36 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.

Processes for determining formation salinity and / or processes for identifying oil bearing and / or water bearing zones in freshwater or relatively low salinity formations. In some embodiments, the process for determining formation water salinity can include measuring resistivity of a formation fluid sample at a first temperature (T1) and at a second temperature (T2), where T1 and T2 can be separated by a temperature difference (ΔT). The process can also include calculating a resistivity factor value based on the resistivities measured at T1 and T2. The process can also include determining a salinity of the formation fluid sample based on the resistivity factor value and the ΔT. The process can also include initiating a downhole operation using the determined salinity of the formation fluid sample.

Described is a system for targeted waterflooding in an oil field. The system includes a mobile reverse osmosis unit connected with source water. The mobile reverse osmosis unit generates low salinity fresh water from the source water. An injection manifold is connected with the mobile reverse osmosis unit. The injection manifold distributes the low salinity fresh water into injection wells within the oil field. The low salinity fresh water is stored underground prior to its use in production wells.

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.

The invention provides a coal-fired power plant high-low brine advanced treatment and recycling system and method. The system 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 box 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. The backwashing water and the low-salt water are filtered by the iron and manganese removal filter and then are directly recycled to a desulfurization system. And the mixed bed regeneration wastewater high-salinity water is discharged and treated by seawater reverse osmosis, so that recycling is achieved.

Systems and methods for treating and recycling wastewater using a semi-closed loop salinity gradient energy harvesting system. The system includes a low salinity water stream and a high salinity water stream pumped through a salinity energy harvesting system, which produces a mixed water exit stream pumped through a separator system, producing a high salinity water exit stream and a pure water stream. The method includes pumping a low salinity water stream and a high salinity water stream to a salinity energy harvesting system, operating the salinity energy harvesting system to produce a mixed water exit stream and a produced energy, pumping the mixed water exit stream to a separator system, separating dissolved salts from the mixed water exit stream, and producing a high salinity water exit stream and a pure water stream. The separator system operates using the produced energy from the salinity energy harvesting system.

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.

To provide an evaluation apparatus and an evaluation method capable of accurately evaluating whether or not a crude oil recovery effect due to chemical osmosis in a low-salinity water flooding method can be obtained.SOLUTION: An evaluation apparatus 100 includes: an effective osmotic pressure ▵P measuring device 10; a device that calculates a crude oil movement amount ▵V on the basis of a measurement result selected from among a measurement result of calculating the ratio of crude oil amount and water amount in a test body per unit time, a measurement result of the crude oil amount exuded from the test body in contact with low-salinity water, and a measurement result of the mass difference of the test body before and after contact of the test body with low-salinity water; and an evaluation device 30 that determines that a crude oil recovery effect is present when a condition selected from among the effective osmotic pressure ▵P is greater than 0 and the effective osmotic pressure ▵P changes per unit time and no crude oil movement amount ▵V is confirmed, the effective osmotic pressure ▵P is greater than 0 and the effective osmotic pressure ▵P changes per unit time and the crude oil movement amount ▵V is confirmed, and the effective osmotic pressure ▵P is 0 and the crude oil movement amount ▵V is confirmed, is satisfied.SELECTED DRAWING: Figure 1

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.

An environmentally friendly ship propulsion system and a method for propelling a ship. The ship propulsion system comprises an osmosis chamber (1), a pressure relief unit (2) and a desalination unit, the osmosis chamber (1) comprising a high salinity region (11) and a low salinity region (12) separated from one another by an osmotic membrane (13). The pressure relief unit (2) having at least one pressure-motion converter connected to the high-salinity region (11) of the osmosis chamber (1) via high-pressure line (21). The desalination unit is suitable for producing salt or at least high-salinity water and fresh water or at least low-salinity water. A fresh water pipe connecting the desalination unit with the low salinity area (12) of the osmosis chamber (1) and a salt water supply (14) is controllably connected to the high salinity area (11) of the osmosis chamber (1). (FIG. 1a)

The utility model provides a water quality PH value monitoring system. The water quality PH value monitoring system comprises a water body sampling unit, a classification detection unit, a PH value detection unit and a control transmission unit, the water body sampling unit is used for acquiring a detection sample from a target water body, and the classification detection unit is used for detecting the salinity of the detection sample in the water body sampling unit and outputting a salinity detection result to the control transmission unit; the control transmission unit controls the water body sampling unit to classify the detection samples according to the salinity detection result; the PH value detection unit is used for detecting the PH value of the classified detection sample and outputting the PH value to the control transmission unit, and the control transmission unit uploads a PH value detection result. By means of the system, the influence of salinity on the PH value sensor can be reduced, and the monitoring precision of the PH value of the water quality is improved.

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.

A side-stream is separated from an oil phase stream that is discharged from a crude oil separator in a gas-oil separation plant. The side-stream contains water and oil. At least a portion of the oil phase stream that is discharged from the crude oil separator in the gas-oil separation plant is flowed to a desalter in the gas-oil separation plant. An electric field is applied across the side-stream to coalesce aqueous droplets present in the side-stream to form an aqueous phase. The aqueous phase is separated from the oil of the side-stream. At least a portion of the aqueous phase is evaporated to form a wastewater phase and a vapor phase. At least a portion of the vapor phase is condensed to produce a wash water. The wash water is flowed to the desalter. The wash water can be referred to washing water or dilution water.

Described is a system for targeted waterflooding in an oil field. The system includes a mobile reverse osmosis unit connected with source water. The mobile reverse osmosis unit generates low salinity fresh water from the source water. An injection manifold is connected with the mobile reverse osmosis unit. The injection manifold distributes the low salinity fresh water into injection wells within the oil field. The low salinity fresh water is stored underground prior to its use in production wells.

The present invention relates to the field of marine engineering and energy equipment corrosion control, and discloses a high-activity aluminum-based sacrificial anode and its preparation method and application. The mass percentages of the components of the high-activity aluminum-based sacrificial anode are: Ga is 0.8%-2.0%, In is 0.5%-1.2%, Zn is 0.8%-1.2%, Sn is 0.5%-1.2%, and Al is the balance. During preparation, Al ingots, Zn ingots, Sn ingots and Ga-In intermediate alloy ingots are placed in the crucible of a vacuum induction furnace in sequence; smelting begins under argon protection, and gradually heats to 700-720°C; the smelting liquid is cast into a mold and cooled. The high-activity aluminum-based sacrificial anode of the present invention solves the problem of the performance incompatibility of conventional seawater sacrificial anodes in low-salinity seawater environments, has strong electrochemical activity, high capacitance and current efficiency, dissolves evenly, has no harmful components, is suitable for the electrochemical protection of steel facilities in low-salinity seawater environments such as tidal flats and estuaries, and achieves the purpose of corrosion control.

Described is a method for enhanced carbon dioxide (CO2) sequestration in geological formations. The method includes dissolving CO2 in a low salinity fluid to form a CO2-brine solution. The low salinity fluid includes sodium (Na+) ions and sulfate (SO42−) ions. The CO2-brine solution is injected into a geological formation, and the CO2 reacts with the geological formation to produce solid carbonate minerals for CO2 sequestration.

The invention discloses a silk / GO composite film, a preparation method thereof and application of the silk / GO composite film in a salinity gradient power generation device, and belongs to the technical field of functional films and preparation of the functional films. According to the invention, the problem of low salinity gradient power generation efficiency caused by limited ion transmission capability of the existing separation membrane for salinity gradient power generation is solved. Silk and graphene oxide are used as raw materials, and a polycarbonate film is used as a substrate to prepare the silk / GO composite film. According to the composite membrane, silk and graphene oxide are compounded to form a stable frame structure, so that the interface connection among nanoparticles is greatly improved, and the ion transmission behavior is also remarkably improved, so that the salinity gradient power generation device based on the seawater salinity gradient has relatively high power generation efficiency. The light source is coupled with a marine emergency rescue system, the advantages of energy of the seawater environment and the like are effectively utilized, and the prepared portable rescue lamp is expected to solve the key scientific and technical problems that marine rescue equipment is short in working time and cannot be self-powered.

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 invention discloses a novel pumped storage power station power generation combination system which comprises a pumped storage system and a power generation system, the pumped storage system comprises a drainage pipeline, a reservoir, a pumping pipeline, a third-stage reservoir, a second-stage reservoir and a first-stage reservoir, one end of the drainage pipeline is connected to the reservoir arranged on a mountain top, and the other end of the drainage pipeline is connected to a power station; the multiple water drainage pipelines and the multiple water pumping pipelines are arranged, the multi-stage reservoir is arranged at the adjacent mountain top, the power generation system comprises a generator set, an impeller, a connecting shaft and a transmission, a connecting pipe is arranged in the generator set, and one end of the connecting pipe is connected to seawater. According to the novel power generation combination system of the pumped storage power station, the condition that seawater at the valley is low in salinity is utilized, the valley is selected to pump water, a large amount of inexhaustible water sources can be obtained through little filtration, and the problem that no water can be pumped due to the lack of water for residents or dry and dry seasons in a traditional pumped storage power station is solved; guarantee is provided for pumped storage, and a water storage reservoir with extremely high requirements does not need to be built.

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 present disclosure relates to a method for converting high salinity brine into a non-toxic, CO2-absorbing cementitious aggregate composition and a lower salinity water component, each of which can be recovered to a sea water desalination facility, further processed to produce fresh water and / or added to a body of water, and local plant groups and animal groups are not damaged. The present disclosure provides a method comprising the steps of: (a) combining (i) high salinity brine, (ii) CO2, and (iii) natural pozzolana, artificial pozzolana, latent hydraulic material and / or recycled aggregate (RA) or carbonized recycled aggregate (CRA); and (b) allowing the combination obtained in step (a) to be continuously present under conditions sufficient to convert the combination into a cementitious aggregate composition and a salinity-reducing water component. In some cases, an activator is added to the combination, which may be any salt or hydroxide of sodium, lithium, or potassium and any alkali metal or alkaline earth metal ion, and including Mg (OH) 2, MgO, Ca (OH) 2, CaCO3, Al2 (SO4) 3, and / or CaO.

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.

The present application relates to the technical field of aquatic genetic breeding, and particularly relates to a breeding method and system for breeding a new low-salinity breeding line of Macrobrachium rosenbergii based on BLUP family selection. The present application sets up ion compensation paths and non-compensation paths in parallel salinity steps for the same family at a metamorphosis key window, obtains metamorphosis completion rate and recovery survival rate at each salinity, determines ion compensation critical salinity and non-compensation critical salinity, and constructs an ion compensation dependency coefficient. Environmental deviation is calculated in combination with water quality and pathogen and other environmental indexes, and records are weighted and gated, BLUP genetic evaluation is implemented based on weighted data, a selection index considering target salinity out-pool rate, non-compensation critical salinity and dependency coefficient is constructed, and a new line capable of being stably bred at a target low salinity and having low ion compensation dependency is obtained through iterative selection under inbreeding constraint, so that cost reduction and emission reduction and large-scale popularization are realized.

The invention discloses a method for increasing the fertilization rate of crassostrea hongkongensis. The method comprises the following steps: putting collected healthy crassostrea hongkongensis parents with full gonads in a low-salt sea area into a breeding pond, then gradually increasing the salinity in the breeding pond until the salinity is increased to 18-22 per thousand, feeding baits, and temporarily breeding for more than 2 weeks. According to the method, it is found that the fertilization rate of the crassostrea hongkongensis in the low-salinity sea area is greatly increased through gradient salt rising and temporary rearing for 2 weeks, sufficient supply of crassostrea hongkongensis fry resources can be guaranteed, and healthy and sustainable development of the crassostrea hongkongensis industry is promoted.

The present disclosure refers to a method for using drilling fluid in drilling operations in the presence of saline lithology, with the aim of optimizing drilling without damaging the caliper and thus improving well construction conditions. Additionally, the present disclosure relates to an undersaturated low salinity drilling fluid, thus showing a potential to reduce the risks of column clogging due to salt precipitation and casing clogging, as it improves cleaning conditions inside the well, as cuttings and possible salt-generated beds are solubilized. The aforementioned drilling fluid will be applied in the construction of wells with potential gains in the disciplines of drilling fluids, directional tools and casing and cementing.

The invention discloses a device and a method for obtaining fresh water and crystalline salt from an inland saline lake, the device comprises at least one separation device used for separating the inland saline lake into at least two sub-lakes which are communicated in sequence and distributed in a salinity gradient increasing mode, only water flows into the sub-lakes at the tail end of the salinity gradient and does not flow out of the sub-lakes; a water inlet of the one-way flow channel is formed in the lower portion of the separation device and makes contact with one side of the sub-lake with the low salinity, a water outlet of the one-way flow channel is formed in the upper portion of the separation device and makes contact with one side of the sub-lake with the high salinity, and lake water on the bottom layer of the sub-lake with the low salinity flows into the surface layer of the sub-lake with the high salinity through the one-way flow channel. The sub-lake located at the initial end of the salinity gradient is gradually converted into a freshwater lake, and the sub-lake located at the tail end of the salinity gradient is evaporated to generate crystallized salt and then is gradually converted into a salt lake. According to the device and the method provided by the invention, the inland salt water lake can be transformed into the freshwater lake under the condition of low energy consumption.

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.