Printech Archive, February, 2000
Re: Wastewater Treatment of Blanket Wash

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Date: Thu Feb 24 2000 - 16:21:42 CST

This is in response to our inquiry regarding wastewater treatment options for
blanket wash. It is not apparent from your email if the blanket wash was
diluted with water prior to cleaning or where the discharge is going (e.g.,
POTW, septic system, or direct discharge). Nevertheless, blanket wash is
generally not considered an acceptable discharge for a direct discharge
situation or to a POTW and shouldn't ever be discharged to a septic system.

>From your description of the washes being used, the Bl-3 wash with fatty
esters can also pose an additional problem because fats, oils, and greases
are prohibited discharges because they have a tendency to clog up the sewer
lines. None of your information provides flashpoint information, but
flammable washes are also prohibited from discharge as well.

I am not aware of any off-the-shelf treatment systems that could be used for
these wastes. Any system would have to be able to break down the organics. A
UV/Peroxide oxidation system might be a good approach, but the costs
associated with purchasing and labor to run it would probably outweigh the
costs of proper disposal. Also, installation of a pretreatment system could
trigger permitting from the state, POTW, and require certification for the
wastewater operator. You need to check the regulations.

I hope this helps, let me know.

Gary Jones
Graphic Arts Technical Foundation
200 Deer Run Road
Sewickley, PA 15143
412/741-6860 x608 - Phone
412/741-2311 - Fax

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