3SEP - Oily Water Separator

3SEP - Oily Water Separator
No more than 15-ppm

The 3SEP OWS is a dual stage oily bilge water separation system utilizing differential specific gravity, coalescence plates and filtration to separate and remove free and emulsified oil. The unit is available in five different capacities; 0.5 m3/h, 1.0 m3/h, 2.5 m3/h, 5.0 m3/h and 10.0 m3/h. The skid is optimised so that the footprint of the 3SEP OWS is as small as possible. The 1m3/h model pictured has a footprint of only 950 x 760mm.


The system is designed for a continuous flow with automatic operation. The system does not require any chemicals.

The first stage removes the free oil by gravity with the help of coalescence plates. An adjustable oil sensor controls the valve for automatic oil release to the sludge tank or any other dedicated tank. The adjustable oil sensor makes it possible to minimise the amount of treatable water released to the sludge tank.

In the second stage emulsified oil is removed in the two filter tanks and the ppm value is monitored by a 15-ppm bilge alarm, before the treated water is discharged overboard. The collected free oil on top of each filter tank is released automatically to the sludge tank at a pre-set interval. When a 15 ppm alarm occurs, the 3SEP OWS will automatically close the overboard line and re-circulate the treatable water to the bilge. When the contamination falls below 15 ppm the overboard valve will open again without human intervention.

The system is designed as a skid assembly with all connection points collected, for easy installation. When the unit reaches the customer the only remaining thing to do is to connect water inlets and outlets and the electrical power supply, facilitating quick and easy installation onboard. Before leaving our workshop each unit has to pass a quality-test, where all functions are tested.

All equipment has the highest quality; the tanks are made of acid proof stainless steel, AISI 316L. Our pumps are supplied by internationally recognised brands. Spare parts are easily available from one of our offices or representatives worldwide.

Main Features

  • Type approved in accordance with IMO MEPC 107(49)
  • Treated water below 15ppm
  • Separates free and emulsified oil
  • Continuous flow with automatic operation
  • Does not require any chemicals
  • Plug n' play, easy installation
  • Skid design, small footprint
  • High quality material and parts
  • Tanks made of stainless steel, AISI 316L
  • Can easily be connected to JOWA EBU unit for less than 5ppm applications
  • Capacity range 0.5-10 m3/h
  • Approvals; DNV, CCS, USCG & RMRS
  • Unaffected of rough sea

EBU - Emulsion Breaking Unit

EBU - Emulsion Breaking Unit
Separates up to 80% of the water in the emulsion

JOWA Emulsion Breaking Unit is designed to break apart water in oily water emulsions. The unit separates up to 80% of the water in the emulsion. The treated water is then fed to an MEPC 107(49) approved filter type/bilge water separator. The residue is pumped to the concentrated sludge tank.


The system is operating automatically, in a step-by-step program (PLC controlled). The working principle is flocculation.

  1. When the system starts it firstly makes an oil release in the gravity tank of the 3SEP, then it starts to fill up the settling tank with emulsified water, the emulsion breaking chemical is added, and mixed with the emulsified water and at the same time pH-adjusted. To end the first step, the oil from last batch is discharged to the sludge tank.
  2. During settling time the chemicals will break the emulsion, and create 3 different layers. (settling time is adjustable)
  3. After the settling, the system will start to discharge. The bottom layer is discharged to the sludge tank and the treated water to the oily water separator. The top layer will remain in the tank. All are controlled by a turbidity sensor.
  4. The system can be operated manually.
All alarms will be shown at the LCD display.


  • Capacity 6 ~32 m³/24h
  • Manual -or auto- operation
  • Skid mounted in two sections
  • Incorporates dosage pumps, discharge pump, valves and PLC control system


  • Compact design
  • Easy to install
  • PLC based control system
  • Vibration protecting system
  • Unaffected of rough sea

Jowa Hellas Ltd
Konstantinou Metaxa 14 Str.
174 55 Alimos
Athens GR

Tel: (+30) 210.9932 011
Fax: (+30) 211 8005 692

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