Back to Oily Water Separators

Processing Mode Oil water is drawn from the holding tank into the water separator, with suction provided by a positive displacement pump on the discharge side of the separator.   Several separation zones are created by the inlet weir and baffle, two coalescer beds, and the quiescent water spaces between them.   The upper zone of the tank enhances gravity separation. The inlet baffle diverts the flow away from the upper coalescer bed, enabling oily water and wastewater discharge to float to the tank top. The inlet weir divides the oil accumulated in the tank top from the inlet flow.   The polypropylene granules contained in the coalescer beds attract oil and repel water, (oleophyllic-hydrophobic), allowing water to flow through, while the oil remains behind on the surface of the polypropylene. These oil droplets accumulate in the beds and grow in size, then become buoyant and float to the tank top.   The clarified effluent exits through the outlet in the tank bottom and is discharged by the pump. Oil Discharge Mode When the lower interface probe detects oil, the system enters the Oil Discharge Mode. The pump stops and the automatic valves switch to allow backflush water into the tank bottom. This water backflushes the coalescer beds while at the same time displacing collected oil from the top to a slop tank. Manual Backflush A manual push-button positions all valves for manual backflushing, with the the backflush water directed to the holding tank. Bilge Alarms/Monitors The APT-OWS is compatible with all approved 15 ppm bilge alarms and 15/100 ppm monitors, with either one installed as a customer option. Automatic recirculation or shutdown function are provided with the unit as required. Remote alarms and chart recorders are also available.