| 摘要 |
PROBLEM TO BE SOLVED: To provide a ballast water treatment system comprising a plurality of ballast water treatment apparatuses, which can reduce cost of pressurizing means in backwash water feeding means for feeding backwash water to two kinds of backwash water jet nozzles.SOLUTION: A ballast water treatment system 100 comprises a plurality of ballast water treatment apparatuses 1 (1A, 1B) comprising: a filter for filtering inflow water W1 to be treated and allowing it to flow out to the outside as filtered water W2; first backwash water jet nozzles and second backwash water jet nozzles for jetting backwash water W2, W5 toward an outer peripheral surface of the filter; and backwash water feeding means 7 for selectively pressurizing the filtered water W2 flowing out from the filter during an operation of ballast water treatment or water W5 other than the filtered water as backwash water, and selectively feeding the pressurized water to the first backwash water jet nozzles or the second backwash water jet nozzles. A part or whole of the backwash water feeding means 7 is provided so as to be shared by the plurality of ballast water treatment apparatuses 1 (1A, 1B).SELECTED DRAWING: Figure 1 |
