Industrial wastewater treatment
Industrial Oil Water Separators | Above & Below Ground Systems
Industrial oil water separators for wastewater, wash bays, manufacturing, marine, and oil and gas applications. Above- and below-ground systems are engineered for your flow, oil load, and discharge requirements.
Oil Water Separator products
Industrial oil water separators are used as pretreatment to remove free and dispersed, non-emulsified hydrocarbons and settleable solids from wastewater. Ecologix designs systems for gasoline, diesel, motor oil, crude oil, wash-water, stormwater, marine, manufacturing, and oil-and-gas applications.
The right separator depends on more than the nominal flow rate. Oil specific gravity, droplet size, temperature, solids loading, oil concentration, installation conditions, and required effluent quality all affect sizing and treatment selection. For emulsified or dissolved hydrocarbons, a separator may need to be followed by polishing media, DAF, or another treatment process.
Use our oil-water separator sizing calculator to start, or send your wastewater details to our engineering team.
Choose the right oil water separator
| System | Best suited for | Installation | Primary design inputs |
|---|---|---|---|
| Above-ground OWS | Industrial wastewater and process streams | Above grade | Flow, oil loading, solids, materials |
| Below-ground OWS | Vehicle wash bays and site drainage | Underground | Flow, burial conditions, access, solids |
| Gun barrel separator | Produced water and oilfield streams | Site-specific | Oil-to-water ratio, flow, residence time |
| Polishing media | Residual, emulsified, or dissolved hydrocarbons | Downstream treatment | Influent concentration and chemistry |
Design, compliance, and operating guidance
Learn more about API 421 separator compliance and upgrades, compare above-ground and below-ground systems, and review our oil-water separator maintenance practices before selecting equipment.
For examples of engineered installations, see the Melones Oil Terminal case study and the gas station upgrade case study.
Request an Oil Water Separator quote
Connect with our experts today
Oil Water Separator Quote Request
Above Ground Oil Water Separators
Ecologix above ground oil water separators use parallel corrugated plate technology that causes oil droplets to increase in size, and separate more quickly.

AHP-55 Liquid Phase Vessels
Ecologix AHP-55 Liquid Phase Vessels charged with our OrganoClay media are designed for the removal of free floating oil droplets and sheens in water.

Below Ground Oil Water Separators
The Ecologix HQB Cylindrical Gravity Displacement Oil Water Separator will remove essentially 100% of all free and dispersed non-emulsified oil from the water stream larger than 20 microns in diameter with a specific gravity of .88 or less.

Gun Barrel Oil Water Separators for the Oil Sector
Specialized gunbarrel oil water separators are best suited for applications that have oil volume in excess of water volume in the produced fluids.

Marine Grade Oil Water Separators (BORS)
Bilge Oil Removal Systems are an industrial marine grade oil water separator that has a variety of applications.

OilFree Filter Cartridges
OilFree is a patented polymeric technology that is applied to all Oilfree filter cartridges and related technologies. The Oilfree solution removes hydrocarbons from water, emulsified pollutants from water, PCB's, BTEX, oily sheen, synthetic and natural oils, solvents and organically bound metals from water.

OrganoClay Cartridge Filters (MCM)
MCM OrganoClay Cartridge Filters are engineered for the removal of dispersed, emulsified and dissolved hydro-carbons from aqueous solutions.

SkimLoop Oil Water Separator
The SkimLoop Oil Water Separator (OWS) sets the industry standard for skimming and separating floating oils and solids from industrial fluids.
Oil Water Separator Industries
Oil Water Separators for the Automotive & Transportation Industry
Ecologix Systems' oil water separators are crucial for treating washdown water, gasoline, diesel, and other oils in vehicle maintenance, car washes, and repair shops. Ensuring environmental compliance and efficient operations.
Oil Water Separators for the Manufacturing Industry
Learn how Ecologix Systems' oil water separators effectively treat wastewater contaminated with lubricants, cutting fluids, and process oils in manufacturing and industrial facilities, ensuring compliance and efficiency.


















