| 摘要 |
An aqueous slurry containing dissolved solids and a high concentration of suspended solids is positioned as a mat (3) between a pair of porous endless belts (2, 4) to provide a composite structure which is then moved through a treating zone (6) and subjected to alternate stages of compression and relaxation. The compression and relaxation are achieved by passsing the composite structure over a series of spaced rolls (7-12). A liquid stream (2 4) containing a high concentration of dissolved solid is cascaded over the mat in a countercurrent fashion so that the dissolved solids of the liquid stream a re dissolved in the aqueous phase of the mat when the mat is subject to relaxation. The mat containing the increased concentration of dissolved soli ds and suspended solids is then compacted and the solid residue (39) is landfilled. The liquid stream (31) being discharged from the treating zone a nd containing a depleted concentration of dissolved solids is recirculated for use in a pulp/papermaking operation.
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