteria layer 52 is 10 - 20 mm. Place the drawstrings of the soft woven bags well for convenient hoisting and replacement later. In order to avoid uneven flow and short circuit flow, soft woven bags 53 are used. After the constructed wetland starts to operate with water inflow, aerobic ammonia-oxidizing bacteria (AOB bacteria) in the live bacteria layer 5 gradually become enriched. The filter media 7 in the live bacteria layer 5 is filled with highly active aerobic ammonia-oxidizing bacteria. As the wetland operates, carrier bacteria filter media 7 can be continuously produced, also realizing the resource utilization of sewage.

[0037] Among them, the filter media 7 is alkaline filter media 7. The alkaline filter media 7 has its own alkalinity, and the ammonia oxidation process is a process of pH reduction. The alkaline filter media 7 can supplement alkalinity and maintain the pH balance of the system. The alkaline filter media 7 uses calcium-based denitrifying and phosphorus-removing filter media 7 which is easy for microorganisms to attach and grow. Using the alkaline filter media 7 loaded with ammonia-oxidizing bacteria in combination with other filter media 7 plays an inoculation role, enabling the new wetland to start quickly, exert its efficacy, and improve the sewage treatment efficiency.

[0038] Among them, the frame body 1 includes a steel frame 11 and a number of polypropylene plates 12 (PP plates) installed on the steel frame 11. The frame body 1 formed by combining the steel frame 11 and the polypropylene plates 12 not only has strength but also reduces costs.

[0039] After the pilot-scale artificial wetland for sewage resource treatment operates stably, samples are taken every 3 days at a surface loading rate of 1 m 3 / (m 2 ·d). The experimental results are shown in Table 1:

[0040] Table 1 Experimental data of the stable operation of the artificial wetland for sewage resource treatment

[0041]

[0042] The artificial wetland modularization and filler modularization of the present utility model can be assembled and designed into various size models according to the actual sewage treatment requirements, and it is convenient for construction, which can save labor costs. The artificial wetland has a small footprint, a high hydraulic loading rate, good nitrogen and phosphorus removal effects, convenient management and operation, low operating costs, and a long service life. When the water distribution layer of the wetland is blocked, the water distribution module can be quickly replaced, which is convenient for replacement and can quickly and effectively restore the operation of the artificial wetland. The filter material in the blocked water distribution module is rich in organic matter and can be used as a substrate for soilless cultivation. It not only solves the problem of wetland blockage but also realizes the utilization of sewage resources. It provides an artificial wetland for sewage resource treatment that can be recycled, realizes the virtuous cycle of sewage treatment and resource utilization, and opens up a new path for environmental sustainable development. It makes the water distribution of the artificial wetland uniform, ensures the sewage treatment efficiency, solves the problem of wetland blockage, and at the same time makes full use of the sludge resources in the sewage to realize the utilization of sewage resources.

[0043] The above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that; they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A wastewater resource treatment artificial wetland, characterized by: It includes a frame, a support frame, a water distribution module, a water distribution pipe, a living bacteria layer, and a drainage layer; A support frame is provided on the top of the frame, and a plurality of water distribution modules are detachably placed on the top of the support frame, and the water distribution end of the water distribution pipe is located on the upper part of the water distribution module; A live bacteria layer and a drainage layer are arranged inside the frame, wherein the live bacteria layer is located below the water distribution module and above the drainage layer; The interior of the water distribution module is filled with filter material with a particle size of 0.5-3 mm.

2. The artificial wetland for wastewater resource treatment according to claim 1 is characterized by: The water distribution module includes a water distribution basket and a filter material with a particle size of 0.5-3 mm filled therein; The water distribution basket has water permeable holes; The filling height of the filter material in the water distribution basket is 25-35 cm.

3. The artificial wetland for wastewater resource treatment according to claim 2 is characterized in that: The material of the water distribution basket is polycarbonate.

4. The artificial wetland for wastewater resource treatment according to claim 1, characterized in that: The live bacteria layer includes an upper bacteria layer and a lower bacteria layer; The lower bacteria layer is arranged between the upper bacteria layer and the drainage layer.

5. The artificial wetland for wastewater resource treatment according to claim 4 is characterized in that: The upper bacterial layer and the lower bacterial layer both include a plurality of soft woven bags and filter materials filled in the soft woven bags; The particle size of the filter material of the upper bacterial layer is 5-10 mm; The particle size of the filter material of the lower bacteria layer is 10-20 mm.

6. The artificial wetland for wastewater resource treatment according to claim 4 is characterized by: The height of the live bacteria layer is 55-65 cm.

7. The artificial wetland for wastewater resource treatment according to claim 4 is characterized by: The drainage layer includes a plurality of filter materials with a particle size of 20-40 mm; The height of the drainage layer is 15-25 cm.

8. The artificial wetland for wastewater resource treatment according to claim 7, characterized in that: The filter material is an alkaline filter material.

9. The artificial wetland for wastewater resource treatment according to claim 8, characterized in that: The alkaline filter material is a calcium-based denitrification and dephosphorization filter material.

10. The artificial wetland for wastewater resource treatment according to claim 1, characterized in that: The frame includes a steel frame and a plurality of polypropylene plates installed on the steel frame.

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