| 摘要 |
PROBLEM TO BE SOLVED: To provide a sewage treatment device which directly purifies sewage exclusively comprising domestic water, such as night soil, and first performs preliminary initial filtration/purification treatment of the sewage, and performs the refiltration/purification of separated initial solid after the above initial purification treatment by a screw press for filtration which can be dismantled and washed by using a water head pressure generated by making a part of purified water fall. SOLUTION: The sewage treatment device comprises an initial solid-liquid separation means A which preliminarily filters and eliminates solid, such as impurities, in the flowing state of the sewage, and a main solid-liquid separation means which can separate the initial solid separated by the initial solid-liquid separation means A into the final solid residue and purified liquid by washing and compressing and discharge them, by making a part of the separated filtered purified water fall to obtain the desired water head pressure and introducing it to the initial solid introduced into the screw press 14 for filtration having an outer cylinder with bored filtration pores and a discharge port at the tip end. COPYRIGHT: (C)2006,JPO&NCIPI
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