Samsung Engineering has filed a patent for a method and apparatus for reusing wastewater. The method involves multiple purification steps, including passing wastewater through a flocculation-sedimentation unit, a membrane bioreactor, and a reverse-osmosis membrane unit. The effluent can be reused as cooling or industrial water. GlobalData’s report on Samsung Engineering gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Samsung Engineering, AI assisted CAD was a key innovation area identified from patents. Samsung Engineering's grant share as of January 2024 was 59%. Grant share is based on the ratio of number of grants to total number of patents.

Method for reusing wastewater in semiconductor manufacturing processes

Source: United States Patent and Trademark Office (USPTO). Credit: Samsung Engineering Co Ltd

A patent application (Publication Number: US20240034658A1) outlines a method for reusing wastewater in a semiconductor or display manufacturing process. The method involves mixing different types of wastewater, purifying it through various stages including flocculation-sedimentation, membrane bioreactor, and reverse-osmosis membrane units, and reusing the treated water as cooling or industrial water. The process includes specific pH ranges and chemical introductions at different stages to ensure effective purification. Additionally, the method includes steps for cleaning the reverse-osmosis membrane and introducing disinfectants and anti-scaling agents as needed.

Furthermore, the patent application describes an apparatus for implementing the wastewater reuse method. The apparatus includes multiple reactors for flocculation, sedimentation, denitrification, and nitrification, as well as tanks for separation and reverse osmosis. Specific chemicals are introduced at different stages to facilitate the purification process, and the apparatus includes components such as mixers and return lines for efficient operation. The reverse-osmosis membrane unit is specified to use either a brackish water or seawater reverse-osmosis membrane, depending on the application. Overall, the apparatus is designed to effectively treat mixed wastewater from semiconductor or display manufacturing processes, ensuring the reuse of water resources while maintaining high purification standards.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.