| 摘要 |
A ballast water treatment system 14 defines a flow path 20 having an inlet 16 for receiving ballast water and an outlet 18 for discharging ballast water. An ultraviolet (UV) reactor 24, having one or more UV lamp(s) 40, is arranged in the flow path so that ballast water is exposed to UV radiation when flowing through the UV reactor. The UV reactor is configured to induce helical flow of the ballast water around the, or each, UV lamp. A sampling system 30, upstream of the UV reactor and downstream of a filter 22, is configured to divert a sample of ballast water from the flow path to a UV transmittance sensor 32. A controller (28, Fig. 3) sets and adjusts the power of the UV lamp(s) in relation to a signal from the UV transmittance sensor. A flow control valve 38 is arranged between the sampling system and the UV reactor, wherein the controller is configured to communicate with the valve to control the flow rate of ballast water en route to the UV reactor in relation to a signal from the UV transmittance sensor. |
