A sulfur autotrophic filling enhanced denitrification artificial wetland

Abstract

The utility model discloses a kind of sulphur autotrophy fillings' reinforced denitrification artificial wetlands, including main body filler unit and modular frame, the main body filler unit includes water inlet section, core processing section and effluent section, the water inlet section, core processing section and effluent section are all set to three-layer structure, the modular frame includes the side plate installed in wetland interior and the internal cross frame for supporting side plate, the side plate upper surface fixed mounting has lifting ring with it.The sulphur autotrophy fillings' reinforced denitrification artificial wetlands, adopt novel structure design, realize the efficient degradation and conversion of pollutant by multilayer composite filler, especially efficient denitrification and phosphorus removal, wetland whole is divided into water inlet section, core processing section and effluent section three parts, each section filler module adopts "three-layer composite structure", from top to bottom for the removal process of pollutant is functionally zoned, realize the synergistic effect of physical filtration, chemical regulation, biological denitrification and phosphorus removal.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an enhanced denitrification constructed wetland using sulfur autotrophic filler. Background Technology

[0002] Constructed wetlands, as an ecological wastewater treatment technology, have advantages such as low construction and operation costs, simple maintenance, and environmental friendliness. They are widely used in the treatment of rural domestic sewage, river replenishment, and landscape water bodies.

[0003] In the prior art, Chinese Patent Application No. CN202110529338.6 discloses an artificial wetland system, including a base, a support platform, a floating wetland purification unit, and a lifting mechanism. The base is fixed to the riverbank of a river, the support platform extends in a direction perpendicular to the base, and one end of the support platform is fixed to the side of the base away from the riverbank. The floating wetland purification unit is hinged or rotatably connected to the end of the support platform away from the base, and is used to purify the sewage diverted to the floating wetland purification unit. One end of the lifting mechanism is located on the side of the base away from the river, and the other end is hinged to the floating wetland purification unit, and is used to drive the floating wetland purification unit to rise relative to the base when the river is being discharged, so that the floating wetland purification unit is located above the river water to avoid interfering with the river's discharge.

[0004] Based on the above information, it can be seen that existing constructed wetlands generally achieve wastewater treatment through filtration. However, in actual use, traditional constructed wetlands often suffer from limited denitrification processes and low nitrogen removal efficiency when treating wastewater with low carbon-to-nitrogen ratios (C / N) due to insufficient carbon sources. Utility Model Content

[0005] The purpose of this invention is to provide an enhanced denitrification constructed wetland with sulfur autotrophic filler to solve the problem of low denitrification efficiency mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an enhanced denitrification constructed wetland using sulfur autotrophic filler, comprising a main filler unit and a modular frame. The main filler unit includes an inlet section, a core treatment section, and an outlet section, all of which are configured as three-layer structures. The modular frame includes side plates installed inside the wetland and an internal cross frame for supporting the side plates. Lifting rings are fixedly installed on the upper surface of the side plates, and four corner reinforcing columns are fixedly installed at the four corners of the internal cross frame. The side plates have matrix-distributed water passage holes inside, and the modular frame is configured as an assembly structure via a docking mechanism.

[0007] Preferably, the upper and lower layers of the water inlet section are gravel layers, and the middle layer of the water inlet section is a water inlet filter layer of zeolite and limestone.

[0008] Preferably, the upper and lower layers of the core processing section are gravel layers, and the middle layer of the core processing section is a core filter layer consisting of modified pyrite, porous ceramsite, and siderite.

[0009] Preferably, the upper and lower layers of the water outlet section are gravel layers, and the middle layer of the water outlet section is a volcanic rock water filtration layer.

[0010] Preferably, the docking mechanism includes a side-connecting slot and a side-connecting insert fixedly installed on the outer surface of the inner cross frame.

[0011] Preferably, the side connector slot corresponds to the side connector strip in position, and the side connector slot and the side connector strip are engaged and connected.

[0012] Preferably, the upper surface of the four corner reinforcing columns is provided with a reserved groove, and the lower surface of the four corner reinforcing columns is fixedly installed with a bottom extension column, and the bottom extension column and the reserved groove form an insertion and engagement structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the enhanced denitrification constructed wetland with sulfur self-growth filler adopts a novel structural design, the specific details of which are as follows:

[0014] 1. Through multi-layered composite packing, the efficient degradation and transformation of pollutants are achieved, especially efficient nitrogen and phosphorus removal. The wetland is divided into three parts: inlet section, core treatment section and outlet section. Each section's packing module adopts a "three-layer composite structure". Functional zoning is carried out from top to bottom for the pollutant removal process, realizing the synergistic effect of physical filtration, chemical regulation and biological nitrogen and phosphorus removal.

[0015] Furthermore, the inlet section bears the important responsibility of transitioning from the water distribution pipe to the packing area and performing preliminary filtration. Sufficient length ensures that the water flow enters the entire cross-section evenly and confines large particulate pollutants in this area, protecting the core area from rapid blockage. At the same time, the main packing material, zeolite + limestone, can adsorb high concentrations of ammonium ions in the water and neutralize any acidity that the inlet water may have or pre-add alkalinity for the upcoming acid production reaction through the rapid dissolution of limestone.

[0016] Furthermore, the core treatment section is the concentrated reaction zone of the wetland system. In this section, the influent water quality has become stable, and the microbial community is in its most active and balanced state, carrying out continuous and efficient core nitrogen and phosphorus removal reactions.

[0017] Furthermore, the outlet end mainly serves to collect water, perform fine filtration, and stabilize the quantity and quality of the effluent. It is also the final gatekeeper for the effluent from the wetland system.

[0018] 2. The modular frame design uses 100cm*100cm*20cm PVC (polyvinyl chloride) standard modular permeable baskets. The main frame of the frame uses 40mm×40mm industrial-grade PVC profiles. The frame is internally reinforced with "cross reinforcement" to effectively support the weight of the filler. The side panels and bottom plate use 8mm thick PVC grating with 8mm mesh size. The grating is embedded in the pre-set slots of the frame and fixed with PVC pressure strips and stainless steel screws with waterproof gaskets to ensure sealing and firmness. In addition, four high-strength lifting rings are prefabricated at the four corners of the top frame for hoisting when replacing filler modules later. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall layout of this utility model;

[0020] Figure 2 This is a schematic diagram of the water inlet section structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the core processing section structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the water outlet section structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the overall frame structure of this utility model;

[0024] Figure 6 This is a top view of the structure of this utility model;

[0025] Figure 7 This is a front view structural diagram of the present invention;

[0026] Figure 8 This is a schematic diagram of the overall assembly structure of this utility model.

[0027] In the diagram: A. Inlet section; B. Core treatment section; C. Outlet section; a. Gravel layer; b. Inlet filter layer; c. Core filter layer; d. Outlet filter layer; 1. Side plate; 101. Water passage hole; 2. Internal cross frame; 3. Four corner reinforcing columns; 4. Side connection slot; 5. Side connection strip; 6. Reserved groove; 7. Bottom extension column; 8. Lifting ring. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1: Please refer to Figures 1-4 This embodiment provides the following technical solution, specifically disclosing: a main packing unit and a modular frame. The main packing unit includes an inlet section A, a core treatment section B, and an outlet section C. The inlet section A, core treatment section B, and outlet section C are all configured with a three-layer structure. The upper and lower layers of the inlet section A are gravel layers a, and the middle layer of the inlet section A is an inlet filter layer b composed of zeolite and limestone. The upper and lower layers of the core treatment section B are gravel layers a, and the middle layer of the core treatment section B is a core filter layer c composed of modified pyrite, porous ceramsite, and siderite. The upper and lower layers of the outlet section C are gravel layers a, and the middle layer of the outlet section C is an outlet filter layer d composed of volcanic rock.

[0030] Wetland type: Suitable for horizontal subsurface flow wetlands

[0031] Main packing unit setup: The packing unit is divided into three parts: inlet section A, core treatment section B, and outlet section C. Each section of the packing module adopts a "three-layer composite structure". Functional zoning is carried out from top to bottom for the removal of pollutants, so as to achieve the synergistic effect of physical filtration, chemical regulation, and biological denitrification and phosphorus removal.

[0032] Inlet section A packing design

[0033] Inlet section A serves as the transition and initial filtration point between the distribution pipe and the packing area. Its sufficient length ensures uniform water flow throughout the entire cross-section, confining large particulate pollutants within this area and preventing rapid clogging of the core zone. Simultaneously, the main packing material, zeolite and limestone, adsorbs high concentrations of ammonium ions in the water. The rapid dissolution of limestone neutralizes any inherent acidity in the inlet water or pre-adds alkalinity for any impending acidification reaction. The packing material design for inlet section A is as follows:

[0034] The upper layer of filler is selected from gravel with a particle size of 25mm-50mm, and the thickness is determined according to the hydraulic load.

[0035] The intermediate layer filler is selected from zeolite and limestone with a particle size of 25mm-50mm, mixed in a volume ratio of 7:3, and the thickness is determined according to the hydraulic load.

[0036] The lower layer of filler material is selected from gravel with a particle size of 25mm-50mm, and the thickness is determined according to the hydraulic load.

[0037] Core processing section B packing design

[0038] Core treatment section B is the concentrated reaction zone of the wetland system. In this section, the influent water quality has stabilized, and the microbial community is in its most active and balanced state, carrying out continuous and efficient core nitrogen and phosphorus removal reactions. The packing material design for the core treatment section is as follows:

[0039] The upper layer of filler is selected from gravel with a particle size of 15mm-25mm, and the thickness is determined according to the hydraulic load.

[0040] The intermediate layer filler consists of modified pyrite, porous ceramsite, and siderite with a particle size of 10mm-15mm, mixed in a volume ratio of 55:30:15. The thickness is determined based on the hydraulic load.

[0041] The lower layer of filler is selected from gravel with a particle size of 15mm-25mm, and the thickness is determined according to the hydraulic load.

[0042] C-type packing design for water outlet section

[0043] The main function of effluent section C is to collect water, perform fine filtration, and stabilize the effluent flow and quality. It is also the final control unit for the wetland system's effluent. The packing material design for effluent section C is as follows:

[0044] The upper layer of filler is selected from gravel with a particle size of 15mm-25mm, and the thickness is determined according to the hydraulic load.

[0045] The intermediate layer filler is selected from volcanic rock with a particle size of 10mm-15mm, and the thickness is determined according to the hydraulic load.

[0046] The lower layer filler is selected from coarse-grained stones with a particle size of 15mm-25mm, and the thickness is determined according to the hydraulic load.

[0047] The design recommendations for the width (along the horizontal flow direction) of the above-mentioned inlet section A, core treatment section B, and outlet section C are as follows: the width of the inlet section A area is 10%-20%L, the width of the core treatment section B area is 70%-80%L, and the width of the outlet section C area is 10%-20%L (L is the total length of the wetland unit).

[0048] Example 2: Please refer to Figures 5-8 This embodiment provides the following technical solution, specifically disclosing that: the modular frame includes a side plate 1 installed inside the wetland and an internal cross frame 2 for supporting the side plate 1. A lifting ring 8 is fixedly installed on the upper surface of the side plate 1. Four corner reinforcing columns 3 are fixedly installed at the four corners of the internal cross frame 2. The side plate 1 has water passage holes 101 distributed in a matrix pattern inside. The modular frame is set as an assembly structure through a docking mechanism. The docking mechanism includes a side connection slot 4 and a side connection strip 5 fixedly installed on the outer surface of the internal cross frame 2. The side connection slot 4 and the side connection strip 5 are positioned correspondingly and are engaged with each other. The upper surface of the four corner reinforcing columns 3 is provided with a reserved groove 6, and the lower surface of the four corner reinforcing columns 3 is fixedly installed with a bottom extension column 7. The bottom extension column 7 and the reserved groove 6 form an insertion and engagement structure.

[0049] Frame design

[0050] The modular frame design uses 100cm*100cm*20cm PVC (polyvinyl chloride) standard module permeable baskets. The main frame of the frame is made of 40mm×40mm industrial-grade PVC profiles. The frame is internally reinforced with "cross reinforcement" to effectively support the weight of the filler. The side plates 1 and bottom plates are made of 8mm thick PVC grating. The water passage holes 101 are 8mm in size. The grating is embedded in the pre-set slots of the frame and fixed with PVC pressure strips and stainless steel screws with waterproof gaskets to ensure sealing and firmness. In addition, four high-strength lifting rings 8 are prefabricated at the four corners of the top frame for lifting when replacing the filler modules later.

[0051] Connection method of frame unit

[0052] The modular frame has 60mm*60mm*10mm support grooves on the top surface of the main frame at its four corners, and the frame column extends 10mm from the bottom area of ​​the four corner frames. This design can be used to achieve the positioning and connection of the upper and lower modular frames.

[0053] The horizontal connection of the modular frame also adopts the form of slot pull-out connection. Slots and inserts are prefabricated on the middle column of the four side panels to connect the frame left and right and front and back, making it a whole. This method is highly efficient and can form a stable overall matrix.

[0054] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An enhanced denitrification constructed wetland using sulfur-autotrophic filler, comprising a main filler unit and a modular frame, characterized in that, Also includes: The main packing unit includes an inlet section (A), a core treatment section (B), and an outlet section (C), all of which are configured as three-layer structures. The modular frame includes a side plate (1) installed inside the wetland and an internal cross frame (2) for supporting the side plate (1). A lifting ring (8) is fixedly installed on the upper surface of the side plate (1). Four corner reinforcing columns (3) are fixedly installed at the four corners of the internal cross frame (2). The side plate (1) has water passage holes (101) distributed in a matrix. The modular frame is set as an assembly structure through a docking mechanism.

2. The enhanced denitrification constructed wetland with sulfur self-trophic filler according to claim 1, characterized in that: The water inlet section (A) has two gravel layers (a) on the top and bottom, and the middle layer of the water inlet section (A) is a water inlet filter layer (b) consisting of zeolite and limestone.

3. The enhanced denitrification constructed wetland with sulfur self-trophic filler according to claim 1, characterized in that: The core processing section (B) consists of two gravel layers (a) on the top and bottom, and a core filter layer (c) consisting of modified pyrite, porous ceramsite, and siderite in the middle.

4. The enhanced denitrification constructed wetland with sulfur self-trophic filler according to claim 1, characterized in that: The upper and lower layers of the water outlet section (C) are gravel layers (a), and the middle layer of the water outlet section (C) is a volcanic rock water filtration layer (d).

5. The enhanced denitrification constructed wetland with sulfur self-growth filler according to claim 1, characterized in that: The docking mechanism includes a side-connecting slot (4) and a side-connecting insert (5) fixedly installed on the outer surface of the inner cross frame (2).

6. The enhanced denitrification constructed wetland with sulfur self-growth filler according to claim 5, characterized in that: The side slot (4) corresponds to the side insert (5) and the side slot (4) and the side insert (5) are engaged and connected.

7. The enhanced denitrification constructed wetland with sulfur self-growth filler according to claim 6, characterized in that: The upper surface of the four corner reinforcement column (3) is provided with a reserved groove (6), and the lower surface of the four corner reinforcement column (3) is fixedly installed with a bottom extension column (7), and the bottom extension column (7) and the reserved groove (6) form an insertion and engagement structure.

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