| 摘要 |
PROBLEM TO BE SOLVED: To produce a novel flocculant having flocculation effect higher than that of a ferric polysulfate aqueous solution. SOLUTION: The flocculant contains ferric polysulfate and a polyamic organic polymeric flocculant and is manufactured by gradually adding a polyamic organic polymeric flocculant aqeous solution to a ferric polysulfate aqueous solution under stirring.
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