阅读说明：本技术 一种硬质护岸壁挂式沉水植物净水模块及其应用 (Hard revetment wall-mounted submerged plant water purification module and application thereof ) 是由 王炜 于 2021-09-30 设计创作，主要内容包括：本发明涉及水环境生态修复和水质净化技术领域,尤其是涉及一种壁挂式沉水植物净水模块及其应用,该模块由过滤模块和种植模块组成,种植模块内部种植沉水植物,过滤模块内部均匀分布有营养盐富集吸附材料并设置集水槽,将壁挂式沉水植物净水模块固定在河道硬质护岸,利用对氮、磷等营养盐富集吸附材料作为过滤介质,以过滤运行作为连续富集营养盐,供植物吸收的方式,保证沉水植物持续稳定生长繁殖,在维持河道生态系统和河道景观同时,实现对污染水质的净化。(The invention relates to the technical field of water environment ecological restoration and water quality purification, in particular to a wall-mounted submerged plant water purification module and application thereof.)

1. A hard revetment wall-hanging type submerged plant water purification module is characterized by comprising a fixed filtration module (1) and a detachable planting module (2),

the filtering module (1) comprises a water collecting tank (5), a filtering tank (10), a filtering medium and planting holes (3); the bottom of the filtering module (1) is provided with a water collecting tank (5), and the filtering tank (10) is connected with the water collecting tank (5) and is positioned right above the water collecting tank (5); the filter medium is uniformly distributed in the filter tank (10); the top end of the filter tank (10) is provided with planting holes (3) which are uniformly distributed;

the planting module (2) comprises a planting cup (15) and a submerged plant (23), wherein the submerged plant (23) is fixed in the planting cup (15);

the longitudinal section of the filtering module (1) is of a trapezoidal structure, and the lower part is small and the upper part is large;

the planting module (2) is arranged in the planting hole (3), and the shape and the size of the planting module (2) are matched with those of the planting hole (3).

2. The hard revetment wall-mounted type submerged plant water purification module according to claim 1, wherein the upstream surface of the wall-mounted type submerged plant water purification module is designed to be inclined.

3. The hard revetment wall-hung type submerged plant water purification module according to claim 1, wherein the filtration medium is a medium embedded with nitrogen-absorbing particles, phosphorus-accumulating particles and growth-promoting particles.

4. The application of the wall-hung type submerged plant water purification module with the hard revetment is characterized by comprising the following steps of:

(1) after the submerged plant is cultured, mounting the planting module in the planting hole of the filtering module;

(2) connecting filtering water pumps among modules of the wall-mounted type submerged plant water purification module to obtain a wall-mounted type submerged plant water purification module component;

(3) and fixing the wall-mounted submerged plant water purification module components on two sides of the hard revetment of the river channel.

5. The use of the hard revetment wall-mounted submerged plant water purification module as claimed in claim 4, wherein in step (1), the submerged plant is installed in a planting cup, produced in a culture base in advance, and grown up to be alive and then directly fixed in the planting hole of the filtration module.

6. The use of the hard revetment wall-mounted submerged plant water purification module as claimed in claim 4, wherein in step (2), the filtration water pump performs circulating biological filtration, and then discharges the filtered impurities out of the river.

7. The use of a hard revetment wall-hung submerged plant water purification module as claimed in claim 4, wherein in step (3), the hard revetment comprises a U-shaped hard revetment and a V-shaped hard revetment.

8. The application of the hard revetment wall-mounted type submerged plant water purification module as claimed in claim 4, wherein in the step (3), the wall-mounted type submerged plant water purification module is fixed 200mm below the normal water level of the river or 200mm above the sediment, and is fixed in a row at intervals of 300 mm and 500 mm.

9. The use of the hard revetment wall-mounted type submerged plant water purification module as claimed in claim 4, wherein in step (3), the submerged plants in the wall-mounted type submerged plant water purification module are directly replaced after death.

10. The use of the wall-hung type submerged plant water purification module as claimed in claim 4, wherein in the step (3), the wall-hung type submerged plant water purification module is fixed on the hard bank protection of the river channel and then is matched with the aeration and bottom mud oxidation treatment of the river channel.

Technical Field

The invention relates to the technical field of water environment bioremediation and water quality purification, in particular to a hard revetment wall-mounted submerged plant water purification module and application thereof.

Background

The submerged plant is an important primary productivity of a river channel ecosystem and is an important component of the ecosystem, and in the river channel, the submerged plant can produce oxygen through photosynthesis, increase dissolved oxygen in a water body and prevent the water body from being black and smelly; the submerged plants secrete flocculating agents and flocculate and precipitate suspended matters in the water body, so that river water is kept clear; the submerged plants inhibit the growth of algae through allelopathy and control the eutrophication of the water body; the submerged plants also provide a good habitat for the spawning of the micro-animals and the fishes in the water body, are favorable for building a complex aquatic ecosystem, and have a larger ecological function and a water quality purification function.

However, the formation of the submerged plant community has high requirements on water quality and river flow state, certain transparency and planting conditions are required, but the river channel is an open system, so that even if sewage interception is completed, the endogenous pollution of the river channel and the non-point source pollution caused by surface runoff exist for a long time, the daily drainage of the river channel is required, certain water flow is maintained, the turbidity of the river water is high, the light compensation intensity for planting the submerged plants cannot be met, and particularly, the submerged plants planted at the bottom of the river are easily influenced by the turbidity; the river sediment conditions are complex, many river sediment pollutes seriously, a large amount of hard substances such as stones and garbage exist, and the planting conditions are severe; the submerged plants are directly planted at the river bottom, the river water needs to be drained, the engineering quantity is large, and the maintenance is difficult; the urban river course undertakes urban flood discharge and flood discharge functions, when high-strength rainstorm, the water flow speed is high, and the submerged plants are easily pulled up together with roots by the flood to the bottom mud scouring, so that the submerged vegetation planted on two sides of the river course is more operable than the bottom planting by utilizing the existing hard revetment of the river course.

Patent CN110012815A adopts the method that submerged plant matrix is filled in a non-woven fabric bag to plant submerged plants, and a rubber band is adopted to tie the bag mouth and sink into the bottom of a river channel for planting. The method has the advantages of convenient material taking, simple operation, manpower and material resource saving, environmental protection, and capability of creating good growth conditions for the recovery of submerged plants at the bottom of the river channel, adding a proper amount of calcium peroxide, zeolite particles, ceramsite and river channel bottom mud into the planting bag matrix, fully stirring, neutralizing the acid bottom mud to a certain extent, improving the mineralization speed of the river channel bottom mud, and repairing the bottom mud. However, the river channel with high turbidity and serious pollutants is difficult to plant and survive due to the fact that submerged plants are planted on the river bottom; high-strength flood can wash away the plants, and the cleaning of the planting bags is more troublesome after the plants are washed away. The CN211832031U patent discloses that a hard riverway bottom mud submerged plant planting blanket is also planted at the bottom of a river; although the submerged plant sinking bed of patent CN211712744U can go up and down, is favorable to the submerged plant field planting, but the sinking bed structure is complicated, including a plurality of units such as sinking bed, planting basket, matrix, submerged plant, the regulation mode is complicated, is difficult to operate. Patent CN 107926671B discloses a method for hanging ecological planting of submerged plants, which uses non-woven fabrics or spun silk to make a net bed, fills quartz sand or ceramsite as the planting matrix of submerged plants, plants the cultivated submerged plants easy to survive on the net bed with the matrix, hangs the net bed on the bank of the hard river channel, and forms a submerged plant growth area on both banks of the river channel. Although the submerged plants are planted in the shallow water area, the submerged plants are beneficial to growth and have high survival rate, the method is only suitable for urban slow flow riverways, and if torrential rain and flood flows are large, the net bed is easily washed away; the exchange between the substrate material for planting the submerged plants and the water body is less, on one hand, the water quality purification function is influenced, on the other hand, the substrate can not continuously adsorb nutrient salt in the river water for the submerged plants to absorb, and the growth of the submerged plants is not facilitated.

Disclosure of Invention

Urban riverways face adverse factors such as high river turbidity, seasonal rainstorm scouring and the like, submerged plants are difficult to plant, and in the prior art, riverway sediment is mostly planted as a basis, or a complicated lifting bed, a planting net and the like are adopted, so that the submerged plants are difficult to plant and survive. Aiming at the problems, the invention provides a wall-mounted type submerged plant water purification module for hard revetment and application thereof, wherein the module is fixed on the hard revetment of a river channel and can adsorb nutrient salts such as nitrogen, phosphorus and the like in a water body for the growth of submerged plants, namely the water purification module enables the submerged plants to grow on the bank of the hard river channel; meanwhile, the water quality is purified by circularly filtering the filter medium, an ecological system and a river landscape in a river are maintained, and the river water quality is improved.

The method is characterized in that nutrient salt enrichment adsorption materials such as nitrogen, phosphorus and the like are used as a filter medium, and the filter operation is used as a continuous nutrient salt enrichment mode for plants to absorb, so that the submerged plants are ensured to continuously and stably grow and reproduce; the wall-mounted submerged plant water purification module consists of a filtering module and a planting module; the filter module in the wall-mounted submerged plant water purification module is fixed on a hard riverway bank protection and is more than 200mm away from bottom mud of a riverway, so that the influence of adverse factors such as flood outbreak, bottom mud resuspension and the like on the growth of submerged plants is avoided; the filter modules are fixed below the normal water level of 200mm, are fixed in a row at intervals of 300-500mm, and can be fixed in multiple rows in parallel along with the depth of the water level of the river channel so as to ensure the light compensation intensity required by the growth of submerged plants; the wall-mounted submerged plant water purification module can be detached, can be cultured under good planting conditions in advance, is implanted into the filtering module fixed in the riverway after survival, and can be detached in time after the submerged plants die in the riverway site, so that a new planting module for cultivating the living submerged plants is supplemented, and the assembly and disassembly are simple and the operation is flexible; the wall-mounted submerged plant water purification module adopts an inclined plane design at the upstream surface and the bottom, so that the influence of flood on the module is reduced to the minimum, and submerged plants can have enough growth space;

the filter module in the wall-mounted submerged plant water purification module comprises a filter tank, planting holes, filter media, a water collecting tank and the like, the filter module is a trapezoidal inclined plane, the lower part of the filter module is small, the upper part of the filter module is large, the bottom of the filter module is the water collecting tank, the filter tank is arranged on the filter module, the filter tank is filled with medium materials of nitrogen-absorbing particles, phosphorus-accumulating particles and growth-promoting particles, the planting holes are uniformly distributed on a first cover plate at the upper end of the filter module, the inclined plane is downward and is separated from other parts of the filter module through a filter module grid, and a planting cup thread bayonet on the planting module is connected with a filtering module planting hole thread bayonet; accessible water catch bowl pipe connection between the filtration module, finally be connected to the filtration water pump, through the operation of filtration water pump drive filtration module, make the river evenly get into from upper portion, through medium and submerged plant root system, get into the collector pipe, through filtration water pump discharge river course, wall-hanging submerged plant water purification module passes through nutrient salt absorption, mode water purification such as biomembrane filtration, continuously enriches nutrient salt simultaneously and supplies submerged plant to grow.

The purpose of the invention can be realized by the following technical scheme:

the invention provides a hard shore protection wall-hung type submerged plant water purification module which is characterized by comprising a fixed filtering module and a detachable planting module,

the filtering module comprises a water collecting tank, a filtering medium and planting holes; the bottom of the filtering module is provided with a water collecting tank, and the filtering tank is connected with the water collecting tank and is positioned right above the water collecting tank; the filter media are uniformly distributed in the filter tank; the top end of the filter tank is provided with planting holes which are uniformly distributed;

the planting module comprises a planting cup and a submerged plant, and the submerged plant is fixed in the planting cup;

the longitudinal section of the filtering module is of a trapezoidal structure, and the lower part of the filtering module is small and the upper part of the filtering module is large;

the planting module is arranged in the planting hole, and the shape and the size of the planting module are matched with those of the planting hole.

In one embodiment of the invention, the upstream surface of the wall-mounted submerged plant water purification module is designed to be an inclined surface.

In one embodiment of the invention, the filter medium is a medium in which nitrogen-adsorbing particles, phosphorus-accumulating particles and growth-promoting particles are embedded.

The invention also provides an application of the wall-hung type submerged plant water purification module with the hard revetment, which comprises the following steps:

(1) after the submerged plant is cultured, the planting module is arranged in the planting hole of the filtering module;

(2) connecting filtering water pumps among modules of the wall-mounted type submerged plant water purification module to obtain a wall-mounted type submerged plant water purification module component;

(3) and fixing the wall-mounted submerged plant water purification module components on two sides of the hard revetment of the river channel.

In one embodiment of the invention, in step (1), the submerged plant is installed in a planting cup, is produced in a culture base in advance, and is directly fixed in the planting hole of the filter module after growing up and surviving.

In one embodiment of the invention, in the step (2), the filtration water pump performs circulating biological filtration, and then the filtered impurities are discharged out of the river channel.

In one embodiment of the present invention, in step (3), the hard revetment comprises a U-shaped hard revetment and a V-shaped hard revetment.

In one embodiment of the invention, in the step (3), the wall-mounted type submerged plant water purification modules are fixed 200mm below the normal water level of the river or 200mm above the sediment, and are fixed in a row every 300-500 mm.

In one embodiment of the invention, in the step (3), the wall-mounted type submerged plant water purification module is directly replaced after the submerged plant dies.

In one embodiment of the invention, in the step (3), the wall-mounted submerged plant water purification module is fixed on a hard bank protection of a river channel and then is matched with river channel aeration and sediment oxidation treatment.

Compared with the prior art, the invention has the following beneficial effects:

(1) the wall-mounted submerged plant water purification module is formed by combining a fixed filtering module and a detachable planting module, the filtering module is fixed on a hard revetment of a river channel and is positioned 200mm below a normal water level, 200mm above bottom mud and one row of filtering modules are fixed at intervals of 300-plus 500mm, the fixed positions of the filtering modules can be designed according to the water level and the turbidity of river water, so that the light compensation intensity of submerged plants is ensured, the planting module can be produced in a culture base in advance, and can be directly fixed on the filtering module after growing up and surviving, and can also be directly replaced after the submerged plants die, so that the repairing and the recovery after the submerged plants survive or are damaged are ensured, the situation that the submerged plants planted at the bottom of the river cannot survive due to the influence of turbidity is avoided, and the wall-mounted submerged plant water purification module can be used for repairing the submerged vegetation of the river channel with higher turbidity.

(2) The wall-mounted submerged plant water purification module is arranged on the upstream face by adopting an inclined plane, so that the impact of flood on the module and submerged plants is relieved, the submerged plants in the riverway can survive in a severe environment, and meanwhile, the submerged vegetation in the riverway bank protection can build a unique landscape effect on both banks.

(3) The wall-mounted submerged plant water purification module utilizes nutrient salt enrichment adsorption materials such as nitrogen, phosphorus and the like as a filter medium, and uses filter operation as continuous enriched nutrient salt for plants to absorb and utilize, thereby ensuring continuous and stable growth and propagation of submerged plants.

(4) Accessible water catch bowl pipe connection filters the water pump between each filtration module, carries out circulation biofiltration, and wall-hanging benthophyte water purification module passes through modes such as nutritive salt absorption, biofiltration and purifies quality of water, and the nutritive salt that lasts simultaneously enriches supplies the benthophyte to grow.

(5) The submerged plants are planted in the hard revetment spaces on the two sides of the river channel to restore the ecological system of the river channel, the ecological function restoration effect is the same as that of the submerged vegetation formed by the traditional sediment aquatic plant planting mode, and the method can be applied to urban river channels which are not suitable for planting the submerged plants at the river bottom due to higher turbidity.

Drawings

Fig. 1 is a schematic view of a filter module in a wall-mounted type submerged plant water purification module applied to hard bank protection according to the present invention;

FIG. 2 is a schematic view of a planting module in a wall-mounted type submerged plant water purification module applied to hard bank protection according to the present invention;

fig. 3 is a partial schematic view of a water collecting tank in a wall-mounted type submerged plant water purification module applied to hard bank protection according to the present invention;

fig. 4 is a partial schematic view illustrating installation of a filter module in a wall-mounted type submerged plant water purification module for hard bank protection according to the present invention;

fig. 5 is a schematic view illustrating the planting of submerged plants in a wall-mounted submerged plant water purification module for hard bank protection according to the present invention;

FIG. 6 is a schematic view of the installation of a wall-mounted type submerged plant water purification module applied to a U-shaped hard revetment according to the present invention;

FIG. 7 is a schematic view of the installation of a wall-mounted type submerged plant water purification module applied to V-shaped hard revetment according to the present invention;

reference numbers in the figures: 1. a filtration module; 2. a planting module; 3. planting holes; 4. planting a hole threaded bayonet; 5. a water collection tank; 6. a nitrogen absorbing filter material; 7. phosphorus-gathering filter materials; 8. a growth promoting filter material; 9. planting a hole grid; 10. a filter tank; 11. a cover plate; 1101. a first cover plate; 1102. a second cover plate; 12. a water collection hole; 13. a sump slope; 14. a screw bayonet of the planting cup; 15. planting a cup; 16. planting a cup grid; 17. geotextile; 18. a bayonet; 19. u-shaped hard revetment; 20. v-shaped hard revetment; 21. a sump pipe; 22. a water pump is filtered; 23. and (5) submerged plants.

Detailed Description

The invention provides a hard bank protection wall-mounted submerged plant water purification module which is characterized by comprising a fixed filtering module and a detachable planting module,

the filtering module comprises a water collecting tank, a filtering medium and planting holes; the bottom of the filtering module is provided with a water collecting tank, and the filtering tank is connected with the water collecting tank and is positioned right above the water collecting tank; the filter media are uniformly distributed in the filter tank; the top end of the filter tank is provided with planting holes which are uniformly distributed;

the planting module comprises a planting cup and a submerged plant, and the submerged plant is fixed in the planting cup;

the longitudinal section of the filtering module is of a trapezoidal structure, and the lower part of the filtering module is small and the upper part of the filtering module is large;

the planting module is arranged in the planting hole, and the shape and the size of the planting module are matched with those of the planting hole.

In one embodiment of the invention, the upstream surface of the wall-mounted submerged plant water purification module is designed to be an inclined surface.

In one embodiment of the invention, the filter medium is a medium in which nitrogen-adsorbing particles, phosphorus-accumulating particles and growth-promoting particles are embedded.

The invention also provides an application of the wall-hung type submerged plant water purification module with the hard revetment, which comprises the following steps:

(1) after the submerged plant is cultured, the planting module is arranged in the planting hole of the filtering module;

(2) connecting filtering water pumps among modules of the wall-mounted type submerged plant water purification module to obtain a wall-mounted type submerged plant water purification module component;

(3) and fixing the wall-mounted submerged plant water purification module components on two sides of the hard revetment of the river channel.

In one embodiment of the invention, in step (1), the submerged plant is installed in a planting cup, is produced in a culture base in advance, and is directly fixed in the planting hole of the filter module after growing up and surviving.

In one embodiment of the invention, in the step (2), the filtration water pump performs circulating biological filtration, and then the filtered impurities are discharged out of the river channel.

In one embodiment of the present invention, in step (3), the hard revetment comprises a U-shaped hard revetment and a V-shaped hard revetment.

In one embodiment of the invention, in the step (3), the wall-mounted type submerged plant water purification modules are fixed 200mm below the normal water level of the river or 200mm above the sediment, and are fixed in a row every 300-500 mm.

In one embodiment of the invention, in the step (3), the wall-mounted type submerged plant water purification module is directly replaced after the submerged plant dies.

In one embodiment of the invention, in the step (3), the wall-mounted submerged plant water purification module is fixed on a hard bank protection of a river channel and then is matched with river channel aeration and sediment oxidation treatment.

The invention is described in detail below with reference to the figures and specific embodiments.

Example 1

This embodiment provides a wall-hanging benthophyte water purification module.

The wall-mounted submerged plant water purification module consists of a filtering module 1 (figure 1) and a planting module 2 (figure 2), wherein the filtering module 1 and the planting module 2 can be detached through threads; the filtration module is by planting module screw thread bayonet socket 4, plant hole 3, filter media (inhale nitrogen granule 6, gather phosphorus granule 7, promote the living granule 8), the water catch bowl 5 is constituteed, filtration module 1 is trapezoidal inclined plane upwards, big end up, the bottom is water catch bowl 5, inside evenly fills inhales nitrogen granule 6, gather phosphorus granule 7, promote the filter media of living granule 8, plant hole 3 evenly distributed on filtration module, perpendicular oblique downwards, it separates planting hole 3 and filtration module 2 other parts through filtration module grid 9, plant hole screw thread bayonet socket 4 and filtration module grid 9 and connect (figure 1). A first cover plate 1101 is arranged at the upper end of a filter tank 10 in the filter module 1, the filter tank 10 and the first cover plate 1101 are fixed through screws, planting holes 3 are uniformly distributed on the first cover plate 1101, and other parts are porous grids (figure 1); the upper end of the water collecting tank 5 is provided with a second cover plate 1102, the water collecting tank 5 and the second cover plate 1102 are fixed through screws, 5mm water collecting holes 12 are uniformly distributed in the upper portion of the water collecting tank 5, the upstream surface of the water collecting tank 5 is designed to be an inclined surface 13, the bottom of the water collecting tank 5 is designed to be an inclined surface, the non-upstream surface is designed to be vertical, threads are formed in the middle of the non-upstream surface water collecting tank, and filter tank units are convenient to connect (fig. 3). Planting module 2 by planting the cup 15, the benthophyte 23 is constituteed, it is trapezoidal to plant cup 15, plant the hole 3 with the filtration module and match, it is planting module grid 16 to plant the cup wall, it still is provided with planting cup screw thread bayonet 14 (figure 2) on the module grid 16 to plant, the plant roots of being convenient for gets into and absorbs the nutrition in the medium, the benthophyte 23 wraps up the back through geotechnological cloth 17, it is fixed to fill in planting cup 15 (figure 5), it is the same with planting hole 3 upper portion diameter and bottom of cup diameter to plant cup 15 upper portion diameter and bottom of cup diameter, it is provided with bayonet 18 to plant cup 15 upper portion, so that fixed benthophyte 23 (figure 2). The wall-mounted submerged plant water purification module can be directly fixed on a U-shaped hard revetment 19 (figure 6) or a V-shaped hard revetment 20 (figure 7), but the filtration module fixed on the V-shaped river hard revetment is triangular, and the structure of the filtration module is basically consistent with that of the U-shaped river filtration module. The filter modules can be connected through a water collecting tank pipeline 21 and finally connected with a filter water pump 22, and the filter modules 1 are driven to operate through the filter water pump 22 (figure 4).

Example 2

The embodiment provides an application of a wall-mounted type submerged plant water purification module of a hard revetment.

A certain river course of Guangzhou is a semi-closed tidal river course, the governing river reach is the rearmost end of the river course, the length is 1200m, the width is 15m, the water level rises when the tide rises, the water level falls when the tide falls, the water depth is 0.8m when the water level is the lowest, the water depth is 1.6m when the water level is the highest, and the water level difference is 0.8 m. The river channel is a typical U-shaped river channel, and the two banks are hard revetments made of stone mortar. The river channel sewage interception engineering and the dredging engineering are completed, and in order to restore the river channel ecology as soon as possible, 6m submerged plant modules are arranged on hard revetments at two banks at a position 100m away from the tail end of the river channel.

(1) The wall-mounted submerged plant water purification module consists of a filtering module and a planting module.

(2) The length of the filtering module is 3m, the section of the filtering module is trapezoidal, the filtering module is vertically hung on the U-shaped hard revetment wall, the width of the bottom plate is 0.2m, the width of the first cover plate is 0.38m, the height of the first cover plate is 0.4m, and a second cover plate is welded 8cm away from the bottom plate to form a water collecting tank; the first cover plate is a grating plate, and planting holes with the diameter of 50 are formed every 0.2 m.

(3) The filtering module is filled with 20mm zeolite filter materials, 20mm steel slag and 10mm biological ceramsite, and the volume ratio of the three components is 1: 1: 1.

(4) adopting a pipe with the diameter of 50pvc, forming holes with the diameter of 6mm at the periphery and the bottom, manufacturing a submerged plant planting module, wrapping the roots of the tape grass with geotextile, filling the planting module in the holes, and clamping the tape grass in the planting holes of the filtering module.

(5) Fix two sets of wall-hanging benthophyte water purification module under water, two sets of benthophyte plant the pipe connection that the module passes through the water catch bowl, constitute one row of wall-hanging benthophyte water purification module (fig. 4), the module is topmost to gather 200mm below the minimum water level, 400mm under the module bottom plate is planted to first row of benthophyte, arrange one row of wall-hanging benthophyte water purification module again, two rows of wall-hanging benthophyte water purification modules pass through the tee bend, insert the immersible pump water inlet (fig. 6), discharge through the immersible pump. Make river water evenly get into from upper portion, through medium and benthophyte root system, get into the collector pipe, through filtering water pump discharge river course, wall-hanging benthophyte water purification module passes through modes such as nutritive salt absorption, biomembrane filtration and purifies quality of water, continuously enriches nutritive salt simultaneously and supplies the benthophyte to grow.

(6) Continuously operating for 1 month, ensuring that the planted tape grass grows normally, and changing the river water quality as follows on the basis of river aeration and sediment oxidation engineering:

TABLE 1 Water quality Change table

	COD	NH4-N	TP
				Before treatment	46.3	3.4	1.2
After 1 month of treatment	28.5	1.3	0.28

Tests show that the calamus on the emergent aquatic plant module can grow normally to form a landscape quickly, meanwhile, measures such as river aeration, bottom mud oxidation and the like are matched with shrimps, the water quality of the river is obviously improved, the operation lasts for 30 days, the COD, ammonia nitrogen and TP of the river water body are respectively reduced to 28.5mg/l, 1.3mg/l and 0.28mg/l from 46.3mg/l, 3.4mg/l and 1.2mg/l, and the earth surface IV standard is reached.

Example 3

The embodiment provides an application of a wall-mounted type submerged plant water purification module of a hard revetment.

(1) Preparation of 1.2X 0.9X 1.2m³The glass water tank is formed by mixing tail water of a sewage treatment plant with raw water and adding a part of ammonium chloride and phosphate to artificially prepare sewage.

(2) The filtration module 0.5 x 0.3 is made of PVC plate, the bottom is paved with water collecting pipes with diameter 50, the water collecting pipes are evenly perforated with holes of 6mm every 10cm, the first cover plate is a multi-grid plate, and planting holes with diameter 50 are arranged every 0.2 m.

(3) The filtering module is filled with 20mm zeolite filter materials, 20mm steel slag and 10mm biological ceramsite, and the volume ratio of the three components is 1: 1: 1.

(4) adopting a pipe with the diameter of 50pvc, forming holes with the diameter of 6mm at the periphery and the bottom, manufacturing a submerged plant planting module, wrapping the roots of the tape grass with geotextile, filling the planting module in the holes, and clamping the tape grass in the planting holes of the filtering module.

(5) The submerged plant module with the good tape grass of field planting is arranged in the water tank of joining in marriage water, and submersible pump water inlet link module collector pipe, water evenly gets into from upper portion during water pump operation, through medium and submerged plant root system, gets into the collector pipe, discharges through filtering the water pump, and submerged plant plants the module and passes through nutrient salt absorption, mode purification water quality such as biomembrane filtration, continuously enriches nutrient salt simultaneously and supplies submerged plant to grow.

(6) Aerating the water tank by using air stone and a fan to keep the dissolved oxygen above 4 mg/l.

(7) The operation is continuously carried out for 3 days, the growth of the planted tape grass is normal, and the water quality changes as follows:

TABLE 2 Water quality Change table

	COD	NH4-N	TP
				Before treatment	47.4	3.5	1.7
After running for 3d	23.1	0.25	0.3

Experiments show that the emergent aquatic plant module can obviously purify water quality, and when the emergent aquatic plant module runs for 3d, COD, ammonia nitrogen and TP in the water body of the glass water tank are respectively reduced to 23.1mg/l, 0.25mg/l and 0.3mg/l from 47.4mg/l, 3.5mg/l and 1.7 mg/l.

The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.