| 摘要 |
PURPOSE: A spin-dry using a vacuum tank and a dredging method including a precipitate are provided to be able to stabilize dredged sediment, drop discharged dredged sediment steadily, and easily treat by natural falling and precipitating inputted dredged sediment. CONSTITUTION: A dredging method comprises the following steps: preparing dredged sediment by using a dredging apparatus of dredged deposit of a sewer; inflowing dredged sediment to the vacuum tank through a suction hose from the sewer connected with a side of the dredging apparatus; stabilizing a discharging semi-solid from the dredged sediment to the lower part by discharging liquid of the dredged sediment inputted from the suction hose through a vacuum tank mounted with multiple vacuum pumps which is connected with the suction hose; and ejecting spin-dried dredged sediment to the outside by spin-drying the ejected semi-solid dredged sediment. [Reference numerals] (AA) Start; (BB) End; (S10) Dredging step; (S30) Dredged sediment discharging step; (S50) Dredged sediment stabilizing step; (S70) Dredged sediment treating step |
