- The first part of the unit is a compartment that is very coarse and it holds the catch-plates. It also contains a chamber where oil is collected. The chamber is the one responsible for containing the floating oil, the density of which is lesser compared to water. The oil is then injected into the sludge tank by a control valve and after that, the process of removing impurities will start.
- The system’s second part is the filter unit. The unit’s discharge is the input of the filter unit. Inside the filter unit is coalesce, the filter stage and another collecting chamber. The filter stage is the one responsible for picking up impurities which sinks at the bottom after. Coalesce is the one causing coalescence. During this stage, the droplets of oil join the mixture which causes a higher surface tension. As soon as the surface tension broke down, the crooks are lifted to the collecting chamber. During this stage, the energy emitted by the bilge water which is still semi-treated is already less than 15 ppm, meaning it meets the legal limit for discharge.
- The third and last part of the separator is made up of a unit that monitors and controls the oil content. An alarm is set off in cases where the ppm reaches the calibration. The control unit is then responsible for stopping the oil water from flowing overboard as soon as the alarm sounds. This is done with the use of a solenoid valve. The final valve is made up of a system that goes three ways. It can contain oil discharges and then emits it to the sludge tank or sends it overboard. If the alarm beeps more than usual, it indicates that the system is not working efficiently and would require maintenance.