13 results about "Low salinity" patented technology

The invention relates to a saline intrusion measurement method, system and equipment based on dynamic ship motion conditions and a medium, and aims to solve the technical problem that the salinity inversion precision is reduced due to spatial-temporal dislocation between particle image velocity measurement flow field data and plane laser-induced fluorescence concentration field data caused by ship six-degree-of-freedom motion. According to the method, future poses are predicted by collecting ship motion parameters and environment disturbance parameters, and space-time compensation parameters are generated in combination with a static calibration matrix; performing three-dimensional coordinate transformation and time synchronization on synchronously acquired original flow field and concentration field data by applying compensation parameters, and eliminating space-time deviation caused by ship movement; a three-dimensional salinity distribution field is calculated based on registration data fusion flow field diffusion characteristics and concentration field distribution; and meanwhile, the pose of the measuring equipment is dynamically adjusted through the closed-loop controller so as to optimize the data acquisition quality. According to the method, ship motion interference is effectively inhibited, and accurate characterization of saline invasion frontal surface spatial characteristics is guaranteed.

The utility model provides a coal-fired power plant high-low brine advanced treatment and recycling system which comprises an industrial wastewater storage pool, wherein water outlets of the industrial wastewater storage pools are connected with a main water outlet pipe through automatic valves, and the main water outlet pipe is sequentially connected with the PH adjusting tank, the reaction tank, the flocculation tank, the clarifier, the clean water pool and the final neutralization pool through a first lifting pump; the mixed bed regeneration wastewater high-salinity water is sequentially fed into a multi-medium filter for filtration, a self-cleaning filter, an ultrafiltration device and an ultrafiltration water tank through a lifting pump II and is fed into an ultraviolet sterilizer through a lifting pump III, and a water outlet of the ultraviolet sterilizer is connected with a security filter; a water outlet of the security filter is connected with the reverse osmosis device through a high-pressure pump; a fresh water outlet on the reverse osmosis device is connected with a fresh water tank and a concentrated water outlet is connected with a concentrated brine tank. According to the utility model, backwashing water and low-salt water are directly recycled to a desulfurization system after being filtered by the iron and manganese removal filter. And the mixed bed regeneration wastewater high-salinity water is discharged and treated by seawater reverse osmosis, so that recycling is achieved.

This invention relates to the development of heat-tolerant soft-shell clam (Mya arenaria) lines for aquaculture through selective breeding and molecular genetic approaches. Two methods are employed: (1) phenotype-based selection, in which clams are exposed to natural or controlled heat shock conditions (30-33° C.) and survivors are selected across successive generations and multiple populations; and (2) marker-assisted selection (MAS), utilizing single nucleotide polymorphisms (SNPs) identified through genome-wide association studies (GWAS) to select broodstock capable of producing heat-tolerant offspring. The resulting lines exhibit enhanced survival and endurance under elevated temperatures, particularly above the species' critical threshold of 28° C. These heat-tolerant clams enable sustainable aquaculture production in Maryland and other warm, low-salinity estuaries where soft-shell clams historically failed to survive summer heat.

The invention relates to the technical field of metal extraction, in particular to a process for extracting rubidium from sedimentary grey green salt lake clay. A technology for extracting rubidium from sedimentary grey green salt lake clay comprises the following steps that the sedimentary grey green salt lake clay is crushed and sieved, then fine particles are soaked in a leaching agent, and leaching liquid containing the rubidium element is obtained through filtering; wherein the leaching agent is prepared from concentrated hydrochloric acid, low-salinity water and mirabilite, the volume fraction of the concentrated hydrochloric acid is 30%-50%, and the liquid-solid ratio of the low-salinity water to the mirabilite is 30 mL: 1 g; the low-salinity water is natural water of the horse-sea basin. According to the method, rubidium is extracted by adopting a low-salinity water, concentrated hydrochloric acid and mirabilite composite leaching agent, rubidium ions are released through acidolysis reaction and ion exchange, the rubidium element is directly extracted from the sedimentary grey green salt lake clay, and an extraction process method and key parameters suitable for the rubidium element in the clay of the type in Mahai region of Qinghai are established.

A method for harvesting energy through pressure retarded osmosis includes identifying and pumping a low salinity feed stream and a high salinity feed stream from upstream water sources to opposite ends of a semi-permeable membrane housing where the low salinity feed stream permeates through the semi-permeable membrane to the high salinity feed stream to pressurize and dilute it. The diluted stream rotates a turbine to generate electricity and produce a depressurized mid-salinity fluid. A system for harvesting energy through pressure retarded osmosis has a first and second upstream water source pumped through low and high salinity feed lines to opposite ends of a semi-permeable membrane housing including a container, a semi-permeable membrane, a low salinity side of the housing, and a high salinity housing. The system also has a low salinity exit line, a pressurized mid-salinity exit line, a turbine, a generator, and a depressurized mid-salinity exit line.

The utility model provides a coal-fired power plant high-low brine deep coupling zero-emission deep treatment recycling system which comprises an industrial wastewater storage pool A, an industrial wastewater storage pool B and an industrial wastewater storage pool C, wherein water outlets of the industrial wastewater storage pool A, the industrial wastewater storage pool B and the industrial wastewater storage pool C are connected with a main water outlet pipe through automatic valves, and the main water outlet pipe is sequentially connected with a PH adjusting tank, a reaction tank, a flocculation tank, a clarifier, a clean water pool and a final neutralization pool through a lifting pump I; an outlet of the clean water tank is connected with a lift pump II; a low-salt-water outlet pipe and a high-salt-water outlet pipe are arranged at a discharge port of the lifting pump II, and the low-salt-water outlet pipe is connected with the iron and manganese removal filter; the high-salinity water outlet pipe is connected with the hot-method zero discharge system; the treatment of high-salinity water and the recycling of water resources are realized.

This invention relates to the field of ecological restoration technology and discloses a device for three-dimensional planting and rapid survival maintenance of salt-tolerant coastal vegetation. The device includes a planting separation mechanism, a protective isolation mechanism, a planting spread support mechanism, and a drainage isolation mechanism. The protective isolation mechanism is located on the outer surface of the planting separation mechanism, while the planting spread support mechanism is located inside both the planting separation and protective isolation mechanisms. The drainage isolation mechanism is fixedly connected to the bottom of the protective isolation mechanism. This device allows for three-dimensional planting of plants on the surfaces of the planting separation and protective isolation mechanisms using the planting spread support mechanism. This enables the plants to initially grow in areas with relatively low salinity. Later, as they mature, the plants gradually spread from the planting spread support mechanism to the area to be restored, allowing the plants to gradually adapt to and modify the environment.

The invention relates to a method and a system for desalinating seawater or brackish water to produce drinking water or low-salinity process water. The method is based on freeze-desalination of the appropriately contaminated water, wherein the freezing process takes place on hollow spheres in which a phase-change cold storage material is embedded. Various desalination systems exist, all of which are very energy-intensive. Freeze desalination is an alternative, but the salt removal efficiency in a single treatment step is insufficient. Therefore, several steps are necessary, making the process uneconomical with current technology. The new system aims to reduce the salt content of the product water below the WHO limit of 0.1% with low energy consumption and in a single freezing step. The desalination system for saline solutions is characterized by the freezing of low-salt ice onto hollow bodies filled with a phase-change cold storage substance. Essentially, the freezing process utilizes the enthalpy of fusion of the cold storage substance. After separating the ice-laden hollow body from the remaining salt-enriched solution, the low-salt ice is melted. This process can achieve a salt removal efficiency of up to 98.8% in a single cycle. Freeze desalination system.

The invention discloses a salinity-adaptive seawater alkalization synergistic method, and belongs to the field of ocean engineering and environmental protection. According to the seawater alkalization engineering alkalinity monitoring and control scheme based on water body treatment flow rate adjustment, an adaptive alkaline material is selected according to the salinity gradient of a treated water body, the target alkalinity of effluent is accurately set based on the salinity of inlet water, and the water body alkalinity is monitored in real time and compared with the target alkalinity; the alkalization effect is accurately controlled by dynamically adjusting the flow velocity of the treated water body. Aiming at water bodies with different salinity (low salinity lt, 0.5%, medium salinity of 0.5-25%, and high salinity gt, 25%), a differentiated alkalinity improvement target and an alkaline material formula are adopted. The system optimizes the residence time of the water body in the reaction kettle through an iterative decrement flow rate control strategy, and improves the alkalization efficiency. According to the method, the artificial storage increment of the atmospheric CO2 in the seawater alkalization process can be accurately calculated, an efficient and controllable technical scheme is provided for ocean negative emission engineering, and the method has important significance in relieving global climate change.

The application discloses a method for marking up sea bass fry in a low-salinity pond, which comprises the following steps: cleaning the bottom of the pond, removing sundries and pond bottom water, and then adding water to an appropriate water depth; performing early-stage regulation and treatment on the water quality of the pond before fry is added, wherein the pH of the water body is between 7.8 and 8.3, ammonia nitrogen is 0, nitrite is less than or equal to 0.10, dissolved oxygen is greater than or equal to 7.5 at a water depth of 1 m under the condition that an oxygenator is fully opened, salinity is less than or equal to 7 ppt, water temperature is greater than or equal to 15 DEG C, total alkalinity is 120-150 ppm, hardness is 800-1000 ppm, and transparency is 50 cm to 80 cm; after the fry is added, fish group health care is performed by using a spraying method in a feeding area, and the spraying formula is as follows: formula 1 (100 g of 98% feed-grade Vc, 850 g of glucose and 50 g of 0.3% St. John's wort extract), and formula 2 (100 g of 98% feed-grade Vc, 820 g of glucose and 80 g of hawthorn (200 mesh ultrafine grinding)). By using the method, the survival rate and growth speed of sea bass fry in a low-salinity pond can be improved without changing the current production basic elements and process, so that the sea bass fry basically reaches or exceeds the average marked fry level in the Bajiao sea bass dominant production area in Zhuhai, Guangdong.

The application provides a kind of artificial wetland water circulation saline-alkali soil leaching and breeding system and its operating method, including the farmland soil leaching unit, leaching liquid processing unit and reed-fish-crab breeding unit connected in turn.The leaching inlet channel of farmland soil leaching unit inputs farmland leaching freshwater, and the soil salinity is reduced by using the circulating water level leaching method, and the high salinity soil leaching liquid is collected and input into the leaching liquid processing unit through the leaching drainage channel, and the salt reduction treatment is carried out by flowing through the salt reduction plant planting area, and the obtained low salinity effluent is used as the breeding water in the reed-fish-crab breeding unit.The final effluent of the breeding unit is used as the source of farmland leaching water or irrigation water, and the sediment is used as farmland fertilizer, realizing the recycling of water resources and the reuse of internal resources of the system, and the plant bodies, fish and crabs finally harvested by the system can be used as economic output, so that the system becomes a new type of ecological agricultural system considering saline-alkali soil treatment and resource recycling.

This invention relates to genetically improved Eastern oyster (Crassostrea virginica) lines developed by the Morgan State University Patuxent Environmental and Aquatic Research Laboratory. Derived from Maryland wild populations, these diploid, triploid, and tetraploid lines exhibit enhanced tolerance to low salinity, rapid growth, and disease resistance. Genetic improvement was achieved through multiple approaches including phenotype-based, genomic, and marker-assisted selection. Several diploid low-salinity-tolerant lines (LS2019, LS2025, LS H-GEBV) and a fast-growing line (FG H-GEBV) have been produced and are undergoing field evaluation, while MSX-resistant lines are under development through field challenge testing. Multi-trait genomic selection enables integration of growth, salinity tolerance, and disease resistance into single lines based on trait correlations and production needs. Triploid lines (3nD-20, 3nE-20, 3 nF-20, 3nW-25) generated by chemical induction are used to create tetraploids, ultimately producing superior commercial triploid seed. These distinct oyster lines improve aquaculture productivity and restoration success in low-salinity Chesapeake Bay environments.

The application firstly adopts selection breeding technology combined with ploidy breeding technology to construct and cultivate long oyster tetraploid population and Fujian oyster tetraploid population which are genetically stable, fast in growth speed and high in survival rate; constructs hybrid oyster tetraploid population (GGAA) through hybridization of long oyster tetraploid and Fujian oyster tetraploid; hybridizes near Jiang oyster diploid breeding population as a female parent and GGAA as a male parent to obtain "near Jiang oyster-long oyster-Fujian oyster" three-way hybrid triploid oyster (RGA). The cultivated three-way hybrid triploid oyster can keep fast growth, high survival rate and high stress resistance under the condition of low salt sea area (<20), and at the same time, shows a relatively high proportion of infertile individuals in the breeding season. The application is suitable for large-scale preparation of three-way hybrid triploid oyster seedlings, provides matching breeding technology of three-way hybrid triploid oyster suitable for estuary, gulf and other medium and low salinity breeding sea areas of oyster industry, and has good industrial application value.