337 results about "Eutrophication" patented technology

The invention relates to a hydrodynamic force and water quality coordinated regulation and control method for a river channel and multi-pond communication system, which comprises the following steps of: quantifying a trade-off relationship between HRT and pollutant removal rate by coupling hydrodynamic force and water quality models, and introducing a dynamic regulation and control strategy; the problems of insufficient model separation and eutrophication risk control, single regulation and control means, disjunction of design parameters and engineering effects and the like in the prior art are solved, and the water quality improvement effect and the operation stability of the river-pond communication system are remarkably improved.

The invention provides a salt-tolerant plant constructed wetland system for treating eutrophicated mariculture wastewater, which specifically comprises a lower filler formed by mineral materials, and a middle filler formed by modified zeolite, sodium alginate coated vermiculite, rice husk charcoal, oyster shell, coral sand and diatomite, the surface filler is composed of intertidal zone bottom mud, intertidal zone raw water, coastal saline-alkali soil and composite algae powder, and the three fillers are combined with salt-tolerant plant breeding, bow-shaped water flow optimization and layered collaborative design; the core problems of poor salt tolerance, low adsorption efficiency, easiness in blockage, high maintenance cost and the like of the traditional constructed wetland during treatment of the mariculture wastewater are systematically solved.

The invention discloses an hour-scale lake algal bloom space distribution prediction method based on a stationary satellite, and the method comprises the steps: obtaining the hourly wind speed, wind direction, air temperature and other meteorological data and GOCI series satellite remote sensing data, and extracting the algal bloom coverage through an algal bloom recognition index; based on the priori knowledge of wind-driven algae bloom migration and accumulation, constructing a new characteristic index by using a wind direction and a remote sensing index; selecting representative algal bloom samples, extracting data such as wind speed, air temperature and remote sensing indexes of sample points in the same time period to construct a sample database, training a machine learning model and verifying the model precision; the model is applied to a typical eutrophicated lake to test the precision performance of the model, and the algal bloom distribution condition at the current moment and the environmental data at the subsequent moment are utilized to predict the algal bloom spatial distribution change of the lake hour by hour through model iteration. According to the method, prediction and early warning of the spatial position and the outbreak intensity of lake algal blooms in an hour scale can be realized, and prevention and control of eutrophic lake algal blooms are assisted.

The invention belongs to the technical field of remote sensing information processing, and particularly relates to a water chlorophyll a concentration inversion-oriented remote sensing time-space-spectrum fusion method, which realizes improvement of spatial resolution of a chlorophyll a concentration inversion sensitive wave band by fusing complementary information of different sensors on time-space-spectrum resolution. The method comprises the following steps of: establishing a water body chlorophyll a concentration inversion-oriented MSI and OLCI space-time spectrum fusion deep learning network, embedding a time sequence dynamic adjustment module, and establishing a water body chlorophyll a concentration inversion-oriented MSI and OLCI space-time spectrum fusion deep learning network for water body chlorophyll a concentration inversion. According to the method, the network can intelligently combine time and space features to generate a more accurate prediction image, an Adaboost machine learning joint inversion model is constructed based on time-space-spectrum fusion data and corresponding limited ground station data, and high-precision remote sensing inversion of the concentration of chlorophyll a is realized.

The invention relates to the technical field of water environment management, in particular to a reservoir ecological scheduling method and system considering water quality dynamic response. The method comprises the following steps: acquiring reservoir water quality monitoring data; performing water eutrophication analysis according to the reservoir water quality monitoring data to obtain water eutrophication data; pollution source tracking is carried out based on the water eutrophication data to obtain pollution source data; the pollutant emission intensity is evaluated based on the pollution source data; a high-pollution area is calibrated according to the pollutant emission intensity; carrying out algae density detection according to the high-pollution area to obtain algae density data; performing water algal toxin analysis according to the algae density data to obtain water algal toxin data; and obtaining reservoir hydrological data, and carrying out maximum rainfall feature extraction to obtain maximum rainfall data. The response rate and the pollution risk identification rate of reservoir water quality dynamic scheduling are improved based on the water environment management technology.

The invention discloses a coupling model framework for simulating nitrogen dynamics in a flowing water ecosystem and a construction method of the coupling model framework, and relates to the technical field of environmental protection, including hydrodynamic flow, substance diffusion between environmental media and microbial metabolism, and the construction method of the coupling model framework comprises the following steps: (1) establishing a hydrodynamic model; (2) establishing an inter-environmental-medium nitrogen transmission diffusion model; (3) establishing a gene center model of metabolism of inorganic nitrogen and organic nitrogen; (4) constructing a nitrogen dynamic numerical simulation system in the flowing water ecosystem in a coupling manner; and (5) decoupling a dominant factor and a nitrogen conversion mechanism of a nitrogen dynamic state in the quantification system. By simulating the nitrogen dynamic state of the flowing water ecosystem, dominant factors and a nitrogen conversion mechanism of the nitrogen dynamic state in the water ecosystem can be accurately described, so that effective suggestions can be provided for nitrogen dynamic regulation and control and eutrophication management and control of the water ecosystem.

The invention discloses a Granibacillus saccharophilus JLB-1, which is classified and named as Terribacillus saccharophilus JLB-1, is preserved in the China Center for Type Culture Collection on April 16, 2025, and has the preservation number of CCTCC (China Center for Type Culture Collection) NO: M 2025800. The invention also discloses a microbial inoculum prepared from the strain. The invention also discloses application of the bacillus subtilis and a microbial agent prepared from the bacillus subtilis in degrading COD and ammonia nitrogen in polluted water and inhibiting blue-green algae. The Granibacillus saccharophilus JLB-1 screened by the invention has efficient degradation capacity on COD (Chemical Oxygen Demand) and ammonia nitrogen in a polluted water body, remarkably inhibits the growth of blue-green algae, can be applied to biological treatment of polluted water bodies such as eutrophication water bodies, black and odorous water bodies and the like, and has very important application value and wide application prospect.

The invention discloses an ecological restoration system for mangrove forest wetlands, and relates to the technical field of ecological restoration of coastal wetlands, and the technical key points are as follows: the ecological restoration system comprises an algae-cleaning biocenosis: the number of algae is reduced through salt-tolerant algae-cleaning organisms, and the transparency of a water body is improved; the sea grass plant community comprises Sichuan fructus viticis and halophila acuminata, absorbs eutrophic substances in water through photosynthesis, and further purifies the water quality; aquatic animals comprise fishes, benthonic animals, shrimps and filter-feeding zooplanktons; the mangrove plant community is used for planting bruguiera gymnorrhiza, kandelia candel and aegiceras corniculatum in a layered manner according to tide and water depth so as to realize the functions of purifying water quality of an ecological system and providing a habitat; and the environment monitoring module is provided with tide monitoring equipment, observes tide water level change and salinity and alkalinity, and implements early warning and emergency measures under extreme climate conditions. According to the method, a multi-layer producer community system can be coupled and repaired, the eutrophication problem can be effectively solved by multi-dimensionally improving the biodiversity, and a new method is provided for coastal wetland repair.

The invention relates to the technical field of aquaculture, and particularly discloses paracoccus pantotrophus P.p-O8 and application of the paracoccus pantotrophus P.p-O8, the paracoccus pantotrophus P.p-O8 is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number of the paracoccus pantotrophus P.p-O8 is CGMCC NO.26522. The invention relates to a microbial inoculum prepared from paracoccus pantotrophus P.p-O8. The method has a huge application prospect in improving the quality of aquaculture water and repairing the polluted sediments in the cage culture area, improves the water environment quality and the survival conditions of aquaculture organisms, repairs the eutrophicated polluted ecological environment, and has high environmental protection value and economic benefit.

The invention relates to the technical field of water treatment filter materials, in particular to an intelligent clean gradient composite water purification filter element and a preparation method thereof. The filter element adopts an integrated design of'natural gradient base material + ZIF-67 function enhancement + fluorescence-ultrasonic intelligent regeneration ': modified vegetable sponge is used as a porous support layer, a silica gel / ZIF-67 composite gradient layer is constructed on the porous support layer to realize adsorption and antibacterial dual functions, and dopamine-aluminum ions are used for composite surface modification to enhance hydrophilicity and interlayer binding force; a matched automatic system senses pollution in real time through the fluorescence monitoring module and triggers the ultrasonic regeneration module to complete self-cleaning, and the flux recovery rate is larger than or equal to 97.5%; the interception rate of the filtering element to anabaena under the operation pressure of 0.1-0.3 MPa is larger than or equal to 99.2%, the filtering flux is increased by 6-8 times compared with that of a commercial element, the filtering element can tolerate complex water quality in the coexistence of drugs and personal care products, natural vegetable sponge serves as a base material, and the filtering element has the advantages of biocompatibility and low cost and is suitable for drinking water purification and eutrophication water body treatment.

The invention relates to the technical field of forest fertilization, in particular to a forest precise fertilization decision-making method and system based on soil nutrient profit and loss, and the method comprises the steps: obtaining basic information of a target forest land, and dividing forest growth stages based on the basic information; the method comprises the following steps: collecting an undisturbed soil sample and a mixed soil sample of a 0-40cm soil layer of a target forest land by adopting an S-shaped point distribution method, separating the mixed soil sample, and respectively measuring the soil nutrient content, the bioavailability, the soil enzyme activity and the microbial functional gene. According to the method, by measuring the dimension indexes, constructing a five-dimensional profit and loss evaluation index system for determining the reference value and dynamically adjusting the weight according to the forest land data, calculating the comprehensive profit and loss index, judging the nutrient state and generating the personalized fertilization scheme, the defects that an existing fertilization scheme is single in basis index and lacks an effective dynamic adjustment link are effectively overcome; the requirements of multi-generation continuous planting forest land are met, and the environmental risks such as fertilizer waste, soil acidification and water eutrophication are effectively reduced.

The invention discloses a floating type ecological restoration bionic robot conforming to the lake and reservoir environment and a restoration method.The robot comprises a jellyfish-shaped bionic floating device, a compartment type multi-parameter water quality monitoring module, a liquid medicament intelligent putting unit, a nanoscale zero-valent iron recycling unit and the like, and module integration is achieved through TPU flexible connecting pieces; and accurate operation is realized by using Beidou RTK (Real Time Kinematic) positioning and an LSTM-Transform model. According to the repairing method, dosing is triggered through multi-parameter monitoring, the nanometer materials are recycled in combination with magnetic separation adsorption and hydraulic disturbance, and a'monitoring-repairing-recycling 'closed loop is formed. A demonstration area verifies that the system can reduce the algae biomass weekly, reduce the migration rate of heavy metals in sediments and improve the recovery rate of nano zero-valent iron, is suitable for in-situ ecological restoration of eutrophicated lakes and reservoirs, and has high efficiency and sustainability.

According to the ecological system intelligent regulation and control technology and the restoration method thereof, a closed-loop metabolism system is constructed by integrating microorganisms, plants, algae, fishes and benthonic animals, and eutrophication is synergistically controlled through nutritive salt reduction and biological regulation and control. A three-layer monitoring network is constructed by adopting the Internet of Things and AI, and an active prevention and control mode of prediction, early warning and regulation is changed from tail-end treatment. The system is composed of a floating bed purification module, a biological regulation and control module, a microbial enhancement module, an intelligent monitoring module and a power control module, the ecological floating bed, the artificial aquatic plants and the aquatic plants are used for purifying water, the filter-feeding fishes and the benthonic animals are used for intercepting nitrogen and phosphorus, and the immobilized filler and the complex microbial inoculants are used for degrading pollutants. A multi-parameter sensor and an AI algorithm monitor, feed back and early warn in real time and generate a purification strategy, and autonomous movement and strategy adjustment of the equipment are achieved. The technology is suitable for lakes, reservoirs, river channels and other water areas, has the advantages of efficient purification, stability, intelligent regulation and control, environmental friendliness and the like, and has wide application prospects.

The invention provides a remote sensing estimation method for the chlorophyll a concentration of a river, and belongs to the technical field of hydrological remote sensing, and the method comprises the following steps: during a satellite transit period, sampling at a plurality of point locations of the river to obtain measured data, obtaining satellite data, carrying out Rayleigh scattering correction on the satellite data to obtain reflectivity after Rayleigh correction, and calculating the chlorophyll a concentration of the river; the method comprises the following steps: screening measured data, establishing an XGBoost model, training the model data, and calculating the chlorophyll a concentration of the river by using the trained XGBoost model. The invention relates to a river chlorophyll a concentration remote sensing estimation method by using Landsat and machine learning. According to the method, based on actually measured chlorophyll a concentration data of the Pearl River basin, a machine learning model capable of estimating the river chlorophyll a concentration is established by using Landsat data after Rayleigh scattering correction, a new thought is provided for monitoring river water quality, and powerful technical support is provided for river eutrophication monitoring and water environment protection and treatment.

The invention provides industrial cherax quadricarinatus aquaculture equipment which comprises an aquaculture pond and a buoyancy tank module, the buoyancy tank module is arranged in the aquaculture pond in a floating mode and linearly moves along the aquaculture pond, the buoyancy tank module comprises a rack assembly, a flow guide assembly and a filtering assembly, the flow guide assembly is used for pumping feed residues at the bottom of the aquaculture pond, and the filtering assembly is used for filtering the feed residues; the movable buoyancy tank module is arranged in the culture pond, in the process of moving along the culture pond, the flow guide assembly and the pump suction assembly are utilized to form a circulating water path, feed residues at the bottom of the pond are sucked and filtered out while the bottom of the pond is scoured, and the water surface end of the pond is cleaned. The water quality of the culture pond can be effectively maintained by matching with the filtering assembly arranged at the liquid level end, diseases caused by feed rotting are reduced, and the situation that the growth environment of the cherax quadricarinatus is affected due to algae outbreak caused by water eutrophication is avoided.

The invention discloses a water environment treatment material based on composite minerals and aquatic plants and a preparation method and application thereof, and belongs to the technical field of water environment treatment. The water environment treatment material comprises the composite minerals and the aquatic plants, the composite minerals can adsorb and convert heavy metal ions, ammonia nitrogen and organic pollutants, and by combining the absorption of the aquatic plants on nutrient substances and the decomposition effect of microorganisms on the pollutants, the concentration of the pollutants in a water body can be remarkably reduced, and the water quality index is improved; the problems of water eutrophication, heavy metal pollution, organic pollution and the like are effectively solved; the photosynthesis of the aquatic plants can absorb a large amount of carbon dioxide, carbon elements are transferred into the bottom mud for long-term storage, meanwhile, the existence of the complex minerals indirectly promotes the carbon sequestration effect of the aquatic plants, the carbon sequestration capacity of the whole water body ecological system is improved, and finally the multiple purposes of water body pollution treatment, bottom mud remediation, carbon sequestration and sink increase and the like are achieved. The health and the stability of a water body ecological system are improved.

The invention discloses a method for determining a toughness and catastrophe threshold value of a functional group of a water ecosystem, and relates to the technical field of water environment ecological engineering.The method comprises the steps that the state of a target water ecosystem is determined according to the total nitrogen content, the total phosphorus content and the chlorophyll content of a water body in the target water ecosystem, the state of the target water ecosystem is eutrophication or non-eutrophication; determining the biomass of phytoplankton based on the target water ecosystem state; utilizing an Ecopath model to construct a static food network relation model of the target water ecosystem; based on the target water ecosystem state, the biomass of the phytoplankton and the static food network relation model, determining a toughness threshold value and a catastrophe threshold value of the biomass of each functional group; each functional group is a plurality of groups for dividing species in the target water ecosystem. According to the method, the water ecosystem functional group toughness threshold value and the catastrophe threshold value which are simple to operate and high in accuracy can be provided.

The utility model relates to the technical field of submerged plant planting, in particular to a submerged plant rapid recovery device for a lake storm erosion area, which comprises a multi-hole platform-shaped body, medicament holes and planting holes are arranged in the body, medicament cabins for accommodating more than or equal to two medicaments and separating pieces for different medicaments are arranged in the medicament holes, and the planting holes are communicated with the medicament cabins. The medicament bin is communicated with the outside of the body, and the planting holes vertically penetrate through the top surface and the bottom surface of the body; the body is connected with a floating object through a rope, and a downward protruding part is arranged on the bottom face of the body. The gravity center of the body is located at the lower half part; the body can be released through the unmanned aerial vehicle, so that the planting efficiency is effectively improved; the body is fixed in position after sinking to the bottom and cannot be washed away by water flow, and submerged plant planting groups cannot be scattered by the water flow; the body can be found according to the floating objects, and recycling of the body is achieved; the submerged plants can rapidly take roots and grow in a eutrophicated water body with relatively high algae density after being put into the water body.

The invention relates to the technical field of environment management, in particular to an intelligent aquatic plant community optimization system which comprises a community recognition module, an adaptive screening module, a spacing adjustment module, a growth monitoring module and a response regulation and control module. According to the invention, through dynamic monitoring of plant growth states and optimization treatment of spatial configuration, accurate management of aquatic plant communities is realized, the matching degree of plant species and environmental conditions is enhanced, spacing and density configuration of plant planting are improved, resource competition among plants is effectively dealt with, and the yield of aquatic plants is improved. Through multi-dimensional plant growth state feedback and nutrition state monitoring, the plant configuration is adjusted in real time, so that the dynamic management of the community is more flexible, the singleness of the community structure is avoided, and effective intervention is performed aiming at the water eutrophication problem. The adaptability and growth quality of the plants are improved, overgrowth or decline of the plants in an unsuitable environment is avoided, and ecological restoration and water health are promoted.

The invention relates to the technical field of simulation laboratories, and discloses a multifunctional laboratory capable of simulating different marine environments based on ship body carrying, which comprises a ship body capable of simulating different marine environments and manufacturing various controllable flow fields from laminar flow to turbulent flow in an experiment cabin through a controllable flow field generation unit; through the controllable wave generation unit, waves with specified wave heights and periods can be generated in the experiment module; the water body temperature and salinity regulation and control unit is used for quickly and accurately regulating the temperature and salinity of the water body in the experiment module; water bodies with different turbidity and eutrophication levels are simulated through the environmental biological simulation unit; through an outside-in test mode, a sealing door at the bottom of the experiment module is opened, the underwater robot and other equipment are allowed to freely enter and exit, the dynamic response and control algorithm of the underwater robot when entering a complex environment (external real ocean) from a calm environment (in the experiment module) can be tested, and in-situ storage of a sampled sample can be realized.

The invention relates to the technical field of environment monitoring and remote sensing information processing, and discloses a remote sensing data coupled culture area nutritive salt concentration prediction method and system. The method comprises the following steps: constructing a physically constrained ecological hydrodynamic model to generate synthetic remote sensing-nutritive salt pairing data; fusing multi-source remote sensing and actual measurement data to form a high-dimensional feature tensor; separating breeding sensitive features from environment interference features through an attention-guided domain invariant feature decoupling network; migrating priori knowledge of a source domain large-scale culture area by using a dynamic weight cross-domain knowledge distillation architecture; and finally, real-time high-precision nutritive salt concentration distribution is smoothly output through a lightweight regression head and a time sequence. The system comprises corresponding functional units. According to the method, the prediction precision and stability in a small sample scene are improved, negative migration is inhibited, and support is provided for precise cultivation and eutrophication early warning.

The invention relates to the technical field of water quality monitoring, in particular to a digital twin water quality automatic monitoring and intelligent early warning method. The method comprises the following steps: arranging a multi-parameter sensor array in an entity water area, collecting real-time data of various water quality parameters, and recording the starting moment of each parameter deviating from a baseline value to form a parameter response time difference sequence; matching the parameter response time difference sequence with a preset pollution source time difference feature library to determine a pollution source type, and calculating a pollution feature coefficient according to the deviation degree; nighttime dissolved oxygen monitoring data in the real-time data are extracted, a dissolved oxygen forward change accumulated value is calculated to serve as a nighttime oscillation index, and when the nighttime oscillation index exceeds a preset oscillation threshold value, the water eutrophication risk is judged in combination with the pollution characteristic coefficient. Through parameter response time difference characteristic comparison and pollution characteristic coefficient calculation, the pollution source type and the pollution event stage can be automatically identified, and uncertainty is reduced.

Processes and systems for providing a CO2 enriched stream from an air stream, by: selectively adsorbing, in a first separation zone, CO2 and H2O in an air stream and providing a CO2 and H2O depleted gas stream; separating, in a second separation zone, the CO2 and H2O depleted gas stream and providing an N2 enriched stream, an O2 enriched stream, and an N2 enriched regeneration stream; heating the N2 enriched regeneration stream to provide a heated N2 enriched regeneration stream; selectively desorbing, in the first separation zone, the CO2 and H2O using the heated N2 enriched regeneration stream and providing a spent regeneration gas stream; drying the spent regeneration gas stream to remove H2O and providing a dried spent regeneration gas stream; and separating, in a third separation zone, the CO2 from the dried spent regeneration gas stream to provide a CO2 enriched stream.

The invention provides a method for preparing biochar from spartina alterniflora and application of the biochar in nitrogen and phosphorus removal, and belongs to the technical field of biological materials. According to the method, the widely distributed spartina alterniflora is converted into the biochar, so that high-value utilization of invasive plants is realized, and environmental pollution is reduced. The biochar provided by the invention has excellent performance in the aspects of nitrogen and phosphorus removal, effectively improves water eutrophication, improves water quality and protects an aquatic ecosystem. The preparation method is simple, cost is reduced, and large-scale production is facilitated. And the method is environment-friendly, does not generate secondary pollution, and accords with sustainable development. The invention not only provides a new environment restoration material, but also opens up a new way for biomass resource utilization, has remarkable economic and social benefits, improves public health, improves life quality and protects biological diversity.

The present invention discloses a rapid total nitrogen detection method for early warning, specifically related to the technical field of water quality monitoring. This method first detects and records multiple groups of data on the ammonia nitrogen value, nitrate nitrogen value, nitrite nitrogen value, pH value, and total nitrogen value at different positions in the water quality. Then, a linear model is established by summing the ammonia nitrogen, nitrate nitrogen, and nitrite nitrogen values and the total nitrogen value. Next, an accurate algorithm model is obtained by inversely compensating the total nitrogen value based on the pH value. Subsequently, the model is input into the internal system of the total nitrogen sensor connected to the early warning analysis unit. Finally, the sensor is installed in the water area to be detected for rapid detection and early warning. Its advantages are rapid detection, accurate results, and small sensor volume for easy installation, effectively solving many drawbacks of traditional total nitrogen detection methods, and can be widely applied to the water quality monitoring of various water areas, providing early warning for water eutrophication and other situations in a timely manner.

The present invention discloses a sediment interception and treatment system in a plain river network area, which includes a sediment interception tank arranged at the river connection point and the estuary, a conveying pipeline arranged along the river, a pneumatic pump, a treatment device, an automatic control system, and an estuary wetland system. The automatic control system includes a data center, a communication module, and water quality sensors and mud level sensors arranged in the sediment interception tank. The water quality sensors and mud level sensors are connected to the pneumatic pump through the data center via the communication module. The outlet of the treatment device is connected to the estuary wetland system. The sediment interception tank is formed by excavating the bottom sediment of the water body, and a support is arranged in the tank to support the communication module, water quality sensors, and mud level sensors. The present invention utilizes the characteristics of fine sediment particles, high water content, and large fluidity in the plain river network area to achieve automatic and rapid collection, in-depth treatment, and resource utilization of sediment from the river network to the estuary area, reduce the sediment and nutrient load entering the lake, and reduce the risk of eutrophication.

The invention discloses a method for combining straw returning to field, pond fish culture and rice, fish and soft-shelled turtle / shrimp comprehensive planting and breeding, and belongs to the technical field of rice, soft-shelled turtle, fish and shrimp comprehensive planting and breeding. After rice in the rice field is harvested, straw is smashed and returned to the field, a hidden survival place is provided for crayfish seedlings, rotten straw and derived zooplankter provide bait for crayfish and fish, and the straw decomposition rate is increased by eating; after water in the rice field module becomes serious along with straw rotting, the water is discharged into the culture pond through tail water treatment engineering treatment, and the water fertility of the pond is increased; meanwhile, after eutrophication of the water body in the culture pond, the water body is discharged into the rice field after being treated by a tail water treatment project and flows into the culture pond again after being further purified by the rice field. According to the constructed mode, the straw is converted into the organic fertilizer through the crayfish and the fish, and the paddy field is adopted for purifying pond culture tail water. No breeding wastewater is discharged in the mode. The investment of aquatic product baits and rice field fertilizers is reduced, and the income and quality of rice and fishes are increased.