| 摘要 |
A vacuum drainage system for sanitary equipment such as toilets, urinals and sinks etc., comprising branching pipes connected to the sanitary equipment and ending in a collecting pipe (5), and a vacuum device (2) connected to the collecting pipe (5) producing vacuum in the pipes and transporting sewer from the sanitary equipment to e.g. a collection tank (1) or purification plant. The vacuum device comprises one or optionally several screw pumps (2) being equipped with a mill or grinding device for grinding solid particles in the sewer and being connected directly to the collecting pipe (5).
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