CN211141659U - Ecological wetland system integrating mine wastewater treatment and plant residue treatment - Google Patents
Ecological wetland system integrating mine wastewater treatment and plant residue treatment Download PDFInfo
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- CN211141659U CN211141659U CN201922092425.0U CN201922092425U CN211141659U CN 211141659 U CN211141659 U CN 211141659U CN 201922092425 U CN201922092425 U CN 201922092425U CN 211141659 U CN211141659 U CN 211141659U
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Abstract
The utility model provides an ecological wetland system that ore deposit mountain waste water treatment and incomplete processing as an organic whole of planting belongs to sewage treatment technical field. The utility model discloses by heavy metal sedimentation system, plant incomplete processing system and constructed wetland clean system triplex. The artificial wetland device in the utility model is filled with the biochar layer and the gravel layer, can neutralize the water quality, improves the pH value of the wastewater, and is beneficial to the growth and enrichment of sulfate reducing bacteria; the plant fermentation liquor can provide a cheap and stable carbon source for sulfate reduction reaction; soluble sulfur ions in the backflow water can form stable precipitation with heavy metals, the toxic effect of the heavy metals on microorganisms is reduced, the heavy metals are prevented from being accumulated in the wetland to cause blockage, and sludge formed by precipitation can be recycled, so that the dual purposes of efficient purification and resource utilization of the acid mine wastewater can be achieved.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a method for treating acid mine wastewater by utilizing an artificial wetland added with plant fermentation liquor.
Background
Acid mine wastewater (AMD) refers to the particular acidic wastewater formed by exposure of sulphide ores to oxidizing conditions during mining operations, highway construction or other large scale excavation. Where ore mining and smelting are the main sources of such waste water. Such as mining, mineral processing and metallurgy, generate a large amount of sulfur-containing waste, which is disposed in tailings dams or impoundments, and through air and water exposure and microbial activity, the waste forms a mixture of sulfate, heavy metals and acids into water, soil and other environmental bodies. Heavy metals are easily enriched by organisms, enter human bodies along with food chains/nets after biological accumulation and amplification, and finally harm the ecological system and human health, so that the effective treatment of the acidic mine wastewater is very important.
The method for treating the acid mine wastewater by using the artificial wetland technology is an economic, ecological, friendly and convenient method, and mainly utilizes the synergistic effect among plant extraction, matrix adsorption and microbial reduction to achieve the aim of purifying the acid mine wastewater, particularly Sulfate Reducing Bacteria (SRB) can utilize an organic carbon source as an electron acceptor to reduce sulfate into sulfide to react with heavy metal in the mine wastewater to form stable sulfide precipitate, thereby achieving the effects of improving the pH of effluent and effectively reducing the concentrations of the heavy metal and the sulfate. Nevertheless, there is little available organic carbon source in the acid mine wastewater, and therefore, it is necessary to supply an external organic substance. The cost of the low-molecular carbon source is too high, and the low-molecular carbon source cannot be applied in a large scale; the problems that the carbon source release is unstable, the carbon source needs to be replaced periodically, and the normal operation of the wetland is influenced exist when the plant carbon source is directly used as the wetland substrate or put into the wetland. In addition, the activity and the quantity of microorganisms in the wetland can be seriously influenced by the stronger acidity and the higher heavy metal content of the acidic mine wastewater, so that the biochemical reaction is hindered; the continuous accumulation of heavy metals in the wetland not only causes the pollution and blockage problems of the wetland system, but also can not realize the recovery of heavy metal resources. Therefore, the development of a low-cost ecological technology which can continuously operate, stably and efficiently treat acid mine wastewater and recover heavy metal resources based on an artificial wetland system is an urgent technical problem to be solved in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems and provide a method for treating acid mine wastewater by using an artificial wetland added with plant fermentation liquor. The method and the device can provide a cheap and stable carbon source for the reduction reaction of sulfate reducing bacteria in the constructed wetland, improve the living environment of wetland microorganisms, separate the heavy metal precipitation process from the sulfate reduction reaction, obviously improve the removal efficiency of the system on sulfate radicals and heavy metals in acid mine wastewater, prolong the service life of the wetland, enhance the sustainability of the system operation, and further realize the possibility of recovering the heavy metals in the wastewater.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an ecological wetland system integrating industrial mine wastewater treatment and plant residue treatment is characterized in that the system consists of a heavy metal precipitation system, a plant residue treatment system and an artificial wetland purification system;
the heavy metal precipitation system comprises a wastewater inlet pipe, a precipitation tank, wetland plants A or wetland plants B; the sedimentation tank is a cylinder with an opening at the top, and is of a semi-underground and round structure; a top cover is arranged at the top of the sedimentation tank, and a wastewater inlet pipe penetrates through the top cover and extends into the sedimentation tank to be connected; the upper part of the top cover is provided with a wetland plant A or a wetland plant B; the plant residue treatment system comprises a fermentation tank, a fermentation liquor storage tank and a fermentation liquor feeding pipe; the fermentation tank, the fermentation liquor storage tank and the fermentation liquor feeding pipe are connected in sequence;
the artificial wetland purification system comprises an artificial wetland pool and an artificial wetland water outlet groove; the artificial wetland pool and the artificial wetland water outlet tank are connected through a wetland output pipe; a treatment layer is arranged in the artificial wetland tank; wetland plants B are arranged at the upper part of the artificial wetland pool; the wetland plant B is arranged above the treatment layer;
two water outlet pipes are arranged at the bottom of the water outlet tank of the artificial wetland, and one of the water outlet pipes is connected with the sedimentation tank through a return pipe;
the top of the sedimentation tank is provided with a wetland water inlet pipe, and the outlet of the wetland water inlet pipe is arranged at the top of the artificial wetland tank;
the outlet of the fermentation liquor feeding pipe is arranged at the upper part of the artificial wetland pool.
Furthermore, a sludge discharge pipe is fixedly arranged on the side wall of the sedimentation tank; the top of the mud pipe extends out of the top cover. The sludge discharge pipe is not communicated with the atmosphere in a normal state, and when necessary, an air compressor is connected to the extending end of the sludge discharge pipe, then carbon dioxide or oxygen or air is blown in reversely, and an anaerobic/aerobic environment is supplemented to the sludge.
Furthermore, the sedimentation tank of the utility model comprises a central tube arranged inside and a reflecting plate arranged right below the central tube; the lower part of the sedimentation tank is arranged to be inverted cone-shaped, and the position of the reflecting plate is arranged at the transition position of the cylindrical section and the inverted cone-shaped section of the sedimentation tank.
Furthermore, the edge of the top cover of the utility model is provided with a hem space, the top cover is buckled at the top of the sedimentation tank for connection, the lower edge position of the hem space is lower than the upper edge position of the top of the sedimentation tank, and the inlet of the wetland inlet pipe is connected at the lower edge position of the hem space; the position of the non-flanging space of the top cover is provided with a through hole; the diameter of the through hole is 0.8-1.5 cm.
Furthermore, the fermentation tank of the utility model is internally provided with a baffle plate which divides the fermentation tank into a fermentation area and a primary liquid storage area; the clapboard is provided with a through hole; the aperture of the perforation is 0.3-0.5 cm.
Furthermore, the constructed wetland pool of the constructed wetland purification system of the utility model is arranged as a cylinder with an opening at the top, and the treatment layer is sequentially arranged as a biological carbon layer and a gravel layer from top to bottom; the inlet of the wetland output pipe is arranged in the gravel layer.
Furthermore, the utility model is provided with a flow regulating valve on the waste water inlet pipe; a water inlet pump is arranged on the wetland water inlet pipe; a reflux pump is arranged on the reflux pipe; a valve is arranged on the fermentation liquor outlet pipe; a timing electromagnetic valve and a flow meter are arranged on the fermentation liquor feeding pipe to control the feeding amount of the fermentation liquor. (ii) a The water inlet pump and the reflux pump are respectively connected with an independent timer to control the starting and stopping time of the water pump. .
Further, sedimentation tank, constructed wetland pond and constructed wetland go out the inner wall in basin and all coat and be provided with the barrier layer, prevent that the heavy metal from infiltrating down and influence peripheral soil and groundwater, the barrier layer is the prevention of seepage dope layer, prevention of seepage dope is market purchase prevention of seepage water coating. The plant fermentation tank and the fermentation liquor storage tank are arranged above the artificial wetland pool, and the fermentation liquor is provided by gravitational potential energy without energy consumption.
Furthermore, the wetland plant A of the utility model is religious flower, calamus, cattail or reed; the wetland plant B is yellow iris or canna; the biochar in the biochar layer is formed by burning plant straws such as reeds, canna or shells (walnut shells) under anaerobic conditions, and the grain size after burning is 3-8 mm; the particle size of gravel particles of the artificial wetland gravel layer is 8-15mm, and the ratio of the thickness of the gravel particles to the thickness of the biochar layer is 1: 2-4; the fermentation area in the plant fermentation tank is a mixture of water, activated sludge or marsh bottom mud and plant straws. And (4) after residue in the fermentation tank is removed, preparing new fermentation liquor.
The utility model discloses a treatment method of an ecological wetland system, which comprises the steps of 1) preparing plant fermentation liquor, namely, cutting plant straws such as reed or iris falcata or canna straws, draining, putting the cut plant straws into a fermentation tank, adding water and activated sludge or marsh bottom mud, wherein the adding proportion of the water, the activated sludge or the marsh bottom mud and the plant straws is 1L: 2-5 g: 200 + 500g, and keeping the anaerobic state for 10-15 days;
2) before the device operates, inoculating activated sludge or marsh substrate sludge of a sewage treatment plant into an artificial wetland pool to finish the acclimation of microorganisms in the wetland; after the domestication is finished, the acid mine wastewater (AMD) firstly enters a sedimentation tank through a water inlet pipe to carry out a sedimentation reaction; the effluent of the sedimentation tank enters an artificial wetland tank through a water inlet pump; in order to save electric energy, the starting time of the water inlet pump in each period is 5-15 min, and water is intermittently fed into the wetland; after staying for 12-48 hours, the sewage flows into the water outlet groove through the wetland water outlet output pipe along with the reentry of the sewage; part of the effluent tank is discharged outside, and part of the effluent flows back to the sedimentation tank through a reflux pump; the reflux pump is opened for 5-10min every day, and the reflux amount is 15-30% of the water discharged from the artificial wetland; the sediment in the sedimentation tank is discharged through a sludge discharge pipe at regular intervals; the sludge is rich in sulfuration state metals, or the metals are recycled.
Compare with current device and the operation method of using constructed wetland or biological filter as basis to handle acid mine waste water, the beneficial effects of the utility model embody:
the utility model discloses constructed wetland system is in the water saturation state always, and the plant of chooseing for use like the yellow flower iris comparatively beautifully but the root system is lighter, can prevent that its root system from secreting oxygen to anaerobic microorganisms's influence in the device, so the whole anaerobic state of device is more flourishing, helps sulfate reducing bacteria growth and performance. The sulfate reducing bacteria reduce sulfate into hydrogen sulfide and sulfide ions by using sulfate in the wastewater as an electron donor and adding fermented organic liquid as an electron acceptor, the sulfide ions flow back to the sedimentation tank to react with heavy metals in the mine wastewater to form heavy metal sulfide sediment, and the heavy metal sulfide sediment has a good removing effect on the heavy metals and the sulfate.
The utility model discloses constructed wetland matrix chooses for use the biological charcoal material of basicity, can neutralize acidity, improves waste water pH, prevents the suppression of acidity to the microorganism growth. Meanwhile, the biochar has a large specific surface area, can provide a good attachment environment for the growth and enrichment of microorganisms, has a large adsorption removal capacity for pollutants in the wastewater, and enhances the purification capacity for the wastewater;
the utility model is provided with the sedimentation tank at the water inlet and the reflux pump, the sulfur ions in the water discharged from the artificial wetland are refluxed into the sedimentation tank and react with the acid mine wastewater to form sulfide sediment containing heavy metals, and the heavy metals in the water fed into the artificial wetland tank can be basically removed, thereby reducing the toxicity of the wastewater to the microorganisms in the artificial wetland tank, avoiding the accumulation of the heavy metals in the wetland and effectively prolonging the service life of the wetland; the sedimentation tank is arranged half underground, the occupied area is small, plants are planted on the upper part of the sedimentation tank, the appearance is attractive, and the straw replenishing function is provided for the plant fermentation tank; heavy metal-containing sulfide precipitates in the sedimentation tank can be recycled and utilized after being discharged through a sludge discharge pipe;
4) the reed or yellow flower iris straw adopted by the utility model for preparing the plant fermentation liquor has wide source, low cost and simple and easy preparation method; the plant fermentation liquor is used as a carbon source and added into the constructed wetland for treating the acid mine wastewater, so that the reduction effect of sulfate reducing bacteria can be rapidly and effectively improved, and the stable effluent quality is obtained; the fermentation liquor enters the artificial wetland in a gravity mode, so that the energy consumption is saved.
The invention will be further explained with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic view of the constructed wetland structure for treating acid mine wastewater provided by the utility model.
Reference numbers in the figures: 1-a flow regulating valve, 2-a wastewater inlet pipe, 3.1-a wetland plant A, 3.2-a wetland plant B, 4-a sedimentation tank, 5-a central pipe, 6-a reflecting plate, 7-a sludge discharge pipe, 8-a wetland inlet pipe, 9-a water inlet pump, 10-a timer, 11-an artificial wetland tank, 12-a charcoal layer, 13-a gravel layer, 14-a wetland output pipe, 15-an artificial wetland outlet tank, 16-a water outlet pipe, 17-a return pipe, 18-a return pump, 19-a fermentation tank, 19.1-a partition plate, 19.2-a fermentation area, 19.3 a primary liquid storage area, 20-plant straws, 21-a fermentation liquid outlet pipe, 22-a valve, 23-a fermentation liquid storage tank, 24-a timing electromagnetic valve and 25-a fermentation liquid feeding pipe, 26-top cover, 27-crimping space.
Detailed Description
In order to make the technical means, purposes and functions of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Example 1
According to the water flow direction, as shown in fig. 1, the main structure of the device comprises a sedimentation tank 4, a water inlet pump 9, an artificial wetland tank 11, an artificial wetland water outlet tank 16, a reflux pump 19 and a fermentation liquor storage tank 21 connected with the artificial wetland tank 11 which are connected in sequence. One end of the sedimentation tank 4 is provided with a wastewater inlet pipe 2 connected with acid mine wastewater (AMD); the other end of the sedimentation tank is connected with the water inlet end of an artificial wetland tank 11 through a wetland water inlet pipe 8 and a water inlet pump 9; the water outlet end of the artificial wetland tank 11 is connected with a water outlet groove 15 thereof through an adjustable output pipe 14; the water outlet groove 15 is provided with two water outlets, one is connected with a water outlet pipe 16, and the other is connected with the sedimentation tank 4; the return pipe 17 is provided with a return pump 18 which is connected with the water outlet tank 15 and the wastewater inlet pipe 2; one end of the fermentation liquor storage tank 23 is connected with the plant fermentation tank 19 through a fermentation liquor outlet pipe 21, and the other end is connected with the artificial wetland tank 11 through a fermentation liquor feeding pipe 25.
Furthermore, a flow regulating valve 1 is arranged on the wastewater inlet pipe 2 to regulate the inflow flow of wastewater; a common valve 22 is arranged on the fermentation liquor outlet pipe 21 and is used for opening and closing a pipeline and controlling the flow direction; a timing electromagnetic valve 24 and a flowmeter are arranged on the fermentation liquor feeding pipe 25 to control the feeding amount of the fermentation liquor.
Further, sedimentation tank 4 be vertical flow sedimentation tank, include center tube 5, reflecting plate 6 and mud pipe 7 that link to each other with waste water inlet tube 2, make the heavy metal in the waste water and the sulphur ion take place the reaction and generate the sediment, get rid of other suspended solid simultaneously to make constructed wetland come the water homogeneity. The sedimentation tank 4 adopts a semi-underground and round structure, the upper part of the sedimentation tank is sealed, and plants 3, such as iris citrifolia or canna indica, are planted. The size of the sedimentation tank 4 is far larger than the effective volume of the artificial wetland tank 11, and can be 4-8 times.
Further, artifical wetland pond 11 for vertical current artifical wetland pond, from top to bottom be charcoal layer 12 and gravel layer 13 in proper order. The biochar in the biochar layer 12 is prepared by cutting wetland plants (such as rhizoma Phragmitis and herba Iridis Tectori) or fruit shells (walnut shells) and burning under anaerobic condition, and has a particle size of 3-8mm, and herba Iridis Tectori or rhizoma Phragmitis plants 3 are planted on the outer surface of the top end. The gravel particles in the gravel layer 13 have a particle size of 8 to 15 mm. The ratio of the thickness of the gravel layer 13 to the thickness of the biochar layer 12 is 1: 2-4. The inner side of the water outlet of the artificial wetland pool 11 is provided with a filter screen with the aperture of 2-4 mm to prevent the loss of filter materials, and the water outlet is provided with a wetland output pipe to ensure that the device is always in a water saturation state, thereby being beneficial to the growth and enrichment of sulfate reducing bacteria.
Further, the plant fermentation tank 19 comprises water, activated sludge or marsh sludge and plant straws 20, specifically, the sludge is sludge from a sludge dewatering room of a sewage treatment plant or marsh mud, the plant straws 20 such as reed or iris falcata straws are cut into 1-3 cm, and the cut pieces are put into the fermentation tank together with the activated sludge or marsh mud after being drained, the adding proportion of the water, the activated sludge or the marsh mud and the plant straws is 1L: 2-5 g: 200-.
When the system is used, in the early stage of operation of the device, anaerobic sludge or marsh substrate sludge of a sewage treatment plant is inoculated into the vertical flow artificial wetland to finish the acclimation of microorganisms in the wetland; after the domestication is finished, acid mine wastewater (AMD) firstly enters a sedimentation tank 4 through a water inlet pipe 2 to carry out a sedimentation reaction; the effluent of the sedimentation tank 4 enters a vertical flow artificial wetland 11 through a water inlet pump 9. In order to save electric energy, the water inlet pump 9 is controlled to be started for 5-15 min by the timer 10 in each period; the wastewater stays in the vertical flow artificial wetland 11 for 12 to 48 hours and then flows into the water outlet groove 15 through the wetland water outlet output pipe 14 along with the reentry of the wastewater. The water outlet groove 15 discharges part of water, and part of water flows back to the sedimentation tank 4 through the reflux pump 9; the time of the reflux pump is 5-10min per day, and the reflux amount is 15-30% of the water output by the artificial wetland 11.
Furthermore, the plant fermentation tank 19 and the fermentation liquor storage tank 23 are built above the artificial wetland pool, and the fermentation liquor is provided for the artificial wetland pool 11 by gravitational potential energy, so that energy is not consumed; the opening time of the fermentation liquor feeding valve is consistent with that of the water inlet pump, and the feeding amount is 0.8:1-2.5:1 according to the ratio of the COD value in the fermentation liquor storage tank to the sulfate radical content in the acid mine wastewater.
Example 2
The structure for treating the acid mine wastewater is shown in figure 1, a sedimentation tank, an artificial wetland water outlet tank, a plant fermentation tank and a fermentation liquor storage tank are all made of PE, wherein the length, the width and the height of the artificial wetland tank are respectively 20cm, 20cm and 70cm, a gravel layer with the thickness of 15 cm is arranged at the lower part of the artificial wetland tank, the artificial wetland tank is filled with biochar made of walnut shells, the particle size is 3-6 mm, the filling height is 50 cm, iris falcata is planted at the upper part of the biochar, 3 g of sludge in the sludge dewatering process of a certain sewage treatment plant is uniformly mixed with water and then is inoculated into the artificial wetland tank once every 5 days before the device is formally operated, inoculation is carried out for 4 times, acclimation of microorganisms of the device is completed, the water inlet pump is started for 10min after the device formally operates, the artificial wetland tank is filled with wastewater, the water inlet pump is closed, the hydraulic retention time of the water in the artificial wetland tank is 24 h, the water outlet water flows into the water outlet tank through the wetland output pipe, part of the water outlet tank is returned to the sedimentation tank through the reflux pump, the reflux pump is started for 5 min every day, the reflux pump, the water of the artificial wetland tank, the industrial wetland tank reaches the concentration of 3511 mg of Cd, the sewage outlet water, the concentration of the sewage is increased by the sewage, the reflux water of the sewage is increased by the concentration of the sewage, the sewage is 3535 mg/L mg of the sewage, the sewage is increased by the concentration of.
Example 3
The structure for treating the acid mine wastewater is shown in figure 1, a sedimentation tank is made of reinforced concrete, an artificial wetland tank, an artificial wetland water outlet tank, a plant fermentation tank and a fermentation liquor storage tank are made of PE, wherein the length, the width and the height of the artificial wetland tank are respectively 60 cm, 60 cm and 200 cm, a 60 cm-thick gravel layer is arranged at the lower part of the artificial wetland tank, the artificial wetland tank is filled with biochar fired by walnut shells, the particle size is 3-6 mm, the filling height is 120 cm, canna is planted at the upper part of the biochar, 5g of sludge in a sludge dewatering room of a certain sewage treatment plant is uniformly mixed with water before the formal operation of the device, the mixture is inoculated into the artificial wetland tank once every 5 days and inoculated for 4 times, the domestication of the microorganism of the device is completed, the water inlet pump is started for 15 min after the water inlet pump is started for 15 min when the device is in the formal operation, the water inlet pump is filled with wastewater, the water inlet pump is closed, the hydraulic water outlet water flows into the water outlet tank through an output pipe, part of the water outlet tank flows back to the precipitation tank through an output pipe, part of the water outlet tank, the water returns to the precipitation tank through a reflux pump for 15 min, the water outlet is started for 10min, the reflux concentration of the reflux of the plant is 3510-35 mg of the wastewater, the reflux water reaches 3510 mg/35% of the reflux water, the reflux water of the reflux system, the reflux water of the wastewater is 3535% of the wastewater, the reflux water is added into the pH of the pH.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. An ecological wetland system integrating mine wastewater treatment and plant residue treatment is characterized in that the system consists of a heavy metal precipitation system, a plant residue treatment system and an artificial wetland purification system;
the heavy metal precipitation system comprises a wastewater inlet pipe (2), a precipitation tank (4), wetland plants A (3.1) or wetland plants B (3.2); the sedimentation tank (4) is arranged into a cylinder body with an opening at the top; a top cover (26) is arranged at the top of the sedimentation tank (4), and the wastewater inlet pipe (2) penetrates through the top cover (26) and extends into the sedimentation tank (4) to be connected; the wetland plant A (3.1) or wetland plant B (3.2) is arranged on the top of the top cover (26); the plant residue treatment system comprises a fermentation tank (19), a fermentation liquor storage tank (23) and a fermentation liquor feeding pipe (25); the fermentation tank (19), the fermentation liquor storage tank (23) and the fermentation liquor feeding pipe (25) are connected in sequence;
the artificial wetland purification system comprises an artificial wetland pool (11) and an artificial wetland water outlet groove (15); the artificial wetland pool (11) and the artificial wetland water outlet groove (15) are connected through a wetland output pipe (14); a treatment layer is arranged in the artificial wetland pool (11); wetland plants B (3.2) are arranged at the upper part of the artificial wetland pool (11); wetland plants B (3.2) are arranged above the treatment layer;
two water outlet pipes (16) are arranged at the bottom of the artificial wetland water outlet tank (15), wherein one water outlet pipe (16) is connected with the sedimentation tank (4) through a return pipe (17);
a wetland water inlet pipe (8) is arranged at the top of the sedimentation tank (4), and the outlet of the wetland water inlet pipe (8) is arranged at the top of the artificial wetland tank (11);
the outlet of the fermentation liquor feeding pipe (25) is arranged at the upper part of the artificial wetland pool (11).
2. The ecological wetland system according to claim 1, characterized in that a sludge discharge pipe (7) is fixedly arranged on the side wall of the sedimentation tank (4); the top of the sludge discharge pipe (7) extends out of the top cover (26).
3. The ecological wetland system according to claim 1 or 2, characterized in that the sedimentation tank (4) comprises a central pipe (5) arranged inside and a reflecting plate (6) arranged right below the central pipe (5); the lower part of the sedimentation tank (4) is arranged to be inverted cone-shaped, and the position of the reflecting plate (6) is arranged at the transition position of the cylindrical section and the inverted cone-shaped section of the sedimentation tank (4).
4. The ecological wetland system according to claim 1 or 2, characterized in that the edge of the top cover (26) is provided with a folding space (27), the top cover (26) is buckled on the top of the sedimentation tank (4) for connection, the lower edge position of the folding space (27) is lower than the upper edge position of the top of the sedimentation tank (4), and the inlet of the wetland water inlet pipe (8) is connected at the lower edge position of the folding space (27); a through hole is provided in the non-folding space (27) of the top cover (26).
5. The ecological wetland system according to claim 1, characterized in that a partition (19.1) is arranged in the fermentation tank (19), and the partition (19.1) divides the fermentation tank (19) into a fermentation area (19.2) and a primary liquid storage area (19.3).
6. The ecological wetland system according to claim 1, wherein the artificial wetland pool (11) of the artificial wetland purification system is provided as a cylinder with an open top, and the treatment layer is sequentially provided with a charcoal layer (12) and a gravel layer (13) from top to bottom; the inlet of the wetland output pipe (14) is arranged in the gravel layer (13).
7. The ecological wetland system according to claim 1, characterized in that a flow regulating valve (1) is arranged on the wastewater inlet pipe (2); a water inlet pump (9) is arranged on the wetland water inlet pipe (8); a reflux pump (18) is arranged on the reflux pipe (17); a valve (22) is arranged on the fermentation liquor outlet pipe (21); a timing electromagnetic valve (24) is arranged on the fermentation liquor feeding pipe (25); the water inlet pump (9) and the return pump (18) are respectively connected with an independent timer (10).
8. The ecological wetland system according to claim 1, characterized in that the inner walls of the sedimentation tank (4), the artificial wetland tank (11) and the artificial wetland effluent tank (15) are coated with impermeable layers; the plant fermentation tank (19) and the fermentation liquor storage tank (23) are arranged above the artificial wetland pool (11) and provide fermentation liquor by gravitational potential energy.
9. The ecological wetland system of claim 6, wherein the wetland plant A (3.1) is Thalia dealbata, Acorus calamus, Typha angustifolia, or Phragmites communis; the wetland plant B (3) is yellow iris or canna; the biochar in the biochar layer (12) is formed by burning plant straws under an anaerobic condition, and the grain size after burning is 3-8 mm; the diameter of the gravel particles of the artificial wetland gravel layer (13) is 8-15mm, and the ratio of the thickness of the artificial wetland gravel layer to the thickness of the biochar layer (12) is 1: 2-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922092425.0U CN211141659U (en) | 2019-11-28 | 2019-11-28 | Ecological wetland system integrating mine wastewater treatment and plant residue treatment |
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| CN201922092425.0U CN211141659U (en) | 2019-11-28 | 2019-11-28 | Ecological wetland system integrating mine wastewater treatment and plant residue treatment |
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| CN211141659U true CN211141659U (en) | 2020-07-31 |
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| CN201922092425.0U Expired - Fee Related CN211141659U (en) | 2019-11-28 | 2019-11-28 | Ecological wetland system integrating mine wastewater treatment and plant residue treatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111908617A (en) * | 2020-09-08 | 2020-11-10 | 中国电建集团成都勘测设计研究院有限公司 | Substrate filler for strengthening constructed wetland dephosphorization by utilizing wetland plant reinvigoration flowers and method |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111908617A (en) * | 2020-09-08 | 2020-11-10 | 中国电建集团成都勘测设计研究院有限公司 | Substrate filler for strengthening constructed wetland dephosphorization by utilizing wetland plant reinvigoration flowers and method |
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