| 摘要 |
The present invention concerns an arrangement to increase the concentration of solid, dissolved substances in a solution, e.g. to dewater digested sludge (8, 32) from a sewage treatment plant. The digested sludge (8, 32) is received on a membrane (11, 28), which membrane (11, 28) is kept moistened. The membrane (11, 28) is moveable and in one part of its movement there is an air layer on the side of the membrane (11, 28) not receiving the sludge (8, 32). The membrane (11, 28) lets water from the digested sludge (8, 32) through the membrane (8, 32), while solid, dissolved substances of the sludge (, 32) will not pass. The water falling out of the membrane (11, 28) is collected and feed out through an outlet (3, 22). Also the dewatered sludge is feed out through an outlet (4, 19). |
