CN115010330B - Ecological treatment system for sewage treatment in critical zone of land-sea-land intersection - Google Patents

Abstract

The invention provides an ecological treatment system for sewage treatment in a critical zone of land-sea-land intersection, belonging to the technical field of sewage treatment. The system comprises an inflow purification area, a seawater desalination area, an ecological wet area and a water body temporary storage area which are sequentially distributed along the direction from sea to land, wherein a first transition dam is arranged between the inflow purification area and the seawater desalination area, and a second transition dam is arranged between the seawater desalination area and the ecological wet area; the ecological treatment system for sewage treatment is arranged in a key zone between the sea and the inland, and multi-stage protection is carried out on the sea water body through the water inlet purification area, the first transition dam, the seawater desalination area, the second transition dam and the ecological wet area, so that the seawater can be effectively purified, ideal growth and inhabitation environments are provided for animals and plants, the biological diversity is maintained, and the ecological environment of a coastline is restored.

Description

Ecological treatment system for sewage treatment in critical zone of land-sea-land intersection

Technical Field

The invention belongs to the technical field of sewage treatment, and particularly relates to an ecological treatment system for sewage treatment in a critical zone of land-sea-land intersection.

Background

The water body environmental pollution of the critical zone of land-sea-land intersection is caused or possibly caused by harmful effects of damaging biological resources and marine organisms, harming human health, hindering fishing and other legal marine activities, damaging the use quality of seawater, reducing the environment beauty and the like due to human activities by directly or indirectly introducing substances or energy into the marine environment (including estuarine bays).

In recent years, with the rapid development of land-sea junctional zones, which leads to changes in the environment of the region, for example, coastal habitats have changed due to large-scale reclamation, the ecological impact of coastal development on oceans has not been clarified, but it is certain that such impact is profound. In addition, the reduction of buffer areas such as wetland and intertidal zones in the land-sea intersection leads to the deterioration of self-purification function, and thus an ecosystem which is established in the land-sea intersection and purifies the marine environment is urgently required.

Disclosure of Invention

Aiming at the existing problems, the invention provides an ecological treatment system for sewage treatment in the land-sea-land convergence key zone.

The technical scheme of the invention is as follows: an ecological treatment system for sewage treatment in critical zones of land-sea-land intersection comprises an inflow purification area, a seawater desalination area, an ecological wet area and a water body temporary storage area which are sequentially distributed along the direction from sea to land, wherein a first transition dam is arranged between the inflow purification area and the seawater desalination area, and a second transition dam is arranged between the seawater desalination area and the ecological wet area;

a primary filter assembly is arranged in the water inlet purification area, a flow dispersing table is arranged on the water outlet side of the seawater desalination area, a plurality of flow dispersing holes are uniformly formed in the flow dispersing table, a plurality of planting grooves are distributed in a grid shape in the seawater desalination area, shrubs are uniformly planted in each planting groove, and mangrove plants are uniformly planted in grid-shaped areas outside the planting grooves;

the ecological wet area is internally provided with a plant floating bed layer, a planktonic middle layer in which various marine organisms are cultured and a sludge bottom layer in which microorganisms are contained in sequence from top to bottom;

the first transition dam comprises a dam body, the cross section of the first transition dam is trapezoidal, the dam body is formed by stacking stones, an impact resisting assembly is arranged at the waist position, close to the side of the water inlet purification area, of the dam body, a flow dispersing assembly is arranged at the waist position, opposite to the impact resisting assembly, of the dam body, a plurality of first filter material purification bags are stacked at the upper end of the dam body, the impact resisting assembly comprises an anti-skidding reinforcing net and a plurality of flow disturbing reinforcing blocks, the anti-skidding reinforcing net is laid at the waist position, close to the side of the water inlet purification area, of the dam body, the flow disturbing reinforcing blocks are connected with the dam body through the anti-skidding reinforcing net and spliced in a grid shape, each flow disturbing block is provided with a flow disturbing notch, flow disturbing holes are formed in each flow disturbing hole, each flow dispersing assembly comprises a plurality of flow disturbing impact plates which are arranged on the dam body in sequence along the water flow direction, and wavy flow dispersing blocking side plates are arranged between every two adjacent flow dispersing impact plates, and each flow dispersing table is arranged at the bottom position of each flow dispersing impact plate and is perpendicular to each other; the second transition dam is the same as the first transition dam in structure.

Further, just strain the subassembly including locating in the purification district of intaking and the inside prefiltration groove that is equipped with the filter screen, locate the purification district of intaking income water side and with the slope of prefiltration groove intercommunication is gone into the water passageway, is located and is kept away from in the prefiltration groove the scour protection board of slope income water passageway one side, with the groove of keeping in of prefiltration groove intercommunication, both ends evenly are equipped with a plurality of separation scattering framves about the slope passageway inner wall of intaking, be equipped with a plurality of rivers conversion mouthful on the scour protection board, after rivers get into the slope passageway of intaking, disperse rivers through separation scattering frame, tentatively reduce rivers impact force, then, when rivers get into the prefiltration inslot, can strike the scour protection board, at this moment, rivers can flow along the radian direction of rivers conversion mouthful inner wall, have changed the rivers direction, have reduced the rivers impact force once more, avoid causing the damage to the filter screen, and at last, rivers flow through the filter screen and filter, get rid of solid impurity, and flow into the sea water desalination district and carry out follow-up processing.

Furtherly, be equipped with in the sea water desalination district and drag for the leaf subassembly, drag for the leaf subassembly including cup joint in the hollow storage section of thick bamboo in the shrub and mangrove plant outside, locate hollow storage section of thick bamboo upper end just is located the stator net of shrub and mangrove plant branch bottom, hollow storage section of thick bamboo lateral wall is equipped with the clearance mouth, clearance mouth department articulates there is the cleaning door, collects shrub and mangrove plant's fallen leaves through the stator net to keep in hollow storage section of thick bamboo, then, regularly clear up through the cleaning door, avoid causing secondary pollution because of the fallen leaves to the water that purifies, reduce the sewage treatment effect.

Further, the stator net bottom can be dismantled with hollow storage cylinder upper end and be connected, when the stator net damages, convenient the change, hollow storage cylinder inner wall is equipped with the tether of being connected with bush and mangrove plant trunk, fixes hollow storage cylinder through the tether, simple structure, and convenient operation satisfies operation requirement simultaneously.

Furthermore, the plants in the plant floating bed layer comprise seawater vegetables, salicornia and an alkali tent, and the phytophagous seawater fish and the carnivorous fish are cultured in the planktonic middle layer.

Further, the vortex hole includes the vortex owner hole, locates along circumference the vortex owner hole lateral wall and with a plurality of vortex subports of vortex owner hole intercommunication, when the impact notch on rivers impact vortex reinforcement piece, in the vortex owner hole can be gone into to most, because vortex subports and vortex owner hole intercommunication, the rivers that get into in the vortex owner hole can be and disperse the form and flow in each vortex subports, disperse rivers, reduce rivers to the impact force of dam body, improve the stability of system.

Furthermore, vortex anchor block and scattered class impact plate all are connected through the reinforcement spliced pole between with the dam body, the reinforcement spliced pole is including running through vortex anchor block and anti-skidding reinforcing net and extending to the inside connection montant of dam body, locating connect on the montant and be located the inside grafting firm board of dam body, the firm lateral wall of grafting firm board evenly is equipped with a plurality of spliced poles, makes closely laminating between vortex anchor block and the dam body through the reinforcement spliced pole, avoids impacting for a long time because of rivers, makes vortex anchor block and dam body take place to break away from, inserts the inside connected mode of dam body through the spliced pole, has increased the firm nature of connection of vortex anchor block.

Further, first filter material purification bag and second filter material purification bag outside all are equipped with fixed frame, fixed frame is including locating the fixed body frame of dam body upper end, intercrossing around locating a plurality of tightening frames of fixed body frame outside, adjacent two tightening space between the frame is less than the size of first filter material purification bag and second filter material purification bag, places first filter material purification bag and second filter material purification bag in fixed body frame to alternately fix first filter material purification bag and second filter material purification bag around establishing through tightening the frame, avoid the rivers impact, cause first filter material purification bag and second filter material purification bag to drop, through injecing adjacent two space between the tightening frame is less than the size of first filter material purification bag and second filter material purification bag, avoid because of adjacent two space between the tightening frame is too big, does not play the fixed action.

Furthermore, the filter material in the first filter material purification bag is zeolite, and the filter material in the second filter material purification bag is a biological ceramsite filter material.

The invention also discloses a treatment method of the intelligent ecological treatment system for sewage treatment in the land-sea-land intersection key zone, which specifically comprises the following steps:

s1, firstly, seawater enters an inclined water inlet channel, water flow is dispersed through a separation dispersion frame, then enters a primary filter tank and impacts an anti-scouring plate, at the moment, the water flow flows out along the radian direction of the inner wall of a water flow conversion port, the flowing direction is changed, then the water flow falls onto a filter screen for filtering, solid impurities are removed, then the water flow flows into a seawater desalination area through a first transition dam, and workers clean the filter screen at regular intervals;

s2, when water flows through the first transition dam, the water flow can impact a plurality of turbulence reinforcing blocks spliced in a grid shape and enter corresponding impact recesses, at the moment, most of the water flow can impact the turbulence main holes, as the turbulence auxiliary holes are communicated with the turbulence main holes, the water flow entering the turbulence main holes can flow into each turbulence auxiliary hole in a divergent shape to disperse the water flow, then, the water flows through the first filter material purification bag to be filtered and is dispersed into a plurality of strands to flow downwards through the turbulence separation side plates, and when the water flow reaches a turbulence platform, the water flow is dispersed into a seawater desalination area through the turbulence holes to reduce impact force on shrubs and mangroves;

s3, after water flow enters a seawater desalination area, soil fixation capacity is improved through developed root systems of planted shrubs, nutrient substances N and P and certain toxic and harmful elements in the water flow are adsorbed through mangrove plants with salt and cold resistance, then the water flows through a second transition dam and enters an ecological wet area, and the process of the water flowing through the second transition dam is the same as that of the water flowing through the first transition dam;

and S4, after the water flow enters an ecological wet area, absorbing nitrogen and phosphorus nutritive salts in the water body through the plant floating bed layer to provide a dark sedimentation environment and inhibit algae outbreak, purifying the water body through marine organisms cultured in the planktonic middle layer, degrading nutritive components in the sediments through a sludge bottom layer containing microorganisms, and enabling the treated water flow to enter a temporary water body storage area.

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

(1) The ecological treatment system for sewage treatment is arranged in a key zone between the sea and the inland, and the sea water body is protected in a multi-stage manner through the water inlet purification area, the first transition dam, the seawater desalination area, the second transition dam and the ecological wet area, so that the seawater can be effectively purified, ideal growth and inhabitation environments are provided for animals and plants, the biological diversity is maintained, and the ecological environment of a coastline is restored;

(2) According to the invention, the primary filter assembly is arranged in the water inlet purification area, the impact force of water flow is primarily reduced through the separation dispersion frame, the direction of the water flow is changed through the anti-scouring plate, the impact force of the water flow is reduced again, the filter screen is prevented from being damaged, and finally, the water flow flows through the filter screen for filtration to remove solid impurities, so that the water treatment pressure of subsequent equipment is greatly relieved through the treatment process;

(3) According to the seawater desalination area, the developed root system of the planted shrubs is used for increasing the soil fixation capacity and avoiding soil loss caused by water flow impact, and the mangrove plants with salt resistance and cold resistance are used for adsorbing nutrient substances N and P and some toxic elements in water flow, so that the sewage purification effect is further enhanced;

(4) In the ecological wet area, a stable ecological environment is formed by the plant floating bed layer, the floating middle layer and the sludge bottom layer, wherein the plant floating bed layer absorbs nitrogen and phosphorus nutritive salts in a water body, provides a dark sedimentation environment, inhibits algae outbreak, purifies the water body by marine organisms cultured in the floating middle layer, degrades nutritional ingredients in sediments by the sludge bottom layer containing microorganisms, and can effectively purify seawater and restore the ecological environment of a coastline.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a top view of a seawater desalination zone of the present invention;

FIG. 3 is a schematic structural view of a drag blade assembly of the present invention;

FIG. 4 is a schematic illustration of the construction of a first transition dam of the present invention;

FIG. 5 is a structural view of a turbulence reinforcement block of the present invention;

FIG. 6 is a top view of the diffuser plate of the present invention;

figure 7 is a schematic structural view of the fixed frame of the invention;

wherein the content of the first and second substances, 1-water inlet purification area, 10-primary filter assembly, 100-primary filter tank, 1000-filter screen, 101-inclined water inlet channel, 1010-separation dispersion frame, 102-anti-scouring plate, 1020-water flow conversion port, 103-temporary storage tank, 2-seawater desalination area, 20-dispersion platform, 200-dispersion hole, 21-planting groove, 22-fishing blade assembly, 220-hollow storage cylinder, 221-guide vane net, 222-cleaning port, 223-cleaning door, 224-tether, 3-ecological wet area, 30-plant floating bed layer, 31-floating middle layer, 32-sludge bottom layer, 4-water body temporary storage area, 5-first transition dam, 50-dam body, 51-impact-resistant assembly, 510-anti-slip reinforcing net, 511-turbulence reinforcing block, 512-impact notch, 513-turbulence hole, 5130-turbulence main hole, 5131-turbulence auxiliary hole, 514-reinforcing connecting column, 5140-connecting vertical rod, 5141-plug-in stabilizing plate, 5142-plug-in stabilizing rod, 52-plug-in plug-purifying frame, 52-diffusion bag, 60-second-diffusion bag, 7-diffusion filter material bag, 7-diffusion bag, 5-blocking diffusion frame, 5-isolation frame, 5-first dam, 5-first floating auxiliary hole, 5-second dam, 5-isolation baffle-isolation dam, 50-impact-isolation dam, 51-impact-isolation dam, and second baffle-isolation bag.

Detailed Description

In order to further understand the contents of the present invention, the present invention is described in detail by examples below.

Example 1

As shown in fig. 1, an ecological treatment system for sewage treatment in critical zone of land-sea-land intersection comprises an inflow purification area 1, a seawater desalination area 2, an ecological wet area 3 and a water body temporary storage area 4 which are sequentially distributed along the direction from sea to land, wherein a first transition dam 5 is arranged between the inflow purification area 1 and the seawater desalination area 2, and a second transition dam 6 is arranged between the seawater desalination area 2 and the ecological wet area 3;

as shown in fig. 2, a primary filter assembly 10 is arranged in the water inlet purification area 1, a flow dispersing table 20 is arranged at the water outlet side of the seawater desalination area 2, 15 flow dispersing holes 200 are uniformly arranged on the flow dispersing table 20, 5 planting grooves 21 which are distributed in a grid shape are arranged in the seawater desalination area 2, shrubs are uniformly planted in each planting groove 21, and mangrove plants are uniformly planted in grid-shaped areas except the planting grooves 21;

the ecological wet area 3 is internally provided with a plant floating bed layer 30, a planktonic middle layer 31 and a sludge bottom layer 32 containing microorganisms from top to bottom in sequence; the plants in the plant floating bed layer 30 comprise seawater vegetables, salicornia and soda-water, and the phytophagous seawater fish and carnivorous fish are cultured in the floating middle layer 31;

as shown in fig. 4 and 5, the first transition dam 5 includes a dam 50 having a trapezoidal cross section and formed by stacking stones, an anti-impact component 51 is disposed at a waist position on the dam 50 near the water inlet purification area 1, a flow distribution component 52 is disposed at a waist position on the dam 50 opposite to the anti-impact component 51, 10 first filter material purification bags 53 are stacked at the upper end of the dam 50, the anti-impact component 51 includes an anti-slip reinforcing net 510 disposed at a waist position on the dam 50 near the water inlet purification area 1, 16 flow disturbance reinforcing blocks 511 connected to the dam 50 through the anti-slip reinforcing net 510 and spliced in a grid shape, each flow disturbance block 511 is provided with a disturbance notch 512, a flow disturbance hole is disposed in the disturbance notch 512, the flow distribution component 52 includes 3 flow distribution impact plates 520 disposed on the dam 50 and sequentially arranged along a water flow direction, and a wave-shaped flow disturbance side plate 521 disposed between two adjacent flow distribution impact plates 520, and the flow distribution table 20 is disposed at a bottom end of the flow distribution impact plates 520 and perpendicular to each flow distribution plate 520; the second transition dam 6 has the same structure as the first transition dam 5, and 10 second filter material purification bags 60 are stacked on the second transition dam 6;

as shown in fig. 1, the primary filter assembly 10 includes a primary filter tank 100 disposed in the inlet water purification area 1 and having a filter screen 1000 inside, an inclined inlet water channel 101 disposed on the inlet water side of the inlet water purification area 1 and communicated with the primary filter tank 100, an erosion preventing plate 102 disposed on one side of the primary filter tank 100 far from the inclined inlet water channel 101, and a temporary storage tank 103 communicated with the primary filter tank 100, wherein 5 obstructing and dispersing frames 1010 are uniformly disposed at the upper and lower ends of the inner wall of the inclined inlet water channel 101, and 10 water flow converting ports 1020 are disposed on the erosion preventing plate 102;

as shown in fig. 5, the spoiler hole 513 includes a spoiler main hole 5130, and 6 spoiler auxiliary holes 5131 circumferentially provided on a side wall of the spoiler main hole 5130 and communicating with the spoiler main hole 5130;

as shown in fig. 4, the turbulent flow reinforcing block 511 and the flow dispersing impact plate 520 are connected with the dam 50 through a reinforcing connection column 514, the reinforcing connection column 514 includes a connection vertical rod 5140 which penetrates through the turbulent flow reinforcing block 511 and the anti-slip reinforcing net 510 and extends into the dam 50, an insertion stabilizing plate 5141 which is arranged on the connection vertical rod 5140 and is positioned in the dam 50, and 3 insertion rods 5142 are uniformly arranged on the side wall of the insertion stabilizing plate 5141;

the filter material in the first filter material purification bag 53 is zeolite, and the filter material in the second filter material purification bag 60 is a biological ceramsite filter material.

Example 2

The present embodiment is different from embodiment 1 in that:

as shown in fig. 3, a leaf fishing assembly 22 is arranged in the seawater desalination area 2, the leaf fishing assembly 22 comprises a hollow storage cylinder 220 sleeved outside shrubs and mangroves, and a guide vane net 221 arranged at the upper end of the hollow storage cylinder 220 and located at the bottom ends of the shrubs and the branches of the mangroves, a cleaning opening 222 is arranged on the side wall of the hollow storage cylinder 220, and a cleaning door 223 is hinged at the cleaning opening 222;

the bottom end of the guide vane net 221 is detachably connected with the upper end of the hollow storage cylinder 220, and the inner wall of the hollow storage cylinder 220 is provided with a tether 224 connected with shrubs and mangrove plant trunks.

Example 3

The present embodiment is different from embodiment 2 in that:

as shown in fig. 7, fixing frames 7 are respectively disposed outside the first filtering material purifying bag 53 and the second filtering material purifying bag 60, each fixing frame 7 includes a fixing main frame 70 disposed at the upper end of the dam 50, and 6 tightening frames 71 disposed outside the fixing main frame 70 in a mutually intersecting and winding manner, and a gap between two adjacent tightening frames 71 is smaller than the size of the first filtering material purifying bag 53 and the second filtering material purifying bag 60.

Example 4

The embodiment discloses a treatment method of an ecological treatment system for sewage treatment in a critical zone of land-sea-land intersection in embodiment 3, which specifically comprises the following steps:

s1, firstly, seawater enters an inclined water inlet channel 101, water flow is dispersed through a separation dispersion frame 1010, then the seawater enters a primary filter tank 100 and impacts an anti-scouring plate 102, at the moment, the water flow flows out along the radian direction of the inner wall of a water flow conversion port 1020, the water flow falls onto a filter screen 1000 for filtering after the flowing direction is changed, solid impurities are removed, then the water flow flows into a seawater desalination area 2 through a first transition dam 5, and workers clean the filter screen 1000 regularly;

s2, when water flows through the first transition dam 5, the water flow can impact a plurality of turbulence reinforcing blocks 511 which are spliced in a grid shape and enter corresponding impact notches 512, at the moment, most of the water flow can impact the turbulence main holes 5130, the water flow entering the turbulence main holes 5130 can flow into each turbulence auxiliary hole 5131 in a divergent shape due to the fact that the turbulence auxiliary holes 5131 are communicated with the turbulence main holes 5130, the water flow is dispersed, then the water flows through the first filter material purifying bag 53, is filtered and is dispersed into a plurality of strands of water flow through the turbulence blocking side plates 521, and when reaching the turbulence table 20, the water flow is dispersed into the seawater desalination area 2 through the turbulence holes 200, and impact force on shrubs and mangrove plants is reduced;

s3, after the water flow enters the seawater desalination area 2, the soil fixation capacity is improved through developed roots of planted shrubs, nutrient substances N and P and certain toxic and harmful elements in the water flow are adsorbed through mangrove plants with salt and cold resistance, then the water flows through the second transition dam 6 and enters the ecological wet area 3, and the process of the water flowing through the second transition dam 6 is the same as that of the water flowing through the first transition dam 5;

s4, after the water flow enters the ecological wet area 3, nitrogen and phosphorus nutritive salts in the water body are absorbed through the plant floating bed layer 30, a dark sedimentation environment is provided, algae outbreak is inhibited, the water body is purified through marine organisms cultured in the floating middle layer 31, nutritive ingredients in sediments are degraded through the sludge bottom layer 32 containing microorganisms, and the treated water flow enters the temporary water storage area 4.

Claims (4)

1. An ecological treatment system for sewage treatment in a critical zone of land-sea-land intersection is characterized by comprising an inflow purification area (1), a seawater desalination area (2), an ecological wet area (3) and a water body temporary storage area (4) which are sequentially distributed along the direction from sea to land, wherein a first transition dam (5) is arranged between the inflow purification area (1) and the seawater desalination area (2), and a second transition dam (6) is arranged between the seawater desalination area (2) and the ecological wet area (3);

a primary filter assembly (10) is arranged in the water inlet purification area (1), a flow dispersing table (20) is arranged on the water outlet side of the seawater desalination area (2), a plurality of flow dispersing holes (200) are uniformly formed in the flow dispersing table (20), a plurality of planting grooves (21) which are distributed in a grid shape are formed in the seawater desalination area (2), shrubs are uniformly planted in each planting groove (21), and mangrove plants are uniformly planted in grid-shaped areas except the planting grooves (21);

the ecological wet area (3) is internally provided with a plant floating bed layer (30), a planktonic middle layer (31) and a sludge bottom layer (32) containing microorganisms from top to bottom in sequence;

the first transition dam (5) comprises a dam body (50) with a trapezoidal section and stacked by stones, an impact-resistant assembly (51) is arranged at a waist position on the dam body (50) close to the side of the water inlet purification area (1), a flow dispersing assembly (52) is arranged at a waist position on the dam body (50) opposite to the impact-resistant assembly (51), a plurality of first filter material purification bags (53) are stacked at the upper end of the dam body (50), the impact-resistant assembly (51) comprises an anti-slip reinforcing net (510) laid at a waist position on the dam body (50) close to the side of the water inlet purification area (1) and a plurality of flow disturbing blocks (511) connected with the dam body (50) in a grid-shaped splicing manner, each flow disturbing block (511) is provided with a striking notch (512), each striking notch (512) is internally provided with a flow dispersing hole (513), the flow dispersing assembly (52) comprises a plurality of flow dispersing boards (520) arranged on the dam body (50) and arranged in sequence along the water flow direction, and two wave-shaped flow dispersing boards (520) arranged at the bottom end of each impact-shaped flow dispersing board and each flow dispersing board (520) and each wave-shaped flow dispersing board are arranged perpendicular to each impact flow dispersing board (520); the second transition dam (6) has the same structure as the first transition dam (5), and a plurality of second filter material purification bags (60) are stacked on the second transition dam (6);

the primary filter assembly (10) comprises a primary filter tank (100) which is arranged in the water inlet purification area (1) and is internally provided with a filter screen (1000), an inclined water inlet channel (101) which is arranged on the water inlet side of the water inlet purification area (1) and is communicated with the primary filter tank (100), an erosion preventing plate (102) which is arranged in the primary filter tank (100) and is far away from one side of the inclined water inlet channel (101), and a temporary storage tank (103) which is communicated with the primary filter tank (100), wherein the upper end and the lower end of the inner wall of the inclined water inlet channel (101) are uniformly provided with a plurality of obstructing and dispersing frames (1010), and the erosion preventing plate (102) is provided with a plurality of water flow conversion ports (1020);

a leaf fishing component (22) is arranged in the seawater desalination area (2), the leaf fishing component (22) comprises a hollow storage cylinder (220) sleeved outside shrubs and mangroves, and a guide vane net (221) arranged at the upper end of the hollow storage cylinder (220) and located at the bottom ends of the branches of the shrubs and the mangroves, a cleaning opening (222) is formed in the side wall of the hollow storage cylinder (220), and a cleaning door (223) is hinged to the cleaning opening (222);

the bottom end of the guide vane net (221) is detachably connected with the upper end of a hollow storage cylinder (220), and a tether (224) connected with shrubs and mangrove plant trunks is arranged on the inner wall of the hollow storage cylinder (220);

the turbulent flow hole (513) comprises a turbulent flow main hole (5130) and a plurality of turbulent flow auxiliary holes (5131) which are arranged on the side wall of the turbulent flow main hole (5130) along the circumferential direction and communicated with the turbulent flow main hole (5130);

vortex reinforcing block (511) and the impact plate that looses and flow all are connected through consolidating spliced pole (514) between dam body (50), consolidate spliced pole (514) including running through vortex reinforcing block (511) and anti-skidding reinforcing net (510) extend to dam body (50) inside connection montant (5140), locate connect on montant (5140) and be located dam body (50) inside grafting solid board (5141), grafting solid board (5141) lateral wall evenly is equipped with a plurality of pegs graft pole (5142).

2. The ecological treatment system for critical zone sewage treatment in land-sea intersection as claimed in claim 1, wherein the plants in the plant floating bed layer (30) comprise seawater vegetables, salicornia bigelovii and soda-canopy, and the phytophagous seawater fish and carnivorous fish are cultured in the planktonic middle layer (31).

3. The ecological treatment system for sewage treatment at critical zone of land-sea-land intersection according to claim 1, wherein fixing frames (7) are respectively arranged outside the first filter material purification bag (53) and the second filter material purification bag (60), each fixing frame (7) comprises a fixing main frame (70) arranged at the upper end of the dam body (50), a plurality of tightening frames (71) which are mutually crossed and wound outside the fixing main frame (70), and the gap between every two adjacent tightening frames (71) is smaller than the size of the first filter material purification bag (53) and the size of the second filter material purification bag (60).

4. The ecological treatment system for sewage treatment in critical zone of land-sea-land intersection as claimed in claim 3, wherein the filter material in the first filter material purification bag (53) is zeolite, and the filter material in the second filter material purification bag (60) is biological ceramsite filter material.

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