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RE: Wastewater recycling

Extra idea - the spent plastic bead waste may be recyclable, whether
hazardous waste or not.  A contact is US Technology Corp, John Socotch:
330-455-1181 phone
330-455-1191 fax
Also, Have you tried this site for vendor/technology sources for stills,
wastewater treatment/recycling systems or any other equipment?
And, how is the mineral spirits applied?  Might a recirculating, filtering
enclosed parts cleaner work?  You can find units that are hooked to a still
where when the solvent is spent, it is sent directly to the still and
returned fresh to the washer, all in an automated, closed-loop system.  You
do not even have to count the spent solvent as haz waste since there is no
external accumulation before distillation.  You may be able to hook up a
still in this fasion if they already have a parts washer.

	-----Original Message----- 
	From: owner-p2tech@great-lakes.net on behalf of Wielkens, Donatus 
	Sent: Thu 12/16/2004 4:03 PM 
	To: p2tech@great-lakes.net 
	Subject: Wastewater recycling
	Replace wastewater evaporation (burn-off) with water recycling and
	            Any suggestions?
	We are working with a facility doing remanufacturing of a particular
automotive part (size: 2 quarts or larger) in substantial quantities.
	Exteriors of received cores are cleaned to remove grease and grime in
high pressure washers and rock tumblers using an aqueous biodegradable
industrial detergent from ChemStation. Plastic media blasting is used to
remove paint, if necessary.
	The cleaned units are dismantled, their internal components cleaned
with the ChemStation industrial detergent in wash tanks and/or ultrasonic
	All aqueous waste streams are evaporated in a Burn-Off oven.  Oven is
propane heated.  Wastewater is transferred from the different stations in
55-gallon drums to the 80-gallon oven tank.  Not a large waste stream
(approx. 55-110 gallons per day, depending on one or two shifts); around
10,000 gallons of water a year is evaporated requiring 7,180 lbs of propane.
	Batch evaporation takes about six hours.  The powdered oven residue
is disposed off.
	We are looking into a recycling system for this wastewater, including
the air compressors' blow back oily water, to replace the water burn-off.
Further, these 10,000 gallons may increase with an additional 600 gallons of
wastewater a month when another activity will be put into operation early
next year.  Quality and quantity of that particular wastewater stream is an
unknown at this time.  Contaminant here would be a resin type compound.
Closed-loop recycling is not immediately seen as feasible with the current
facility's cleaning setup (with or without the new activity).
	Second topic:
	While we are at it, mineral spirits are being used to clean special
bearings.  1000 gallons a year.  They say all the aqueous cleaners tested so
far were without success.
	* Clearers that worked for you?
	* Vendors of solvent stills?
	Happy Holidays!
	Don Wielkens
	Retired Engineer
	Pollution Prevention Program
	Florida Department of Environmental Protection
	2600 Blair Stone Road, MS 4570
	Tallahassee, FL 32399-2400
	Home: (813) 908 9170

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