Method and apparatus for processing biologically hardly degradable waste water capable of reducing ozone

U.S. Patent Number: 6402966

Abstract: In a method for processing a biologically hardly degradable waste water including benzene ring materials, the waste water is oxidized by using ozone to produce oxalic acid. Then, the oxalic acid is reacted using a chemical reaction to produce oxalate. Finally, the oxalate is separated out from the waste water.

Inventors: Taira; Tsutomu (Tokyo, JP)

Assignee: NEC Corporation (Tokyo, JP)

Application Number: 09/709,183

Issued: 2002-06-11

Expired: 2006-06-11

Classes: 210/760 ; 210/765; 210/766; 210/908; 210/909

Field of search: 210/758,760,765,766,908,909

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