WASTE WATER TREATMENT PROCESS Russian patent published in 2004 - IPC

Abstract RU 2228302 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 neutral waste formaldehyde-containing water is added urea at its molar ratio to formaldehyde 1.0:(1.3-1.5) and resulting mixture is exposed to contact, during 10-15 min, with porous acid sorbent used in amount 30-35 g/l. 99.98% of formaldehyde is thus removed. EFFECT: increased formaldehyde removal degree and intensified process. 4 tbl, 4 ex

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RU 2 228 302 C1

Authors

Pashajan A.A.

Shchetinskaja O.S.

Lukashov S.V.

Gamazin V.P.

Dates

2004-05-10—Published

2002-10-17—Filed