CN116903194B - River and lake water ecological restoration MABC treatment system and method - Google Patents

Abstract

The present invention provides a river and lake water ecological restoration MABC treatment system and method, including a sewage regulating tank, a MABC reaction box, a secondary sedimentation tank, an air flotation machine, an upward submerged wetland purification area and a downward surface wetland purification area, wherein the sewage regulating tank receives intercepted sewage and delivers it to the MABC reaction box after treatment, the water treated by the MABC reaction box is delivered to the secondary sedimentation tank, the water treated by the secondary sedimentation tank is delivered to the air flotation machine, and the water is treated by the air flotation machine and then delivered to the upward submerged wetland purification area, and the water is treated in the upward submerged wetland purification area and then delivered to the downward surface wetland purification area. The river and lake water ecological treatment system and method provided by the present invention can make the effluent water quality meet the environmental protection water quality requirements after multi-stage purification and treatment, and solve the problem that the existing river and lake water body management scheme is not effective.

Description

MABC treatment system and method for river and lake water ecological restoration

Technical Field

The present invention relates to the technical field of water treatment, and in particular to a MABC treatment system and method for river and lake water ecological restoration.

Background technique

With the rapid development of social economy and the accelerated pace of urban modernization, a large amount of wastewater and sewage are discharged in social production and life. If these wastewater, sewage and initial rainwater are directly discharged into rivers and lakes without sufficient treatment, it will cause river and lake water environmental pollution, increase the content of aerobic organic matter, and even cause serious black and smelly problems. At present, there are many methods for river and lake water treatment. Physical and chemical methods are fast, biological methods are safe and reliable but have a long treatment cycle, and multiple methods are often used in combination to purify water.

Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a MABC treatment system and method for river and lake water ecological restoration to solve the problem that the existing river and lake water management solutions are not effective.

In order to solve the above technical problems, the present invention provides a MABC treatment system for river and lake water ecological restoration, comprising a sewage regulating tank, a MABC reaction box, a secondary sedimentation tank, an air flotation machine, an upstream subsurface flow wetland purification area and a downstream surface flow wetland purification area, wherein the sewage regulating tank receives intercepted sewage and transports it to the MABC reaction box after treatment, the water treated by the MABC reaction box is transported to the secondary sedimentation tank, the water treated by the secondary sedimentation tank is transported to the air flotation machine, and the water is treated by the air flotation machine and then transported to the upstream subsurface flow wetland purification area, and the water is treated in the upstream subsurface flow wetland purification area and then transported to the downstream surface flow wetland purification area.

The river and lake water ecological restoration MABC treatment system provided by the present invention also includes a condensation water tank, which is connected to the water inlet end of the MABC reaction box to cool the water in the MABC reaction box and then transport it back to the MABC reaction box.

The MABC treatment system for river and lake water ecological restoration provided by the present invention also includes a residual sludge pool, which is connected to the secondary sedimentation tank and the air flotation machine to receive sludge discharged from the secondary sedimentation tank and the air flotation machine respectively.

The MABC treatment system for river and lake water ecological restoration provided by the present invention also includes a snail stacker, which is connected to the sludge outlet of the residual sludge tank.

The MABC reaction box comprises: a closed box body, a water inlet filter chamber and a reaction chamber are arranged inside the closed box body, a water inlet filter grid is arranged in the water inlet filter chamber, the water inlet filter chamber is communicated with the reaction chamber, and a plurality of wound bioreactor modules are arranged in sequence in the reaction chamber, wherein each of the wound bioreactor modules comprises a first wound bioreactor membrane, a second wound bioreactor membrane, a first air inlet pipe, a second air inlet pipe, a first down-pressure impeller, and a second down-pressure impeller, the first wound bioreactor membrane and the second wound bioreactor membrane have hollow through holes in their centers respectively, and the first wound bioreactor membrane and the second wound bioreactor membrane are connected to each other. The bioreactor membranes are coaxially arranged in the vertical direction so that the two through holes are connected vertically, wherein the first wound bioreactor membrane is located at the upper part, the second wound bioreactor membrane is located at the lower part, and a gap is reserved between the first wound bioreactor membrane and the second wound bioreactor membrane; the tops of the first wound bioreactor membrane and the second wound bioreactor membrane are respectively connected to the first air inlet pipe, and the bottoms are respectively connected to the condensate collection pipe, and the condensate collection pipe is connected to the water inlet filter chamber; and a plurality of aeration pipes arranged side by side are provided below the second wound bioreactor membrane, and the bottom of the second wound bioreactor membrane is close to the aeration pipe;

The first pressure-down impeller is disposed below the liquid surface above the first wound bioreactor membrane and is coaxially arranged with the first wound bioreactor membrane, the rotation direction of the first pressure-down impeller is the same as the winding direction of the first wound bioreactor membrane, and the radius of the first pressure-down impeller is the same as the radius of the first wound bioreactor membrane;

The second pressure-down impeller is disposed between the second wound bioreactor membrane and the first wound bioreactor membrane and is coaxially arranged with the second wound bioreactor membrane. The radius of the second pressure-down impeller is equal to the radius of the through hole of the second wound bioreactor membrane. The motor of the second pressure-down impeller is arranged in the through hole of the first wound bioreactor membrane.

Correspondingly, horizontal supports are arranged above the first wound bioreactor membrane and between the first wound bioreactor membrane and the second wound bioreactor membrane, and the first and second downward pressure impellers are fixed on the corresponding horizontal supports.

The first wound bioreactor membrane is spirally wound, and the membrane cavity of the first wound bioreactor membrane is filled with porous expansion materials, so that a membrane cavity with an equal distance is formed between the two sides of the first wound bioreactor membrane; both sides of the first wound bioreactor membrane are reaction membrane bodies; the air inlet pipe and the condensed water collection pipe are respectively connected to the membrane cavity. The second wound bioreactor membrane is spirally wound, and the winding direction and radius are the same as those of the first wound bioreactor membrane, and the vertical length of the second wound bioreactor membrane is greater than that of the first wound bioreactor membrane.

The rotation direction of the first downward pressure impeller is opposite to the winding direction of the first wound bioreactor membrane, so that a part of the sewage can enter the interlayer gap of the first wound bioreactor membrane downward from the top of the first wound bioreactor membrane, and converge to the through hole in the center along the reverse rotation flow of the first wound bioreactor membrane, and the other part can flow downward through the interlayer gap of the first wound bioreactor membrane, and flow to the gap between the first wound bioreactor membrane and the second wound bioreactor membrane, so as to form downward pressure on the second wound bioreactor membrane; and enter the through hole of the second wound bioreactor membrane under the action of the second downward pressure impeller, and the rotation direction of the second downward pressure impeller is the same as the winding direction of the second wound bioreactor membrane, so that a part of the sewage can flow to the outside in a winding manner along the interlayer gap of the second wound bioreactor membrane, and the other part can flow downward through the interlayer gap of the second wound bioreactor membrane and flow to the aeration pipe at the bottom, so as to be fully mixed with the gas escaping from the aeration pipe, thereby improving the efficiency of aeration mixing.

The outer surface of the reaction membrane body is attached with an aerobic microorganism layer, an anoxic microorganism layer and an anaerobic microorganism layer from the inside to the outside.

The MABC treatment method for river and lake water ecological restoration includes:

The sewage regulating tank receives intercepted sewage, treats it, and then delivers it to the MABC reaction tank;

The sewage is treated by the MABC reaction tank and then transported to the secondary sedimentation tank;

The sewage is settled in the secondary sedimentation tank, and then the treated sewage is transported to the flotation machine;

The air flotation machine treats the sewage and then delivers the clean water to the upstream submerged wetland purification area;

The clean water is further purified by the upstream subsurface wetland purification area and then transported to the downstream surface wetland purification area;

The clean water is purified by the downstream surface wetland purification area and then transported to rivers and lakes.

The MABC treatment method for river and lake water ecological restoration provided by the present invention also includes:

The condensation water tank cools down the sewage in the MABC reaction tank and then returns it to the MABC reaction tank.

The MABC treatment method for river and lake water ecological restoration provided by the present invention also includes:

The settled sludge obtained from the secondary sedimentation tank and the flotation sludge obtained from the flotation machine are transported to the residual sludge tank.

The river and lake water ecological treatment method provided by the present invention also includes:

The sludge is transported from the residual sludge tank to the screw stacker.

The river and lake water ecological treatment system and method provided by the present invention can make the effluent water quality meet environmental protection water quality requirements after multi-stage purification and treatment, solving the problem of poor effect of existing river and lake water treatment solutions.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a process structure and flow chart of the MABC treatment system for river and lake water ecological restoration according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the top plan structure of the MABC reaction box according to an embodiment of the present invention.

FIG3 is a schematic diagram of the bottom plan view of the MABC reaction box according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of the side structure of the MABC reaction box according to an embodiment of the present invention.

FIG. 5 is a schematic structural diagram of the winding bioreactor module according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of the three-dimensional structure of the wound bioreactor membrane according to an embodiment of the present invention.

FIG. 7 is a schematic diagram of the layer cross-sectional structure of the wound bioreactor membrane according to an embodiment of the present invention.

Detailed ways

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and/or" used herein includes any and all combinations of one or more related listed items.

As shown in Figures 1-7, the present invention provides a MABC treatment system for river and lake water ecological restoration, including a sewage regulating tank 1, a MABC reaction box 2, a secondary sedimentation tank 3, an air flotation machine 4, an upstream submerged flow wetland purification area 5 and a downstream surface flow wetland purification area 6, wherein the sewage regulating tank receives intercepted sewage and transports it to the MABC reaction box after treatment, the water treated by the MABC reaction box 2 is transported to the secondary sedimentation tank 3, the water treated by the secondary sedimentation tank 3 is transported to the air flotation machine, and the air flotation machine 4 treats the water and then transports it to the upstream submerged flow wetland purification area 5, and after the water is treated in the upstream submerged flow wetland purification area 5, it is transported to the downstream surface flow wetland purification area 6.

The MABC treatment system for river and lake water ecological restoration provided by the present invention also includes a condensation water tank 7, which is connected to the water inlet end of the MABC reaction box 2 to cool the water in the MABC reaction box 2 and then transport it back to the MABC reaction box 2.

The MABC treatment system for river and lake water ecological restoration provided by the present invention further comprises a residual sludge pool 8, which is connected to the secondary sedimentation tank 3 and the flotation machine 4 to receive sludge discharged from the secondary sedimentation tank 3 and the flotation machine 4 respectively.

The MABC treatment system for river and lake water ecological restoration provided by the present invention further comprises a snail stacking machine 9, and the snail stacking machine 9 is connected to the sludge outlet of the residual sludge tank.

The MABC reaction box 2 comprises: a closed box body, a water inlet filter chamber 21 and a reaction chamber are arranged inside the closed box body, a water inlet filter grid is arranged in the water inlet filter chamber, the water inlet filter chamber is connected with the reaction chamber, the water inlet filter grid arranged in the water inlet filter chamber can filter the water and filter the suspended matter and particulate matter in the water, and the water inlet filter grid adopts a louver-type grid structure, such as the rainwater filter grid disclosed in CN104105832A.

A plurality of wound bioreactor modules 22 are sequentially arranged in the reaction chamber, wherein each of the wound bioreactor modules 22 comprises a first wound bioreactor membrane 221, a second wound bioreactor membrane 222, a first air inlet pipe, a second air inlet pipe, a first down-pressure impeller 223, and a second down-pressure impeller 224, wherein the first wound bioreactor membrane 221 and the second wound bioreactor membrane 222 have a hollow through hole 220 in the center, and the first wound bioreactor membrane and the second wound bioreactor membrane are coaxially arranged in the vertical direction so that the two through holes are connected vertically ... The biological reaction membrane 221 is located at the upper part, and the second wound biological reaction membrane 222 is located at the lower part, and a gap is reserved between the first wound biological reaction membrane 221 and the second wound biological reaction membrane 222; the tops of the first wound biological reaction membrane 221 and the second wound biological reaction membrane 222 are respectively connected to the first air inlet pipe, and the bottoms are respectively connected to the condensate collection pipe 228, and the condensate collection pipe 228 is connected to the water inlet filter chamber 21; the condensate collection pipe 228 can collect the water condensed in the membrane cavity of the biological reaction membrane to avoid water accumulation in the membrane cavity, and quickly discharge the water into the water inlet filter chamber 21.

In addition, a plurality of aeration tubes 229 arranged side by side are provided below the second wound bioreactor membrane, and the bottom of the second wound bioreactor membrane is close to the aeration tubes 229; a microporous mesh membrane that is air-permeable but not water-permeable is provided on the aeration tubes 229, and the gas pressure in the aeration tubes 229 is slightly greater than the water pressure at the location of the aeration tubes 229, so that the gas molecules can escape slowly, and the aeration tubes 229 are connected to an external pressurized air pump.

The first pressure-down impeller 223 is disposed below the liquid surface above the first wound bioreactor membrane and is coaxially arranged with the first wound bioreactor membrane. The rotation direction of the first pressure-down impeller is the same as the winding direction of the first wound bioreactor membrane, and the radius of the first pressure-down impeller is the same as the radius of the first wound bioreactor membrane.

The second pressure-down impeller 224 is disposed between the second wound bioreactor membrane and the first wound bioreactor membrane and is coaxially arranged with the second wound bioreactor membrane. The radius of the second pressure-down impeller is equal to the radius of the through hole of the second wound bioreactor membrane. The motor of the second pressure-down impeller is arranged in the through hole of the first wound bioreactor membrane.

Correspondingly, horizontal supports are arranged above the first wound bioreactor membrane 221 and between the first wound bioreactor membrane 221 and the second wound bioreactor membrane 222, and the first downward pressure impeller 223 and the second downward pressure impeller 224 are fixed on the corresponding horizontal supports.

The first wound bioreactor membrane 221 is spirally wound, and the membrane cavity of the first wound bioreactor membrane 221 is filled with porous expansion material, so that a membrane cavity with an equal distance is formed between the two sides of the first wound bioreactor membrane 221; both sides of the first wound bioreactor membrane 221 are air-permeable but water-impermeable reaction membrane bodies; the air inlet pipe and the condensed water collection pipe are respectively connected to the membrane cavity. The second wound bioreactor membrane 222 is spirally wound, and the winding direction and radius are the same as those of the first wound bioreactor membrane 221, and the vertical length of the second wound bioreactor membrane 222 is greater than that of the first wound bioreactor membrane 221. More preferably, the vertical length of the second wound bioreactor membrane 222 is about twice that of the first wound bioreactor membrane 221, so that the path for the sewage to flow downward in the interlayer gap of the first wound bioreactor membrane 221 is shorter, and better pressure is applied to the second wound bioreactor membrane 222. The longer vertical length of the second wound bioreactor membrane also makes the sewage stay longer in the interlayer gap of the second wound bioreactor membrane 222, so that the sewage can be better purified.

The rotation direction of the first down-pressure impeller 223 is opposite to the winding direction of the first wound bioreactor membrane, so that a part of the sewage flows downward from the top of the first wound bioreactor membrane 221 into the interlayer gap of the first wound bioreactor membrane, and converges along the reverse rotation flow toward the through hole in the center of the first wound bioreactor membrane 221, and the other part can flow downward through the interlayer gap of the first wound bioreactor membrane 221 and flow into the gap between the first wound bioreactor membrane 221 and the second wound bioreactor membrane 222 to regulate the second wound bioreactor membrane. The membrane 222 forms downward pressure; and under the action of the second downward pressure impeller 224, the sewage enters the through hole of the second wound bioreactor membrane. The rotation direction of the second downward pressure impeller 224 is the same as the winding direction of the second wound bioreactor membrane 222, so that a part of the sewage can flow to the outside in a winding manner along the interlayer gap of the second wound bioreactor membrane 222, and the other part can flow downward through the interlayer gap of the second wound bioreactor membrane 222 and flow to the aeration pipe at the bottom, so as to be fully mixed with the gas escaping from the aeration pipe 229, thereby improving the efficiency of aeration mixing.

The outer surface of the reaction membrane body is attached with an aerobic microbial layer, an anoxic microbial layer and an anaerobic microbial layer from the inside to the outside. Since the air first enters the aerobic microbial layer, the microorganisms in the aerobic microbial layer can purify the water quality. Then, after a certain amount of oxygen is consumed, it reaches the anoxic microbial layer, and the microorganisms in the anoxic microbial layer purify the water quality. When the oxygen is consumed, the microorganisms in the anaerobic microbial layer purify the water quality. The microbial layer attached to the outer surface of the reaction membrane body is formed by cultivation. Usually, the sludge is passed into the MABC reaction box and cultivated for a period of time to form a stable microbial community.

The present invention also discloses a MABC treatment method for river and lake water ecological restoration, comprising:

The sewage regulating tank receives intercepted sewage, treats it, and then delivers it to the MABC reaction tank;

The sewage is treated by the MABC reaction tank and then transported to the secondary sedimentation tank;

The sewage is settled in the secondary sedimentation tank, and then the treated sewage is transported to the flotation machine;

The air flotation machine treats the sewage and then delivers the clean water to the upstream submerged wetland purification area;

The clean water is further purified by the upstream subsurface wetland purification area and then transported to the downstream surface wetland purification area;

The clean water is purified by the downstream surface wetland purification area and then transported to rivers and lakes.

The MABC treatment method for river and lake water ecological restoration provided by the present invention also includes:

The condensation water tank cools down the sewage in the MABC reaction tank and then returns it to the MABC reaction tank.

The MABC treatment method for river and lake water ecological restoration provided by the present invention also includes:

The settled sludge obtained from the secondary sedimentation tank and the flotation sludge obtained from the flotation machine are transported to the residual sludge tank.

The river and lake water ecological treatment method provided by the present invention also includes:

The sludge is transported from the residual sludge tank to the screw stacker.

The MABC treatment system and method for river and lake water ecological restoration provided by the present invention can make the effluent water quality meet environmental protection water quality requirements after multi-stage purification and treatment, and solve the problem that the existing river and lake water body treatment solutions are not effective.

The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims (11)

1. A MABC treatment system for river and lake water ecological restoration, comprising a sewage regulating tank, a MABC reaction tank, a secondary sedimentation tank, an air flotation machine, an upstream subsurface wetland purification area and a downstream surface wetland purification area, wherein the sewage regulating tank receives intercepted sewage and delivers it to the MABC reaction tank after treatment, the water treated by the MABC reaction tank is delivered to the secondary sedimentation tank, the water treated by the secondary sedimentation tank is delivered to the air flotation machine, and the water is treated by the air flotation machine and then delivered to the upstream subsurface wetland purification area, and the water is treated in the upstream subsurface wetland purification area and then delivered to the downstream surface wetland purification area; The MABC reaction box comprises: a closed box body, a water inlet filter chamber and a reaction chamber are arranged inside the closed box body, a water inlet filter grid is arranged in the water inlet filter chamber, the water inlet filter chamber is communicated with the reaction chamber, and a plurality of wound bioreactor modules are arranged in sequence in the reaction chamber, wherein each of the wound bioreactor modules comprises a first wound bioreactor membrane, a second wound bioreactor membrane, a first air inlet pipe, a second air inlet pipe, a first down-pressure impeller, and a second down-pressure impeller, the first wound bioreactor membrane and the second wound bioreactor membrane respectively have a hollow through hole in their centers, and the first wound bioreactor membrane and the second wound bioreactor membrane are connected to each other. The bioreactor membranes are coaxially arranged in the vertical direction so that the two through holes are connected vertically, wherein the first wound bioreactor membrane is located at the upper part, the second wound bioreactor membrane is located at the lower part, and a gap is reserved between the first wound bioreactor membrane and the second wound bioreactor membrane; the tops of the first wound bioreactor membrane and the second wound bioreactor membrane are respectively connected to the first air inlet pipe, and the bottoms are respectively connected to the condensate collection pipe, and the condensate collection pipe is connected to the water inlet filter chamber; and a plurality of aeration pipes arranged side by side are provided below the second wound bioreactor membrane, and the bottom of the second wound bioreactor membrane is close to the aeration pipe; The first pressure-down impeller is arranged below the liquid surface above the first wound bioreactor membrane and is coaxially arranged with the first wound bioreactor membrane. The rotation direction of the first pressure-down impeller is the same as the winding direction of the first wound bioreactor membrane, and the radius of the first pressure-down impeller is the same as the radius of the first wound bioreactor membrane. The second pressure-down impeller is disposed between the second wound bioreactor membrane and the first wound bioreactor membrane and is coaxially arranged with the second wound bioreactor membrane. The radius of the second pressure-down impeller is equal to the radius of the through hole of the second wound bioreactor membrane. The motor of the second pressure-down impeller is arranged in the through hole of the first wound bioreactor membrane. The first wound bioreactor membrane is spirally wound, and the membrane cavity of the first wound bioreactor membrane is filled with porous expansion materials, so that membrane cavities with equal distances are formed between the two sides of the first wound bioreactor membrane; the two sides of the first wound bioreactor membrane are both air-permeable but water-impermeable reaction membrane bodies; the air inlet pipe and the condensed water collection pipe are respectively connected to the membrane cavity. 2. The MABC treatment system for river and lake water ecological restoration according to claim 1 is characterized in that it also includes a condensation water tank, which is connected to the water inlet end of the MABC reaction box to cool the water in the MABC reaction box and then transport it back to the MABC reaction box. 3. The MABC treatment system for river and lake water ecological restoration according to claim 1 is characterized in that it also includes a residual sludge pool, which is connected to the secondary sedimentation tank and the flotation machine to receive the sludge discharged from the secondary sedimentation tank and the flotation machine respectively. 4. The MABC treatment system for river and lake water ecological restoration according to claim 3 is characterized in that it also includes a snail stacker, which is connected to the sludge outlet of the residual sludge tank. 5. The MABC treatment system for river and lake water ecological restoration according to claim 1 is characterized in that: Horizontal supports are arranged above the first wound bioreactor membrane and between the first wound bioreactor membrane and the second wound bioreactor membrane, respectively. The first downward pressure impeller and the second downward pressure impeller are fixed on the corresponding horizontal supports. 6. The MABC treatment system for river and lake water ecological restoration according to claim 5 is characterized in that: The second wound bioreactor membrane is spirally wound, and the winding direction and radius are the same as those of the first wound bioreactor membrane. The vertical length of the second wound bioreactor membrane is greater than that of the first wound bioreactor membrane. 7. The MABC treatment system for river and lake water ecological restoration according to claim 6 is characterized in that: The outer surface of the reaction membrane body is attached with an aerobic microorganism layer, an anoxic microorganism layer and an anaerobic microorganism layer from the inside to the outside. 8. A method for treating river and lake water ecology, based on the MABC treatment system for river and lake water ecological restoration according to any one of claims 1 to 7, comprising: The sewage regulating tank receives intercepted sewage, treats it, and then delivers it to the MABC reaction tank; The sewage is treated by the MABC reaction tank and then transported to the secondary sedimentation tank; The sewage is settled in the secondary sedimentation tank, and then the treated sewage is transported to the flotation machine; The air flotation machine treats the sewage and then delivers the clean water to the upstream submerged wetland purification area; The clean water is further purified by the upstream subsurface wetland purification area and then transported to the downstream surface wetland purification area; The clean water is purified by the downstream surface wetland purification area and then transported to rivers and lakes. 9. The method for treating river and lake water ecology according to claim 8, characterized in that it also comprises: The condensate water tank collects water from the condensate water collection pipeline; And, the condensate tank delivers the condensate to the sewage regulating tank. 10. The method for treating river and lake water ecology according to claim 8, characterized in that it also comprises: The settled sludge obtained from the secondary sedimentation tank and the floating sludge obtained from the flotation machine are transported to the residual sludge tank; And, the return sludge is transported from the secondary sedimentation tank to the MABC reaction box. 11. The method for treating river and lake water ecology according to claim 8, characterized in that it also comprises: The sludge is transported from the residual sludge tank to the screw stacker.