In a treatment device for securing an oxidant concentration to kill organisms in ballast water for a long time, storage means (23) stores a relationship between an absorbance of the water and a dissolved organic carbon concentration thereof and another relationship between the dissolved concentration and a residual oxidant concentration required after a predetermined time from the oxidant supply, to kill organisms and to suppress their regrowth in the ballast. Calculation means (24) derives the required concentration corresponding to a raw water absorbance measured by a meter (21) by referring to the relationships and calculates a target oxidant supply amount using the required concentration. For the target, control means (25) controls an oxidant supply device (5).
BALLAST WATER TREATMENT DEVICE AND BALLAST WATER TREATMENT METHOD
BALLASTWASSERBEARBEITUNGSVORRICHTUNG UND BALLASTWASSERBEARBEITUNGSVERFAHREN
DISPOSITIF ET PROCÉDÉ DE TRAITEMENT D'EAUX DE BALLAST
25.12.2019
Patent
Elektronische Ressource
Englisch
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