Advanced oil-water separation technologies for demanding industrial wastewater applications treatment. From gravity-based API separators to high-efficiency coalescing systems, we deliver solutions that achieve discharge compliance with oil levels down to 5 ppm. Engineered for oil & gas, petrochemical, automotive, and manufacturing applications.
CFD, P&ID, SCADA and commissioning for critical water treatment plants.
Plant layouts, piping isometrics and construction-ready engineering drawings.
Flow, mixing and thermal CFD across treatment and process equipment.
Full mechanical, physico-chemical, biological and sludge equipment range.
Oil-water separation is critical for industries generating oily wastewater. Our comprehensive range of separation technologies addresses applications from free oil removal to emulsified oil treatment, ensuring compliance with environmental discharge standards including EPA Clean Water Act, OSPAR, and local regulations.
Screening & settling
API/CPI separation
Coalescing/DAF
< 5-15 ppm oil
We offer a complete range of oil-water separation technologies to match your specific application requirements.
Traditional gravity separation using Stokes' Law principles. Rectangular basins with inlet diffusers, parallel plate sections, and oil skimming mechanisms. Ideal for high-flow applications with free oil removal.
150-1500 m³/hrFree oil >150 micronAPI 421 compliantEnhanced gravity separation using inclined corrugated plates to reduce settling distance. Compact footprint with high separation efficiency. Suitable for applications with limited space.
50-500 m³/hrOil >60 micronSpace-savingDissolved Air Flotation for removing emulsified oils and fine suspended solids. Micro-bubbles attach to oil droplets, floating them to the surface for skimming. Effective for stable emulsions.
10-500 m³/hrEmulsified oil<15 ppm achievableHigh-efficiency separation using oleophilic media packs that promote droplet coalescence. Achieves very low oil concentrations suitable for direct discharge or reuse applications.
5-200 m³/hr<5 ppm achievablePolishing stageFor oil contaminated with magnetic particles or when using magnetic additives. High-gradient magnetic separators remove oil-magnetic particle agglomerates from wastewater streams.
Speciality applicationsMagnetic particlesHigh efficiencyPre-engineered oil-water separation plants housed in ISO shipping containers. Rapid deployment, minimal civil works, and easy relocation. Ideal for remote sites and temporary operations.
10-200 m³/hrPlug & playRapid deploymentSelection of the appropriate technology depends on inlet oil concentration, droplet size distribution, and required discharge limits.
| Technology | Inlet Oil Range | Outlet Performance | Droplet Size | Best For |
|---|---|---|---|---|
| API Separator | 100-1000 mg/L | 10-15 mg/L | >150 micron | High flow, free oil |
| CPI Separator | 50-500 mg/L | 5-10 mg/L | >60 micron | Space-constrained |
| DAF Flotation | 20-200 mg/L | 5-15 mg/L | Emulsified oil | Stable emulsions |
| Coalescing Media | 10-100 mg/L | <5 mg/L | >20 micron | Polishing stage |
| Multi-Stage System | 100-1000 mg/L | <5 mg/L | All sizes | Stringent discharge |
Produced water treatment, refinery wastewater, tank farm runoff, and drilling mud processing.
Process wastewater, tank cleaning, cooling tower blowdown, and spill containment.
Vehicle wash water, machining coolant, parts washing, and stamping operations.
Aircraft deicing runoff, fuel farm drainage, and maintenance facility wastewater.
Bilge water treatment, ballast water, and port facility wastewater.
Transformer oil leaks, turbine wash water, and fuel oil containment.
Equipment washdown, fuel storage areas, and processing plant runoff.
Fat and grease removal from meat, dairy, and fried food operations.
Our oil-water separation systems are designed to meet worldwide discharge standards and industry regulations.
Compliance with federal discharge limits typically requiring <15 mg/L oil for onshore and <5 mg/L for offshore.
OSPAR requires <30 mg/L oil for produced water discharge to the North Sea.
MARPOL Annex I requires <15 ppm oil for bilge water discharge from vessels.
Reynolds & Bauhm systems are designed to achieve oil discharge levels that meet or exceed regulatory requirements. Multi-stage treatment processes can achieve <5 ppm oil in discharge, enabling water reuse or safe discharge to sensitive environments.
Integrated automation for continuous monitoring and control of oil-water separation processes.
Our oil-water separation systems can be equipped with comprehensive SCADA integration for real-time monitoring of oil levels, flow rates, pressure, and effluent quality. Remote access enables automated control of skimming operations, chemical dosing, and alarm management for unmanned facilities.
Mobile advanced biological treatment plants in standard containers.
View PageOil and gas wastewater treatment for containerised oil-water separation.
View PageContainerised physico-chemical wastewater treatment with dissolved air flotation (DAF).
View Containerised OptionStokes’-law sizing, API Publication 421 design methodology, rectangular API / CPI / TPI configurations and refinery-train integration.
Sizing, components, types, materials, codes & compliance — the full engineering reference for gravity oil-water separation.
Read the API Separators PageCompare the three dominant configurations side-by-side — droplet cut-size, footprint, Operating expenditure and best-fit applications.
Compare Separator TypesCFD-verified F-factor for shorter basins, optimised inlet diffusers and reduced civils Capital expenditure.
CFD EngineeringContact our engineering team to discuss your specific application and discover the optimal separation technology for your wastewater.
Our expertise spans multiple industries with sector-specific water treatment solutions.