Apparatus and method for treating FGD blowdown or similar liquids

  • US 7,790,034 B2
  • Filed: 07/24/2006
  • Issued: 09/07/2010
  • Est. Priority Date: 07/25/2005
  • Status: Active Grant
First Claim
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1. A process for treating a waste stream comprising flue gas desulfurization blow down water having steps of physical and chemical pretreatment to remove suspended solids from the waste stream and soften the waste stream followed by treatment to denitrify the waste stream followed by treatment to remove selenium from the waste stream, wherein the steps of denitrifying the waste stream and removing selenium from the waste stream occur in one or more fixed film bioreactors.

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