CN207192930U - A kind of device that black-odor riverway is administered using intensive aeration artificial swamp coupling technique dystopy - Google Patents

Abstract

The utility model discloses a device for controlling black and odorous rivers in different positions by using intensive aeration-artificial wetland coupling technology, which belongs to the field of sewage treatment. The device includes a pretreatment device and a coupling device, wherein the coupling device is respectively a plant layer, a filter material area and a supporting layer from top to bottom. The pretreated sewage flows into the device from the upper part, and then the water is discharged from the outlet at the bottom; a certain density of emergent plants is planted in the plant layer; the filter material area is divided into upper and lower parts, and a glass wool layer is added in the middle. Several aeration pipes are inserted into the upper filter material area, and several exhaust pipes with holes in the lower part are evenly distributed in the device, leading directly to the lower filter material area, so as to generate gas discharge. The utility model couples two technologies of aeration and artificial wetland, and has the advantages of remarkable treatment effect, simple operation, low construction cost and no secondary pollution.

Description

An off-site treatment of black and odorous rivers using intensive aeration-constructed wetland coupling technology installation

technical field

The utility model belongs to the field of sewage treatment, and more specifically relates to a device for ex-situ treatment of black and odorous river courses by using intensive aeration-artificial wetland coupling technology.

Background technique

Due to the long-term external source pollution input of urban rivers, especially important external source pollution such as rainy day overflow in the confluence system, mixed rain and sewage in the diversion system, and polluted runoff in the initial stage of rainfall, the substrate habitat deteriorates, the ecosystem degrades, and the pollution cannot be completed. The output, transfer and purification of pollutants lead to serious accumulation of pollutants and a vicious cycle, deterioration of water quality and black odor phenomenon. At the same time, due to the long-term stagnation of urban rivers, a large amount of sediment containing organic matter and nitrogen also forms endogenous pollution, which further aggravates the deterioration of the water quality of urban rivers and seriously affects the urban ecological civilization and the healthy life of residents.

Constructed wetland is a commonly used ecological technology, mainly an artificially constructed and controllable system, which is designed to treat wastewater through an optimized combination of physical, chemical and biological effects in the natural wetland ecosystem. At present, constructed wetlands have been widely used in the engineering practice of controlling black and odorous rivers, but the long-term operation of existing constructed wetlands has poor economic benefits and low removal efficiency, and the removal effect on ammonia nitrogen and total nitrogen in rivers is not significant.

The Chinese invention patent 201610557612.X published on September 28, 2016 discloses an aerated artificial wetland. The invention includes a water delivery device, an aerobic treatment tank, an anoxic denitrification tank, and an aeration and reoxygenation tank. The aerobic treatment tank is connected with the water delivery device, and the water delivery device transports the black and odorous water in the river to the aerobic treatment tank, and the anoxic denitrification tank is connected with the water delivery device and the aerobic treatment tank, and the aerobic treatment tank The treated black and odorous water overflows to the anoxic denitrification tank. The water delivery device transports the black and odorous water in the river to the anoxic denitrification tank to supplement the carbon source. The aeration and reoxygenation tank is connected to the anoxic denitrification tank. The black and odorous water treated in the anoxic denitrification tank overflows to the aeration and reoxygenation tank. The aerated artificial wetland can economically and effectively treat the black and odorous water body, so that the treated water can reach the standard of Class IV or Class V in the "Environmental Quality Standards for Surface Water". Its disadvantages are: the constructed wetland is divided into multi-level treatment, occupies a large area, has high construction costs and complicated management steps.

The Chinese patent 201520864486.3 with the publication date of March 23, 2016 discloses a self-cleaning micro-aeration composite constructed wetland sewage treatment system, which includes sequentially connected pretreatment structures connected by pipelines, self-cleaning micro-aeration vertical Sewage treatment device for baffled wetland, ANAMMOX denitrification type lateral subsurface flow constructed wetland sewage treatment device and biological observation pond. The sewage treatment system of this utility model has high treatment efficiency, can adapt to different water quality changes, and has good denitrification effect. The self-cleaning artificial wetland is not easy to be blocked, can be backwashed, and the effluent quality is stable, ensuring the long-term stable operation of the wetland system. Its shortcoming is that the device is composed of multi-level unit wetlands with different processing functions in sequence, the management is very complicated, and the land occupation is large, and the construction cost is high.

The Chinese invention patent 201610082097.4 published on June 1, 2016 discloses a coupling device between an adsorption aeration filter and a constructed wetland-ecological pond, which includes a concentration pond, a WAR reactor, a heat exchanger, a PACT pond, Ammonia nitrogen aerated biological adsorption filter, sewage return pool, sewage denitrification pool, deep phosphorus adsorption filter, artificial wetland and ecological pond are connected in sequence. Among them, the PACT pool is used to convert organic pollutants in water into carbon dioxide and water, convert ammonia nitrogen into nitrate nitrogen, and solidify and precipitate heavy metal ions; the ammonia nitrogen aerated biological adsorption tank is used to treat ammonia nitrogen, and the sewage adsorbed by ammonia nitrogen is treated. Aeration is used to oxidize ammonia nitrogen to nitrate nitrogen, and then it is discharged into the sewage return tank; the sewage denitrification tank is used to denitrify nitrate nitrogen and organic pollutants in sewage, and then remove nitrate nitrogen in sewage. The invention can effectively remove organic matter and nitrogen and phosphorus compounds in sewage, and better realize resource reuse. Its disadvantages are: the device has cumbersome processing steps, difficult management, easy blockage, large floor area and high cost.

The Chinese utility model patent 200920114602.4 with the publication date of December 30, 2009 discloses a non-powered integrated artificial wetland sewage treatment system, which is characterized in that the vertical flow sewage ecological purification tank is divided into upper and lower partitions, and the pre-treated living The sewage is lifted by the pump or enters the water distribution system depending on the height difference of the natural liquid level. The pretreated sewage is evenly distributed on the nitrification area of the vertical submerged ecological purification tank through the cross water distribution system, and then vertically infiltrated into the nitrification area and the artificial denitrification area in turn. Substratum layer, water distribution system implements intermittent water distribution to the ecological purification tank, and a non-powered water distribution system is installed at the bottom and inside of the upper nitrification area to realize continuous reoxygenation of the nitrification area, and the effluent from the upper nitrification area directly enters the lower denitrification area. The lower denitrification area is equipped with a water collection and discharge system. The water collection port is located below the denitrification area, and the water outlet is located above the denitrification area to maintain a certain water level in the denitrification area. This utility model can realize natural reoxygenation without power in wetlands, occupies a small area, and integrates nitrification and denitrification for efficient denitrification. Management is complex.

The Chinese invention patent 201410002615.8 published on April 9, 2014 discloses an intermittently operated vertical flow artificial wetland oxygenation and denitrification system, which includes an automatic oxygenation system connected to the main water inlet through a water pump. The system includes a spray distribution pipe with an atomizing nozzle connected to the water pump. The spray distribution pipe is horizontally installed above the vertical flow artificial wetland; the vertical flow artificial wetland is equipped with uniformly distributed vertically arranged porous aeration pipes and denitrification exhaust pipes. Air pipe; the bottom of the vertical flow constructed wetland is connected to the water outlet main pipe. The invention provides an oxygen-enriched environment for the nitrification area in the middle and upper part of the wetland through a group of porous air-filled pipes vertically inserted into the artificial wetland; the contact time and area between the water inlet and the atmosphere are increased through the spray distribution pipes, forming oxygen-enriched water inlet and enhancing the nitrification and desorption of the wetland. Nitrogen: By controlling the switch at the upper end of the denitrification exhaust pipe, the denitrification gas in the bottom denitrification area can be quickly discharged when water is ingested, which enhances the denitrification and denitrification of the wetland, and greatly improves the denitrification effect of the vertical flow constructed wetland. This invention has disadvantages, because the oxygen-enriched environment for nitrification and denitrification in the upper layer will seriously affect the anaerobic environment required for the denitrification reaction in the lower layer, thereby affecting the removal efficiency of nitrate nitrogen, and it is prone to blockage under long-term use.

Contents of the invention

1. The problem to be solved

Aiming at the problem that the existing artificial wetland technology for treating black and odorous rivers has unsatisfactory removal effect of ammonia nitrogen in the river and occupies a large area, the utility model provides a method of using intensive aeration-constructed wetland coupling technology for ex-situ treatment of black and odorous The river channel device improves the oxygen transfer efficiency, occupies a small area, and has a more efficient treatment effect on black and odorous river channels.

2. Technical solution

In order to solve the above problems, the technical scheme adopted in the utility model is as follows:

A device for ex-situ treatment of black and odorous rivers using intensive aeration-constructed wetland coupling technology, including a pretreatment device and a coupling device for aeration and constructed wetland, and the coupling device includes a plant layer, a filter material layer and a supporting layer , the pretreated sewage flows into the coupling device from the upper part through a peristaltic pump, and after treatment, the water is discharged from the outlet at the bottom of the coupling device, the plant layer is planted with emergent plants, and the filter material layer is divided into upper and lower layers. , respectively filled with fillers, and a glass wool layer is provided between the upper and lower layers.

Furthermore, the height of the upper layer of the filter material layer is 15-20 cm, and it is filled with stone materials with a particle size of 4-6 mm; the height of the lower layer of the filter material layer is 15-20 cm, and the stone material with a particle size of 10-15 mm Stones are used for filling, the height of the supporting layer is 10-15 cm, and stones with a particle size of 20-40 mm are used for filling.

Furthermore, the arrangement density of the aeration tubes in the coupling device is 40-60 pieces/m ² , the tube length is about 20-25 cm, the lower end of the aeration tubes is located on the upper layer of the filter material layer, and the aeration tubes The upper end of the air pipe is connected to the air pump, and the bottom of the aeration pipe is equipped with a 20-mesh stainless steel mesh to prevent fillers from entering the aeration pipe and causing blockage.

Furthermore, the distribution density of the exhaust pipes in the coupling device is 80-100/m ² , the length of the pipes is about 55-60 cm, the lower end of the exhaust pipes is located in the lower layer of the filter material layer, and the exhaust pipes The upper end of the exhaust pipe communicates with the atmosphere, and the lower part of the exhaust pipe has small holes.

Furthermore, there is still a 5cm water distribution area and a 3-4cm superelevation on the upper part of the coupling device.

Furthermore, the thickness of the glass wool layer is 1-3 cm.

3. Beneficial effect

Compared with the prior art, the beneficial effects of the utility model are:

(1) This utility model proposes an intensive device for coupling aeration and artificial wetland to control black and odorous rivers in different positions. The device adopts single-stage treatment, and the operation is very simple, which greatly reduces the area occupied by the treatment equipment and simplifies The process of using aeration and artificial wetland to treat sewage greatly reduces the management cost and construction cost in the process of treatment;

(2) The utility model intercepts the suspended matter outside the device through the combination of small-medium-large filter material distribution, effectively prevents the device from being blocked, and ensures the normal operation of the device;

(3) The utility model adds a glass wool layer in the upper and lower filter material intervals to effectively separate the nitrification area from the denitrification area, and aerates the upper part of the nitrification reaction through the aeration tube to make the upper nitrification reaction more complete. At the same time, the glass wool is used to effectively Prevent oxygen from entering the denitrification zone, provide a good anaerobic condition for the denitrification zone, and effectively increase the removal rate of N by about 30%;

(4) This patent is mainly used for the treatment of black and odorous rivers, which are generally sewage with high ammonia nitrogen and low dissolved oxygen. This utility model can effectively increase the dissolved oxygen content in sewage, remove the ammonia nitrogen content in sewage, and simultaneously Nitrate nitrogen also has a high removal rate. Using the device of the utility model, it can effectively eliminate black odor, and make the effluent reach the IV or V standard in the "Surface Water Environmental Quality Standards", and the selected materials are low in cost and easy to operate. , Low operating cost, economical and applicable, and has great promotion and application value.

Description of drawings

Fig. 1 is the device structure schematic diagram of the present utility model;

In the figure: 1-pretreatment device; 2-peristaltic pump; 3-glass wool layer; 4-lower filter layer; 5-exhaust pipe; 6-aeration pipe; 7-plant layer; 8-upper filter layer ; 9-support layer; 10-air pump.

Detailed ways

The utility model is further described below in conjunction with specific embodiments.

Comparative example 1

In this comparative example, an unimproved constructed wetland device is used to treat sewage near a black and odorous river pollution source. The support layer has a super height of 3cm on the top, and the height of the water distribution area is 5cm; the height of the upper filter material area is 20cm, and it is filled with stones with a particle size of 4-6mm; the height of the lower filter material area is 20cm. Stones with a particle size of 10-15mm are used for filling; the height of the supporting layer is 15cm, and stones with a particle size of 20-40mm are used for filling. Aeration pipes and exhaust pipes are added to this device, but in the upper filter material area and the lower layer There is no glass wool between the filter material areas.

The mode of operation of the device of this comparative example 1 is:

1) The sewage is discharged into the device from the upper part through the peristaltic pump, and the device starts the non-aeration stage;

2) After 5 days of non-aeration reaction, open the upper part of the aeration pipe, and turn on the air pump to aerate the device;

3) After 2 days of aeration, stop the aeration, tighten the upper part of the aeration pipe, and seal it;

4) After repeating the above steps 2) and 3) 6 times, the treated water is discharged from the water outlet at the bottom of the device;

The nitrogen pollution load of the influent in Comparative Example 1 is in the range of 30-40 gN/(m ² ·d), and the organic load is in the range of 500-600 mg/L.

The constructed wetland device in Comparative Example 1 was operated continuously for 3 months, and the quality of the effluent was monitored every week. The results are shown in Table 1.

Table 1 Comparative example 1 Influent and effluent water quality test indicators of sewage near a black and odorous river pollution source

Comparative example 2

The structure of the device of Comparative Example 2 is basically the same as that of Comparative Example 1, the only difference is that no aeration pipe and exhaust pipe are added in this device.

The operation method of the device of Comparative Example 2 is: discharge sewage into the device through a peristaltic pump, stop water intake when the highest water level is reached, the residence time of sewage in the device is consistent with that of Example 1, and then discharge the treated sewage Discharged from the water outlet at the bottom of the unit. The influent water quality of this Comparative Example 2 is the same as that of Comparative Example 1.

The constructed wetland device of Comparative Example 2 was operated continuously for 3 months, and the quality of the effluent was monitored every week. The results are shown in Table 2. Table 2 is compared with Table 1 of Comparative Example 1. It can be seen that the addition of aeration tubes in Comparative Example 1 promotes the nitrification reaction, and the removal rate of COD and NH ₃ -N is improved to a certain extent; but although Comparative Example 1 With the exhaust pipe installed, the NO ₃ ^- N removal rate decreased significantly, indicating that the ideal denitrification reaction did not occur, and the gas discharged from the upper aeration pipe entered the lower filter material area, which further inhibited the denitrification reaction. to make NO ₃ ^- N more difficult to remove.

Table 2 Comparative example 2 Influent and effluent water quality test indicators of sewage near a black and odorous river pollution source

Example 1

To treat sewage near a black and odorous river pollution source, this Example 1 proposes a device and method for using intensive aeration-constructed wetland coupling technology to treat black and odorous rivers in ectopic locations. As shown in Figure 1, the device mainly includes a pretreatment device 1 and an aeration-constructed wetland coupling device. The pretreated sewage is discharged from the top of the coupling device through a peristaltic pump 2. After a period of treatment, the treated water that meets the discharge standard is discharged back to the river from the water outlet at the bottom of the coupling device. In Example 1, the aeration-constructed wetland coupling device is a plexiglass cuboid with a length of 50 cm, a width of 20 cm, and a height of 65 cm.

The filter material area of the coupling device is divided into upper and lower layers, that is, the upper filter material layer 8 and the lower filter material layer 4 in Figure 1. Considering the small-medium-large filter material combination mode, the sewage treatment effect is the best. At the same time, it is also considered that the sewage with high pollution load needs a large number of microorganisms to be treated, so the filler with a large specific surface area, that is, a small particle size of the filling matrix is selected for filling. In this embodiment 1, the upper filter material layer 8 is filled with 4-5mm stones, the lower filter material layer 4 is filled with 10-12mm stones, and the supporting layer 9 is filled with 20-30mm stones to prevent the water outlet from being blocked. The height of the packing in the coupling device is 55cm, wherein the height of the upper filter material layer 8 is 20cm, the height of the lower filter material layer 4 is 20cm, and the height of the supporting layer 9 is 15cm, and the supporting layer 9 is used as a drainage layer. A 3cm glass wool layer 3 is arranged in the middle of the material layer, and a 5cm water distribution area and a 3cm superhigh are left on the top of the pipe.

Several aeration pipes 6 are arranged in the coupling device, and the bottom of the aeration pipe 6 should be placed on the upper part of the glass wool layer to ensure an anaerobic environment below the glass wool layer, so that the denitrification reaction in the coupling device can be carried out normally, and the aeration The upper end of the tube 6 is connected to an air pump 10 . In this example 1, the arrangement density of the aeration pipes 6 in the coupling device is 60 pieces/m ² , and 6 perforated PVC pipes with a diameter of Ф30 mm are evenly arranged as the aeration pipes 6, the aeration rate is 15 m ³ /min, and the total length It is 25cm, and the depth of burial is 15cm. It is located on the top of the glass wool layer 3, and the bottom of the aeration pipe 6 is provided with a 20-mesh stainless steel mesh.

Several exhaust pipes 5 are also arranged in the coupling device, which are buried deep to the bottom of the lower filter material layer 4, and small holes are arranged on the pipe wall at the lower part of the exhaust pipe 5 to facilitate the discharge of ammonia gas in the denitrification reaction. , to promote the denitrification reaction in the lower part of the device, and the upper end of the exhaust pipe 5 communicates with the atmosphere. In Example 1, the arrangement density of exhaust pipes 5 in the coupling device is 100/m ² , so 10 exhaust pipes 5 with a diameter of Ф10 mm are evenly distributed in the device, the total length is 60 cm, and the buried depth is 40 cm , the exhaust pipe 5 bottom 10cm place has aperture.

The influent water quality of the device of using the intensive aeration-constructed wetland coupling technology to treat black and odorous rivers in different positions in this embodiment 1 is consistent with that of comparative examples 1 and 2, that is, the nitrogen pollution load of the influent ranges from 30 to 40 gN/(m ² ·d), the organic loading range is 500-600 mg/L.

The method of using the device for ex-situ treatment of black and odorous rivers using intensive aeration-constructed wetland coupling technology described in Example 1, the steps are:

1) The collected black and odorous sewage is directly discharged into the pretreatment device 1, and the suspended solids and particulate matter are removed therein to prevent the device from clogging;

2) The pretreated sewage is discharged from the upper part into the coupling device through the peristaltic pump 2, and the coupling device starts the non-aeration stage;

3) After 5 days of non-aeration reaction, open the upper part of the aeration pipe 6, and turn on the air pump 10 to aerate the coupling device;

4) After 2 days of aeration, end the aeration, tighten the upper part of the aeration pipe 6, and seal it;

5) After repeating the above steps 3) and 4) 6 times, the treated water is discharged from the water outlet at the bottom of the coupling device;

6) Backwash the exhaust pipe 5 every week.

The aeration tube 6 needs to be kept in a sealed state during the normal operation of the constructed wetland to prevent the external oxygen from exchanging gas with the constructed wetland through the aeration tube 6, which will affect the normal operation of the constructed wetland. 6 upper seal. In the aeration stage, the upper part of the aeration pipe 6 needs to be opened, and the air pump 10 is used for aeration to ensure that the dissolved oxygen in the upper part of the wetland is greater than 2mg/L, thereby promoting the oxidation process of ammonia nitrogen. After the aeration system has been in operation for a period of time, Stop the aeration and tighten the sealing cap.

Continuously operated for 3 months, the effluent water quality of Example 1 was monitored every week, and the results are shown in Table 3. After the black and odorous sewage was treated by the device of Example 1, the total nitrogen and organic matter in the effluent water had a high removal effect , other water quality indicators also maintained a high removal rate; compared with the above two groups of comparative examples, the removal efficiency of various pollutants in the water of Example 1 was greatly improved. It can be seen that although the existing patent 201410002615.8 thought of simply dividing the device into upper and lower parts, with the intention of making the upper layer carry out nitrification reaction and the lower layer carry out denitrification reaction, the inventor of the patent did not realize the most critical problem, that is Nitrification and denitrification reactions cannot interact with each other. This key point seems simple, but it is hard to think of; in addition, glass wool is a commonly used thermal insulation and sound-absorbing material in the construction field, but it is difficult for those skilled in the art to think of applying it to environmental protection. field, the inventor of this patent accidentally discovered that glass wool used in sewage treatment equipment can not only make water pass through but also effectively prevent the oxygen in the nitrification zone from entering the lower denitrification zone, and glass wool can also play a good role in filtering water. The role of suspended solids may be due to the fact that the air bubbles discharged from the aeration pipe are difficult to pass through the glass wool layer under the barrier of the fluffy interlaced fibers inside the glass wool, and the gaps between the glass wool fibers can allow the sewage to pass smoothly, and the field of sewage treatment Commonly used barrier materials such as anti-seepage membrane, concrete, clay, etc. not only cut off the air, but also make it difficult for sewage to pass through, and its effect is far inferior to the glass wool layer of the present invention. At the same time, considering that glass wool has a certain air permeability, the aeration volume of the device needs to be adjusted according to the thickness of glass wool to ensure that the denitrification reaction in the lower part of the device is in a good anaerobic environment.

Table 3 In Example 1, the inflow and outflow water quality test indicators of sewage near a black and odorous river pollution source

Example 2

To treat the sewage at a distance of 50m from a certain black and odorous river pollution source, this Example 2 proposes a device and method for using intensive aeration-constructed wetland coupling technology to treat black and odorous rivers in ectopic locations. The device in embodiment 2 is basically the same as that in embodiment 1, except that in embodiment 2, the coupling device is a plexiglass cuboid with a length of 50 cm, a width of 20 cm, and a height of 55 cm.

The upper filter material layer 8 in this embodiment 2 is filled with 5-6 mm stone materials, the lower filter material layer 4 is filled with 12-14 mm stone materials, and the supporting layer 9 is filled with 30-35 mm stone materials. The height of the packing in the coupling device is 46cm, of which the height of the upper filter material layer 8 is 18cm, the height of the lower filter material layer 4 is 18cm, the height of the support layer 9 is 10cm, and a 2cm glass wool layer is arranged between the upper and lower filter material layers 3. There is a 5cm water distribution area and a 3cm superhigh at the top of the pipe.

In Example 2, the distribution density of the aeration pipes 6 in the coupling device is set to 50/m ² , and 5 Ф30mm perforated PVC pipes are evenly placed in the device as the aeration pipes 6, and the aeration volume is 12m ³ /min, the tube length is 23cm, the depth of burial is 13cm, and it is located on the top of the glass wool layer 3.

In this embodiment 2, the distribution density of exhaust pipes 5 in the coupling device is 90 pieces/m ² , and 9 exhaust pipes 5 with a diameter of 10 mm are evenly distributed in the device, with a total length of 58 cm and a buried depth of 38 cm. Exhaust pipe 5 bottom 10cm place has aperture.

The nitrogen pollution load of the influent water in Example 2 ranges from 25 to 30 gN/(m ² ·d), and the organic load ranges from 400 to 500 mg/L.

The method of using the device for ex-situ treatment of black and odorous rivers using intensive aeration-constructed wetland coupling technology described in Example 2, the steps are:

1) The collected black and odorous sewage is directly discharged into the pretreatment device 1 to remove suspended solids and particulate matter in the sewage and prevent the device from clogging;

2) The pretreated sewage is discharged from the upper part into the coupling device through the peristaltic pump 2, and the coupling device starts the non-aeration stage;

3) After non-aeration lasts for 3 days, open the upper part of the aeration pipe 6, and turn on the air pump 10 to aerate the coupling device to ensure that the dissolved amount in the upper part of the wetland is greater than 2 mg/L;

4) After 1.5 days of aeration, the aeration is terminated, and the upper part of the aeration pipe 6 is tightened and sealed;

5) After repeating the above steps 3) and 4) 5 times, the treated water is discharged from the water outlet at the bottom of the coupling device;

6) Backwash the exhaust pipe every week.

The system has been running continuously for 2 months, and the effluent quality is monitored every 5 days. The results are shown in Table 4. After the black and odorous sewage is treated, the total nitrogen and organic matter in the effluent have a high removal effect, and other water quality indicators are also high. Maintained a high removal rate.

In Table 4 Example 2, the sewage inlet and outlet water quality test index situation of 50m away from the pollution source

Example 3

To treat sewage at a distance of 100m from a certain black and odorous river pollution source, this Example 3 proposes a device and method for ex-situ treatment of black and odorous rivers using intensive aeration-constructed wetland coupling technology. The device in Example 3 is basically the same as that in Example 1, except that in Example 3, the aeration-constructed wetland coupling device is a plexiglass cuboid with a length of 50 cm, a width of 20 cm, and a height of 48 cm.

The upper filter material layer 8 in this embodiment 3 is filled with 5-6 mm stone materials, the lower filter material layer 4 is filled with 13-15 mm stone materials, and the supporting layer 9 is filled with 35-40 mm stone materials. The height of the upper filter material layer 8 in the coupling device is 15cm, the height of the lower filter material layer 4 is 15cm, the height of the supporting layer 9 is 12cm, and a glass wool layer 3 of 1cm is arranged in the middle of the upper and lower filter material layers. There is a water distribution area of 5cm and a super height of 4cm.

In Example 3, the distribution density of the aeration pipes 6 in the coupling device is set to 40/m ² , and 4 perforated PVC pipes with a diameter of Ф30 mm are evenly placed in the device as the aeration pipes 6, and the aeration volume is 10 m ³ /min, the pipe length is 20cm, the depth of burial is 10cm, and it is located at the top of the glass wool layer 3.

In Example 3, the distribution density of the exhaust pipes 5 in the coupling device is 80/m ² , 8 exhaust pipes 5 with a diameter of Ф10 mm are evenly distributed in the device, the total length is 55 cm, and the buried depth is 35 cm. Exhaust pipe 5 bottom 10cm place has aperture.

The nitrogen pollution load of the influent water in Example 3 ranges from 20 to 25 gN/(m ² ·d), and the organic load ranges from 300 to 400 mg/L.

The method for using the device for ex-situ treatment of black and odorous rivers using intensive aeration-constructed wetland coupling technology described in Example 3, the steps are:

1) In order to avoid device blockage, at first the collected black and odorous sewage is discharged into the pretreatment device 1;

2) The pretreated sewage is discharged from the upper part into the coupling device through the peristaltic pump 2, and the coupling device starts the non-aeration stage;

3) After the non-aeration lasts for 2 days, open the upper part of the aeration pipe 6, and turn on the air pump 10 to aerate the coupling device;

4) After aeration for 1 day, the aeration is terminated, and the upper part of the aeration pipe 6 is tightened and sealed;

5) After repeating the above steps 3) and 4) 5 times, the treated water is discharged from the water outlet at the bottom of the coupling device;

6) Backwash the exhaust pipe 5 every week.

The system has been running continuously for 2 months, and the quality of the effluent water is monitored every 5 days. The results are shown in Table 5. After the black and odorous sewage is treated, the total nitrogen and organic matter in the effluent have a high removal effect, and other water quality indicators are also high. Maintained a high removal rate.

In Table 5 Example 3, the water quality test index situation of the sewage inlet and outlet water 100m away from the pollution source.

Claims (7)

1. a kind of device that black-odor riverway is administered using intensive aeration-artificial swamp coupling technique dystopy, including pretreatment dress (1) and the coupling device of aeration and artificial swamp are put, the top of described pretreatment unit (1) and coupling device passes through pipeline Connection, the coupling device include layer of plants (7), upper strata filter material layer (8), lower floor's filter material layer (4) and held successively from top to bottom Layer (9) is held in the palm, upper strata filter material layer (8) and lower floor's filter material layer (4) fill filler respectively, and the layer of plants (7) plants emergent aquactic plant, institute To state and some aeration tubes (6) are evenly arranged in coupling device, the lower end of the aeration tube (6) is located in upper strata filter material layer (8), on End is connected with air pump (10), it is characterised in that is provided with mineral wool between described upper strata filter material layer (8) and lower floor's filter material layer (4) Layer (3).

2. one kind according to claim 1 administers black-odor riverway using intensive aeration-artificial swamp coupling technique dystopy Device, it is characterised in that the height of the upper strata filter material layer (8) is 15~20cm, using 4~6mm of particle diameter building stones carry out Filling, the height of lower floor's filter material layer (4) is 15~20cm, is filled using 10~15mm of particle diameter building stones.

3. one kind according to claim 1 administers black-odor riverway using intensive aeration-artificial swamp coupling technique dystopy Device, it is characterised in that the height of the supporting layer (9) is 10~15cm, is filled out using 20~40mm of particle diameter building stones Fill.

4. one kind according to claim 1 administers black-odor riverway using intensive aeration-artificial swamp coupling technique dystopy Device, it is characterised in that the arrangement density of the aeration tube (6) is 40~60/m², pipe range is 20~25cm, the exposure Tracheae (6) bottom is provided with the stainless (steel) wire of 20 mesh.

5. one kind according to claim 1 administers black-odor riverway using intensive aeration-artificial swamp coupling technique dystopy Device, it is characterised in that 80~100/m is also uniformly distributed in the coupling device²Blast pipe (5), the blast pipe (5) lower end is located in lower floor's filter material layer (4), and upper end communicates with air, and blast pipe (5) bottom is provided with aperture.

6. one kind according to claim 1 administers black-odor riverway using intensive aeration-artificial swamp coupling technique dystopy Device, it is characterised in that also leave 5cm water distribution area and 3~4cm superelevation in the top of the coupling device.

7. one kind according to claim 1 administers black-odor riverway using intensive aeration-artificial swamp coupling technique dystopy Device, it is characterised in that the thickness of the mineral wool layer (3) is 1~3cm.