Oxidation pond system for river and lake first rain outlet treatment

Abstract

The utility model provides an oxidation pond system for river and lake first rain discharge port treatment. The oxidation pond system comprises an ultra-nano gas-dissolved reoxygenation unit 1 for black removal and deodorization, a biological purification unit 2 for degrading ammonia nitrogen, a submerged plant unit 3 for purifying water, a soft and hard enclosure for separating the three functional units, and a control system. The system specifically solves the problem of key pollutants such as black and odorous substances, ammonia nitrogen and the like in initial rainwater through a triple purification mechanism of ultra-nano gas dissolution and reoxygenation, biological purification and submerged plants, remarkably improves the water quality, ensures effective isolation and cooperative work of all functional units through a scientific soft and hard enclosure design, and improves the water quality. The overall treatment efficiency is improved, and an innovative, efficient and eco-friendly solution is provided for pollution treatment of the river and lake first rain discharge port.

Description

Technical Field

[0001] The utility model relates to the technical field of water environment treatment, in particular to an oxidation pond system used for treating initial rain outlets of rivers and lakes. Background Art

[0002] River and lake initial rain outlets are important channels for urban rainwater discharge. During the rainy season, a large amount of surface runoff carrying various pollutants quickly gathers to form initial rainwater. This type of rainwater usually has a high pollutant load, including suspended particulate matter, organic matter, nutrients (such as ammonia nitrogen), etc. After being discharged into rivers and lakes, it not only causes water turbidity to increase and transparency to decrease, but also causes serious black and smelly water phenomena, seriously threatening the stability of the water ecological environment and biodiversity. In addition, excessive ammonia nitrogen content not only directly inhibits the survival of aquatic organisms, but also aggravates eutrophication of water bodies and induces problems such as blue algae blooms.

[0003] At present, although the treatment technology for the initial rainwater outlets of rivers and lakes has been developed, the following deficiencies are generally present: first, the treatment facilities have limited effect on the removal of black and odorous substances in the initial rainwater, and cannot effectively improve the redox potential of the water body, resulting in the difficulty in curing the black and odorous phenomenon; second, the degradation means for ammonia nitrogen are single, the treatment efficiency is not high, and its concentration in the water body cannot be reduced quickly; third, while treating the initial rainwater, the existing technology often ignores the restoration and protection of the entire water ecosystem, and lacks a comprehensive and systematic treatment strategy.

[0004] The utility model patent with publication number CN214270376U provides an ecological purification system for the mixed flow outlet of rainwater and sewage in urban lakes. The system includes an anti-scouring area, a garbage collection area, a diversion purification area, an ecological reoxygenation area and a landscape beautification area; the end of the diversion purification area is the ecological reoxygenation area, the outside of the diversion purification area is the landscape beautification area, the diversion purification area is provided with an anti-scouring area, wherein the anti-scouring area includes the urban mixed flow outlet of rainwater and sewage, an anti-scouring cover, and a stone paving, the garbage collection area is provided with a permeable soft enclosure, the diversion purification area includes an ecological bag retaining wall, carbon grass, pine wood piles, and a gravel bed; the ecological reoxygenation area includes a fountain aerator, an ecological floating island, and submerged plants; the landscape beautification area is provided with an emergent plant belt.

[0005] The utility model patent with publication number CN207294351U provides a system for purifying polluted urban inner lake water and restoring water ecology. The system includes: a rainwater and sewage pretreatment purification unit, which is set at the riverside rainwater outlet or the mixed sewage overflow outlet of the river channel entering the lake; a micro-topography water ecology construction unit in the lake, which includes constructing a shallow water submerged plant restoration area, a gentle slope transition area, and a deep water storage area in sequence from the lake shore to the center of the lake; submerged plants are planted in the submerged plant restoration area; a live water circulation and enhanced purification unit, in which a circulating water pump is arranged in the center of the lake or the deep water storage area, and the circulating pipeline is laid on the bottom of the lake; and an enhanced purification system is set in the water circulation passage.

[0006] However, the above system has technical problems such as the reduction of overflow pollution and high-concentration sewage, the rapid elimination of black and smelly problems, and the efficient degradation of toxic and harmful substances such as H2S, mercaptans, and nitrites.

[0007] Therefore, there is an urgent need to develop a new type of river and lake initial rainwater outlet management technology that can effectively eliminate black and odor, significantly reduce ammonia nitrogen content, and take into account water ecological restoration, so as to cope with the increasingly severe challenges of initial rainwater pollution and achieve continuous improvement of river and lake water quality and restoration of ecological balance. Utility Model Content

[0008] The utility model aims to provide an oxidation pond system for treating the initial rain outlets of rivers and lakes.

[0009] In order to achieve the above-mentioned utility model purpose, the utility model provides an oxidation pond system for treating the initial rain outlet of rivers and lakes, comprising an ultra-nano gas-dissolving reoxygenation unit for removing black and deodorizing, a biological purification unit for degrading ammonia nitrogen, a submerged plant unit for purifying water quality, and soft and hard enclosures for separating the above three functional units;

[0010] The soft and hard enclosures include soft enclosures and hard enclosures;

[0011] The soft enclosure includes a first soft enclosure surrounding the ultra-nano gas-dissolved reoxygenation unit and the biological purification unit, and a second soft enclosure surrounding the biological purification unit and the submerged plant purification unit;

[0012] The hard enclosure is used to separate the ultra-nano aerosol reoxygenation unit and the submerged plant unit.

[0013] As a further improvement of the present invention, the ultra-nano aerosol reoxygenation unit is provided with a water inlet, a water outlet and an air intake device; the water inlet receives initial rainwater, the water outlet discharges oxygen-rich water after reoxygenation treatment, and the air intake device is connected to a pure oxygen delivery device.

[0014] As a further improvement of the utility model, the biological purification unit is composed of an ecological floating island and artificial aquatic plants.

[0015] As a further improvement of the utility model, the artificial aquatic plants are made of carbon fiber and are suspended on the ecological floating island.

[0016] As a further improvement of the utility model, the submerged plant unit adopts Hydrilla verticillata.

[0017] As a further improvement of the present invention, the soft enclosure is made of 80-mesh water-permeable enclosure cloth, and the hard enclosure is made of PVC material.

[0018] As a further improvement of the utility model, the soft enclosure is fixedly arranged on the pool bottom and / or the pool wall; the soft enclosure has appropriate water permeability to prevent water short circuit while allowing water microcirculation.

[0019] As a further improvement of the utility model, the bottom of the hard enclosure is embedded in the pool bottom, and the top is higher than the water surface.

[0020] As a further improvement of the utility model, a flow control valve and an oxygen concentration monitoring instrument are provided on the air intake pipeline of the air intake device of the ultra-nano gas dissolution reoxygenation unit.

[0021] As a further improvement of the present invention, the oxidation pond system also includes a control system; the control system is electrically connected to the water inlet, water outlet, air intake device, flow control valve, oxygen concentration monitoring instrument, plant growth monitoring equipment of the ecological floating island and water quality monitoring equipment.

[0022] As a further improvement of the utility model, the water inlet of the ultra-nano gas-dissolved reoxygenation unit is the raw water flowing into the ultra-nano reoxygenation unit from initial rain, and the water outlet is located in the same unit.

[0023] As a further improvement of the present invention, the ecological floating islands are evenly arranged in the biological purification unit at a certain interval.

[0024] As a further improvement of the utility model, the artificial aquatic plants are suspended under the ecological floating island according to the designed density.

[0025] As a further improvement of the present invention, in the submerged plant unit, the planting density and distribution pattern of Hydrilla verticillata are optimally designed based on factors such as water flow rate and light conditions.

[0026] As a further improvement of the present invention, the hard enclosure is arranged at the boundary of each functional unit.

[0027] The oxidation pond system aims to achieve deep purification and ecological restoration of initial rainwater through integrated and efficient unit design and coordinated operation, including the following technical innovations:

[0028] Reoxygenation and black removal technology integration: The ultra-nano gas-dissolved reoxygenation unit is used to achieve efficient reoxygenation treatment of initial rainwater by precisely controlling the coordinated work of the water inlet, water outlet and air intake device. The water inlet is connected to the initial rainwater to be treated, and the water outlet discharges oxygen-rich water that has been reoxygenated and rich in high-concentration dissolved oxygen, which significantly improves the redox potential of the water body and effectively eliminates the black and odor phenomenon. The air intake device introduces pure oxygen to ensure sufficient oxygen supply inside the oxidation pond reoxygenation unit, accelerate the oxidation reaction process, significantly improve the transparency of the water body, reduce the chemical oxygen demand (COD), and create favorable conditions for the subsequent biological purification unit.

[0029] Construction of ammonia nitrogen degradation system: The biological purification unit is composed of ecological floating islands and artificial water plants to achieve efficient removal of ammonia nitrogen. Plants such as irises with strong ammonia nitrogen adsorption and conversion capabilities are planted on the ecological floating islands. Artificial water plants are made of carbon fiber materials and hung on the ecological floating islands. They are the core of ammonia nitrogen degradation, which not only enhances the ammonia nitrogen absorption capacity, but also improves the biological purification efficiency per unit area, further reducing the ammonia nitrogen content in the water.

[0030] Submerged plant enhanced purification: The submerged plant unit uses Hydrilla verticillata as the main species and is placed at the end of the entire treatment process to deeply purify the water that has been treated in the first two stages. Hydrilla verticillata has excellent nitrogen and phosphorus absorption capacity and biological flocculation effect, which can further absorb residual ammonia nitrogen and other nutrients, while promoting the precipitation of suspended particles, effectively improving water clarity and ensuring that the effluent water quality meets the standards.

[0031] Scientific configuration of soft and hard enclosures: To ensure that each functional unit operates independently and works together efficiently, the utility model uses two types of soft and hard enclosure materials for reasonable partitioning. The soft enclosure uses 80-mesh permeable enclosure cloth, which not only maintains the necessary fluidity inside the water body, but also prevents interference between different units, ensuring the orderly progress of the treatment process. The hard enclosure is made of PVC material, which has good corrosion resistance and easy maintenance, providing a stable physical barrier for the system, ensuring the stability of the structure of each unit and long-term effective operation.

[0032] The beneficial effects of the utility model are:

[0033] The oxidation pond system for the treatment of initial rainwater outlets of rivers and lakes provided by the utility model specifically solves the problems of key pollutants such as black and odorous substances and ammonia nitrogen in the initial rainwater through the triple purification mechanism of ultra-nano aerosol reoxygenation, biological purification and submerged plants, and significantly improves the water quality. At the same time, through the scientific soft and hard enclosure design, it ensures the effective isolation and coordinated work of each functional unit, improves the overall treatment efficiency, and provides an innovative, efficient and eco-friendly solution for the pollution control of initial rainwater outlets of rivers and lakes. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1The utility model provides a schematic structural diagram of an oxidation pond system for managing initial rainwater outlets in rivers and lakes.

[0035] Figure 2 This is a schematic diagram of the structure of the ultra-nano gas-dissolved reoxygenation unit provided by the utility model.

[0036] Figure 3 A detailed diagram of the arrangement of the soft and hard enclosures provided by the utility model.

[0037] Reference numerals

[0038] 1-Ultra-nano aerosol reoxygenation unit; 2-Biological purification unit; 3-Submerged plant purification unit;

[0039] 11-water inlet; 12-water outlet; 13-air intake device;

[0040] 31-soft partition; 32-hard partition. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0043] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0044] See also Figures 1 to 3 As shown, the utility model provides an oxidation pond system for the treatment of initial rainwater outlets of rivers and lakes, including an ultra-nano aerosol reoxygenation unit 1 for removing black and odor, a biological purification unit 2 for degrading ammonia nitrogen, a submerged plant unit 3 for purifying water quality, soft and hard enclosures for separating the above three functional units, and a control system (not shown in the figure).

[0045] See also Figure 2 As shown, the ultra-nano aerosol reoxygenation unit 1 is provided with a water inlet 11, a water outlet 12 and an air intake device 13; the water inlet 11 receives initial rainwater, the water outlet 12 discharges oxygen-enriched water after reoxygenation treatment, and the air intake device 13 is connected to a pure oxygen delivery device.

[0046] Specifically, the water inlet 11 is located at the top of the ultra-nano aerosol reoxygenation unit 1 and is connected to the end of the external initial rainwater outlet to ensure that rainwater enters the treatment system smoothly. The water outlet 12 is provided at the bottom of the ultra-nano aerosol reoxygenation unit 1 to ensure that the oxygen-rich water after reoxygenation treatment is fully mixed in the ultra-nano aerosol reoxygenation unit 1 and enters the next unit with the water flow. The air intake device 13 is arranged on the side wall of the ultra-nano aerosol reoxygenation unit 1 and is connected to an external pure oxygen source through a pipeline to provide a stable oxygen supply to the interior of the ultra-nano aerosol reoxygenation unit 1.

[0047] In some specific embodiments, a flow control valve and an oxygen concentration monitoring instrument are provided on the air intake pipe of the air intake device 13 of the ultra-nano aerosol reoxygenation unit 1. The water inlet of the ultra-nano aerosol reoxygenation unit 1 is the raw water flowing into the ultra-nano reoxygenation unit from the initial rain, and the water outlet 12 is located in the same unit.

[0048] The biological purification unit is composed of an ecological floating island and artificial water plants. The artificial water plants are made of carbon fiber and are suspended on the ecological floating island.

[0049] Specifically, the ecological floating islands are evenly arranged in the biological purification unit at a certain interval, and the artificial aquatic plants are suspended under the ecological floating islands according to the designed density.

[0050] The submerged plant unit 3 uses Hydrilla verticillata. In the submerged plant unit 3, the planting density and distribution pattern of Hydrilla verticillata are optimized and designed according to factors such as water flow rate and light conditions.

[0051] See also Figure 3 As shown, the soft and hard enclosures include a soft enclosure 31 and a hard enclosure 32 .

[0052] The soft enclosure 31 includes a first soft enclosure surrounding the ultra-nano aerosol reoxygenation unit 1 and the biological purification unit 2, and a second soft enclosure surrounding the biological purification unit 2 and the submerged plant purification unit 3; the soft enclosure 31 allows water to flow while preventing interference between different units. The hard enclosure 32 is used to separate the ultra-nano aerosol reoxygenation unit 1 and the submerged plant unit 3.

[0053] In some specific embodiments, the soft enclosure 31 is made of 80-mesh water-permeable enclosure cloth, and the hard enclosure 32 is made of PVC material, which is sturdy and durable and is arranged at the boundary of each functional unit to ensure the overall structural stability of the system and the independence of the operation of each unit.

[0054] The soft enclosure 31 is fixed to the pool bottom and / or pool wall by fixing parts. The soft enclosure 31 should maintain appropriate water permeability to prevent water short circuit while allowing water microcirculation.

[0055] The bottom of the hard enclosure 32 is embedded in the pool bottom, and the top is higher than the water surface. The hard enclosure 32 is arranged at the boundary of each functional unit.

[0056] The control system is connected with the water inlet, water outlet, air intake device, flow control valve, oxygen concentration monitoring instrument, plant growth monitoring equipment of the ecological floating island and water quality monitoring equipment, etc., and is used to monitor the system operation status in real time and automatically adjust the operation parameters.

[0057] When implementing the oxidation pond system for treating the initial rainwater outlet of rivers and lakes provided by the utility model, the specific construction and installation are carried out according to the following steps:

[0058] 1) Construction of the ultra-nano gas-dissolving reoxygenation unit 1:

[0059] The water inlet 11: at the upstream end of the oxidation pond, the initial rainwater inlet pipeline is located and installed according to the design drawings to ensure seamless connection with the urban drainage network or the initial rainwater collection system. The water inlet pipeline should be equipped with corresponding control valves and flow meters to facilitate the adjustment of water inflow and monitoring of the treatment process.

[0060] The water outlet 12 is installed at the downstream end of the ultra-nano aerosol reoxygenation unit 1 according to the designed position, and is connected to the water inlet of the subsequent biological purification unit 2 to ensure a smooth transition of oxygen-enriched water. Valves and flow meters are also configured.

[0061] The air intake device 13 is connected to the pure oxygen delivery pipeline at a suitable position on the side of the ultra-nano gas dissolution reoxygenation unit 1 to ensure a stable gas supply. An oxygen concentration monitoring instrument is installed to monitor the gas dissolution effect in real time.

[0062] 2) Construction of the biological purification unit 2:

[0063] The ecological floating island: according to the design layout, the ecological floating island frame is fixed inside the biological purification unit 2, and aquatic plants such as irises with ammonia nitrogen degradation ability are planted thereon. Ensure that the floating islands are properly spaced, which is conducive to plant growth and does not hinder the smooth flow of water.

[0064] The artificial aquatic plants are made of carbon fiber materials and are suspended under the ecological floating island according to the designed density to ensure that they are in full contact with the water body and enhance the ammonia nitrogen adsorption and conversion effect.

[0065] 3) Arrangement of the submerged plant purification unit 3:

[0066] Hydrilla verticillata: In the submerged plant purification unit 3, Hydrilla verticillata is planted according to the designed density and distribution pattern. Ensure that it is evenly distributed in the water body and give full play to its absorption capacity for ammonia nitrogen and nutrients, as well as its flocculation effect on suspended particles.

[0067] 4) Setting of soft and hard enclosures:

[0068] The soft enclosure 31: uses 80 mesh permeable enclosure cloth, surrounds between the ultra-nano aerosol reoxygenation unit 1 and the biological purification unit 2, and between the biological purification unit 2 and the submerged plant purification unit 3, and is fixed to the pool bottom and pool wall by anchors to ensure that the enclosure cloth is tightly attached and does not hinder water flow. The soft enclosure 31 should maintain appropriate looseness to allow water microcirculation and prevent interference between units.

[0069] The hard enclosure 32 is made of PVC material and is made into a hard fence according to the design drawing size, and is respectively set at the boundary of each functional unit. The hard enclosure 32 should be firmly inserted into the bottom of the pool, with the top above the water surface, to ensure that the structure is stable and effectively isolate different units.

[0070] 5) System debugging and operation:

[0071] Equipment inspection: Check the installation of all pipelines, valves, instruments, gas sources and other equipment one by one to ensure there is no leakage, no blockage, and the equipment is operating normally.

[0072] 6) Water quality testing: Before, during and after the system is put into operation, regular sampling and testing of various water indicators (such as dissolved oxygen, ammonia nitrogen, COD, turbidity, etc.) are carried out to evaluate the system treatment effect, and the operating parameters are adjusted or the process is optimized according to the test results.

[0073] In summary, the utility model provides an oxidation pond system for the treatment of initial rainwater outlets of rivers and lakes, including an ultra-nano aerosol reoxygenation unit 1 for removing black and odor, a biological purification unit 2 for degrading ammonia nitrogen, a submerged plant unit 3 for purifying water quality, soft and hard enclosures for separating the above three functional units, and a control system. The system uses the triple purification mechanism of ultra-nano aerosol reoxygenation, biological purification and submerged plants to specifically solve the key pollutant problems such as black and odorous substances and ammonia nitrogen in the initial rainwater, significantly improving the water quality. At the same time, through the scientific design of soft and hard enclosures, it ensures the effective isolation and coordinated work of each functional unit, improves the overall treatment efficiency, and provides an innovative, efficient and eco-friendly solution for the pollution control of initial rainwater outlets of rivers and lakes.

[0074] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. An oxidation pond system for treating the initial rainwater discharge outlets of rivers and lakes, characterized in that: It includes an ultra-nano gas-dissolving reoxygenation unit for removing black and odor, a biological purification unit for degrading ammonia nitrogen, a submerged plant unit for purifying water quality, and soft and hard enclosures for separating the above three functional units; The soft and hard enclosures include soft enclosures and hard enclosures; The soft enclosure includes a first soft enclosure surrounding the ultra-nano gas-dissolved reoxygenation unit and the biological purification unit, and a second soft enclosure surrounding the biological purification unit and the submerged plant purification unit; The hard enclosure is used to separate the ultra-nano aerosol reoxygenation unit and the submerged plant unit.

2. The oxidation pond system for treating the initial rainwater outlet of rivers and lakes according to claim 1, characterized in that: The ultra-nano aerosol reoxygenation unit is provided with a water inlet, a water outlet and an air inlet device; the water inlet receives initial rainwater, the water outlet discharges oxygen-enriched water after reoxygenation treatment, and the air inlet device is connected to a pure oxygen delivery device.

3. The oxidation pond system for treating the initial rainwater outlet of rivers and lakes according to claim 1, characterized in that: The biological purification unit is composed of an ecological floating island and artificial aquatic plants.

4. The oxidation pond system for treating the initial rainwater outlet of rivers and lakes according to claim 3, characterized in that: The artificial aquatic plants are made of carbon fiber and are suspended on the ecological floating island.

5. The oxidation pond system for treating the initial rainwater outlet of rivers and lakes according to claim 1, characterized in that: The submerged plant unit adopts Hydrilla verticillata.

6. The oxidation pond system for treating the initial rainwater outlet of rivers and lakes according to claim 1, characterized in that: The soft enclosure is made of 80-mesh water-permeable enclosure cloth, and the hard enclosure is made of PVC material.

7. The oxidation pond system for treating the initial rainwater outlet of rivers and lakes according to claim 1, characterized in that: The soft enclosure is fixedly arranged on the pool bottom and / or the pool wall; the soft enclosure has appropriate water permeability to prevent water short circuit and allow water microcirculation.

8. The oxidation pond system for treating the initial rainwater outlet of rivers and lakes according to claim 1, characterized in that: The bottom of the hard enclosure is embedded in the pool bottom, and the top is higher than the water surface.

9. The oxidation pond system for treating the initial rainwater outlet of rivers and lakes according to claim 1, characterized in that: The air intake pipeline of the air intake device of the ultra-nano gas dissolution reoxygenation unit is provided with a flow control valve and an oxygen concentration monitoring instrument.

10. The oxidation pond system for treating the initial rainwater outlet of rivers and lakes according to claim 9, characterized in that: The oxidation pond system also includes a control system; the control system is electrically connected to a water inlet, a water outlet, an air intake device, a flow control valve, an oxygen concentration monitoring instrument, a plant growth monitoring device of the ecological floating island, and a water quality monitoring device.

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