The discharge monitor helps protect the environment from unwanted high levels of contamination in exhaust gas scrubber washwater discharge.
Marine exhaust gas scrubbing systems for heavy fuel oil burning ships are becoming mainstream with various configurations including open loop, closed loop and hybrid systems. Oxides of sulphur and nitrogen along with particulates and unburned hydrocarbons are removed into the very high volumes of wash ater sprayed into the exhaust scrubber system. The washwater can be a combination of seawater with a natural buffer capacity and/or fresh water with buffer added to neutralize the acids formed when sulphur contacts the water. The contaminated wash water is then discharged directly to the sea or contained and treated before discharge depending on the system and the specific rules that apply to that situation. With the exhaust contaminants then contained in the water phase, the environment must be protected from abnormally high discharges.
The monitor provides PAH, turbidity and temperature with input for pH all in one monitor. It covers the entire range of concentrations, is self-cleaning, and operators can validate operation for Port State Control inspectors or management onboard at any time.
