WASTE WATER TREATMENT PROCESS Russian patent published in 2004 - IPC

Abstract RU 2228303 C1

FIELD: waste water treatment. SUBSTANCE: invention relates to methods of treating formaldehyde-containing waste waters and can be used at woodworking industry enterprises. To waste formaldehyde-containing water at pH 1.5-2.0 is added urea at its molar ratio to formaldehyde 1.0:(1.3-1.5), mixture is aged for 3.5-4.5 h, resulting resin is separated by filtration, and filtrate is passed through acid porous sorbent at velocity 0.5-1.0 cu. m/h. EFFECT: increased formaldehyde removal degree and reduced treatment time and reagent expenses. 3 tbl, 3 ex

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RU 2 228 303 C1

Authors

Pashajan A.A.

Gamazin V.P.

Lukashov S.V.

Dates

2004-05-10—Published

2002-10-17—Filed