CN111766181A - In-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system - Google Patents
In-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system Download PDFInfo
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- CN111766181A CN111766181A CN202010623507.8A CN202010623507A CN111766181A CN 111766181 A CN111766181 A CN 111766181A CN 202010623507 A CN202010623507 A CN 202010623507A CN 111766181 A CN111766181 A CN 111766181A
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Abstract
The invention relates to an in-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system, which is characterized by comprising the following components: the system comprises a circulating water system, a simulated water ecological experiment system, an aeration system, a monitoring system and a sampling system, wherein sediments are paved in the simulated water ecological experiment system; the circulating water system flows through the overlying water, enters the water inlet chamber from the water inlet and enters the simulated water ecological experimental system through the flow stabilizing hole; the aeration system provides dissolved oxygen for the overlying water through the porous blast aeration pipe; the monitoring system monitors the water quality in real time in the simulated culture process; the method can be used for researching the endogenous release of the nutrient salt in the water ecosystem under different environmental conditions, accurately quantifies the migration and transformation rule of the nutrient salt at the sediment-overlying water interface, and provides theoretical basis and technical reference for the restoration of the water ecosystem.
Description
Technical Field
The invention relates to the technical field of water ecological system engineering, in particular to an in-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system.
Background
With the rapid development of economy in China, the industrialization process is accelerated continuously, and the problem of water pollution is highlighted day by day, although the country has developed a series of laws and regulations on water pollution prevention and control, the control strength of exogenous pollution to the water environment is increased gradually, so that the exogenous pollution is intercepted effectively, under certain conditions, sediments as endogenous pollution can still continuously release pollutants to the overlying water, so that the overlying water maintains higher nutrition level.
Chinese patent publication No. CN105585129A discloses a device and a method for simulating the return and trend of nitrogen in an in-situ river channel ecosystem, wherein the device can monitor the temperature, pH and dissolved oxygen in the simulation process in real time, simultaneously measure the sediment nitrogen concentration, the water nitrogen concentration and the gas production nitrogen content, and research the nitrogen output and conversion among various denitrification ways of the river channel ecosystem; the Chinese patent publication No. CN110082484A discloses a water-sediment degradation experimental device, which consists of an air supply device, a sealing device and an exhaust sampling device, ensures anaerobic experimental conditions and is used for experiments such as water-sediment degradation experiments and laboratory simulation internal pollutant release; CN110578318A provides a circulating water tank capable of simulating riverway sediment environments, which can simulate sediment environments such as rivers, detect sediment states at different time points through a plurality of culture boxes, and realize adjustment of water depth and flow rate through a circulating water system; chinese patent publication No. CN108872528A discloses a method for measuring the circulation rate of sediment nitrogen based on a continuous process, which can calculate the denitrification, nitrification and ammoniation rates of sediment by adding the sediment into a serum bottle, replacing the air at the top of the bottle, adding urea and culturing at constant temperature; chinese patent publication No. CN110528454A discloses a simulation experiment device and method for pollutant adsorption and release of sediments at river course junctions, the device comprises a water circulation device, a flow regulating device, a sediment laying device and a sampling device, the junction angle and the junction flow ratio of a main stream and a branch stream can be changed through hinges, and the device is suitable for river courses with different junction ratios under natural conditions; chinese patent publication No. CN110967279A discloses 'an experimental device, an experimental method and applications thereof for simulating migration and transformation behaviors of pollutants in near seawater-sediments', the device comprises an exogenous pollutant storage chamber, a water source conveying system and a mud-water exchange system so as to realize the simulation of pollutant input, staying and sample sampling; chinese patent publication No. CN109490084A discloses an in-situ test device and method for simulating endogenous pollutant release amount in marine sediments under the action of waves, which can be used for in-situ experiments on submarine sediments, maintain the original structure of the sediments in the sampling process, simulate the load conditions under different natural conditions and reveal the endogenous release rule of the submarine sediments; chinese patent publication No. CN107449638A discloses a device for researching flux of nutritive salt at sediment-water interface under the influence of oxygen, wherein an experimental container is composed of an upper part and a lower part which can be separated, the upper part is provided with an aerobic/anaerobic control device and an upper water-covering collector, and the lower part is provided with a gap water collecting hole, so that the comparative research on flux of nutritive salt at sediment-water interface can be realized under the conditions of sufficient and lack of oxygen; chinese patent publication No. CN104360014A discloses a device for simulating the influence of water level change on the release risk of nitrogen, phosphorus and heavy metals of sediments, wherein a plurality of steps are arranged in the device, the heights of the steps are arranged in a gradient manner, and a sediment containing groove is arranged, so that the height gradient and the water level change of the sediments can be effectively simulated; the Chinese patent publication No. CN104075872A discloses a circulating straight water tank device for simulating resuspension of sediments under the action of reciprocating flow, which can simulate the starting and resuspension processes of bottom mud under the action of tidal reciprocating water flow of a tidal river reach and can collect water samples at different depths under a certain hydraulic condition.
The nutrient salts in the sediments can be released to the overlying water body through the processes of desorption, microbial decomposition, oxidation reduction, molecular diffusion, resuspension and the like, and meanwhile, the nutrient salts in the overlying water can be transferred to the sediments through the processes of adsorption, precipitation/sedimentation, molecular diffusion and the like. When the overlying water body is anoxic, Fe3+Is reduced to Fe2+With Fe3+The combined phosphorus is released into the overlying water, and meanwhile, the phosphorus is released into the overlying water by the dissolution of the calcium-combined phosphorus and the decomposition of organic matters, so that the phosphorus content in the water body is increased. Compared with phosphorus, the migration and transformation of nitrogen are more complex, and the processes of decomposition, nitrification, denitrification, ammonia oxidation and the like of nitrogen-containing organic matters have important influence on the distribution and existence form of nitrogen between sediment and overlying water. Nitrification and denitrification at the sediment-overburden water interface are carried out vertically in layers and only occur within a thin layer of sediment several centimeters at the surface. Under the aerobic condition, the organic nitrogen in the sediment is mineralized,formation of NH4 +、NO3 -Inorganic ions are diffused into the overlying water body, so that the nitrogen content in the water body is increased; NO in overlying water3 -Enters the anaerobic layer of the sediment and is reduced into N by denitrifying bacteria2O and N2And eventually spills into the air. The migration and transformation of nutritive salt among overlying water bodies, sediments and sediment interstitial water under different environmental conditions are researched, a substance exchange mechanism between the sediments and the overlying water is analyzed, theoretical support is provided for water ecosystem restoration, and technical guidance can be provided for solving the problem of water environment and realizing sustainable development of environment, economy and society on the basis.
Disclosure of Invention
The invention aims to provide an in-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system aiming at the problems in the prior art, which can accurately quantify the migration and conversion rule of nutritive salt at the sediment-overlying water interface of a water ecological system, simulate a water ecological experimental system to lay sediment and arrange a sediment sampling port and a sediment gap water sampling port, and fill overlying water body and arrange an overlying water sampling port at the upper part; the circulating water system pushes the overlying water to flow through the water pump, enters the water inlet chamber through the water inlet and enters the simulated riverway through the flow stabilizing holes formed in the flow stabilizing plate; the aeration system provides dissolved oxygen for the overlying water through an air pipe and a porous blast aeration pipe; the monitoring system carries out real-time water quality monitoring on the simulation culture process.
The technical scheme adopted for realizing the aim of the invention is as follows: an in situ water ecological nutritive salt deposit-overlying water interface migration and conversion simulation system, comprising: circulating water system, simulation water ecology experimental system, aeration systems, monitoring system and sampling system, circulating water system include: the water pump 11, the water pipe 12, the flowmeter 13, the valve 18 and the glass water tank 19, set up the water inlet 14 and outlet 17 separately in the both sides end board inferior part of the said glass water tank 19, the said water pump 11 connects water inlet 14 and outlet 17 separately through the water pipe 12, form the closed circuit, set up the flowmeter 13 on the water pipe between said water pump 11 and water inlet 14, set up the valve 18 on the water pipe between said water pump 11 and outlet 17; the simulated water ecology experiment system comprises: the water treatment device comprises a flow stabilizing hole 21, a first flow stabilizing plate 22, a second flow stabilizing plate 23, an overlying water body 7 and a sediment 8, wherein the glass water tank 19 is sequentially divided into a water inlet chamber 15, a water ecological laboratory 24 and a water outlet chamber 16 by the first flow stabilizing plate 22 and the second flow stabilizing plate 23, the sediment 8 is arranged at the bottom of the water ecological laboratory 24, the overlying water body 7 is arranged at the upper part of the sediment 8, a sediment-overlying water interface is formed between the sediment 8 and the overlying water body 7, and the flow stabilizing hole 22 is respectively arranged on the first flow stabilizing plate 21 and the second flow stabilizing plate 23; the sampling system comprises: the device comprises a water sample sampling port 31, a sediment sampling port 32 and a sediment gap water sampling port 33, wherein the water sample sampling port 31 is arranged in an overlying water body 7 above a sediment-overlying water interface, and the sediment sampling port 32 and the sediment gap water sampling port 33 are arranged in a sediment 8 below the sediment-overlying water interface; the monitoring system includes: the system comprises a flow meter probe 41, a flow meter host 42, an ORP probe 43, a DO probe 44, a pH probe 45, a computer host 46 and a display 47, wherein the flow meter probe 41, the ORP probe 43, the DO probe 44 and the pH probe 45 are arranged in an overlying water body 7 above a sediment-overlying water interface, the ORP probe 43, the DO probe 44 and the pH probe 45 are electrically connected with the computer host 46, the computer host 46 is electrically connected with the display 47, and the flow meter probe 41 is electrically connected with the flow meter host 42; the aeration device comprises: the aeration device comprises a porous blast aeration pipe 51, an air pipe 52, a gas flowmeter 53 and an air source 54, wherein the porous blast aeration pipe 51 is connected with the air source 54 through the air pipe 52, the gas flowmeter 53 is arranged on the air pipe 52 between the porous blast aeration pipe 51 and the air source 54, the porous blast aeration pipe 51 is arranged in an overlying water body 7 above a sediment-overlying water interface, and the aeration amount of overlying water in the simulated water ecosystem is controlled by adjusting the gas flowmeter 53.
It still includes water charging system, water charging system include moisturizing mouth 61, moisturizing valve door 62, moisturizing flowmeter 63, moisturizing pump 64 and storage water tank 65, moisturizing mouth 61 set up on 14 upper portions of water inlet storage water tank 65 and moisturizing mouth 61 be connected the water pipe on set up moisturizing pump 64 and moisturizing mouth 61 the water pipe between moisturizing pump 64 and moisturizing mouth 61 on set up moisturizing flowmeter 63 moisturizing valve door 62 with moisturizing mouth 61 on the water pipe between, through adjusting moisturizing valve door 62 opening degree control moisturizing volume.
The glass water tank 19 is an organic glass water tank.
The flow stabilizing holes 22 are arranged in a matrix, and the hole diameter is gradually increased from bottom to top, so that the overlying water body is in different flow state distributions.
The simulated water ecological experimental system further comprises a fixed cross frame 25, two ends of the fixed cross frame 25 are fixedly connected with the glass water tank 19, the fixed cross frame 25 is fixedly connected with a current meter probe 41, an ORP probe 43, a DO probe 44, a pH probe 45 and a porous blast aeration pipe 51 respectively, the vertical height of the fixed cross frame 25 is adjustable, and the positions of a monitoring device and the porous blast aeration pipe 51 fixed on the fixed cross frame are adjusted.
The water sample sampling port 31 establish one or more, sediment gap water sampling port 32 establish one or more, need external special gap water sampler simultaneously.
The gas source 54 is an air compressor, an oxygen tank or a nitrogen tank.
The water storage tank 64 is filled with tap water, reclaimed water or effluent water treated by a sewage plant.
The water storage tank 64 is filled with tap water, reclaimed water or effluent water treated by a sewage plant to form mixed water.
The beneficial effects of the in-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system are as follows:
1. the method can be used for researching the migration and transformation of the nutritive salt in the water ecosystem among phases under different environmental conditions, accurately quantifies the migration and transformation rule of the nutritive salt at the sediment-overlying water interface of the water ecosystem, and provides theoretical basis and technical reference for the research of ecological restoration of the water ecosystem; the structure is simple, the operation is convenient, the function is strong, the performance is excellent, and the adaptability is strong;
2. the sampling system is arranged through sampling port sites to realize synchronous acquisition of the overlying water, the sediment gap water and the sediment sample;
3. different distribution of the overlying water flow field can be realized by adjusting the flow of the water pump and the arrangement of the flow stabilizing holes;
4. different redox conditions of the overlying water can be realized by controlling the conditions.
Drawings
FIG. 1 is a schematic diagram of an in situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system according to the present invention;
FIG. 2 is a schematic view of the arrangement of sampling points in FIG. 1;
FIG. 3 is a view of one arrangement of flow stabilizer holes in the flow stabilizer plate of FIG. 1;
FIG. 4 shows the nitrogen content change of the overlay water in the embodiment;
FIG. 5 shows the change of the nitrogen occurrence content of the deposit in the working examples;
in the figure: 7. the water treatment system comprises an upper water body, 8 sediment, 11 a water pump, 12 a water pipe, 13 a flow meter, 14a water inlet, 15 a water inlet chamber, 16 a water outlet chamber, 17 a water outlet, 18a valve, 19 a glass water tank, 21 a steady flow hole, 22 a first steady flow plate, 23 a second steady flow plate, 24 a water ecology laboratory, 25 a fixed cross frame 31, a water sample sampling port, 32 a sediment sampling port, 33 a sediment interstitial water sampling port, 41 a flow meter probe, 42 a flow meter host, 43 an ORP probe, 44 a DO probe, 45.pH probe, 46 a computer host, 47 a display, 51 a porous blast aeration pipe, 52 an air pipe, 53 a gas flow meter, 54 an air source, 61 a water replenishing port, 62 a water replenishing valve, 63 a water replenishing flow meter, 64 a water replenishing pump and 65 a water storage tank.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments, which are described herein for purposes of illustration only and are not intended to be limiting.
Example (b):
the sediment and the overlying water sample used in the indoor simulation experiment are the sediment and the water sample collected by the in-situ river channel, the collected sample is stored in a low-temperature and light-proof manner and is sent back to the laboratory as soon as possible, and the simulated water ecosystem device is filled to complete the construction of the simulated environment in the whole laboratory.
As shown in figure 1, the in-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system is characterized by comprising: circulating water system, simulation water ecology experimental system, aeration systems, monitoring system and sampling system, circulating water system include: the water pump 11, the water pipe 12, the flowmeter 13, the valve 18 and the glass water tank 19, set up the water inlet 14 and outlet 17 separately in the both sides end board inferior part of the said glass water tank 19, the said water pump 11 connects water inlet 14 and outlet 17 separately through the water pipe 12, form the closed circuit, set up the flowmeter 13 on the water pipe between said water pump 11 and water inlet 14, set up the valve 18 on the water pipe between said water pump 11 and outlet 17; the simulated water ecology experiment system comprises: the water treatment device comprises a flow stabilizing hole 21, a first flow stabilizing plate 22, a second flow stabilizing plate 23, an overlying water body 7 and a sediment 8, wherein the glass water tank 19 is sequentially divided into a water inlet chamber 15, a water ecological laboratory 24 and a water outlet chamber 16 by the first flow stabilizing plate 22 and the second flow stabilizing plate 23, the sediment 8 is arranged at the bottom of the ecological laboratory 24, the overlying water body 7 is arranged at the upper part of the sediment 8, a sediment-overlying water interface is formed between the sediment 8 and the overlying water body 7, and the flow stabilizing hole 22 is respectively arranged on the first flow stabilizing plate 21 and the second flow stabilizing plate 23; the sampling system comprises: the device comprises a water sample sampling port 31, a sediment sampling port 32 and a sediment gap water sampling port 33, wherein the water sample sampling port 31 is arranged in an overlying water body 7 above a sediment-overlying water interface, and the sediment sampling port 32 and the sediment gap water sampling port 33 are arranged in a sediment 8 below the sediment-overlying water interface; the monitoring system includes: the system comprises a flow meter probe 41, a flow meter host 42, an ORP probe 43, a DO probe 44, a pH probe 45, a computer host 46 and a display 47, wherein the flow meter probe 41, the ORP probe 43, the DO probe 44 and the pH probe 45 are arranged in an overlying water body 7 above a sediment-overlying water interface, the ORP probe 43, the DO probe 44 and the pH probe 45 are electrically connected with the computer host 46, the computer host 46 is electrically connected with the display 47, and the flow meter probe 41 is electrically connected with the flow meter host 42; the aeration device comprises: the aeration device comprises a porous blast aeration pipe 51, an air pipe 52, a gas flowmeter 53 and an air source 54, wherein the porous blast aeration pipe 51 is connected with the air source 54 through the air pipe 52, the gas flowmeter 53 is arranged on the air pipe 52 between the porous blast aeration pipe 51 and the air source 54, the porous blast aeration pipe 51 is arranged in an overlying water body 7 above a sediment-overlying water interface, and the aeration amount of overlying water in the simulated water ecosystem is controlled by adjusting the gas flowmeter 53.
The aeration device comprises a porous blast aeration pipe 51, an air pipe 52, a gas flow meter 53 and an air source 54, wherein the aeration amount of the overlying water in the simulated water ecosystem is controlled by adjusting the gas flow meter 53, the air source 54 can be replaced according to actual requirements, if the experiment is aerobic condition, the dissolved oxygen content in the overlying water needs to be increased, the air source 54 is an air compressor or an oxygen tank, and if the experiment is anoxic/anaerobic condition, the air source 54 is a nitrogen tank.
The water supplementing system comprises a water supplementing opening 61, a water supplementing valve 62, a water supplementing flowmeter 63, a water supplementing pump 64 and a water storage tank 65, the water supplementing quantity is controlled by adjusting the opening degree of the water supplementing valve 62, the water level of the upper covering water in the simulated water ecological system is kept constant, and the water storage tank 65 can be tap water, regenerated water, treated water of a sewage plant and the like.
As shown in fig. 2, the sampling system includes one or more water sampling ports 31 above the sediment-overburden water interface, a sediment sampling port 32 below the interface, and one or more sediment interstitial water sampling ports 33 that require external dedicated interstitial water samplers.
The simulated water ecological experimental system comprises a flow stabilizing hole 21, a first flow stabilizing plate 22, a second flow stabilizing plate 23, a fixed cross frame 25, an overlying water body 7 for filling and sediment 8 laid at the bottom, the part is a transparent cuboid made of organic glass, the length is 1.2 meters, the width is 0.45 meters, the height is 0.7 meters, wherein the distance between the water inlet and the water outlet is 0.1m, the first flow stabilizing plate 22 and the second flow stabilizing plate 23 not only can make the water velocity in the overlying water body be uniformly distributed to prevent the jet phenomenon, meanwhile, the sediment can be prevented from flowing away along with the effluent, the overlying water body can be in different flow state distributions by controlling the aperture size and the hole distribution position of the flow stabilizing holes 21, the flow stabilizing holes are arranged as shown in figure 3, and the vertical height of the fixing cross frame 25 can be adjusted, so that the purpose of reinforcing an experimental device can be achieved, and the positions of a monitoring device and an aeration pipe fixed on the experimental device can be adjusted.
The specific experimental steps are as follows:
1. removing impurities such as leaves and the like from in-situ river sediment, filling the sediment into an experimental device, wherein the sediment filling height is 10cm, and slowly injecting overlying water along the inner wall of the device by adopting a siphon method, wherein the overlying water height is 50 cm; closing the valve 18 and the water replenishment valve 62 during filling;
2. water sample sampling ports 31 are formed at positions 5cm, 25cm and 45cm deep of the overlying water 7, a sediment sampling port 32 is formed at a position 5cm below a sediment-overlying water interface, sediment gap water sampling ports 33 are formed at positions 0.5cm, 1cm, 1.5cm, 2cm and 2.5cm below the sediment-overlying water interface, the sampling ports are externally connected with a Rhizon gap water sampler, and the arrangement positions of the sampling ports are shown in FIG. 2;
3. starting the water pump 11, adjusting the valve 18, and maintaining the circulation period of the overlying water at 24h and the circulation flow at 0.2 l/min;
4. the air source 54 selects an air compressor to aerate the overlying water and maintain the overlying water in an aerobic state, and the dissolved oxygen in the water body is 6.0-7.0 mg/l;
5. selecting the regenerated water as a water replenishing source, storing the regenerated water in a water storage tank 65, starting a water replenishing pump 64, adjusting a water replenishing valve 62, maintaining the water level of the upper water in the simulated water ecological system to be constant, and calculating the water replenishing amount to be 3ml/min according to the evaporation amount of the area.
6. The experiment was maintained for 20 days and samples of overburden water and sediment gap water were taken on days 0, 1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 of the start of the experiment and samples of sediment were taken at the beginning and end of the experiment while monitoring flow rate, DO, ORP and pH in overburden water daily. The results show that ammonia nitrogen content in the overlying water is greatly reduced, total phosphorus and active phosphorus are also reduced to a certain extent, the risk of releasing the sediment to the overlying water exists, the phosphorus has a tendency to migrate to the sediment and is stored in the sediment in the form of apatite phosphorus, and as shown in figure 5, the migration of pollutants between interfaces is mainly turbulent diffusion.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (9)
1. The in-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system is characterized by comprising the following components: circulating water system, simulation water ecology experimental system, aeration systems, monitoring system and sampling system, circulating water system include: the water pump comprises a water pump (11), a water pipe (12), a flowmeter (13), a valve (18) and a glass water tank (19), wherein a water inlet (14) and a water outlet (17) are respectively arranged at the lower parts of end plates at two sides of the glass water tank (19), the water pump (11) is respectively connected with the water inlet (14) and the water outlet (17) through the water pipe (12) to form a closed loop, the flowmeter (13) is arranged on the water pipe between the water pump (11) and the water inlet (14), and the valve (18) is arranged on the water pipe between the water pump (11) and the water outlet (17); the simulated water ecology experiment system comprises: the water-saving device comprises a flow stabilizing hole (21), a first flow stabilizing plate (22), a second flow stabilizing plate (23), an overlying water body (7) and a sediment (8), wherein the glass water tank (19) is sequentially divided into a water inlet chamber (15), a water ecological laboratory (24) and a water outlet chamber (16) by the first flow stabilizing plate (22) and the second flow stabilizing plate (23), the sediment (8) is arranged at the bottom of the water ecological laboratory (24), the overlying water body (7) is arranged at the upper part of the sediment (8), a sediment-overlying water interface is formed between the sediment (8) and the overlying water body (7), and the flow stabilizing hole (21) is respectively arranged on the first flow stabilizing plate (22) and the second flow stabilizing plate (23); the sampling system comprises: a water sample sampling port (31), a sediment sampling port (32) and a sediment gap water sampling port (33), wherein the water sample sampling port (31) is arranged in the overlying water body (7) above the sediment-overlying water interface, and the sediment sampling port (32) and the sediment gap water sampling port (33) are arranged in the sediment (8) below the sediment-overlying water interface; the monitoring system includes: the system comprises a current meter probe (41), a current meter host (42), an ORP probe (43), a DO probe (44), a pH probe (45), a computer host (46) and a display (47), wherein the current meter probe (41), the ORP probe (43), the DO probe (44) and the pH probe (45) are arranged in an overlying water body (7) above a sediment-overlying water interface, the ORP probe (43), the DO probe (44) and the pH probe (45) are electrically connected with the computer host (46), the computer host (46) is electrically connected with the display (47), and the current meter probe (41) is electrically connected with the current meter host (42); the aeration device comprises: the aeration device comprises a porous blast aeration pipe (51), an air pipe (52), a gas flowmeter (53) and an air source (54), wherein the porous blast aeration pipe (51) is connected with the air source (54) through the air pipe (52), the gas flowmeter (53) is arranged on the air pipe (52) between the porous blast aeration pipe (51) and the air source (54), the porous blast aeration pipe (51) is arranged in an overlying water body (7) above a sediment-overlying water interface, and the aeration amount of the overlying water in the simulated water ecosystem is controlled by adjusting the gas flowmeter (53).
2. The in-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system as claimed in claim 1, characterized by further comprising a water replenishing system, wherein the water replenishing system comprises a water replenishing port (61), a water replenishing valve (62), a water replenishing flow meter (63), a water replenishing pump (64) and a water storage tank (65), the water replenishing port (61) is arranged at the upper part of the water inlet (14), the water replenishing pump (64) is arranged on a water pipe connecting the water storage tank (65) and the water replenishing port (61), the water replenishing flow meter (63) is arranged on a water pipe between the water replenishing pump (64) and the water replenishing port (61), the water replenishing valve (62) is arranged on a water pipe between the water replenishing flow meter (63) and the water replenishing port (61), and the water replenishing amount is controlled by adjusting the opening degree of the water replenishing valve (62).
3. The in-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system as claimed in claim 1, wherein the glass water tank (19) is an organic glass water tank.
4. The in-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system as claimed in claim 1 or claim 2, wherein the flow stabilizing holes (21) are arranged in a matrix, and the hole diameter is gradually increased from bottom to top, so that the overlying water body is in different flow state distribution.
5. The in-situ water ecological nutrient salt sediment-overlying water interface migration and conversion simulation system as claimed in claim 1 or claim 2, wherein the simulated water ecological experimental system further comprises a fixed cross frame (25), two ends of the fixed cross frame (25) are fixedly connected with the glass water tank (19), the fixed cross frame (25) is fixedly connected with a flow rate meter probe (41), an ORP probe (43), a DO probe (44), a pH probe (45) and a porous blast aeration pipe (51), respectively, the vertical height of the fixed cross frame (25) is adjustable, and the positions of a monitoring device and the porous blast aeration pipe (51) fixed on the fixed cross frame are adjusted.
6. The in-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system as claimed in claim 1, wherein one or more water sample sampling ports (31) are provided, one or more sediment interstitial water sampling ports (32) are provided, and a special interstitial water sampler is required to be externally connected.
7. The in-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system as claimed in claim 1, wherein the gas source (54) is an air compressor, an oxygen tank or a nitrogen tank.
8. The in-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system as claimed in claim 2, wherein the water storage tank (64) is filled with tap water, reclaimed water or effluent water treated by a sewage plant.
9. The in-situ water ecological nutritive salt sediment-overlying water interface migration and conversion simulation system as claimed in claim 2, wherein the water storage tank (64) is filled with mixed water formed by tap water, reclaimed water or effluent water treated by a sewage plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010623507.8A CN111766181B (en) | 2020-06-29 | 2020-06-29 | In-situ aquatic ecological nutrient salt sediment-overlying water interface migration and transformation simulation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010623507.8A CN111766181B (en) | 2020-06-29 | 2020-06-29 | In-situ aquatic ecological nutrient salt sediment-overlying water interface migration and transformation simulation system |
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| Publication Number | Publication Date |
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| CN111766181A true CN111766181A (en) | 2020-10-13 |
| CN111766181B CN111766181B (en) | 2023-05-12 |
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| CN113406027A (en) * | 2021-06-16 | 2021-09-17 | 南京工业大学 | Quantitative calculation method for phosphorus migration and conversion in pipeline sediment-water system |
| CN113588209A (en) * | 2021-07-30 | 2021-11-02 | 交通运输部天津水运工程科学研究所 | Experimental device and method for phosphorus flux water tank in river |
| CN114380401A (en) * | 2022-01-05 | 2022-04-22 | 安徽省城建设计研究总院股份有限公司 | Experimental device for researching intermittent aeration and improving water quality of water body and using method thereof |
| CN114814131A (en) * | 2022-03-14 | 2022-07-29 | 中国环境科学研究院 | Intelligent simulation device and experimental method for bottom sediment pollution process and control |
| CN114878413A (en) * | 2022-04-24 | 2022-08-09 | 北京师范大学 | Sediment-water interface substance migration and conversion simulation device and use method |
| CN115684471A (en) * | 2022-09-09 | 2023-02-03 | 华南理工大学 | Multi-level analysis method based on black and odorous sediment nitrogen and sulfur release device |
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| CN113406027A (en) * | 2021-06-16 | 2021-09-17 | 南京工业大学 | Quantitative calculation method for phosphorus migration and conversion in pipeline sediment-water system |
| CN113406027B (en) * | 2021-06-16 | 2022-06-14 | 南京工业大学 | Quantitative calculation method for phosphorus migration and conversion in pipeline sediment-water system |
| CN113588209A (en) * | 2021-07-30 | 2021-11-02 | 交通运输部天津水运工程科学研究所 | Experimental device and method for phosphorus flux water tank in river |
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