CN112320962A - Method and system for improving total nitrogen removal rate of carbon-nitrogen imbalance tail water wetland for environmental management - Google Patents
Method and system for improving total nitrogen removal rate of carbon-nitrogen imbalance tail water wetland for environmental management Download PDFInfo
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Abstract
The invention discloses a method and a system for improving the total nitrogen removal rate of a tail water wetland with unbalanced carbon and nitrogen for environmental management, wherein the method for improving the total nitrogen removal rate of the tail water wetland with unbalanced carbon and nitrogen for environmental management comprises the following steps of S1, enabling tail water to be treated to flow through a primary filter tank, arranging a water return pipe and a first water quality sensor at the water outlet end of the filter tank, and connecting the first water quality sensor with a central control system in a communication way; the water at the water outlet end is discharged to the stabilization tank, and meanwhile, the water can flow back to the inlet of the primary filter tank through the water return pipe; step S2, filtering the water flow, standing the water flow in a stabilization tank, and making the water flow stable and the oxygen content, the carbon dioxide content and the water temperature stable basically; step S3, the three-dimensional water pool adopts a wetland formed by a deeper water pool; and step S4, the surface flow wetland is provided with a temperature sensing device for detecting the water temperature of the surface flow wetland.
Description
Technical Field
The invention relates to the field of tail water biological treatment, in particular to a method for improving the total nitrogen removal rate of a carbon-nitrogen imbalance tail water wetland for environmental management.
Background
As the 21 st century, the environment has become an object of increasing concern to countries and people, and people want a good environment. On the other hand, after industrial, agricultural and other domestic water is simply treated, namely tail water, sometimes reaches the national discharge standard, but the nutrition degree of the water is still high, so that the direct discharge into lakes or rivers can cause the nutrition of the lake water, lead to red tide and the vigorous growth of water hyacinth, and further influence the lakeside ecology.
On the other hand, Constructed Wetlands (Constructed Wetlands) are Constructed and supervised by human beings, and are a treatment system similar to the Wetlands, which utilize the triple synergistic effects of physics, chemistry and biology in a natural ecosystem to purify sewage. The artificial wetland belongs to a method for ecologically treating sewage, can be used as an effective alternative scheme of the traditional sewage treatment technology, has very important practical significance for saving funds, protecting water environment and effectively recovering ecology, and is also more and more paid attention and paid attention by countries in the world. The artificial wetland can be built into a free surface flow wetland, an undercurrent wetland and a vertical flow wetland according to the form of water flow. The subsurface flow wetland can fully utilize the functions of the surface of the filler and the biological membrane on the plant root system to treat sewage, has good treatment effect and good sanitary condition, and is generally widely adopted. From the operation effect of the existing artificial wetland, the treatment of sewage with low carbon-nitrogen ratio (abbreviated as C/N) has some defects: 1. the insufficient carbon source causes poor denitrification effect of the microorganisms; 2. the seasonal adaptability is poor, and the treatment effect is poor under the low-temperature condition; 3. the adsorption capacity of the filler to phosphorus is low, and the constructed wetland is easy to reach adsorption saturation and block a filler area after long-term operation, so that the treatment efficiency is reduced.
The patent CN106830343A discloses a method for improving the total nitrogen removal rate of a tail water wetland with carbon and nitrogen imbalance by using aquatic plants, and the invention relates to a method for improving the total nitrogen removal rate of a tail water wetland with carbon and nitrogen imbalance by using aquatic plants, wherein a composite treatment system is constructed, and comprises four subsystems, namely a stabilization pond, a surface flow wetland, an ecological water delivery channel and a horizontal subsurface flow wetland, and the subsystems are sequentially connected in series through processes. The advantages are that: 1) competition among different species in the aquatic plant community is reduced, the stability of the aquatic plant community is improved, and secondary pollution caused by concentrated decomposition of aquatic plant residues is avoided; 2) the talent cost is reduced, and the decomposed organic matters can provide a carbon source for wetland denitrification, so that the nitrogen removal rate is improved; 3) anaerobic and aerobic environments in different subsystems and different areas in the subsystems can alternately appear, the nitrification and denitrification effects are balanced, and the total nitrogen removal rate is improved; 4) reducing the common lack of purification capacity in winter in wetland purification engineering and relieving the lack of carbon source in summer in tail water wetland 5) realizes the purpose of providing high-efficiency, continuous and stable carbon source.
Patent CN102923861A discloses an artificial wetland for treating sewage with low carbon-nitrogen ratio by using minerals, which comprises a water inlet pipe, a water inlet area, a water outlet area and a water outlet pipe, wherein the water inlet pipe is connected with the water inlet area; the water outlet pipe is connected with the water outlet area; the soil-water separation device also comprises a water distribution area, a soil layer and a filler area, wherein the water inlet area, the water distribution area, the filler area and the water outlet area are sequentially connected; the water inlet area is filled with limestone; the interior of the filling area is filled with pyrite and limestone; the upper part of the filling area is a soil layer. The invention has the following advantages: 1. according to the constructed wetland for treating the sewage with the low carbon-nitrogen ratio by using the minerals, pyrite and limestone are used as the biological filter packing in the packing area, wherein pyrite (FeS2) is a sulfide mineral which is abundant in natural resources, can provide a sulfur source for denitrifying thiobacillus thioninhydrin, and denitrifies nitrogen by sulfur autotrophic denitrification, so that the denitrogenation does not depend on organic matters, the pyrite sulfur autotrophic denitrification product and pyrite have a good phosphorus removal effect, and the phosphorus removal effect can be maintained for a long time, so that the defect that the conventional packing is easy to reach phosphorus adsorption saturation is avoided; the reasonable matching of the pyrite and the limestone is more suitable for the propagation and growth of the thiobacillus denitrificans, the aim of purifying the water body is realized under the triple effects of plants, organisms and fillers, and COD in the water can be removed on the basis of synchronous nitrogen and phosphorus removal; 2. the invention adopts the mineral constructed wetland to treat the low C/N sewage, has the advantages of high treatment efficiency, stable operation, low investment and operation cost, convenient management, beautiful appearance, practicality and the like, utilizes the pyrite as the filler to carry out denitrification and dephosphorization, realizes the resource utilization of the minerals, has better development prospect and is suitable for popularization and use; 3. limestone with the thickness of 0.5m and the particle size of 5-20mm is paved in the water inlet area, so that macromolecular suspended matters can be intercepted, and the blockage of a filling area after the wetland is operated for a long time is avoided; 4. the upper part of the filling area is a soil layer, and aquatic plants are planted in the soil layer, so that on one hand, the aquatic plants can absorb nitrogen and phosphorus elements and purify a part of water quality, and on the other hand, the environment can be beautified; 5. the number of the water outlet pipes is 2-5, the height of the water level can be adjusted, and the submerging depth of the filler is changed, so that the ranges of an aerobic zone and an anoxic zone are adjusted, and the denitrification efficiency is improved; 6. the inside of the filling area also comprises a back flushing pipe which can carry out back flushing when the wetland is blocked in the later operation stage so as to improve the blockage problem of the wetland; 7. the volume ratio of the pyrite and the limestone filled in the filling area is 1-5: 1, the particle size of the pyrite and the limestone is 5-20mm, the setting of the parameter can efficiently realize synchronous nitrogen and phosphorus removal, is beneficial to the growth of reeds, is not easy to cause the blockage of the filling area, but only depends on natural resources, and can not carry out manual active intervention.
The patent CN103979736A discloses an artificial wetland device for denitrification of low-pollution water and a treatment method thereof, wherein the artificial wetland device for denitrification of low-pollution water comprises a constant flow pump, a water inlet area, a main reaction area and a water outlet area; pumping low-pollution water into a water inlet area through a constant flow pump; the water inlet area is provided with a water inlet hole and a water inlet valve; the water outlet area is provided with a water outlet hole and a water outlet valve; a filler area which is vertically layered upwards is arranged in the main reaction area; evergreen aquatic plants are planted above the filling area; a denitrification microbial bacteria liquid and a nutrient solution are arranged in the main reaction zone; the invention fully strengthens the functions of plants, matrixes and microorganisms in the aspect of denitrification treatment of the artificial wetland, prepares denitrification microorganism bacterium liquid by screening and stabilizing denitrification dominant bacteria in the wetland, and uses the denitrification microorganism liquid in the artificial wetland device to be matched with the preferred evergreen aquatic plants in winter, thereby achieving the purposes of strengthening the denitrification efficiency of the artificial wetland for treating low-pollution water and keeping the stability of the artificial wetland in autumn and winter. The patent has the following advantages: (1) the plants are selected from the combination of emergent aquatic plants and submerged plants, the diversity and the hierarchy of the plants are increased, the types which are evergreen in winter and stable in denitrification effect are selected, and the plant death in autumn and winter is avoided, so that the denitrification effect in cold seasons is enhanced. (2) The constructed wetland system can timely monitor various physical, chemical and biological factors of the constructed wetland operation, including temperature, illumination, pH, oxidation-reduction potential ORP, dissolved oxygen in water and filler, nitrogen and phosphorus concentration, microbial biomass and the like, can monitor and control various environmental factors in the constructed wetland in real time, and can optimize various control factors to ensure efficient operation. In the aspect of denitrification microorganisms, microorganisms participating in nitrogen circulation in the natural and stable artificial wetland are screened and domesticated, the obtained high-efficiency denitrification microorganism bacteria liquid is added into the artificial wetland device and cultured by the configured special nutrient solution, and therefore the quantity and the activity of the denitrification microorganisms in the device are improved. (3) The constructed wetland device adopts a symbiotic system of emergent aquatic plants, submerged plants and high-efficiency denitrification microorganisms, is assisted by the optimization and hierarchical configuration of fillers, adopts wetland fillers with good denitrification effect to carry out hierarchical configuration, and strengthens the importance of a substrate in denitrification. The effects of plants, fillers and microorganisms on the aspect of denitrification of the artificial wetland can be fully exerted, and the higher denitrification efficiency of the artificial wetland device can be ensured at low temperature; the artificial wetland device has good treatment effect and high stability on low-pollution water in winter. (4) A combination of continuous and batch operation may be used. The continuous operation can respectively realize an up-going mode and a down-going mode, the water conservancy residence time can be accurately controlled through the flow, and the treated effluent is superior to the ground surface V-type water standard.
It can be seen that, in the prior art, the technical scheme of improving the total nitrogen removal of the tail water wetland with carbon-nitrogen imbalance by using aquatic plants has the following technical defects;
1. at present, a mode of alternately planting cold season plants and warm season plants is mainly utilized, however, the cold season plants mainly live in cold seasons such as winter and the like, the cold seasons such as winter and the like are low in temperature and relatively short in sunlight time, and therefore metabolism such as photosynthesis and the like of the plants is slow, so that the planting area of the cold season plants is generally larger than that of the warm season plants at present, the area ratio mentioned in the patent is 2: 1, so that stable tail water treatment can be realized all the year round, the wetland area is inevitably wasted in summer, and elbows are seen in winter by grabbing;
2. at present, the tail water treatment by using aquatic plants depends more on the self-growing longitudinal state of the aquatic plants, if an emergency occurs, for example, the nutrition of the tail water has special conditions, the growth of the aquatic plants is not good, the tail water treatment is not perfect, and the zero tolerance to the tail water pollution is obviously not proper;
in view of the above technical problems, it is desirable to provide an active method and system for improving the total nitrogen removal rate of a carbon-nitrogen imbalance tail water wetland for environmental management without completely depending on the natural environment, which can make aquatic plants better adapt to the environment and treat tail water when the nutrition of the tail water changes, and which is simple in engineering, easy to reform and low in cost. However, the prior art has not provided an effective solution to the above technical problem.
Disclosure of Invention
The invention aims to provide a method for improving the total nitrogen removal rate of a tail water wetland with unbalanced carbon and nitrogen for environmental control, and the method is used for solving the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for improving the total nitrogen removal rate of a tail water wetland with carbon-nitrogen imbalance for environmental management comprises
The system comprises a primary filter tank, a stabilization tank, a surface flow wetland, a three-dimensional wetland, a central control system and a solid combustion power station; the tail water sequentially passes through the parts to complete the improvement of the total nitrogen removal rate;
wherein, the first-stage filter tank intussuseption is filled with the filler, and from the top down the filling layer does in proper order: a first layer; cobblestones, second layer: elutriating zeolite or shale, and taking fine sand as a third layer;
step S1, enabling tail water to be treated to flow through a primary filter tank, arranging a water return pipe and a first water quality sensor at the water outlet end of the filter tank, and enabling the first water quality sensor to be in communication connection with the central control system; the water at the water outlet end is discharged to the stabilization tank, and meanwhile, the water can flow back to the inlet of the primary filter tank through the water return pipe; the water return pipe is provided with a one-way valve, only water is allowed to flow back to the inlet direction from the outlet of the primary filter tank, and when the water quality sensor detects that the water quality filtered by the primary filter tank cannot meet the requirement of flowing into the stabilization tank, the one-way valve is opened to realize water by an active mode or an automatic mode of pumping;
step S2, filtering water flow, standing in a stabilization tank, making the water flow stable, basically stable in oxygen content, carbon dioxide content and water temperature, and then flowing into a surface flow wetland, wherein the surface flow wetland is built into a plurality of small squares by porous bricks, warm season plants are planted in part of the small squares, and cold season plants are planted in the squares between adjacent warm season plants; at least one square grid is separated among the warm-season plants, and an interplanting mode is adopted, so that the surface flow wetland in all seasons is ensured to have aquatic plants, and the attractiveness is not influenced; a water temperature thermometer is arranged on the surface flow wetland;
the aquatic plants are planted in the surface flow wetland and the three-dimensional water pool, the wetland area is divided into different blocks, and the growth stages of different aquatic plants are different, so that the maturity time of the aquatic plants in each block is different, the aquatic plants are guaranteed to be mature and harvested all the time, the solid combustion power station is maintained to have fuel for generating electricity, and solid matters left after combustion of the solid combustion power station are used as fertilizer of the surface flow wetland and applied to the three-dimensional water pool;
step S3, the three-dimensional water pool adopts a wetland formed by a deeper water pool, wherein shallow emergent aquatic plants are planted on the upper surface of the three-dimensional water pool, floating leaf plants mainly comprise water hyacinth, floating bed plants mainly comprise cold season cress, and the total coverage of the plants is more than 20%; the aquatic plant community of the ecological water delivery canal comprises submerged plants and emergent plants, wherein the submerged plants comprise potamogeton crispus and spica foxtail algae, the emergent plants mainly comprise reed, floral-leaf giant reed, typha and aquatic iris, and the coverage of the aquatic plants on the water surface is 30-50%; the surface flow wetland aquatic plants comprise Phragmites communis, Arundo donax Linn, Typha orientalis and aquatic iris; the aquatic plant community of the horizontal subsurface wetland takes reed and aquatic iris as main parts;
step S4, the surface flow wetland is provided with a temperature sensing device for detecting the water temperature of the surface flow wetland and sending the water temperature to the central controller, the central controller monitors the water temperature of the surface flow wetland, and when the water temperature is lower than the optimum temperature of the aquatic plants of the surface flow wetland, the central controller controls the injection amount of a warm water injection port so as to ensure that the temperature of the surface flow wetland is basically maintained within a temperature range suitable for the aquatic plants; wherein the warm water is from warm water produced by the solid combustion power plant;
step S5, the combustion materials of the solid combustion power station come from aquatic plants fished out from the surface flow wetland and the three-dimensional water tank; wherein the water used for power generation is tail water which is treated by the three-dimensional water tank and filtered by the filter tank, and carbon dioxide in the tail gas of the solid combustion power station is collected;
and introducing the carbon dioxide into the surface flow wetland to supplement a C source, and reducing the carbon-nitrogen ratio imbalance in the water body, so that the water body is more suitable for the growth of aquatic plants.
In this case, the waste heat generated by the solid combustion power plant is dried by the aquatic plant drying apparatus, thereby further utilizing the waste heat of the solid combustion power plant.
The aquatic plant cultivation method further comprises a livestock or poultry cultivation part, wherein the harvested mature aquatic plants, which can be eaten by livestock or poultry, are collected, crushed and correspondingly processed to be used as feed components of the livestock or poultry.
In the scheme, a solar power generation panel is arranged at the edge of the pool so as to generate power for the central controller.
In addition, the scheme also provides a system for improving the total nitrogen removal rate of the tail water wetland with carbon-nitrogen imbalance for environmental management, which comprises a primary filter tank, a stabilization tank, a surface flow wetland, a three-dimensional wetland, a solid combustion power station and a central control system;
the filter tank is filled with filler, and the filling layers from top to bottom are as follows: a first layer; cobblestones, second layer: elutriating zeolite or shale, and taking fine sand as a third layer;
tail water to be treated flows into the primary filter tank through the inlet of the primary filter tank, a water quality sensor I and a water return pipe are arranged at the water outlet end of the primary filter tank, and the water quality sensor I is in communication connection with the central control system; the water at the water outlet end is discharged to the stabilization tank, and can flow back to the inlet of the primary filter tank through the water return pipe; the water return pipe is provided with a one-way valve, only water is allowed to flow back to the inlet direction from the outlet of the primary filter tank, and when the water quality sensor detects that the water quality filtered by the primary filter tank cannot meet the requirement of flowing into the stabilization tank, the one-way valve is opened to realize water by an active mode or an automatic mode of pumping;
after water flow is filtered and then is kept still in a stabilizing pool, the water flow is stable basically with oxygen content, carbon dioxide content and water temperature, and then flows into a surface flow wetland, the surface flow wetland is built into a plurality of small squares by porous bricks, warm season plants are planted in partial small squares, and cold season plants are planted in the squares between adjacent warm season plants; at least one square grid is arranged among the warm-season plants, and an interplanting mode is adopted, so that the surface flow wetland all the year round is ensured to have aquatic plants;
the three-dimensional water tank adopts a wetland formed by a deeper water tank, wherein shallow emergent aquatic plants are planted on the upper surface of the three-dimensional water tank; the aquatic plant community of the ecological water delivery canal comprises submerged plants and emergent plants, wherein the submerged plants comprise curly pondweed and spica foxtail algae, and the emergent plants mainly comprise reed, floral leaf giant reed, typha and aquatic iris; the surface flow wetland aquatic plants comprise Phragmites communis, Arundo donax Linn, Typha orientalis and aquatic iris; the aquatic plant community of the horizontal subsurface wetland takes reed and aquatic iris as main parts; the three-dimensional water pool is provided with a water temperature stabilization sensing device II;
the solid fuel power station, wherein the combustion products of the solid fuel power station are from aquatic plants fished out from the surface flow wetland and the stereoscopic water pool; the water used for power generation is tail water which is treated by the three-dimensional water tank and filtered by the filter tank, carbon dioxide in the tail gas of the solid combustion power station is collected, the carbon dioxide is introduced into the surface flow wetland to supplement a carbon source in the surface flow wetland, and the carbon-nitrogen ratio imbalance in the water body is reduced;
meanwhile, the first temperature sensing equipment arranged on the surface flow wetland is used for detecting the water temperature of the surface flow wetland and sending the water temperature to the central controller, the central controller monitors the water temperature of the surface flow wetland, and when the water temperature is lower than the optimal temperature of aquatic plants of the surface flow wetland, the central controller controls the injection amount of a warm water injection port from the solid combustion power station so as to ensure that the temperature of the surface flow wetland is basically maintained in a temperature range suitable for the aquatic plants; wherein the warm water is from warm water produced by the solid combustion power plant;
the second temperature sensing equipment is arranged in the three-dimensional water pool and used for detecting the water temperature of the three-dimensional water pool and sending the water temperature to the central controller, the central controller monitors the water temperature of the three-dimensional water pool, and when the water temperature is lower than the optimal temperature of the aquatic plants in the three-dimensional water pool, the central controller controls the injection amount of the warm water injection port so as to ensure that the temperature of the three-dimensional water pool is basically maintained within a temperature range suitable for the aquatic plants; wherein the warm water is warm water produced by the solid combustion power plant.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention realizes the cross arrangement by utilizing different growth periods of different aquatic plants, thereby providing earlier uniformity of the plants.
2. The invention salvages the overgrowth or the aquatic plants in the later period, on one hand, the aquatic plants are combusted to generate electricity, thereby converting nitrogen into N2, and simultaneously carbon of carbon dioxide is introduced into water again, so that the consumption of a C source is reduced, and the N source is consumed.
3. The intelligent medicine taking reminding system controlled by the wearable device is combined with biological straw power generation, power generation is carried out while water is purified, in addition, the C source is repeatedly input and synthesized, and finally, more N sources are consumed, so that the imbalance of the C/D ratio is reduced.
4. The invention utilizes the heat energy generated by fuel power generation and hot waste water to be introduced into tail water in a proper proportion, thereby providing the temperature of the tail water treatment wetland, providing the growing season segments of warm season plants, improving the wetland treatment capacity of the tail water, using less wetland area and playing a role in solving wetland resources.
Drawings
FIG. 1 is a schematic overall flow chart of the present invention.
In the figure: 1. a primary filter tank; 2. a stabilization tank; 3. surface flow wetland; 4. a three-dimensional wetland; 5. a central control system; 6. an outlet port; 7. a solid-combustion power plant; 8. a water return pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, the present invention provides a technical solution: a method for improving the total nitrogen removal rate of a tail water wetland with carbon-nitrogen imbalance for environmental management comprises
The system comprises a primary filter tank 1, a stabilization tank 2, a surface flow wetland 3, a three-dimensional wetland 4, a central control system 5 and a solid combustion power station; the tail water sequentially passes through the parts to complete the improvement of the total nitrogen removal rate;
wherein, the first-stage filter tank 1 is filled with filler, and the filling layer from top to bottom is as follows in sequence: a first layer; cobblestones, second layer: elutriating zeolite or shale, and taking fine sand as a third layer;
step S1, enabling tail water to be treated to flow through a primary filter tank, arranging a water return pipe and a first water quality sensor at the water outlet end of the filter tank, and enabling the first water quality sensor to be in communication connection with the central control system 6; the water at the water outlet end is discharged to the stabilization tank, and meanwhile, the water can flow back to the inlet of the primary filter tank through the water return pipe; the water return pipe is provided with a one-way valve (not shown in the figure), only allows water to flow back from the outlet of the primary filter tank to the inlet direction, and when the water quality sensor detects that the water quality filtered by the primary filter tank cannot meet the requirement of flowing into the stabilization tank, the one-way valve is opened to realize water by an active mode or an automatic mode of pumping;
step S2, filtering water flow, standing in a stabilization tank, making the water flow stable, basically stable in oxygen content, carbon dioxide content and water temperature, and then flowing into a surface flow wetland, wherein the surface flow wetland is built into a plurality of small squares by porous bricks, warm season plants are planted in part of the small squares, and cold season plants are planted in the squares between adjacent warm season plants; at least one square grid is separated among the warm-season plants, and an interplanting mode is adopted, so that the surface flow wetland in all seasons is ensured to have aquatic plants, and the attractiveness is not influenced; a water temperature thermometer is arranged on the surface flow wetland;
step S3, the three-dimensional water pool adopts a wetland formed by a deeper water pool, wherein shallow emergent aquatic plants are planted on the upper surface of the three-dimensional water pool, floating leaf plants mainly comprise water hyacinth, floating bed plants mainly comprise cold season cress, and the total coverage of the plants is more than 20%; the aquatic plant community of the ecological water delivery canal comprises submerged plants and emergent plants, wherein the submerged plants comprise potamogeton crispus and spica foxtail algae, the emergent plants mainly comprise reed, floral-leaf giant reed, typha and aquatic iris, and the coverage of the aquatic plants on the water surface is 30-50%; the surface flow wetland aquatic plants comprise Phragmites communis, Arundo donax Linn, Typha orientalis and aquatic iris; the aquatic plant community of the horizontal subsurface wetland takes reed and aquatic iris as main parts;
step S4, the surface flow wetland is provided with a temperature sensing device for detecting the water temperature of the surface flow wetland and sending the water temperature to the central controller, the central controller monitors the water temperature of the surface flow wetland, and when the water temperature is lower than the optimum temperature of the aquatic plants of the surface flow wetland, the central controller controls the injection amount of a warm water injection port so as to ensure that the temperature of the surface flow wetland is basically maintained within a temperature range suitable for the aquatic plants; wherein the warm water is from warm water produced by the solid combustion power plant;
step S5, the combustion materials of the solid combustion power station come from aquatic plants fished out from the surface flow wetland and the three-dimensional water tank; wherein the water used for power generation is tail water which is treated by the three-dimensional water tank and filtered by the filter tank, and carbon dioxide in the tail gas of the solid combustion power station is collected;
and introducing the carbon dioxide into the surface flow wetland to supplement a C source, and reducing the carbon-nitrogen ratio imbalance in the water body, so that the water body is more suitable for the growth of aquatic plants.
Preferably, a solar power generation panel is provided at the edge of the pool to generate power for the central controller.
Preferably, the planting proportion of the cold-season plants and the warm-season plants is as follows: 1.3: 1-1: 1. This application adopts the technological means who utilizes temperature intervention and carbon dioxide recovery to intervene, can improve the planting and the growth time of the season plant of heating greatly to reduce the planting quantity of the slow cold season plant of growing, make tail water treatment capacity stronger.
Preferably, the aquatic plants are planted in the surface flow wetland and the stereoscopic pool, the wetland area is divided into different blocks, and the growth stages of different aquatic plants are different, so that the maturation time of the aquatic plants in each block is different, the aquatic plants are always matured and harvested, the fuel for generating power in the solid combustion power station is maintained, and the aquatic plants cannot be treated due to over-concentrated maturation.
Preferably, the solid matter remaining after the combustion in the solid combustion power plant is used as fertilizer for the surface flow wetland and is applied to the vertical pond.
Preferably, the waste heat generated by the solid combustion power station is dried by the aquatic plant drying device, so that the waste heat of the solid combustion power station is further utilized.
Preferably, the aquatic plant cultivation method further comprises a livestock or poultry cultivation part, and the harvested mature aquatic plants, which can be eaten by livestock or poultry, are collected, crushed and treated correspondingly and are used as feed components of the livestock or poultry.
The second embodiment is as follows:
on the other hand, the application also provides a system for improving the total nitrogen removal rate of the carbon-nitrogen imbalance tail water wetland, which comprises a primary filter tank 1, a stabilization tank 2, a surface flow wetland 3, a three-dimensional wetland 4, a solid combustion power station 5 and a central control system 6;
the filter tank 1 is filled with filler, and the filling layers from top to bottom are as follows: a first layer; cobblestones, second layer: elutriating zeolite or shale, and taking fine sand as a third layer;
tail water to be treated flows into the primary filter tank through the inlet of the primary filter tank, a first water quality sensor and a return pipe 8 are arranged at the water outlet end of the primary filter tank, and the first water quality sensor is in communication connection with the central control system 6; the water at the water outlet end is discharged to the stabilization tank, and meanwhile, the water can flow back to the inlet of the primary filter tank through the water return pipe; the water return pipe is provided with a one-way valve (not shown in the figure), only allows water to flow back from the outlet of the primary filter tank to the inlet direction, and when the water quality sensor detects that the water quality filtered by the primary filter tank cannot meet the requirement of flowing into the stabilization tank, the one-way valve is opened to realize water by an active mode or an automatic mode of pumping;
after water flow is filtered and then is kept still in a stabilizing pool, the water flow is stable basically with oxygen content, carbon dioxide content and water temperature, and then flows into a surface flow wetland, the surface flow wetland is built into a plurality of small squares by porous bricks, warm season plants are planted in partial small squares, and cold season plants are planted in the squares between adjacent warm season plants; at least one square grid is separated among the warm-season plants, and an interplanting mode is adopted, so that the surface flow wetland in all seasons is ensured to have aquatic plants, and the attractiveness is not influenced; a first water temperature sensing device is arranged on the surface flow wetland;
the three-dimensional water pool adopts a wetland formed by a deeper water pool, wherein shallow emergent aquatic plants are planted on the upper surface of the three-dimensional water pool, floating leaf plants mainly comprise water hyacinth, floating bed plants mainly comprise cold-season cress, and the total coverage of the plants is more than 20%; the aquatic plant community of the ecological water delivery canal comprises submerged plants and emergent plants, wherein the submerged plants comprise potamogeton crispus and spica foxtail algae, the emergent plants mainly comprise reed, floral-leaf giant reed, typha and aquatic iris, and the coverage of the aquatic plants on the water surface is 30-50%; the surface flow wetland aquatic plants comprise Phragmites communis, Arundo donax Linn, Typha orientalis and aquatic iris; the aquatic plant community of the horizontal subsurface wetland takes reed and aquatic iris as main parts; the three-dimensional water pool is provided with a water temperature stabilization sensing device II;
the solid fuel power station 7, wherein the combustion products of the solid fuel power station are from aquatic plants fished out from the surface flow wetland and the stereoscopic water pool; the water used for power generation is tail water which is treated by the three-dimensional water tank and filtered by the filter tank, carbon dioxide in the tail gas of the solid combustion power station is collected, the carbon dioxide is introduced into the surface flow wetland to supplement a C source, and the carbon-nitrogen ratio imbalance in the water body is reduced, so that the water body is more suitable for the growth of aquatic plants;
meanwhile, the first temperature sensing equipment arranged on the surface flow wetland is used for detecting the water temperature of the surface flow wetland and sending the water temperature to the central controller, the central controller monitors the water temperature of the surface flow wetland, and when the water temperature is lower than the optimal temperature of aquatic plants of the surface flow wetland, the central controller controls the injection amount of a warm water injection port from the solid combustion power station so as to ensure that the temperature of the surface flow wetland is basically maintained in a temperature range suitable for the aquatic plants; wherein the warm water is from warm water produced by the solid combustion power plant;
the second temperature sensing equipment is arranged in the three-dimensional water pool and used for detecting the water temperature of the three-dimensional water pool and sending the water temperature to the central controller, the central controller monitors the water temperature of the three-dimensional water pool, and when the water temperature is lower than the optimal temperature of the aquatic plants in the three-dimensional water pool, the central controller controls the injection amount of the warm water injection port so as to ensure that the temperature of the three-dimensional water pool is basically maintained within a temperature range suitable for the aquatic plants; wherein the warm water is warm water produced by the solid combustion power plant.
Preferably, a solar power generation panel is provided at the edge of the pool to generate power for the central controller.
Preferably, the planting proportion of the cold-season plants and the warm-season plants is as follows: 1.3: 1-1: 1. This application adopts the technological means who utilizes temperature intervention and carbon dioxide recovery to intervene, can improve the planting and the growth time of the season plant of heating greatly to reduce the planting quantity of the slow cold season plant of growing, make tail water treatment capacity stronger.
Preferably, the aquatic plants are planted in the surface flow wetland and the stereoscopic pool, the wetland area is divided into different blocks, and the growth stages of different aquatic plants are different, so that the maturation time of the aquatic plants in each block is different, the aquatic plants are always matured and harvested, the fuel for generating power in the solid combustion power station is maintained, and the aquatic plants cannot be treated due to over-concentrated maturation.
Preferably, the solid matter remaining after the combustion in the solid combustion power plant is used as fertilizer for the surface flow wetland and is applied to the vertical pond.
Preferably, the waste heat generated by the solid combustion power station is dried by the aquatic plant drying device, so that the waste heat of the solid combustion power station is further utilized.
Preferably, the aquatic plant cultivation method further comprises a livestock or poultry cultivation part, and the harvested mature aquatic plants, which can be eaten by livestock or poultry, are collected, crushed and treated correspondingly and are used as feed components of the livestock or poultry.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A method for improving the total nitrogen removal rate of a tail water wetland with carbon-nitrogen imbalance for environmental management comprises
The system comprises a primary filter tank, a stabilization tank, a surface flow wetland, a three-dimensional wetland, a central control system and a solid combustion power station; the tail water sequentially passes through the parts to complete the improvement of the total nitrogen removal rate;
wherein, the first-stage filter tank intussuseption is filled with the filler, and from the top down the filling layer does in proper order: a first layer; cobblestones, second layer: elutriating zeolite or shale, and taking fine sand as a third layer;
step S1, enabling tail water to be treated to flow through a primary filter tank, arranging a water return pipe and a first water quality sensor at the water outlet end of the filter tank, and enabling the first water quality sensor to be in communication connection with the central control system; the water at the water outlet end is discharged to the stabilization tank, and meanwhile, the water can flow back to the inlet of the primary filter tank through the water return pipe; the water return pipe is provided with a one-way valve, only water is allowed to flow back to the inlet direction from the outlet of the primary filter tank, and when the water quality sensor detects that the water quality filtered by the primary filter tank cannot meet the requirement of flowing into the stabilization tank, the one-way valve is opened to realize water by an active mode or an automatic mode of pumping;
step S2, filtering water flow, standing in a stabilization tank, making the water flow stable, basically stable in oxygen content, carbon dioxide content and water temperature, and then flowing into a surface flow wetland, wherein the surface flow wetland is built into a plurality of small squares by porous bricks, warm season plants are planted in part of the small squares, and cold season plants are planted in the squares between adjacent warm season plants; at least one square grid is separated among the warm-season plants, and an interplanting mode is adopted, so that the surface flow wetland in all seasons is ensured to have aquatic plants, and the attractiveness is not influenced; a water temperature thermometer is arranged on the surface flow wetland;
the aquatic plants are planted in the surface flow wetland and the three-dimensional water pool, the wetland area is divided into different blocks, and the growth stages of different aquatic plants are different, so that the maturity time of the aquatic plants in each block is different, the aquatic plants are guaranteed to be mature and harvested all the time, the solid combustion power station is maintained to have fuel for generating electricity, and solid matters left after combustion of the solid combustion power station are used as fertilizer of the surface flow wetland and applied to the three-dimensional water pool;
step S3, the three-dimensional water pool adopts a wetland formed by a deeper water pool, wherein shallow emergent aquatic plants are planted on the upper surface of the three-dimensional water pool, floating leaf plants mainly comprise water hyacinth, floating bed plants mainly comprise cold season cress, and the total coverage of the plants is more than 20%; the aquatic plant community of the ecological water delivery canal comprises submerged plants and emergent plants, wherein the submerged plants comprise potamogeton crispus and spica foxtail algae, the emergent plants mainly comprise reed, floral-leaf giant reed, typha and aquatic iris, and the coverage of the aquatic plants on the water surface is 30-50%; the surface flow wetland aquatic plants comprise Phragmites communis, Arundo donax Linn, Typha orientalis and aquatic iris; the aquatic plant community of the horizontal subsurface wetland takes reed and aquatic iris as main parts;
step S4, the surface flow wetland is provided with a temperature sensing device for detecting the water temperature of the surface flow wetland and sending the water temperature to the central controller, the central controller monitors the water temperature of the surface flow wetland, and when the water temperature is lower than the optimum temperature of the aquatic plants of the surface flow wetland, the central controller controls the injection amount of a warm water injection port so as to ensure that the temperature of the surface flow wetland is basically maintained within a temperature range suitable for the aquatic plants; wherein the warm water is from warm water produced by the solid combustion power plant;
step S5, the combustion materials of the solid combustion power station come from aquatic plants fished out from the surface flow wetland and the three-dimensional water tank; wherein the water used for power generation is tail water which is treated by the three-dimensional water tank and filtered by the filter tank, and carbon dioxide in the tail gas of the solid combustion power station is collected;
and introducing the carbon dioxide into the surface flow wetland to supplement a C source, and reducing the carbon-nitrogen ratio imbalance in the water body, so that the water body is more suitable for the growth of aquatic plants.
2. The method for improving the total nitrogen removal rate of the tail water wetland with carbon-nitrogen imbalance for environmental improvement according to claim 1, characterized by comprising the following steps: and drying the waste heat generated by the solid combustion power station through the aquatic plant drying equipment, thereby further utilizing the waste heat of the solid combustion power station.
3. The method for improving the total nitrogen removal rate of the tail water wetland with carbon-nitrogen imbalance for environmental improvement according to claim 1, characterized by comprising the following steps: and a livestock or poultry raising part, wherein the harvested mature aquatic plants, which can be eaten by livestock or poultry, are collected, crushed and treated correspondingly, and are used as feed components of the livestock or poultry.
4. The method for improving the total nitrogen removal rate of the tail water wetland with carbon-nitrogen imbalance for environmental improvement according to claim 1, characterized by comprising the following steps: and a solar power generation panel is arranged at the edge of the water pool so as to generate power for the central controller.
5. A system for improving the total nitrogen removal rate of a carbon-nitrogen imbalance tail water wetland for environmental management comprises a primary filter tank, a stabilization tank, a surface flow wetland, a three-dimensional wetland, a solid combustion power station and a central control system;
the filter tank is filled with filler, and the filling layers from top to bottom are as follows: a first layer; cobblestones, second layer: elutriating zeolite or shale, and taking fine sand as a third layer;
tail water to be treated flows into the primary filter tank through the inlet of the primary filter tank, a water quality sensor I and a water return pipe are arranged at the water outlet end of the primary filter tank, and the water quality sensor I is in communication connection with the central control system; the water at the water outlet end is discharged to the stabilization tank, and can flow back to the inlet of the primary filter tank through the water return pipe; the water return pipe is provided with a one-way valve, only water is allowed to flow back to the inlet direction from the outlet of the primary filter tank, and when the water quality sensor detects that the water quality filtered by the primary filter tank cannot meet the requirement of flowing into the stabilization tank, the one-way valve is opened to realize water by an active mode or an automatic mode of pumping;
after water flow is filtered and then is kept still in a stabilizing pool, the water flow is stable basically with oxygen content, carbon dioxide content and water temperature, and then flows into a surface flow wetland, the surface flow wetland is built into a plurality of small squares by porous bricks, warm season plants are planted in partial small squares, and cold season plants are planted in the squares between adjacent warm season plants; at least one square grid is arranged among the warm-season plants, and an interplanting mode is adopted, so that the surface flow wetland all the year round is ensured to have aquatic plants;
the three-dimensional water tank adopts a wetland formed by a deeper water tank, wherein shallow emergent aquatic plants are planted on the upper surface of the three-dimensional water tank; the aquatic plant community of the ecological water delivery canal comprises submerged plants and emergent plants, wherein the submerged plants comprise curly pondweed and spica foxtail algae, and the emergent plants mainly comprise reed, floral leaf giant reed, typha and aquatic iris; the surface flow wetland aquatic plants comprise Phragmites communis, Arundo donax Linn, Typha orientalis and aquatic iris; the aquatic plant community of the horizontal subsurface wetland takes reed and aquatic iris as main parts; the three-dimensional water pool is provided with a water temperature stabilization sensing device II;
the solid fuel power station, wherein the combustion products of the solid fuel power station are from aquatic plants fished out from the surface flow wetland and the stereoscopic water pool; the water used for power generation is tail water which is treated by the three-dimensional water tank and filtered by the filter tank, carbon dioxide in the tail gas of the solid combustion power station is collected, the carbon dioxide is introduced into the surface flow wetland to supplement a carbon source in the surface flow wetland, and the carbon-nitrogen ratio imbalance in the water body is reduced;
meanwhile, the first temperature sensing equipment arranged on the surface flow wetland is used for detecting the water temperature of the surface flow wetland and sending the water temperature to the central controller, the central controller monitors the water temperature of the surface flow wetland, and when the water temperature is lower than the optimal temperature of aquatic plants of the surface flow wetland, the central controller controls the injection amount of a warm water injection port from the solid combustion power station so as to ensure that the temperature of the surface flow wetland is basically maintained in a temperature range suitable for the aquatic plants; wherein the warm water is from warm water produced by the solid combustion power plant;
the second temperature sensing equipment is arranged in the three-dimensional water pool and used for detecting the water temperature of the three-dimensional water pool and sending the water temperature to the central controller, the central controller monitors the water temperature of the three-dimensional water pool, and when the water temperature is lower than the optimal temperature of the aquatic plants in the three-dimensional water pool, the central controller controls the injection amount of the warm water injection port so as to ensure that the temperature of the three-dimensional water pool is basically maintained within a temperature range suitable for the aquatic plants; wherein the warm water is warm water produced by the solid combustion power plant.
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