Prefabricated containerized process skids optimized for Qatar’s upstream drilling, fracturing return loops, and extreme salinity concentration requirements.
Chemical demulsification, mechanical centrifugation, and heavy-particle separation engineered for Qatar workover fluid recovery.
High-rate dissolved air flotation coupled with ceramic ultrafiltration for friction-reducer breakdown and continuous flowback recycling.
ISO/CE certified turn-key engineering skids incorporating Super Duplex metallurgy, 2507 pipework, and automated PLC control racks.
Membrane-based ultra-high-pressure concentration shrinking thermal evaporator duty, slashing operational CapEx across coastal plants.
As Qatar accelerates the massive North Field East (NFE) and North Field South (NFS) expansions, natural gas production surges toward 142 MTPA. With this escalation comes unprecedented produced water generation across Ras Laffan, Mesaieed, Dukhan, and Halul Island.
Target LNG Capacity
MECC Reinjection Oil Limit
ZLD Compliance Ready
Extreme Ambient Rating
The State of Qatar operates in one of the most water-stressed hydrological environments on Earth, relying primarily on thermal and seawater reverse osmosis (SWRO) desalination for domestic supply. Simultaneously, Qatar’s energy backbone—centered in Ras Laffan Industrial City (RLIC) and Mesaieed Industrial City (MIC)—yields millions of barrels of oil and gas produced water, rich in dissolved hydrocarbons, recalcitrant naphthenic acids, monoethylene glycol (MEG), heavy polyvalent scale ions (Ba2+, Sr2+), and total dissolved solids (TDS) exceeding 35,000 to 180,000 mg/L.
Under the strict governance of the Ministry of Environment and Climate Change (MECC) and QatarEnergy’s Sustainability Strategy, deep-well reinjection requires extreme filtration to preserve subterranean reservoir porosity, while coastal discharge faces severe thermal and chemical caps. Water reuse has shifted from an environmental aspiration to an operational prerequisite.
| Feedstock Salinity (TDS) | 35,000 – 180,000 ppm |
| Free & Emulsified Oil | 50 – 2,500 ppm |
| Suspended Solids (TSS) | 100 – 1,200 ppm |
| Post-Treatment Reinjection | Oil ≤5 mg/L | TSS ≤1 mg/L |
| Reuse Permeate Quality | TDS <300 ppm (Boiler/Cooling) |
Conventional flotation and media filtration fail when handling hyper-saline produced water with fluctuating emulsified hydrocarbons. Tongjie engineers a multi-barrier membrane envelope guaranteed against biofouling and scale precipitation.
Combines high-efficiency walnut shell walnut filters with inorganic SiC/Al2O3 ceramic ultrafiltration membranes. Resists extreme free hydrocarbon spikes (>5,000 ppm), aggressive steam CIP, and operating temperatures exceeding 80°C without polymer breakdown.
Open-channel, non-wound membrane cushions designed specifically for extreme fouling streams. Operating at operational pressures from 90 to 160 bar, DTRO extracts clean permeate directly from oily, high-turbidity brines that would irreversibly foul spiral elements within hours.
Mechanical Vapor Recompression (MVR) falling-film evaporators and forced-circulation crystallizers powered by high-efficiency titanium blowers. Recovers 98.5% of feed streams into boiler-feed condensate while precipitating solid, dry salts for disposal.
Removes free and dispersed condensate, reducing total oil content from thousands to <30 ppm.
Dosing & micro-coagulation eliminates BaSO4/SrSO4 scaling risks and breaks stubborn soluble organics.
Precision barrier removing sub-micron emulsified oil, coliforms, and TSS to zero turbidity.
Concentrates salinity to 120,000+ ppm while recovering 70-85% high-purity water for cooling systems.
Thermal closure: Clean distillate return + bagged solid salts ready for certified industrial landfill disposal.
Cross-sector integration: Matching process wastewater from gas trains, petrochemical cracking, and district cooling networks with circular reuse loops.
| Industrial Sector | Typical Inflow Water Matrix | Tongjie Engineered Solution Train | Achieved Water Quality | Reuse Destination in Doha |
|---|---|---|---|---|
| Upstream Gas Wellhead & Flowback North Field Wells |
TDS: 60,000–140,000 ppm Free Oil: 400 ppm Viscous Friction Reducers |
Demulsification Skid + DGF + Ceramic UF + DTRO Open-Channel Unit | TSS ≤ 1 mg/L Oil ≤ 3 mg/L Reinjection Ready |
Sub-surface pressure maintenance & workover re-blending. |
| Midstream LNG Processing Ras Laffan City Trains |
MEG slip streams BTEX & Naphthenic Acids Condensate contaminated water |
Steam Stripping + Advanced Fenton Oxidation + Dual-Stage RO Polish | TOC < 2 ppm Conductivity < 10 μS/cm |
Boiler feed make-up and high-pressure steam turbines. |
| Downstream Petrochemical Refineries Mesaieed Industrial City |
TDS: 15,000 ppm COD: 1,800 ppm Phenolic compounds & Ammonia |
MBR (Membrane Bioreactor) + Ozonation + Brackish Water RO (BWRO) | COD < 20 ppm TDS < 150 ppm |
Recirculating cooling tower circuits and plant utility washdown. |
| Doha District Cooling Plants Lusail & West Bay Systems |
Cooling blowdown water High calcium sulfate scaling Corrosion inhibitors |
Chemical Softening (Lime/Soda) + High-Recovery STRO + Multi-stage RO | Water Recovery > 90% Reduced Brine Footprint |
Re-circulation as chiller make-up, municipal irrigation buffer. |
The ambient climate of Doha and surrounding industrial zones poses unique engineering hazards: ambient summer temperatures frequently surpass 50°C, relative humidity reaches 90% along the coastline, and airborne dust particles contains high salt concentrations. Standard factory skids suffer from rapid VFD overheating, polymer brittle fracture, and severe pitting corrosion.
Tongjie custom-engineers each modular system specifically for Middle Eastern harsh-duty ratings:
Located in Shanghai’s advanced industrial manufacturing belt, Shanghai Tongjie Environmental Protection Technology Co., Ltd. (est. 2010) combines automated robotic fabrication, full wet-testing FAT docks, and complete supply chain vertical integration.
Every single containerized seawater RO or produced water reuse skid undergoes full hydrostatic pressure testing, dynamic hydraulic wet simulation, and automated electrical FAT (Factory Acceptance Test) before crating. Arrives on site in Doha ready for immediate tie-in.
Direct tier-1 strategic partnerships with membrane producers (DuPont, Hydranautics, Toray), high-pressure pump pioneers (Danfoss, Cat Pumps), and instrument giants (Endress+Hauser, Siemens). We eliminate distributor markups and guarantee rapid spare availability.
Benefit from Shanghai’s unparalleled manufacturing scale without sacrificing European or American engineering rigor. CE certified, ISO 9001, ISO 14001, and ISO 45001 audited, delivering EPC contractors maximum tender competitiveness in Qatar.
Tier-1 international EPCs (such as TechnipFMC, Chiyoda, Saipem, Petrofac, CCC, and JGC) executing QatarEnergy or Kahramaa contracts enforce stringent technical compliance audits before sub-vendor approval. Generic equipment assemblers cannot clear these gates.
Tongjie delivers an exhaustive EPC documentation package tailored to Qatar project specifications:
Are you preparing a tender bid for an industrial facility, LNG package, or wastewater reuse project in Qatar? Request our comprehensive engineering credential databook, ISO/CE certificates, and project reference lists.
From physical deoxygenation for corrosion prevention to containerized solar SWRO and advanced high-ratio wastewater recycling plants.
Advanced membrane multi-pass configuration delivering >85% reuse efficiency on challenging industrial effluents.
High-pressure hydraulic disc-tube reverse osmosis modules operating safely at pressures up to 120–160 bar.
Vacuum membrane contactor stripping dissolved oxygen down to <1 ppb without chemicals, preventing pipeline corrosion.
From pilot testing and computational fluid dynamics (CFD) modeling to turn-key modular skid fabrication in Shanghai.
Combines thermal vapor compression and membrane salt concentration, eliminating liquid discharge permits entirely.
High-recovery SWRO package designed for high salinity Arabian Gulf seawater (45,000 ppm TDS) with energy recovery.
Factory-integrated container system engineered for desert oilfield camps without stable grid power connections.
Energy-efficient process architecture cutting specific chemical consumption and carbon footprint across Qatar plants.
Clear answers to complex technical questions asked by EPC project directors, lead process engineers, and procurement managers in Qatar.
In Qatar’s North Field and Dukhan operations, produced water contains challenging emulsions of hydrocarbons, condensed aromatics (BTEX), and chemical additives. Traditional polymeric spiral-wound membranes foul rapidly under these conditions.
Tongjie utilizes a resilient 3-tier barrier: First, a dissolved gas flotation (DGF) unit coupled with chemical demulsifiers strips free floating oil. Second, our robust Silicon Carbide (SiC) or Aluminum Oxide (Al2O3) ceramic ultrafiltration membranes strip emulsified droplets down to <2 ppm without organic degradation. Third, for the concentration stage, we apply Disc Tube Reverse Osmosis (DTRO) or Spacer Tube RO (STRO), whose wide, open-channel hydrodynamic geometry eliminates dead zones and allows periodic aggressive CIP (Clean-In-Place) with caustic and surfactant formulations without unravelling the membrane element.
Yes. The Qatar MECC and QatarEnergy enforce strict caps on oil and grease (≤ 5 mg/L), total suspended solids (≤ 1 mg/L for reinjection), phenol, and heavy metals before any subsurface reinjection or coastal release is permitted.
Tongjie’s skid-mounted and containerized packages are explicitly engineered to exceed these thresholds, routinely delivering effluent with oil-in-water levels below 2 mg/L, undetectable TSS, and SDI < 2.5. Furthermore, our integrated SCADA architecture provides immutable, tamper-proof historical telemetry logging for straightforward compliance reporting to local environmental inspectors.
Arabian Gulf conditions are among the most corrosive globally. For high-salinity wetted service (TDS > 35,000 ppm), Tongjie strictly specifies Super Duplex Stainless Steel (2507 / UNS S32750) with a Pitting Resistance Equivalent Number (PREN) > 42, or Titanium Grade 2 for thermal evaporator vapor chambers. Low-pressure manifolds utilize high-grade CPVC, PVDF, or vinyl-ester rubber-lined carbon steel.
All electrical drives and automation panels are housed in IP66 / NEMA 4X 316L stainless steel enclosures equipped with dual-circuit tropicalized air conditioners rated for continuous operation at +55°C ambient. Motors are tropicalized with Class H insulation and thermistor protection.
Standard skid-mounted units and 20ft/40ft containerized systems have a production lead time of 8 to 12 weeks following final P&ID and GA drawing approval. Direct container vessel transit from Shanghai Port to Hamad Port (Doha) averages 18 to 24 days.
Because our plants are fully prefabricated, pre-wired, and wet-tested during Factory Acceptance Testing (FAT) in Shanghai, on-site installation in Doha involves only hydraulic piping tie-ins and main electrical hookups, cutting site commissioning time down to 10–15 days.
We provide full-lifecycle EPC execution support. Prior to dispatch, EPC inspectors or third-party agencies (SGS, TÜV, Lloyd’s) are hosted at our Shanghai manufacturing facility for exhaustive hydrostatic pressure tests, functional PLC logic validation, and weld NDT review. Upon arrival in Doha, our certified field service engineers deploy to the site for Site Acceptance Testing (SAT), loop checking, client operator training, and final handover of complete O&M manuals.
