A system and method for minimizing new water use in the water circulation
system of a treatment plant in which the matter to be treated is purified
and/or disaggregated using water in a treatment step. The suspension
containing the remaining components is subjected to mechanical
purification and the mechanically purified suspension is separated into
two processing water streams. The first processing water stream is
supplied back into the treatment step and the second processing water
stream is subjected to a chemical-physical clarification. The
chemically-physically clarified processing water stream is separated into
two clarified water streams. The first clarified water stream is led into
one of the two processing water streams and/or into the suspension and the
second clarified water stream is subjected to a biological clarification.
The biologically clarified water stream, being a fresh water stream, is
led into one or two clarified water streams. The ratio of the processing
water streams to the clarified water streams has been predetermined
depending on the matter that is supplied to the treatment step and on the
type of mechanical purification and the type of chemical-physical
clarification used.
