Compact, robust water treatment systems engineered for offshore platforms with space constraints, harsh marine environments, and strict discharge standards. ATEX-certified options available.
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.
Space-Efficient Solutions for Offshore Operations
Offshore oil and gas platforms face unique challenges including severe space constraints, harsh marine environments, and strict discharge regulations. Our compact treatment systems are engineered to fit within limited deck space while delivering reliable performance in corrosive salt-air conditions and meeting stringent marine discharge standards. Compact flotation, hydrocyclones and produced-water polishing meet overboard discharge limits within tight weight and footprint budgets. Every package is built for corrosion resistance and minimal operator intervention in the offshore environment.
Space-optimised equipment with 70% smaller footprint than conventional systems, maximising valuable platform deck space.
Meet strict offshore discharge limits of <30 mg/L oil for produced water and <15 mg/L for deck drainage.
Marine-grade materials and coatings resist salt corrosion, ensuring long service life in demanding offshore conditions.
Equipment rated for Zone 1 and Zone 2 hazardous areas with explosion-proof components for platform safety.
Offshore Water Treatment Needs
Treatment of formation water from oil and gas wells to meet marine discharge standards or prepare for reinjection.
Oily water separation from platform deck drainage, drip trays, and equipment washdown operations.
Treatment of ballast water to prevent transfer of invasive species between marine environments.
Oil separation from machinery space bilge water meeting MARPOL discharge requirements.
Treatment of utility and process wastewater from platform operations and maintenance activities.
Side-stream filtration and treatment of cooling water systems to prevent fouling and scaling.
Compact Multi-Stage Offshore Treatment
Screens remove debris while grit chambers settle coarse solids protecting downstream equipment.
Compact separators remove free oil and settleable solids through gravity separation.
DAF systems remove emulsified oil and fine suspended solids through microbubble flotation.
Offshore-Ready Products
Space-efficient dissolved air flotation systems with ATEX certification for offshore platforms.
Benefit: 70% smaller footprint
High-rate clarification in compact design ideal for space-constrained offshore installations.
Benefit: Minimal deck space
Automatic backwash filtration with minimal maintenance requirements for remote operations.
Benefit: No operator attention
Pre-assembled systems in DNV-certified containers for rapid offshore deployment.
Benefit: Plug-and-play install
Compact screw presses for minimising sludge volume and reducing disposal requirements.
Benefit: Reduce disposal requirement
Explosion-proof components rated for Zone 1 and Zone 2 hazardous area classification.
Benefit: Platform safety
Why Choose Reynolds & Bauhm
Explore Other Oil & Gas Solutions
Treatment of formation water from oil and gas wells for discharge or reinjection.
Explore Produced WaterWater treatment for onshore and offshore oil and gas extraction operations.
Explore Oilgas UpstreamPre-assembled treatment plants for rapid deployment to remote locations.
Explore Containerised SystemsDirectory 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 PageWeight, footprint, motion and explosive-atmosphere requirements drive offshore equipment selection.
Topsides weight is the binding offshore constraint. Skid weight per kg O₂ transfer or per m³/h treated drives selection. Compact flotation (CFU) wins on weight density vs lamella or sedimentation.
Modules must transport within standard module-yard envelopes (typically 30×15 m). Skids modularised to 12.2 m container length or 6.0 m mini-skids for retrofits.
FPSO motion (5° roll, 3° pitch typical) disrupts gravity separators. Use closed-pressure separators (cyclones, CFU) which are motion-insensitive. Avoid open weir clarifiers.
Most produced-water packages are Zone 1 or Zone 2 hazardous area. All motors, sensors and controls certified IECEx/ATEX. Use intrinsically-safe instrumentation where possible.
Duplex 2205 SS or super-duplex for chloride-rich produced water. CuNi for seawater. Coated carbon steel for fresh-water service. Specify in advance — lead time can dominate schedule.
OSPAR overboard limit: 30 mg/L oil-in-water (monthly average). North Sea operators commonly design to <15 mg/L for headroom. Reinjection re-use route relaxes oil but tightens TSS to <5 mg/L.
| Constraint | Onshore | Offshore |
|---|---|---|
| Weight density (t/m³ treated) | Flexible | <0.5 typical |
| Footprint per m³/h | Flexible | <0.5 m² |
| Suitable separator | API, IGF, DAF | Cyclone, CFU, IGF |
| Hazardous area class | Often non-classified | Zone 1/2 default |
| Maintenance access | Easy | Restricted, planned outages |
| Discharge limit (oil mg/L) | 10–40 (regulator-dependent) | 30 (OSPAR), tightening |
Stokes’-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 to design a system tailored to your platform requirements.
Our expertise spans multiple industries with sector-specific water treatment solutions.