4 results about "Freshwater resources" patented technology

The application discloses a wave-preventing and erosion-resisting revetment structure for coral reef filling foundation and a design method, and relates to the technical field of coral reef revetment engineering.The application integrates four functions of wave-preventing, erosion-resisting, rainwater collecting and photovoltaic power generation, aims to solve the problems of single function of the existing revetment, easy erosion of the foundation, lack of fresh water resources and power supply, etc.The revetment is provided with a ladder type slope and a concave sawtooth wave-stopping structure on the sea side, and a cutoff wall is arranged at the lower part and embedded in the reef flat foundation, so that the wave-preventing and foundation erosion can be effectively inhibited.The photovoltaic power generation assembly is integrated on the top surface of the revetment, and the rainwater storage bin is arranged inside, rainwater is efficiently collected into the bin through the inclined driving lane, and the in-situ collection of fresh water and the reduction of concrete material consumption are realized.The application realizes the integration of disaster prevention and reduction, clean energy supply and rainwater resource utilization, and guarantees the long-term safe and stable operation of the island reef engineering.

This invention discloses an undisturbed sand sample collection device and method for seabed freshwater resource exploration, relating to the field of sand sample collection. It includes a crane and a box-type sampler. A steel cable frame is installed on the crane, and a lifting steel cable is connected to the steel cable frame. A lifting frame is installed on the box-type sampler. It should be noted that in this invention, when the lifting steel cable lifts the box-type sampler out of the water, two transversely moving storage boxes approach each other to enclose and store the box-type sampler. This effectively avoids collisions between the box-type sampler and the ship hull or crane components, reducing the possibility of sediment spillage. Furthermore, by storing the box-type sampler, even if it is damaged, the sediment will be caught, preventing direct loss of the sample after it emerges from the water, ensuring the sample collection rate even under damaged conditions. In addition, the box-type sampler can be placed on a bearing pressure plate, allowing two rotating locking frames to rotate and lock the box-type sampler, further preventing shaking.

This invention discloses a Is PETase mutants and their application in the degradation of PET plastics. This invention addresses existing... Is The PETase mutant cannot tolerate high substrate (PET plastic) concentrations, thus providing a method to improve the degradation activity of PET plastic. Is PETase mutant. For the aforementioned Is The present invention also optimizes the reaction system of the PETase mutant, thereby providing a method for depolymerizing PET plastics. Using the mutants described in this invention, such as M16-G, the degradation of high-concentration (20%) PET plastics can be completed at a Tg temperature, and it can be used for the degradation and recycling of PET plastics under industrial conditions. Furthermore, the present invention... Is PETase mutants, such as M16-G, can tolerate seawater. Seawater can be used to prepare the reaction buffer required for its degradation of PET plastics, which helps to save freshwater resources and protect the environment.

The present invention relates to an intensive photoheterotrophic culture process in high salinity for crustaceans, specifically white shrimp Litopenaeus vannamei. The system allows for better production control by reducing water exchange and discharges into the environment, thus controlling the introduction of harmful agents (pathogens, toxins, predators) and enabling shrimp farming in extreme (desert) regions, where the salinity of the culture system increases significantly due to temperature, solar radiation, and winds, and where there is a lack of fresh water.