| 摘要 |
A pump comprises two discrete series (13, 15) of pumping stages, the first having a lower liquid output than the second. The liquid is recirculated from a processing enclosure (5), in particular using reverse osmosis, nanofiltration or the like, to the second series (15) of processing stages where it is mixed with liquid from the first series (13) of stages, whereafter the resulting mixture is conveyed to the processing enclosure (5). With this high-output system, no second pump is required. |
