[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

(Fwd) RE: (Fwd) Re: Reuse of Dewatered Ink Solids

Forwarded from Printech, administered by the Printers' National 
Environmental Assistance Center (PNEAC).

------- Forwarded Message Follows -------
From:          "Debra Kramer" <kramer@cmcusa.org>
To:            "'printech@great-lakes.net'" <printech@great-lakes.net>,
               "'Bonnie Pray'"
Subject:       RE: (Fwd) Re: Reuse of Dewatered Ink Solids
Date:          Thu, 31 Jul 1997 08:23:45 -0500
Reply-to:      printech@great-lakes.net

Working with an ink company to reuse the solids is a good idea, but I
would caution you and the ink company about waste regulations.  The
issue may be that the ink company would be considered a Treatment,
Storage, and Disposal Facility (TSDF) if they accept a waste material.
 The regulations are different from state to state depending on their
definition of recycling and how they enforce the regulations.  

Obviously, TSDF permitting is not a recommended option.  It is a very
costly and time consuming process.  An alternative is to fuel blend
the solids rather than send them to a land fill.  Although ink
pigments from w.b. ink have no BTU value they can combine them with
other materials and fuel blend them at places such as a cement kiln.


--- Debra Kramer Waste Management & Research Ctr. - IL DNR (PNEAC)
3333 W. Arthington Chicago, IL  60624 773/265-2036 773/265-8336 FAX
--- ---------- From: 	Wayne
Pferdehirt[SMTP:pferdehi@epd.engr.wisc.edu] Sent: 	Friday, July 25,
1997 11:40 AM To: 	printech@great-lakes.net Subject: 	(Fwd) Re: Reuse
of Dewatered Ink Solids

Do any Printech users have anything to add to this inquiry?  Post
response to Printech and I will forward.


------- Forwarded Message Follows -------
Date:          Tue, 22 Jul 1997 16:40:56 +0000
To:            pray@iams.org
From:          wjw5@psu.edu (Warren J. Weaver)
Subject:       Re: Reuse of Dewatered Ink Solids
Cc:            p2tech@great-lakes.net
Reply-to:      p2tech@great-lakes.net

Hi, Bonnie. I have a answer to your question. It means changing
treatment system technology however. I work with a company that makes
membrane filter based treatment systems. They have experience with
systems for flexographic washwater. By separating the particles and
large molecules from the small molecules (such as water) in a membrane
filter, the ink solids (pigment and resins) and some of the
co-solvents, anti-foaming agents, adhesion enhancers and other
additives are concentrated for reuse (we call it a recycle system, not
a treatment system). In the flexo newspaper industry, this has become
standard technology. The key is to reuse these ink components in the
black ink where the various colors, when mixed become very dark and
are "hidden" (they use a lot of black ink in the newspaper industry).
If your client does not use much black ink, you've still concentrated
valuable components (some ink pigments cost more than $6 per pound).
Perhaps your client's ink manufacturer would be interested in it. Or,
perhaps, there is another flexographic printer in the area that does
use a lot of black water based ink-the Louisville Courier does, the
Akron Beacon-Journal does, the Pittsburgh Post does among others.

I would be happy to talk to your client and put them in touch with the
recycle system's manufacturer. Call me or have your client call me.


Warren J. Weaver
227 W. Market St.
York, PA 17401

ph 717-848-6669
cell ph 717-873-9898
fax 717-854-0087
web site www.penntap.psu.edu/

At  4:44 PM 7/15/97 -0700, Bonnie Pray wrote:
>We are working with a plastics printing company that has flexographic printing operations.  They use all water-based inks.  Press cleanups are conducted with a water/soap solution.  The spent wash water is sent to a wastewater treatment system where it 
is coagulated using aluminum chloride solution.  Lime solution is also added to the wastewater to adjust pH.  The wastewater then goes through a plate and frame filter press where solids are removed.  My assumption is that most of the solids
consist of ink pigments.  Currently, these solids are landfilled. Does
anyone have suggestions to reduce or eliminate this waste stream? Can
the ink pigments be recovered?  FYI - we are already addressing their
product scheduling practices to reduce the number of press
changeovers, this should reduce the amount of wastewater to some
>Thanks for any input.
>Bonnie L. Pray
>Institute of Advanced Manufacturing Sciences
>Cincinnati, OH
>(513) 948-2015

Wayne P. Pferdehirt, P.E., AICP
U. of Wis., Solid & Hazardous Waste Education Center
610 Langdon Street, Room 529, Madison, WI  53703-1195
Phone:  608/265-2361     Fax:  608/262-6250

Wayne P. Pferdehirt, P.E., AICP
U. of Wis., Solid & Hazardous Waste Education Center
610 Langdon Street, Room 529, Madison, WI  53703-1195
Phone:  608/265-2361     Fax:  608/262-6250