Removal of Formaldehyde from Acrylic Acid Production Wastewater

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Environmental Engineering Science, ISSN: 1092-8758, Vol: 20, Issue: 6, Page: 703-707

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Bednařík, Vratislav; Vondruška, Milan
Mary Ann Liebert, Inc.
Environmental Science; odpadní voda z výroby kyseliny akrylové; formaldehyd; chemické čištění; močovino-formaldehydová pryskyřice; wastewater from acrylic acid production; formaldehyde; urea; chemical treatment; urea-formaldehyde resin
article description
Wastewater from production of acrylic acid through catalytic oxidation of propylene exhibits a high formaldehyde content (approx. 12-14 g/L), which renders direct biological treatment of this water difficult. This paper introduces a procedure for formaldehyde removal from this wastewater employing chemical treatment consisting in adding urea to wastewater with following removal of formed solid-reaction product by filtration or centrifugation. The efficiency of formaldehyde removal through this procedure is about 99.5%, thus markedly reducing toxicity and inhibitory effect of the wastewater on activated sludge. The reaction product, which is urea-formaldehyde resin, is a technically utilizable potential material.