What information do you need to size a seawater RO or industrial water treatment system?

Send a recent raw water analysis (TDS, conductivity, hardness, silica, iron/manganese, SDI or turbidity, oil and suspended solids where relevant), feed water temperature range, required product water quality and daily capacity, target recovery, available power supply (voltage/frequency), site conditions and whether you prefer a skid or containerized layout. With this data our engineers prepare a process design, mass balance and equipment list.

How fast can a containerized seawater desalination plant start producing water?

Tongjie containerized seawater RO units are fully prefabricated, assembled and tested in our Shanghai factory before shipment. On arrival the unit only needs basic power, intake and product water connections, so commissioning is short and predictable, which suits emergency supply, remote islands, construction camps and decentralized permanent supply.

Can your oil and gas produced water system meet reinjection requirements?

Yes. The system combines oil removal, softening, disc tube reverse osmosis (DTRO) and concentration. Treated reinjection water reaches oil content of 5 mg/L or less and suspended solids of 1 mg/L or less, enabling zero-discharge reuse of fracturing flowback. The skid-mounted container design can be commissioned within about 15 days and supports unmanned operation with remote monitoring for sites such as the Middle East and Kazakhstan.

Do your pharmaceutical purified water systems support validation?

Our pharmaceutical water systems use pretreatment, precision filtration, RO and EDI, and are built to pharmaceutical engineering practice with online monitoring of conductivity, temperature and flow. Data is recorded and traceable, and documentation is prepared to support your validation and qualification activities.

Do you offer ODM/OEM water treatment equipment?

Yes. We supply ODM/OEM membrane systems for distributors, EPC contractors and equipment brands, including customized capacity, materials, control systems, container layouts, labeling and documentation.

Which certifications and qualifications does Tongjie hold?

Tongjie holds CE certification and ISO 9001, ISO 14001 and ISO 45001 management system certifications. The company is a National High-Tech Enterprise and Shanghai Specialized & Sophisticated Enterprise, holds Class II contracting qualifications in environmental protection engineering and in mechanical and electrical installation, and owns more than 38 invention and utility patents plus software copyrights.

OEM Produced Water Filtration Factory & Supplier

Engineered Catalog

Advanced Water Separation & High-Salinity Concentration Skids

Prefabricated containerized modules and membrane separation units built with strict process control for worldwide utility and exploration operations.

CE Certification China Suppliers Factory Electronic Ultra-Pure Water System for Semiconductor & Microelectronics with 18.2 MΩ·cm Resistivity Factories, Manufacturer

High-Pressure DTRO STRO Concentration System

Wholesale High-Pressure Membrane Concentration System in China - Top Suppliers & Factory for DTRO & STRO Technology Factory, Supplier

OEM High-Salinity Wastewater Treatment System - ZLD Solutions from China Suppliers and Factory Suppliers, Manufacturers

OEM High-Ratio Water Reuse Equipment - Ultrafiltration & Reverse Osmosis by China Suppliers and Factory Suppliers, Supplier

Deoxygenation Membrane Physical Degassing

CE Certification China Suppliers Factory Deoxygenation Membrane Equipment for Physical Degassing of Water to ppb Levels Suppliers, Manufacturers

CE Certification Eco-Friendly Water Treatment Solutions - ODM Services from China Suppliers & Factory for Global Brands Suppliers, Manufacturer

China High-Ratio Water Reuse Equipment in China - Suppliers and Factory for Pretreatment, UF, and RO Process Suppliers, Supplier

China High-Ratio Water Reuse Equipment Supplier in China - Advanced Pretreatment, UF, and RO Factory Solutions Manufacturers, Manufacturer

Industry Dynamics

Produced Water Dynamics & Global Procurement Requirements

Addressing complex hydrocarbon mixtures, hyper-saline brines, and rigorous ESG mandates across North America, the GCC region, Central Asia, and Latin America.

From Waste Disposal to Beneficial Reuse

Depleting disposal reservoirs and tightening deep-well injection seismic regulations have shifted upstream operational models. Global operators now prioritize fracturing fluid circularity, industrial cooling make-up, and agricultural irrigation reuse, requiring total organic carbon (TOC) and hardness elimination down to non-scaling thresholds.

Thermal vs. High-Pressure Membrane OPEX

Conventional Multi-Stage Flash (MSF) and Mechanical Vapor Recompression (MVR) evaporators carry prohibitive capital expenditures and energy footprints exceeding 25-40 kWh/m³. Modern membrane concentration like DTRO and STRO compresses feed TDS up to 160,000 mg/L before thermal finishing, delivering over 45% net OPEX conservation.

Severe Environment Engineering Reliability

Produced water environments feature volatile organic compounds, H&sub2;S sour gas traces, elevated temperatures up to 60°C, and extreme salinity swings. Procurement teams necessitate 316L/2205 Duplex or Super Duplex metallurgy, open-channel fluid dynamics to counter colloidal fouling, and remote PLC diagnostic capabilities.

Process Architecture

Comprehensive Produced Water Process Blueprint

From de-oiling and chemical softening to high-pressure disc-tube membrane concentration and zero liquid discharge salt extraction.

Stage 1: Primary Clarification & De-Oiling

Incorporates Induced Gas Flotation (IGF), coalescing plate separators, and walnut shell filters to depress free and emulsified hydrocarbons from upwards of 2,000 mg/L down to ≤5 mg/L, safeguarding downstream composite membranes.

Stage 2: Chemical Softening & Degasification

Lime-soda or caustic softening combined with tubular microfiltration (TMF) precipitates multivalent ions (Ca²&spplus;, Mg²&spplus;, Ba²&spplus;, Sr²&spplus;, SiO&sub2;). Vacuum deoxygenation membranes subsequently strip physical dissolved oxygen down to low ppb thresholds.

Stage 3: DTRO / STRO High-Pressure Concentration

Disc Tube Reverse Osmosis (DTRO) operating at pressures reaching 75 bar to 160 bar channels high-turbidity, high-fouling feed via hydraulic fluid dynamics, concentrating total dissolved solids up to 160,000 ppm without premature scaling.

Stage 4: Evaporative Crystallization (ZLD)

MVR or forced-circulation evaporators drive terminal brine to saturation crystallization. Distillate is reclaimed as clean condensate for steam boiler make-up, while dry mixed or fractional salts are collected for industrial reuse or land-deposit.

Technical Comparison: Produced Water Treatment Methodologies

Technology Approach	TDS Handling Range	Energy Consumption	Fouling / Scaling Resilience	Footprint & Delivery Modality
Conventional Spiral-Wound RO	Up to 45,000 mg/L	2.5 – 4.5 kWh/m³	Low: Narrow spacer channels plug easily under oil & silts	Fixed civil construction or standard skids
Tongjie High-Pressure DTRO/STRO	40,000 – 160,000 mg/L	8.0 – 14.0 kWh/m³	Exceptional: Open turbulent flow channels, easy CIP	Modular containerized, rapid 15-day deployment
Thermal MVR / Crystallization Standalone	100,000 – 300,000 mg/L	30.0 – 55.0 kWh/m³	Moderate: Susceptible to severe heat exchanger fouling	Large footprint, heavy capex, lengthy civil assembly
Combined DTRO + Thermal Finishing (Tongjie ZLD)	1,000 – 250,000+ mg/L	12.0 – 20.0 kWh/m³ (Consolidated)	Optimized: Low thermal load via membrane pre-concentration	Integrated modular skids + compact crystallizer units

Reliability & E-E-A-T

Factory Execution, Global Compliance & Field Support

Strict adherence to international engineering codes, comprehensive in-house Factory Acceptance Testing (FAT), and rapid global support networks.

Manufacturing & Welding Standards

Our Shanghai facility operates certified pressure vessel welding lines under ASME Boiler and Pressure Vessel Code (Section VIII), EN 13445, and GB 150. Pipe spools undergo complete 100% radiographic and hydrostatic pressure testing, with automated orbital welding on stainless and titanium pipework.

Pre-Commissioned Factory FAT

Every produced water and seawater skid undergoes full-train hydraulic and electrical wet testing before departure. We verify pump head curves, instrument calibration loops, emergency failsafes, and remote PLC integrations, truncating on-site field setup to under two weeks.

Multi-Market Regulatory Compliance

Holders of European Conformity (CE) certificates, ISO 9001 (Quality), ISO 14001 (Environmental Management), and ISO 45001 (Occupational Safety). Tongjie holds Class II national environmental and mechanical engineering credentials, meeting regional mandates across the Middle East, Central Asia, and the Americas.

17+

Years Engineering Experience

38+

Patents & IP Assets

50+

Specialized R&D Engineers

1000+

Deployments Globally

Future Horizons

Technological Roadmap: The Next Era of Produced Water Management

Pioneering the intersection of artificial intelligence, novel material science, and mineral resource recovery.

AI-Guided Predictive Membrane Fouling

Integration of real-time sensor analytics, temperature-compensated osmotic tracking, and edge AI allows our systems to forecast organic and scaling saturation profiles hours in advance. Autonomous clean-in-place (CIP) cycling optimizes chemical dosage and prevents irreversible membrane compaction.

Lithium & Rare Element Extraction

Oilfield brines often bear significant concentrations of lithium, strontium, and rubidium. Tongjie's selective nanofiltration (NF) and Osmo-Assisted Reverse Osmosis (OARO) separation trains pre-fractionate monovalent and divalent salts, creating concentrated mineral precursors for subsequent refining.

Zero-Carbon Hybrid Desalination

Coupling off-grid modular solar photovoltaic fields with containerized membrane skids enables completely stand-alone produced water remediation in remote desert or offshore pad settings, drastically dropping carbon intensity factors per barrel of treated permeate.

Technical FAQ

Frequently Asked Engineering & Procurement Inquiries

Direct technical clarifications on design inputs, operating boundaries, recovery efficiencies, and factory delivery cycles.

What parameters are needed to size an oilfield produced water skid?

To provide an accurate engineering proposal, we require: (1) Feed water lab analysis including TDS, hardness (Ca²&spplus;, Mg²&spplus;, Ba²&spplus;, Sr²&spplus;), silica, free and emulsified oil (TPH), COD/BOD, and suspended solids; (2) Daily processing volume (m³/day or BPD); (3) Feed temperature and ambient extremes; (4) Desired permeate quality (deep-well reinjection, surface discharge, or boiler-grade feed); and (5) Site power specifications (voltage/frequency).

How does DTRO tolerate high-oil and high-turbidity flowback without blocking?

Disc Tube Reverse Osmosis (DTRO) avoids the traditional narrow mesh spacers of spiral membranes. Instead, open-channel hydrodynamic flow creates continuous radial turbulence across the membrane surface, preventing foulant cake accumulation and allowing operation under higher SDI (≤5) and residual oil levels (≤5 mg/L).

What treated reinjection water quality does Tongjie's system guarantee?

Our multi-stage filtration and DTRO system reliably meets reinjection and fracturing flowback standards: Oil content ≤ 5 mg/L (with optional secondary polishing ≤ 1 mg/L), suspended solids ≤ 1 mg/L, and particle median diameter < 1 μm. This protects formation permeability and eliminates wellbore plugging.

How fast can a containerized produced water plant be commissioned on-site?

Because all pumps, pressure vessels, chemical dosing skids, instrumentation, and PLC automation are skid-mounted, piped, and pre-tested during factory FAT in Shanghai, on-site commissioning is completed within approximately 15 days following utility hookup.

Can Tongjie provide white-label OEM or ODM systems for international EPCs?

Yes. We regularly design and construct OEM/ODM skids and container systems for global water technology distributors, international EPC firms, and equipment operators. We support customized structural layouts, specific component brands (e.g., Grundfos, Danfoss, Siemens, Allen-Bradley), bespoke frame paint schemes, and client-tailored technical documentation.

What certifications and design standards validate Tongjie's equipment?

Tongjie holds European CE certification alongside ISO 9001, ISO 14001, and ISO 45001 system credentials. We are a National High-Tech Enterprise holding Class II contracting licenses in environmental engineering and mechanical/electrical installations, with 38+ registered patents covering advanced membrane and high-salinity crystallization processes.

Complete Equipment Solutions