Biological purifier for untreated waste water and method of producing the same, biological purification method for untreated waste water, and biological purification system for untreated waste water
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United States of America Patent
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Sep 12, 2017
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app pub date -
Jul 24, 2014
filing date -
Aug 30, 2013
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Abstract
Provided is a biological purifier, by which metal ions in untreated waste water containing the metal ions and sulfate ions can be removed in a low temperature environment with a water temperature of 15° C. or less for a long period of time. The biological purifier for untreated waste water containing metal ions and sulfate ions used for removing the metal ions from the untreated waste water by precipitating sulfides of the metal ions, the biological purifier includes chaff retaining sulfate-reducing bacteria; and an organic-containing material containing 5 mass % or more of crude protein.
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