There is provided a ballast water treatment system and method that allows ballast water which is to be purified to receive a prescribed dose of ultraviolet rays even when the ballast water varies in transmittance. A ballast water treatment system (10) includes an ultraviolet irradiation device (23) which irradiates ballast water flowing through a treatment line (a pipe (34, 36)) with ultraviolet rays, and a control unit (100). The ultraviolet irradiation device (23) includes a light source which emits ultraviolet rays, and an illuminance sensor sensing an illuminance of ultraviolet rays received by the ballast water. The control unit (100) controls the ultraviolet irradiation device (23) to maintain at a prescribed dose a dose calculated using an illuminance (I) sensed by the illuminance sensor and a flow rate of ballast water which flows through the ultraviolet irradiation device (23). When the sensed dose cannot be maintained at the prescribed dose by controlling the ultraviolet irradiation device (23), the control unit (100) reduces a treatment flow rate of the ballast water which flows through the treatment line.
BALLAST WATER TREATMENT SYSTEM AND BALLAST WATER TREATMENT METHOD
BALLASTWASSERBEHANDLUNGSSYSTEM UND BALLASTWASSERBEHANDLUNGSVERFAHREN
SYSTÈME DE TRAITEMENT D'EAUX DE BALLAST ET PROCÉDÉ DE TRAITEMENT D'EAUX DE BALLAST
2018-02-14
Patent
Electronic Resource
English
IPC: | C02F Behandlung von Wasser, Schmutzwasser, Abwasser oder von Abwasserschlamm , TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE / B01D SEPARATION , Trennen / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / B63J Hilfsanlagen auf Schiffen , AUXILIARIES ON VESSELS |
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