Specialised water treatment solutions for oil and gas operations with ATEX-certified equipment for hazardous environments.
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.
Oil and gas wastewater treatment for produced water treatment.
Sour water and desalter effluent treatment for petroleum refineries.
Water Management for Oil & Gas Operations
Oil and gas operations generate challenging wastewater streams including produced water, refinery effluents, and platform discharge containing hydrocarbons, suspended solids, and dissolved contaminants. Our treatment solutions are engineered for hazardous environments with ATEX-certified equipment and robust construction. Hydrocarbon removal, dissolved-contaminant treatment and solids handling are combined into trains rated for hazardous, often remote, environments. Reynolds & Bauhm engineer each system to the specific stream — produced water, refinery effluent or platform discharge — for reliable consent compliance and reuse.
Treatment of formation water from oil and gas wells to meet discharge or reinjection standards. Remove oil, suspended solids, and dissolved organics efficiently.
Explore Produced WaterComprehensive treatment for petroleum refinery effluents containing oil, phenols, sulphides, and high COD loads with multi-stage processes.
Oil Separation · Biological Treatment · Sour Water · Sludge · Reuse
Explore Oilgas RefineryCompact, robust treatment systems for offshore platforms with space constraints and harsh marine environments. ATEX-certified options available.
Explore Oilgas OffshoreEquipment engineered for explosive atmospheres with ATEX-certified components, ensuring safe operation in hazardous zones.
Explore ATEXOil & Gas Sectors We Serve
Produced water treatment from oil and gas extraction including onshore fields, offshore platforms, and enhanced oil recovery operations.
Explore Oilgas UpstreamWastewater treatment for pipelines, terminals, and storage facilities handling crude oil and refined products.
Explore MidstreamComprehensive treatment for petroleum refineries processing complex effluents with oil, chemicals, and high organic loads.
Explore DownstreamSpecialised treatment for petrochemical manufacturing wastewater with specific contaminant profiles.
Explore PetrochemicalWater treatment for natural gas processing facilities including dehydration and acid gas removal operations.
Explore Oilgas Gas ProcessingTreatment of drilling muds, completion fluids, and workover waste with high solids and chemical content.
Explore Oilgas DrillingStream chemistry by source — the starting point for treatment-train design
| Stream | TDS / Salinity | Oil & Grease (mg/L) | BOD / COD (mg/L) | Key Contaminants | Notes |
|---|---|---|---|---|---|
| Produced water (conventional) | 5,000 – 300,000 | 50 – 2,000 | BOD 100 – 2,000; COD 500 – 5,000 | BTEX, naphthenic acids, dissolved Fe/Mn, NORM (Ra-226/228), residual production chemicals | Cl− often >50,000 mg/L; pH 6–8 |
| Produced water (shale / fracking) | 30,000 – 250,000 | 30 – 1,000 | COD 200 – 1,500 | Frac fluid additives, boron, biocides, scale formers (Ba, Sr) | High BaSO4 scaling risk |
| Refinery sour water | 500 – 5,000 | 5 – 200 | COD 500 – 3,000 | NH3 50–1,000; H2S 100–3,000; phenols 20–500; cyanide 0–50 | Two-stage stripping (H2S/NH3) before bio |
| Refinery process effluent | 500 – 3,000 | 50 – 1,500 | BOD 100 – 800; COD 300 – 2,500 | Phenols, mercaptans, MTBE, residual amines, sulphates | API separator + DAF + bio standard train |
| Tank-bottom water / desalter | 10,000 – 100,000 | 500 – 10,000 | COD 1,000 – 8,000 | Emulsified oil, asphaltenes, fine solids | Heat + demulsifier + electrostatic coalescence |
| Cooling tower blowdown | 2,000 – 10,000 | < 5 | BOD < 30 | Cycles-of-concentration scale, biocides, corrosion inhibitors | Driven by cycles N = 3–7 |
| Drilling-fluid / mud waste | 5,000 – 50,000 | 20 – 500 (OBM higher) | COD 500 – 5,000 | Bentonite, barite, polymers (PHPA, xanthan), lignosulfonates | Solids 5–30% w/w; ZLD often required |
| Offshore platform drainage | seawater + traces | 10 – 100 | COD < 200 | Oil sheen, drilling chemicals, seawater | OSPAR <30 mg/L oil dispersed for North Sea discharge |
Discharge limits: OSPAR (North Sea) 30 mg/L oil monthly avg; US EPA NPDES 29 mg/L daily max; reinjection-only for high-salinity onshore unconventional wells. Always confirm permit conditions before sizing.
Multi-Stage Approach
Screening and grit removal to protect downstream equipment and remove debris from process streams.
DAF systems for efficient oil and grease removal through microbubble flotation technology.
LAMELLA separators for high-rate clarification of suspended solids and precipitated contaminants.
MBBR or SBR systems for removal of dissolved organics and reduction of COD/BOD.
Products for Oil & Gas Applications
High-efficiency dissolved air flotation for oil and grease removal from produced water and refinery effluents. ATEX-certified options available.
Benefit: 95%+ oil removal efficiency
API separators, CPI, DAF flotation, and coalescing systems for oil removal from produced water and refinery effluents. Achieve discharge compliance down to 5 ppm.
Benefit: 95%+ oil removal, compliance guaranteed
High-rate clarification for suspended solids removal. Compact design ideal for space-constrained offshore platforms.
Benefit: 70% smaller footprint
MBBR and SBR systems for removing dissolved organics and reducing COD from refinery and petrochemical wastewater.
Benefit: Up to 95% COD removal
Automatic backwash filtration for final polishing and protection of downstream equipment or injection wells.
Benefit: Continuous operation, no operator needed
Mobile treatment plants for remote locations, temporary operations, and rapid deployment to production sites.
Benefit: Plug-and-play installation
ASME-certified storage tanks for produced water, formation water, and chemical storage with corrosion-resistant coatings.
Benefit: H2S and CO2 resistant
Pressure vessels and process tanks for chemical conditioning and treatment, mixing, and reaction applications in oil & gas operations.
Benefit: ASME VIII certified
Pre-assembled, factory-tested treatment skids engineered, fabricated and certified to international oil & gas standards for rapid, compliant deployment — onshore, offshore and at remote well sites.
API 421 oil-water separator design, API 650 welded storage tanks, API 610 / 682 pumps & mechanical seals, and API 614 lube/seal systems.
ASME VIII Div 1 U-stamped pressure vessels and ASME B31.3 process piping — full weld procedures, NDT and hydrotest records.
Built to client Shell DEP (Design & Engineering Practice) and NORSOK M-501 / M-630 coating & material requirements for offshore service.
NACE MR0175 / ISO 15156 for H2S sour service — duplex, super-duplex and CRA selection with defined corrosion allowance.
ATEX & IECEx Zone 1 / Zone 2 certified motors, instruments and panels; Ex d / Ex e enclosures and intrinsically-safe loops.
ISO 9001 / 14001 management systems, full FAT/SAT, material traceability (MTRs) and document-dossier handover.
Gravity and corrugated-plate interceptor skids for bulk free-oil and solids removal ahead of polishing.
View API SeparatorsCompact IGF for dispersed-oil removal to <20 ppm on produced water, with inline chemical conditioning.
DAF skids for oil, grease and TSS in refinery and produced-water streams — ATEX-rated for hazardous areas.
View Oil & Gas DAFHigh-G liquid-liquid hydrocyclones for compact, no-moving-part deoiling of high-flow produced water.
Nutshell media filters for final oil-in-water polishing to tight discharge or re-injection limits.
ATEX dosing skids for demulsifier, coagulant, and scale / corrosion inhibitor with duty-standby metering pumps.
View Dosing SystemsOperational, Environmental & Economic Advantages
Explore Other Industries We Serve
Wastewater treatment for chemical manufacturing facilities.
Chemical Processing SolutionsPre-treatment solutions for industrial facilities.
View Pre-Treatment SolutionsStokes’-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 EngineeringPackaged, containerised, skid-mounted and research-station families engineered for sites with no road, no grid, no operator and no local supply chain.
All five product families plus the engineering choices that span the catalogue — transport envelopes, off-grid power, satellite SCADA, swap-on-failure spares.
Read the HubComplete plants delivered as a single pre-commissioned package — villages, mining camps, expedition bases.
Read More10′, 20′ and 40′ ISO container plants hardened for hurricane, arctic, desert and salt-air environments.
Read MoreModular skids sized to helicopter sling-loads, 4×4 trailers and ATV sleds for sites with no road access.
Read MoreContact our experts for ATEX-compliant solutions for your operation.
Oil & gas water-treatment packages are engineered to the relevant API standards for tanks, separators, pumps and overpressure protection.
Our expertise spans multiple industries with sector-specific water treatment solutions.
Explore closely-related topics, equipment and guides
Send your influent analysis and our engineers assess your process and recommend a tailored treatment solution — free, confidential and no obligation.
Select the regulatory standard for your country — it sets which parameters we need for a compliance-aware process assessment.
Required parameters for the chosen standard are flagged on the sample form. You can still submit a partial set and we will advise what else to test.
Your sample is stored against your company so we can track the project. Provide a company name or email as a minimum.