CN113249191B - In-situ anaerobic fermentation integrated device and urban and rural river and lake water surface algae pollution prevention and control planning method - Google Patents
In-situ anaerobic fermentation integrated device and urban and rural river and lake water surface algae pollution prevention and control planning method Download PDFInfo
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Abstract
The utility model discloses an in-situ anaerobic fermentation integrated device and a planning method for preventing and controlling algae pollution on water surfaces of urban and rural rivers and lakes, which belong to the technical field of algae treatment devices and are used for solving the problems that a salvaging and treating device in a water body algae salvaging technology is high in construction cost, large in occupied area, incapable of moving positions and unscientific in salvaging, preventing and controlling and planning, and comprise a top film, a bottom film, a feeding pipe, an air duct, a liquid discharge pipe, a slag discharge port, a floating anti-collision protecting device and a traction device; the top film and the bottom film are flexible films; the lower surface of the top film and the upper surface of the bottom film are provided with enclosed synthetic sealed flexible air bags, the edges of the air bags are pressed into a whole, and the air bags are used for containing biogas residues, biogas slurry and biogas generated by algae fermentation; one end of the feed pipe is arranged in the air bag, and the other end of the feed pipe is arranged outside the air bag; one end of the air duct is arranged in the center of the air bag near the vertex and above the biogas slurry liquid level, and the other end of the air duct is arranged at the outer side of the air bag and connected with the biogas collecting device; one end of the liquid discharge pipe is arranged in the air bag, and the other end of the liquid discharge pipe is arranged outside the air bag; the slag discharge port is provided with a closed flange; the traction device is movably connected with the air bag. The scheme of the utility model has small occupied area, low cost, movable and foldable storage and scientific salvage route planning.
Description
Technical Field
The utility model relates to the technical field of algae treatment devices, in particular to a movable algae fermentation device.
Background
In recent years, along with the high-speed development of industrial level, especially in the context of climate warming, serious environmental problems are highlighted, and a great amount of water is generated to generate eutrophication phenomena, and a great amount of algae bloom grows out of the eutrophicated water body to rapidly reproduce, so that a great amount of dissolved oxygen is consumed, the transparency of the water is reduced, sunlight is hard to penetrate through a water layer, the dissolved oxygen of the water body is further reduced, fish and shrimp die, serious pollution is caused to the water body, serious harm is caused to water organisms, and serious threat is presented to human health. In the past, various coping methods are developed for the threat of algal bloom to the environment, and main treatment technologies comprise mechanical salvage, physical methods, chemical methods and the like. The mechanical method is low in salvaging efficiency, and the influence of water surface wind power on floating algae is not considered, for example, the salvaging is performed by using a suction pump; the physical method has high cost for periodically disinfecting water, replacing new water and the like, and has very little effect on large-area algae bloom; the chemical agent is put into the water body, so that the algae propagation is inhibited, but at the same time, the chemical agent causes secondary pollution to the environment and can accumulate in aquatic animals to cause moderate accumulation, and the aquatic animals finally reach the human body through a food chain to endanger the health of the human body.
The offshore salvaging process is an improved algae removing process aiming at the problems, a salvaging ship and an automatic algae collecting mechanism are arranged in a river, a pressurizing mechanism, an air floatation tank, a centrifugal dehydration mechanism, a sedimentation tank and a purifying wetland are arranged on the river bank for treating the blue algae salvaged on the river bank, as described in the Chinese patent of patent number CN212713006U, the technology solves the pollution hazard of chemical algae removal but needs to build a large-scale blue algae treating device on the river bank, a large amount of land is occupied and cannot move as required, and the salvaging ship, the automatic algae collecting mechanism and the like occupy space. The movable salvaging device is a multidirectional floating blue algae suction device, the salvaging device is moved through the foam floating body, as described in Chinese patent publication No. CN205188922U, the device can move anywhere, but still occupies a large amount of space, and the salvaged blue algae still need to be towed to the shore for treatment.
Disclosure of Invention
The technical problem to be solved by the utility model is that the blue algae salvaging and processing device in the prior art has high construction cost, occupies a large amount of land and cannot move according to the blue algae burst position; after the blue algae bloom disappears, the equipment and the device can not be folded and stored, and still occupy a large area of land and storage space.
The utility model provides an in-situ anaerobic fermentation integrated device for algae, which is applied to salvage, collection and fermentation treatment of algal bloom in river and lake water bodies and comprises a top film, a bottom film, a feed pipe, an air duct, a liquid discharge pipe, a slag discharge port, a floating anti-collision protection device and a traction device; the top film and the bottom film are flexible films; the lower surface of the top film and the upper surface of the bottom film are oppositely and hermetically arranged to enclose a closed flexible space air bag, the top film and the edge of the bottom film are pressed into a whole, and the air bag is used for containing biogas residues, biogas slurry and biogas generated by algae fermentation; one end of the feed pipe is arranged in the air bag and extends below the liquid level of the biogas slurry in the air bag, and the other end of the feed pipe is arranged outside the air bag; one end of the air duct is arranged in the position, close to the vertex, of the inner center of the air bag and above the biogas slurry liquid level, and the other end of the air duct is arranged on the outer side of the air bag and connected with the biogas collecting device; one end of the liquid discharge pipe is arranged in the air bag and extends below the liquid level of the biogas slurry, and the other end of the liquid discharge pipe is arranged outside the air bag; the slag discharge port is provided with a closed flange; the traction device is movably connected with the air bag.
Further, the upper half section of the feeding pipe is a rigid pipe, a spiral auger pushing feeding is arranged, the lower half section of the feeding pipe is a flexible pipe, and the end part close to the pipeline is externally connected with a floating ball; the liquid discharge pipe is arranged at one end of the air bag and is externally connected with a floating ball.
Further, the top film and the bottom film are at least one layer of flexible film and airtight, and the material is one selected from a plastic film, a rubber film, a latex film, a carbon fiber film, a plastic metal composite film, a plastic composite film and a plastic fiber film.
Preferably, the top film and the bottom film are geomembranes.
Further, the sealing and pressing mode of the edges of the top film and the bottom film can be one of cold pressing, hot pressing, high-frequency pressing and ultrasonic pressing.
Further, the device comprises a diaphragm, wherein the diaphragm is arranged between the top film and the bottom film, the upper surface of the diaphragm is opposite to the lower surface of the top film, the lower surface of the diaphragm is opposite to the upper surface of the bottom film, and biogas slurry and biogas residues of an air bag are filled in a space between the diaphragm and the bottom film; the edge of the top film, the edge of the diaphragm and the edge of the bottom film are pressed together into a whole; the diaphragm is a waterproof breathable film.
Preferably, the aperture of the membrane hole of the membrane is 0.1-1.0 mu m; the material is at least one selected from polytetrafluoroethylene, polypropylene, polyethylene, polyvinyl chloride and polyurethane.
Further, the top film, the separator and the bottom film may be transparent or opaque, respectively, and the top film, the separator and the bottom film may be the same or different in color.
Preferably, the top film is colorless and transparent, the separator is black, and the bottom film is black.
In another aspect of the utility model, a method for controlling and planning algae pollution on water surfaces of urban, rural, river and lake by using the algae in-situ anaerobic integrated device is provided, which comprises the following steps,
collecting a soil sample of a near-shore river and lake, and measuring the nitrogen and phosphorus element contents of the soil sample;
determining an aggregation area of algal bloom in a water body according to the hydrologic form of rivers and lakes, the wind direction of surface wind power, the topography and topography of a near-shore region and the distribution of nitrogen and phosphorus in a collected and obtained near-shore soil sample;
formulating a water surface algae cleaning route by combining local climate change;
according to the algae cleaning route, the traction device pulls the floating air sac type river and lake algae ecological in-situ treatment device to clean the algae on the water surface.
The working principle of the utility model is as follows: the device provided by the utility model is an alga in-situ anaerobic fermentation integrated device, algae bloom is collected in a water body near a river, after the algae bloom is exploded on the water body surface, the device is moved into the water body surface to be treated, the flexible top film 1 and the flexible bottom film 2 of the device form a closed flexible air bag cavity, algae on the water body surface are moved into an air bag through the feed pipe 3 for fermentation to generate marsh gas, biogas residues and biogas slurry, one end of the feed pipe 3 in the air bag enters below the liquid level of the biogas slurry, therefore, the feed pipe 3 and the air bag form a closed space, preferably, the upper half section of the feed pipe 3 is a rigid pipe, a spiral auger is arranged for pushing the feed material, the collected algae is conveniently pushed into the cavity of the air bag through the feed pipe 3, the lower half section is a flexible pipe, the end close to the pipeline is externally connected with a floating ball, and when the liquid level of the biogas slurry is lower than one end in the air bag of the feed pipe 3, the air bag is blocked by the floating ball, so that the tightness of the air bag is ensured. Similarly, one end of the liquid discharge pipe 5 is arranged inside the air bag and extends below the liquid level of the biogas slurry, the other end of the liquid discharge pipe is arranged outside the air bag, preferably, one end of the liquid discharge pipe 5 arranged inside the air bag can be externally connected with a floating ball, and when the liquid level of the biogas slurry is lower than one end of the liquid discharge pipe 5 in the air bag, the floating ball can seal one end of the feed pipe in the air bag
Furthermore, because the density of the biogas is low, the biogas generated by fermentation is gathered upwards at a high point at the top of the air bag, so one end of the air duct 4 is arranged at the position, close to the top point, of the inner center of the air bag and above the liquid level of the biogas slurry, and the other end of the air duct is arranged at the outer side of the air bag and is connected with the biogas collecting device, so that the biogas is conveniently discharged and collected. The slag discharge port 6 is provided with a closed flange, when algae in the current water body are removed and fermented, the device is towed to the shore, the flange is opened, and the internal biogas residues are removed; in addition, the air bag of the device is not required to be provided with a flange, and a suction pump is arranged at the liquid discharge pipe 5 and is used for pumping out biogas residues or biogas liquid. The membrane 9 can be arranged between the top membrane 1 and the bottom membrane 2 of the device, the membrane 9 is a waterproof and breathable membrane, and the function of the membrane 9 is that biogas generated by algae fermentation can permeate, and biogas residues and biogas slurry generated by fermentation cannot permeate, so that the biogas can permeate the membrane 9 and enter a cavity formed by the membrane 9 and the top membrane 1, and is led out of the air bag through the air duct 4 and is collected through an external biogas collecting device; biogas residues and biogas slurry generated by algae fermentation cannot permeate through the membrane 9, so that the biogas residues and biogas slurry are stored in a cavity formed by the membrane 9 and the bottom membrane 2 and are led out through the drain pipe 5 and the slag discharge port 6, meanwhile, biogas generated by algae fermentation can also help the device to float on the water surface, in addition, as the top membrane 1 is colorless and transparent, the membrane 8 is black, the bottom membrane 2 is black, sunlight irradiates the black membrane 8 through the top membrane 1, so that the black membrane 8 absorbs sunlight heat, the temperature of a closed cavity formed by the black membrane 8 and the black bottom membrane 2 is increased, the temperature is kept, and a closed space is needed for anaerobic fermentation, so that the anaerobic fermentation of algae in the cavity is promoted in the closed air bag cavity. Biogas slurry generated by fermentation can be collected and transported along with a pipeline at regular intervals, and the biogas slurry can be pumped to shore greening planting or facility agriculture water and fertilizer integration at regular intervals. After the algae in the current water body are removed and fermented, the device can be folded due to the flexibility, and transported to the surfaces of other water bodies to be continuously removed, and after the seasonal algae bloom is finished, the device can be folded for storage, so that the occupied space is small, and the transportation and the storage are convenient.
The method for planning the pollution control of algae on the water surfaces of urban and rural rivers and lakes by using the algae in-situ anaerobic fermentation integrated device comprises the following steps of:
s100, collecting a soil sample of a near-shore river and lake, and determining the content of nitrogen and phosphorus elements in the soil sample;
s200, determining an aggregation area of algal bloom in a water body according to the hydrologic form of rivers and lakes, the wind direction of the surface wind, the topography and the topography of a near-shore region and the distribution of nitrogen and phosphorus in a collected near-shore soil sample;
s300, formulating a water surface algae cleaning route by combining local climate change;
s400, according to the algae cleaning route, the traction device pulls the floating air bag type river and lake algae ecological in-situ treatment device to clean algae on the water surface.
The utility model has the beneficial effects that the floating air bag for fishing algae is in-situ floating, thereby saving the occupied area and reducing the fishing cost; the water seal type feeding is carried out, and the salvaged algae directly enter the position below the liquid level of the air bag, so that the anaerobic sealing effect in the air bag is ensured; the upper film is a transparent film, the diaphragm is a black film, sunlight can penetrate through the transparent upper film and irradiate the black diaphragm, and the black diaphragm absorbs the sunlight to improve the temperature of fermentation liquid of the air bag and the anaerobic fermentation effect; the upper and lower sealing impermeable films are convenient for collecting methane due to textile water pollution; biogas generated by fermentation can be transported along with a pipeline at any time; biogas slurry can be regularly pumped to the coast to supply water and fertilizer for greening planting or facility agriculture.
Drawings
FIG. 1 is a schematic structural view of an in-situ anaerobic fermentation integrated device according to the present utility model
FIG. 2 is a schematic structural view of an in-situ anaerobic fermentation integrated device with a diaphragm according to the present utility model
FIG. 3 shows the steps of the method for controlling algae pollution on the water surfaces of urban and rural rivers and lakes
In the figure: 1. a top film; 2. a base film; 3. a feed pipe; 4. an air duct; 5. a liquid discharge pipe; 6. a slag discharge port; 7. a floating anti-collision protection device; 8. a traction device; 9. a diaphragm; 31. a spiral auger; 32. and a floating ball.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the present exemplary embodiments generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Example 1
As shown in fig. 1, the floating anti-collision device comprises a top film 1, a bottom film 2, a feeding pipe 3, an air duct 4, a liquid discharge pipe 5, a slag discharge port 6, a floating anti-collision protection device 7 and a traction device 8; the top film and the bottom film are flexible films and can float on the water surface of the water body; the lower surface of the top film 1 and the upper surface of the bottom film 2 are oppositely arranged in a sealing way, a closed flexible space air bag is enclosed, the top film 1 and the edge of the bottom film 2 are pressed into a whole, and the air bag is used for containing biogas residues, biogas slurry and biogas generated by algae fermentation; one end of the feed pipe 3 is arranged inside the air bag and extends below the liquid level of the biogas slurry inside the air bag, and the other end of the feed pipe is arranged outside the air bag; one end of the air duct 4 is arranged in the position, close to the vertex, of the inner center of the air bag and above the biogas slurry liquid level, and the other end of the air duct is arranged on the outer side of the air bag and connected with a biogas collecting device; one end of the liquid discharge pipe 5 is arranged in the air bag and extends below the liquid level of the biogas slurry, and the other end of the liquid discharge pipe is arranged outside the air bag; the slag discharge port 6 is provided with a closed flange; the traction device 7 is connected with the air bag. The positions of the feed pipe 3, the air duct 4 and the liquid discharge pipe 5, which are respectively in contact with the upper film or the lower film of the air bag, are in sealing contact, one end of the feed pipe is arranged outside the air bag, the other end of the feed pipe is arranged outside the air bag, one end of the air duct 4, which is arranged outside the air bag, is connected with an external gas storage device, and is used for guiding gas generated by algae fermentation inside the air bag to the external gas storage device through the air duct 4; and one end of the inner part of the air bag of the feed pipe 3 and the liquid discharge pipe 4 enters below the liquid level of the biogas slurry, and the inner part of the air bag is of a sealing structure. The other preferable scheme of the utility model is that the air bag is not provided with a slag discharge port, and a suction pump is arranged at the liquid discharge pipe to discharge biogas slag generated by fermentation through the suction pump of the liquid discharge pipe.
Further, the upper half section of the feeding pipe 3 is a rigid pipe, a spiral auger 31 is arranged for pushing the feeding, the lower half section is a flexible pipe, and the end part close to the pipeline is externally connected with a floating ball 32; the drain pipe 5 sets up in the external floater of the inside one end of gasbag, and the effect of floater can guarantee that inlet pipe 3 and drain pipe 5 seal with the gasbag external world all the time on the one hand, on the other hand can guarantee that algae normal position anaerobic fermentation integrated device floats on the surface of water.
Further, the top film 1 and the bottom film 2 are at least one layer of flexible film and airtight, and are made of one selected from plastic films, rubber films, latex films, carbon fiber films, plastic metal composite films, plastic composite films and plastic fiber films.
Preferably, the top film 1 and the bottom film 2 are geomembranes.
Further, the sealing and pressing mode of the edges of the top film 1 and the bottom film 2 may be one of cold pressing, hot pressing, high-frequency pressing and ultrasonic pressing.
The utility model also provides a method for controlling and planning the algae pollution on the water surfaces of urban and rural rivers and lakes by using the algae in-situ anaerobic fermentation integrated device, as shown in figure 3, comprising the following steps,
collecting a soil sample of a near-shore river and lake, and measuring the nitrogen and phosphorus element contents of the soil sample;
determining an aggregation area of algal bloom in a water body according to the hydrologic form of rivers and lakes, the wind direction of surface wind power, the topography and topography of a near-shore region and the distribution of nitrogen and phosphorus in a collected and obtained near-shore soil sample;
formulating a water surface algae cleaning route by combining local climate change;
according to the algae cleaning route, the traction device 8 pulls the floating air sac type river and lake algae ecological in-situ treatment device to clean algae on the water surface.
Example 2
As shown in fig. 2, the floating anti-collision device comprises a top film 1, a bottom film 2, a feeding pipe 3, an air duct 4, a liquid discharge pipe 5, a slag discharge port 6, a floating anti-collision protection device 7, a traction device 8 and a diaphragm 9; the top film and the bottom film are flexible films and can float on the water surface of the water body; the lower surface of the top film 1 and the upper surface of the bottom film 2 are oppositely arranged in a sealing way, a closed flexible space air bag is enclosed, the top film 1 and the edge of the bottom film 2 are pressed into a whole, and the air bag is used for containing biogas residues, biogas slurry and biogas generated by algae fermentation; one end of the feed pipe 3 is arranged inside the air bag and extends below the liquid level of the biogas slurry inside the air bag, and the other end of the feed pipe is arranged outside the air bag; one end of the air duct 4 is arranged in the position, close to the vertex, of the inner center of the air bag and above the biogas slurry liquid level, and the other end of the air duct is arranged on the outer side of the air bag and connected with a biogas collecting device; one end of the liquid discharge pipe 5 is arranged in the air bag and extends below the liquid level of the biogas slurry, and the other end of the liquid discharge pipe is arranged outside the air bag; the slag discharge port 6 is provided with a closed flange; the traction device 7 is connected with the air bag. The positions of the feed pipe 3, the air duct 4 and the liquid discharge pipe 5, which are respectively in contact with the upper film or the lower film of the air bag, are in sealing contact, one end of the feed pipe is arranged outside the air bag, the other end of the feed pipe is arranged outside the air bag, one end of the air duct 4, which is arranged outside the air bag, is connected with an external gas storage device, and is used for guiding gas generated by algae fermentation inside the air bag to the external gas storage device through the air duct 4; and one end of the inner part of the air bag of the feed pipe 3 and the liquid discharge pipe 4 enters below the liquid level of the biogas slurry, and the inner part of the air bag is of a sealing structure. The other preferable scheme of the utility model is that the air bag is not provided with a slag discharge port, and a suction pump is arranged at the liquid discharge pipe to discharge biogas slag generated by fermentation through the suction pump of the liquid discharge pipe.
Further, the upper half section of the feeding pipe 3 is a rigid pipe, a spiral auger 31 is arranged for pushing the feeding, the lower half section is a flexible pipe, and the end part close to the pipeline is externally connected with a floating ball 32; the drain pipe 5 sets up in the external floater of the inside one end of gasbag, and the effect of floater can guarantee that inlet pipe 3 and drain pipe 5 seal with the gasbag external world all the time on the one hand, on the other hand can guarantee that algae normal position anaerobic fermentation integrated device floats on the surface of water.
Further, the top film 1 and the bottom film 2 are at least one layer of flexible film and airtight, and are made of one selected from plastic films, rubber films, latex films, carbon fiber films, plastic metal composite films, plastic composite films and plastic fiber films.
Preferably, the top film 1 and the bottom film 2 are geomembranes.
Further, the sealing and pressing mode of the edges of the top film 1 and the bottom film 2 may be one of cold pressing, hot pressing, high-frequency pressing and ultrasonic pressing.
The membrane 9 is arranged between the top membrane 1 and the bottom membrane 2, the upper surface of the membrane 9 is opposite to the lower surface of the top membrane 1, the lower surface of the membrane 9 is opposite to the upper surface of the bottom membrane 2, and biogas slurry and biogas residues of an air bag are filled in a space between the membrane 9 and the bottom membrane 2; the edge of the top film 1, the edge of the diaphragm 9 and the edge of the bottom film 2 are pressed together; the membrane 9 is a waterproof and breathable membrane. The waterproof and breathable membrane has the effects that biogas generated by algae fermentation can permeate, and biogas residues and biogas liquid generated by fermentation cannot permeate, so that in the algae in-situ anaerobic fermentation integrated device, the biogas generated by algae fermentation can permeate the membrane 9 and enter a cavity formed by the membrane 9 and the top membrane 1, and is led out of the air bag through the air duct 4 and collected by an external biogas collecting device; biogas residues and biogas slurry generated by the fermentation of algae cannot permeate the diaphragm 9, so that the biogas residues and biogas slurry are stored in a cavity formed by the diaphragm 9 and the bottom film 2 and are led out through the liquid discharge pipe 5 and the slag discharge port 6.
Further, the membrane pore diameter of the membrane 9 is 0.1-1.0 μm; the material is at least one selected from polytetrafluoroethylene, polypropylene, polyethylene, polyvinyl chloride and polyurethane.
Further, the colors of the top film 1, the separator 9 and the bottom film 2 may be transparent or opaque, respectively, and the colors of the top film 1, the separator 9 and the bottom film 2 may be the same or different.
Further, the top film 1 is colorless and transparent, the separator 9 is black, and the bottom film 2 is black. The purpose is that sunlight irradiates onto the black diaphragm 9 through the top film 1, so that sunlight heat is absorbed, the temperature of a closed cavity formed by the black diaphragm 9 and the black bottom film 2 is increased, the temperature is kept, and anaerobic fermentation of algae in the cavity is promoted.
The utility model also provides a method for controlling and planning the algae pollution on the water surfaces of urban and rural rivers and lakes by using the algae in-situ anaerobic fermentation integrated device, as shown in figure 3, comprising the following steps,
collecting a soil sample of a near-shore river and lake, and measuring the nitrogen and phosphorus element contents of the soil sample;
determining an aggregation area of algal bloom in a water body according to the hydrologic form of rivers and lakes, the wind direction of surface wind power, the topography and topography of a near-shore region and the distribution of nitrogen and phosphorus in a collected and obtained near-shore soil sample;
formulating a water surface algae cleaning route by combining local climate change;
according to the algae cleaning route, the traction device 8 pulls the floating air sac type river and lake algae ecological in-situ treatment device to clean algae on the water surface.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. An integrated device for in-situ anaerobic fermentation of algae, which floats on the water surface, is characterized by comprising a top film, a bottom film, a feed pipe, an air duct, a liquid discharge pipe, a slag discharge port, a floating anti-collision protection device and a traction device; the top film and the bottom film are flexible films; the lower surface of the top film and the upper surface of the bottom film are oppositely and hermetically arranged to enclose a closed flexible space air bag, the top film and the edge of the bottom film are pressed into a whole, and the air bag is used for containing biogas residues, biogas slurry and biogas generated by algae fermentation; one end of the feed pipe is arranged in the air bag and extends below the liquid level of the biogas slurry in the air bag, and the other end of the feed pipe is arranged outside the air bag; one end of the air duct is arranged in the position, close to the vertex, of the inner center of the air bag and above the biogas slurry liquid level, and the other end of the air duct is arranged on the outer side of the air bag and connected with the biogas collecting device; one end of the liquid discharge pipe is arranged in the air bag and extends below the liquid level of the biogas slurry, and the other end of the liquid discharge pipe is arranged outside the air bag; the slag discharge port is provided with a closed flange; the traction device is movably connected with the air bag.
2. The integrated device for in-situ anaerobic fermentation of algae according to claim 1, wherein the upper half section of the feed pipe is a rigid pipe and is provided with a spiral auger pushing feed, the lower half section is a flexible pipe, and the end part close to the pipeline is externally connected with a floating ball; the liquid discharge pipe is arranged at one end of the air bag and is externally connected with a floating ball.
3. The integrated device for in-situ anaerobic fermentation of algae according to claim 2, wherein the top film and the bottom film are at least one layer of flexible film and airtight, and are made of one selected from plastic film, rubber film, latex film, carbon fiber film, plastic-metal composite film, plastic composite film and plastic fiber film.
4. An integrated device for in-situ anaerobic fermentation of algae according to claim 3, wherein the top and bottom membranes are geomembranes.
5. The integrated device for in-situ anaerobic fermentation of algae according to claim 2, wherein the sealing and pressing mode of the edges of the top film and the bottom film can be one of cold pressing, hot pressing, high-frequency pressing and ultrasonic pressing.
6. The integrated device for in-situ anaerobic fermentation of algae according to any one of claims 1 to 5, further comprising a membrane, wherein the membrane is arranged between the top membrane and the bottom membrane, the upper surface of the membrane is arranged opposite to the lower surface of the top membrane, the lower surface of the membrane is arranged opposite to the upper surface of the bottom membrane, and biogas slurry and biogas residues of an air bag are filled in a space between the membrane and the bottom membrane; the edge of the top film, the edge of the diaphragm and the edge of the bottom film are pressed together into a whole; the diaphragm is a waterproof breathable film.
7. The integrated device for in-situ anaerobic fermentation of algae according to claim 6, wherein the membrane pore diameter of the membrane is 0.1-1.0 μm; the material is at least one selected from polytetrafluoroethylene, polypropylene, polyethylene, polyvinyl chloride and polyurethane.
8. The integrated device for in-situ anaerobic fermentation of algae according to claim 6, wherein the top film, the membrane and the bottom film can be transparent or opaque respectively, and the colors of the top film, the membrane and the bottom film can be the same or different.
9. The integrated device for in-situ anaerobic fermentation of algae according to claim 8, wherein the top film is colorless and transparent, the membrane is black, and the bottom film is black.
10. An in-situ anaerobic fermentation integrated device using the algae of any one of claims 1-5, 7-9
The method for planning the prevention and treatment of algae pollution on the water surfaces of urban, rural, river and lake is characterized by comprising the following steps,
collecting a soil sample of a near-shore river and lake, and measuring the nitrogen and phosphorus element contents of the soil sample;
determining an aggregation area of algal bloom in a water body according to the hydrologic form of rivers and lakes, the wind direction of surface wind power, the topography and topography of a near-shore region and the distribution of nitrogen and phosphorus in a collected and obtained near-shore soil sample;
formulating a water surface algae cleaning route by combining local climate change;
according to the algae cleaning route, the traction device pulls the algae in-situ anaerobic fermentation integrated device to clean the algae on the water surface.
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