Liquid purification or separation – Recirculation – Serially connected distinct treating or storage units
Patent
1999-08-31
2000-09-12
Lithgow, Thomas M.
Liquid purification or separation
Recirculation
Serially connected distinct treating or storage units
210196, 21032165, 430398, 430399, 430400, B01D 6300, B01D 6158, G03C 5395
Patent
active
061173150
ABSTRACT:
The invention relates to a process and apparatus for the treatment of photographic films. The film circulates in a series of processing baths, each of these baths comprising a washing area each comprising one or more tanks, the waste water from all the washing areas is recovered and treated in a single nanofiltration device, common to all the processing baths, the water hardness of the permeate from the nanofiltration device is adjusted, and the permeate is recycled to each of the washing areas of each of the processing baths.
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MLSchreiber "Present Status of Silver Recovery in Motion Picture Laboratoris" JR of the SMPTE, vol. 74, Jun. 1965, pp. 505-513.
Eastman Kodak Company
Lithgow Thomas M.
Tucker J. Lanny
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