PRODUCTION METHOD AND PRODUCTION DEVICE FOR WATER FOR PURE WATER, AND PRODUCTION METHOD AND PRODUCTION SYSTEM FOR PURE WATER
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United States of America
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Mar 20, 2025
app pub date -
Aug 30, 2024
filing date -
Aug 30, 2024
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Abstract
A production method for water for pure water includes adding polyaluminum chloride to raw water to produce first treated water, and filtering the first treated water in two or more stages including filtering with a filtration membrane device in a preceding stage to produce first concentrated water, and filtering the first concentrated water with a filtration membrane device in a subsequent stage. The water for pure water is produced as permeated water produced by the filtering in the two or more stages.
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