From: Gary Jones (firstname.lastname@example.org )
Date: Tue, 26 Feb 2002 22:50:55
The quick answer to your question is that there I am not aware of any small commercially available treatment systems that can remove all contaminants you identified from fountain solution prior to discharge. There are several filtration approaches that can be used to remove the ink solids and paper debris. Some systems are available that provide "in-line" filtration and these systems will extend the life of fountain solution. There are some standalone systems that use membrane filtration that can be used to remove the smaller particle sizes.
To remove the miscible materials such as alcohol or alcohol substitutes, separating these materials from water could be difficult. It may be possible to separate them by using activated charcoal as the organics would be adsorbed from the wastestream prior to discharge.
The concentration of alcohol and alcohol substitutes can vary and depending upon the sewer authority, the amount in the waste fountain solution might be acceptable. Most printers in the US do not need to conduct any pretreatment on fountain solution prior to discharge. Depending upon the treatment method used by the POTW, the alcohol and alcohol substitute can usually be digested by the bacteria used in the treatment process.