Treatment of Bleach Plant Effluents By Membrane Filtration, 1992 Environmental Conference Proceedings

Membrane filtration is one possible method for the removal of stable substances, toxic substances and/or substances with a bioaccumulation potential.

In batch-wise laboratory experiments we have studied ultrafiltration, nanofiltration and reverse osmosis filtration of different effluents from the bleach plants sequence of various Kraft mills.

The ultrafiltration of the total bleach effluent showed COD and AOX removal of about 60 %. When using reverse osmosis as a polishing step we got a removal of COD >90 % and higher than 99 % for organochlorine substances.

During a 35-day experiment the average flux was 48 l/m^2.h for the tubular RO membrane and 29 l/m^2.h for the spiral wounded membranes. The retention was a bit better for the tubular membranes. The removal of phenolic substances, fatty acids etc was also high.

Author: Ekengren, O., Bjurhem, J.E., Filipsson, S.
Treatment of Bleach Plant Effluents By Membrane Filtration,
Treatment of Bleach Plant Effluents By Membrane Filtration, 1992 Environmental Conference Proceedings
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