Process for water treatment by flocculation
AssigneeRhone-Poulenc Industries
InventorsFrancois Meiller, Yannick Le Du
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Abstract
A water treatment process is provided wherein water of a pH in the range of about 6 to 9 is treated with a flocculating agent, most preferably, an iron or aluminum comprising flocculating agent, and a flocculation additive comprising a heteropolysaccharide generated by the action of bacteria of the genus Xanthomonas or Arthrobacter, or fungi of the genus Sclerotium. The flocculating agent is added initially to the water, with the heteropolysaccharide comprising flocculation additive being added subsequent thereto. The process finds particular utility in the purification of potable waters.
Claims26
A process for the treatment of water comprising sequentially adding to water having a pH in the range of about 6 to about 9 first (i) an iron-containing or aluminum-containing flocculating agent, and then (ii) a flocculation additive comprising a heteropolysaccharide obtained by the fermentation of a carbohydrate via the action of bacteria of the genus Xanthomonas or Arthrobacter, or fungi of the genus Sclerotium.
Dependencies are inferred from the claim text.