Cleaner Technology Transfer to the Polish Textile ... - Miljøstyrelsen

Phase 3d While Phase 1 and 2 are directed towards reduction of both water and chemical
consumption, the membrane filtration is directed towards reduction of the
remaining water and energy consumption. The membrane filter separates the
rinsing water in water, which can be re-used and in a concentrate which contains
the same amount of dry matter, only more concentrated. The dry matter
will not be degraded or eliminated during membrane filtration.
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The project does include only limited resources for investigating the possibilities
for disposal of this concentrate.
When the projects were elaborated, it was known that the concentrate of dyestuff
used could be digested biologically in an anaerobic digester. Such a
digester was under establishment at the municipal waste-water treatment plant
in Lodz. In order not to depend solely on this solution, we investigate the possibility
of using the so called »Advanced Oxidation Process« (AOP), which is
based on the use of combination of ozone, hydrogen peroxide and UV-light, to
oxidize the waste material partially or completely. In literature we find good
results with partial destruction of the exhausted dye-stuff, before the water is
led to an aerobic biological treatment plant.
Phase 4 The results will be included in a total evaluation, along with a technical-financial
calculation of the consequences of installing a membrane filter plant with
necessary auxiliary equipment for re-use of rinsing water from the dyeing processes.
This phase is expected to be finished during December 1996 and it
should then be decided if Phase 7: Full-scale Membrane Plant should be
implemented.
According to the project agreement with Teofilów, the dye-house is obliged to
finance half of the membrane plant (limited by a maximum amount however),
if the result of the report will be that the plant is profitable.
Phase 5 The results have been presented to the Polish textile dyeing-houses at a demonstration
seminar, which was held at the Teofilów factory on 22-23 January,
1997. At this seminar, the pilot plant was demonstrated in operation.