| 摘要 |
PROBLEM TO BE SOLVED: To provide a sludge thickening apparatus including a vacuum function and a sludge thickening function, simple in configuration of piping, and easy in operation of a valve for opening or closing the piping. SOLUTION: The sludge thickening apparatus comprises: a tank 5 isolating a sludge tank 8 from a reaction tank 7 by a partition wall; a pump 22 for reducing or applying pressure in the reaction tank 7, a suction/pressurization switching valve 25 for communicating with or interrupting the pump 22 and the reaction tank 7; and a tank switching valve 45 communicating with a sludge suction pipe 51 for sucking raw sludge water in the sludge tank 8 and the sludge tank 8 or the reaction tank 7, or communicating with the sludge tank 8 and the reaction tank 7. Further, the apparatus comprises a drum screen 11 in the sludge tank 8; a path for sucking the raw sludge water from the sludge suction pipe 51 to the sludge tank 8 to separate a sludge content by the drum screen 11; and a path for sucking primary waste water separating the sludge content by this drum screen 11 from inside the sludge tank 8 to inside the reaction tank 7 by switching the tank switching valve 45, switching the suction/pressurization switching valve 25 and reducing pressure in the reaction tank 7 by the pump 22. COPYRIGHT: (C)2008,JPO&INPIT
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