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printech, November, 2000
Re: wet scrubbing


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From:Dave Salman(Salman.Dave@epamail.epa.gov)
Date:Thu, 30 Nov 2000 07:18:41 -0500


Ethanol or ethyl acetate - no. Dimethylformamide (DMF) - yes. I am aware of a company with a very specialized rotogravure printing operation that uses DMF as its major solvent and uses a wet scrubber (at at least one and perhaps more than one facility) to remove DMF from the dryer exhaust. The DMF laden scrubber water goes through the facilitiy's waste water treatment system where the DMF is broken down by the bugs (bacteria) in the system. Perhaps an option for ethanol or ethyl acetate would be to trickle the scrubber water through a biofilter. Dave Salman Coatings and Consumer Products Group US EPA OAQPS (Mail Drop 13) RTP NC 27711 tel (919) 541-0859 fax (919) 541-5689 e-mail salman.dave@epa.gov



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