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expecting to be converted into electronic-grade ammonia solution more than 30 thousand tons/year.\u003C/p>","\u003Cp>TSMC also integrated vendors’ skills and planned to convert industrial-grade ammonium sulfate product into an electronic-grade ammonia solution. Not only can this condition turn the product into high-valued product, but also achieve the circular economy.\u003C/p>\u003Cp>With the development of an advanced process of semiconductor, a large number of raw chemicals are also accompanied by a large amount of waste. This situation will result in the problems of limited choices of industrial-grade products. Therefore, TSMC holds the principle of cradle-to-cradle, which aims to turn the waste into the products and back to its original industry.\u003C/p>","\u003Cp>Taiwan Semiconductor Manufacturing Company (TSMC) endeavors to be a circular economy practitioner and fulfill the circular economy through the company’s actions.\u003C/p>\u003Cp>Meanwhile, TSMC also realized the goal of the environment was to be in harmony with technology. By Mechanical Vapor Recompression (MVR) system, ammonium sulfate wastewater converted into the industrial-grade ammonium sulfate products, which has been the priority business in the industry of semiconductor.\u003C/p>","\u003Cp>\u003Cstrong>From Ammonia Nitrogen Wastewater to Industrial-grade Ammonium Sulfate Products\u003C/strong>\u003C/p>\u003Cp>Recycled sulfuric acid waste was used as adsorbents and combined with ammonia nitrogen wastewater; creating ammonium sulfate wastewater. TSMC further improved the ammonium sulfate crystallization system by introducing MVR. Converting ammonium sulfate into valuable industrial-grade ammonium sulfate product, which could be used to produce leather products and dyeing materials for resale.\u003C/p>\u003Cp>\u003Cstrong>From Industrial-grade Ammonium Sulfate Product to Semiconductor-grade Raw Material\u003C/strong>\u003C/p>\u003Cp>By the high-gravity rotating packed bed, ammonium gas is vaporized from industrial-grade ammonium sulfate. Moreover, ammonia gas will be purified and compressed in the low-temperature distillation process. 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