Comprehensive treatment systems for formation water from oil and gas wells, delivering efficient oil separation, solids removal, and polishing to meet discharge or reinjection standards.
Treat drilling muds, cuttings wash water and site runoff. Solid-liquid separation and water recycling for drilling operations.
Refinery wastewater treatment including API separators, DAF, advanced biological treatment and polishing for strict discharge.
Sour water and desalter effluent treatment for petroleum refineries.
ATEX-certified wastewater treatment equipment for explosive atmospheres in oil, gas and petrochemical facilities.
How we treated offshore produced water to OSPAR oil-in-water limits for compliant overboard discharge.
Read the Case StudySpecialised Solutions for Produced Water
Produced water is the largest volume waste stream generated during oil and gas extraction, typically containing oil, suspended solids, dissolved salts, and production chemicals. Our treatment systems efficiently remove contaminants to meet stringent discharge requirements or prepare water for beneficial reuse and reinjection. Hydrocyclones, flotation, walnut-shell filtration and membrane polishing strip oil and solids to meet overboard, disposal or reinjection specifications. Reynolds & Bauhm size each train to the field’s water cut so it performs as production-water volumes rise.
Multi-stage oil removal from free oil to emulsified fractions using gravity separation, DAF, and coalescing technologies achieving 95%+ removal efficiency.
Effective removal of formation solids, scale, and corrosion products through screening, sedimentation, and filtration processes.
Polishing treatment to meet injection well standards, protecting reservoir integrity and maximising oil recovery operations.
Meet environmental discharge limits for oil content, suspended solids, and other regulated parameters in surface waters.
Produced Water Sources We Treat
Treatment of produced water from conventional and unconventional oil extraction including shale oil operations with high volumes.
Compact treatment systems for offshore oil production with space constraints and strict marine discharge standards.
Treatment of water co-produced with natural gas including condensate and associated water from gas wells.
Treatment of produced water from EOR operations including polymer flooding and steam-assisted gravity drainage.
Specialised treatment for CBM produced water with high salinity and unique geochemical characteristics.
Polishing treatment for water reinjection to maintain reservoir pressure and enhance oil recovery.
Multi-Stage Produced Water Treatment
Gravity separation in API separators removes free oil and settleable solids from produced water.
DAF systems remove emulsified oil and fine suspended solids through microbubble flotation.
LAMELLA separators provide high-rate solids separation for polishing and reinjection preparation.
Self-cleaning filters provide final suspended solids removal before discharge or reinjection.
Products for Produced Water Treatment
High-efficiency dissolved air flotation for oil and suspended solids removal from produced water streams.
Benefit: 95%+ oil removal efficiency
Gravity separation systems for free oil removal with robust construction for continuous operation.
Benefit: Low operating requirements
High-rate clarification for suspended solids removal in compact footprint ideal for offshore platforms.
Benefit: 70% smaller footprint
Automatic backwash filtration for final polishing and protection of injection wells.
Benefit: Continuous operation
Screw presses and centrifuges for dewatering oil sludge and solids for disposal.
Benefit: 60-80% disposal requirement reduction
Mobile treatment plants for remote locations and rapid deployment to production sites.
Benefit: Plug-and-play installation
Why Choose Reynolds & Bauhm
Explore Other Oil & Gas Solutions
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Explore Oilgas DrillingEquipment engineered for explosive atmospheres with ATEX-certified components.
Explore ATEXDirectory of international wastewater treatment regulations and equipment compliance standards Organised by country and region.
View PageATEX-certified wastewater treatment equipment for explosive atmospheres in oil, gas and petrochemical facilities.
View PageRefinery wastewater treatment including API separators, DAF, advanced biological treatment and polishing for strict discharge.
View PageFrom influent characterisation to treatment-train sizing for offshore, onshore and unconventional produced water.
Inlet free oil typically 200–2,000 mg/L. First-stage gravity (skim tank or API separator) reduces to 50–200 mg/L. Sized for 30–60 minute residence time, slot velocity < 15 mm/s.
Liner-type deoiling cyclones operate at 600–1,200 kPa differential pressure. Oil-in-water reduces from 100–500 mg/L to 10–40 mg/L. Compact footprint for offshore installations.
Combines gas flotation with internal coalescence. Final-polish oil to <15 mg/L for overboard discharge under OSPAR. Hydraulic loading: 25–40 m³/m²·h.
Tertiary polishing filter, downflow at 25–35 m/h. Removes residual oil and TSS to <5 mg/L. Backwash uses produced water; backwash water returned to skim tank.
Field-dependent: 5,000–200,000 mg/L. Use SS316L below 60,000; duplex 2205 to 120,000; super-duplex or GRE/glass-reinforced epoxy above. Specify chloride limits at design stage.
For waterflood injection: clarify to <50 mg/L TSS, <5 mg/L oil; control SRB with biocide; degas to remove dissolved oxygen to <20 ppb.
| Treatment stage | Inlet oil (mg/L) | Outlet oil (mg/L) | Hydraulic loading | Footprint indicator |
|---|---|---|---|---|
| Skim tank / API | 200–2,000 | 50–200 | 10–25 m³/h·m² | Large |
| Deoiling hydrocyclone | 100–500 | 10–40 | Linear, low ΔP | Compact — ideal offshore |
| Compact flotation (CFU) | 40–100 | 5–15 | 25–40 m³/h·m² | Compact |
| Walnut-shell filter | 10–30 | <5 | 25–35 m/h | Medium |
| MF/UF membrane | 5–30 | <1 | 40–100 LMH | Medium |
Indicative ranges — actual sizing requires field-specific characterisation including salinity, gravity, emulsion stability, residual chemistry and discharge consent.
Produced-water pH control for downstream membrane or injection-water compatibility.
Read MoreAll pH adjustment technologies, reagents and reactor designs.
Read MoreFeedback, feed-forward and cascade control for pH dosing loops.
Read MoreRight pump for acid / caustic / lime dosing duties.
Read MoreStokes’-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 EngineeringScientific and compliance guides for produced water treatment, discharge and reuse
Free, dispersed and dissolved oil fractions, droplet-size distribution and emulsion stability that govern deoiling design.
View GuideSeparators, hydrocyclones, induced and dissolved gas flotation and nutshell media selected by droplet size and outlet target.
View GuideAir stripping, adsorption and biological treatment for the dissolved aromatics that set the reuse limiting case.
View GuideAntiscalant, sulphide oxidation and precipitation control for scaling ions, H2S and trace metals.
View GuideOSPAR 30 mg/L, US EPA ELG and regional limits, reference methods and online oil-in-water monitoring.
View GuideWaterflood, disposal-well and beneficial-reuse quality targets and the treatment to meet them.
View GuideContact our experts to design a system tailored to your oilfield requirements.
Our expertise spans multiple industries with sector-specific water treatment solutions.