Standardized and bespoke high-pressure membrane systems designed for severe fouling conditions, rapid mobilization, and California EPA Title 22 reuse benchmarks.
Tolerates hydraulic operating pressures up to 160 bar with an open-channel hydrodynamic geometry preventing scaling on complex hypersaline produced water streams.
Explore DTRO / STRO
Combines multi-stage mechanical brine pre-concentration with energy-optimized crystallization modules to achieve complete zero liquid discharge compliance.
Explore ZLD Reduction
Next-generation thermodynamic energy-saving membrane process breaking osmotic pressure barriers without the exorbitant power penalty of conventional thermal systems.
Explore OARO Systems
Multi-stage double-pass RO and continuous EDI polishing train delivering 18.2 MΩ·cm resistivity for critical manufacturing, cleanrooms, and high-tech utility feed.
Explore Ultra-Pure WaterNavigating acute water scarcity, rigorous EPA Region 9 regulations, and deep-well injection bans through robust decentralized membrane purification infrastructure.
The greater San Francisco Bay Area and its adjacent Northern California energy and industrial corridors (including Contra Costa refinery complexes, Solano logistics manufacturing, and Central Valley extraction margins) face an extraordinary intersection of ecological regulation and water resource fragility. Characterized by strict enforcement under the California State Water Resources Control Board (SWRCB) and San Francisco Bay Regional Water Quality Control Board (Region 2), industrial operators can no longer treat produced water or hyper-saline wastewater as mere waste streams.
Historically, oil and gas operations and co-located petro-refining infrastructure relied on Class II underground injection control (UIC) wells or municipal industrial sewer discharges. However, tightening seismic safety reviews, strict California Code of Regulations (CCR) Title 27 aquifer protections, and exorbitant transportation fees have rendered off-site hauling and deep injection economically unsustainable. Produced water in these regional plays presents extreme operational complexities: Total Dissolved Solids (TDS) fluctuating between 15,000 mg/L and exceeding 140,000 mg/L, persistent emulsified light and heavy petroleum hydrocarbons, volatile organic compounds (BTEX), dissolved silica, barium/strontium scale precursors, and naturally occurring radioactive materials (NORM).
Shanghai Tongjie Environmental Protection Technology steps into this demanding theater as an authoritative manufacturing partner. By supplying containerized, factory-tested produced water treatment and zero liquid discharge (ZLD) plants designed for rapid integration across San Francisco ports and inland industrial centers, we bridge the gap between rigorous California environmental compliance and industrial operational viability. Our modular process trains transform high-liability produced fluid into high-value Title 22 compliant utility water for cooling towers, boiler feed, and agricultural or aquifer recharge.
Analyzing the thermodynamic shift reducing energy consumption by 45–60% across industrial brine concentration and oilfield produced fluid recovery.
Legacy produced water treatment relied heavily on natural gas-fired thermal evaporators and mechanical vapor recompression (MVR) from 30,000 mg/L TDS upwards. Driven by California’s industrial decarbonization rules and carbon caps, the industry is transitioning to ultra-high-pressure membrane concentration (DTRO/STRO/OARO), concentrating brines mechanically up to 140,000–180,000 mg/L TDS at a fraction of thermal kilowatt-hour consumption.
High-salinity oilfield brines are no longer viewed strictly as waste. Emerging trends prioritize selective fractionation of sodium chloride and sodium sulfate, alongside extraction of battery-grade lithium, strontium, and iodine. Modern ZLD architectures incorporate selective nanofiltration (NF) and ion exchange ahead of final crystallization to generate revenue-offsetting industrial salts.
High land values and urban congestion in the San Francisco Bay Area preclude sprawling multi-acre concrete settling ponds. Modern procurement requires factory-skidded, containerized plug-and-play plants with micro footprints that can be mobilized within weeks, tied directly into refinery drainage headers or remote well pads, and operated under automated SCADA supervision.
Procuring water treatment assets for the North American market requires exhaustive verification of manufacturing authenticity, fabrication pedigree, and engineering validation. San Francisco EPCs and refinery asset managers scrutinize suppliers far beyond marketing brochures:
Pressure vessels fabricated to ASME Section VIII codes, duplex and super-duplex (2507/1.4410) metallurgy for chloride stress corrosion cracking prevention, and UL 508A certified control panels for local jurisdictional sign-offs.
Full hydraulic pressure testing, leak decay verifications, PLC loop testing, and real-time remote FAT streaming from our 10,000+ sqm Shanghai manufacturing facility prior to Pacific transit.
Detailed anti-scalant dosing regimes, chemical cleaning (CIP) intervals guaranteed against feed water chemistry, and verifiable membrane lifecycle guarantees minimizing total cost of ownership (TCO).
National High-Tech Enterprise pedigree backing international deliveries to North America, Central Asia, and the Middle East.
How Tongjie integrates oil removal, chemical conditioning, high-pressure membrane concentration, and crystallization into a resilient zero-discharge ecosystem.
Separation of free, dispersed, and emulsified petroleum hydrocarbons using corrugated plate interceptors (CPI), micro-bubble dissolved air flotation (DAF), and modified walnut shell deep-bed filters to suppress inlet oil to ≤ 5 mg/L.
Alkaline lime-soda or caustic softening combined with weak acid cation (WAC) resin ion exchangers to precipitate scaling ions (Ca, Mg, Ba, Sr, reactive silica). Crossflow tubular ceramic ultrafiltration strips solids to Silt Density Index (SDI) < 2.5.
Open-channel Disc Tube Reverse Osmosis (DTRO) operates between 75 and 160 bar, overcoming extreme osmotic pressures to elevate brine TDS from 35,000 to over 140,000 mg/L while capturing high-grade permeate for direct process reuse.
Concentrated reject feeds an energy-efficient Mechanical Vapor Recompression falling-film evaporator followed by a forced-circulation crystallizer, recovering 98%+ total system water and discharging solid salts for landfill or chemical recycling.
Serving the San Francisco and Northern California industrial market requires robust maritime logistics management. Equipment manufactured in our ISO-certified Shanghai facility is pre-commissioned, modularized into standard ISO 20ft/40ft high-cube containers, and routed directly through trans-Pacific shipping lanes to the Port of Oakland and Port of San Francisco terminals.
This streamlined maritime logistics pipeline minimizes inland transport delays, enables rapid customs clearing via standardized Harmonized Tariff classifications, and allows seamless on-chassis trucking straight to well sites, chemical complexes, or petro-refinery batteries across Richmond, Rodeo, Martinez, and the Central Valley basin.
Tongjie’s commitment to reliability extends past port delivery. Every skid arrives fully pre-wired, pre-piped, and wet-tested with complete electrical schematics conforming to NEC standards. We support site operations through a hybrid deployment model:
Anticipating the converging requirements of decarbonization, critical material security, and autonomous industrial water management.
Integrating proprietary neural-network algorithms that continuously process real-time trans-membrane pressure (TMP), differential pressure (ΔP), conductivity, and flow transients. The system initiates predictive micro-flushes and pulsed cleaning before irreversible scaling occurs, extending membrane service life by over 30%.
Developing advanced selective membrane trains designed to integrate directly downstream of produced water softening, pre-concentrating lithium ions from 50–200 ppm up to commercial adsorption levels. This turns California's brine liability into an active strategic supply chain for regional gigafactories.
As the San Francisco Bay region anchors Northern California clean hydrogen hubs (ARCHES), our polished DTRO and EDI permeate trains are calibrated to deliver demineralized water exceeding ASTM Type I electrolyzer feed specifications, directly transforming oilfield waste into clean fuels.
Detailed answers addressing specification criteria, regulatory boundaries, and membrane operational dynamics for industrial buyers.
Conventional spiral-wound RO elements utilize narrow feed spacer channels (28–34 mil) that easily choke in the presence of trace free oils, high suspended solids, and scaling salts. Disc Tube Reverse Osmosis (DTRO) utilizes open-channel, radially symmetric flow paths across flat-sheet membrane discs supported by hydraulic plates. This open design eliminates stagnation points, maintains violent crossflow velocity, permits aggressive chemical cleaning across pH 1–13, and tolerates operating pressures up to 160 bar, allowing recovery of brines impossible for spiral elements.
California Title 22 requires complete removal of pathogenic organisms, volatile organics, and trace hydrocarbon contaminants. Our integrated treatment train employs multi-barrier defense: DAF + organoclay filtration, followed by softening, crossflow ceramic UF, multi-pass RO/DTRO, and final advanced oxidation / UV disinfection. Permeate quality consistently achieves Non-Detect (ND) for petroleum hydrocarbons, turbidity < 0.2 NTU, and total nitrogen < 10 mg/L, making it directly eligible for industrial reuse or discharge under regional NPDES permits.
Standard skidded DTRO and containerized ZLD units have an engineering and fabrication lead time of 6 to 10 weeks, depending on automation complexity and metallurgy specifications (e.g., Super Duplex 2507 vs 316L). Direct ocean shipping from Shanghai to the Port of Oakland typically takes 14 to 18 days on water. Prior to shipment, factory acceptance testing (FAT) with hydraulic wet runs is executed and fully documented, ensuring immediate plug-and-play field commissioning upon arrival.
Direct thermal evaporation of high-salinity wastewater typically demands 35 to 65 kWh/m³ of processed water. By utilizing Tongjie’s high-pressure DTRO and Osmosis-Assisted Reverse Osmosis (OARO) membrane pre-concentrators up to 140,000 mg/L TDS, the specific electric power consumption for that fraction drops to only 6.5–11.5 kWh/m³. This shrinks the volumetric load on the downstream thermal crystallizer by 60–80%, delivering massive electrical and carbon-emission savings for California facilities operating under stringent grid tariffs.
Yes. Silica and barium/strontium sulfates represent the most catastrophic scale hazards in membrane treatment. Tongjie integrates chemical pre-treatment leveraging high-pH lime-soda precipitation or seeded crystallization micro-softening. In specialized skids, we utilize weak acid cation (WAC) resin exchangers running in sodium form to strip divalent barium and strontium down to sub-ppm levels, ensuring membranes operate well below scaling saturation thresholds.
Yes. Over 40% of our global shipments are engineered under OEM / ODM agreements for international water treatment conglomerates and EPC engineering contractors. We provide custom P&ID generation, 3D BIM/Revit plant modeling, electrical integration conforming to UL 508A and NFPA 79, customized HMI design with buyer branding, and comprehensive bilingual operation & maintenance documentation.
Supplying the full spectrum of high-salinity brine management, oilfield fracturing flowback remediation, degassing, and ultra-pure water systems to San Francisco and global buyers.
Engineered to concentrate refractory high-TDS wastewater from chemical, refining, and mining facilities prior to thermal evaporation.
Explore Concentrator
Sanitary 316L stainless steel RO+EDI construction meeting USP/EP standards for Bay Area biotechnology and formulation facilities.
Explore Pharma Water
Mobile containerized skid for rapid chemical destabilization, polymer removal, and continuous produced water reuse on drilling sites.
Explore Flowback Unit
Sub-ppb trace ionic and total organic carbon (TOC) polishing loop for wafer cleanrooms, solar PV cells, and advanced lithography.
Explore Ultra-Pure Skid
Fully automated, unmanned-compatible containerized produced water recovery plant achieving complete zero-discharge compliance.
Explore Oilfield ZLD
High-efficiency microporous hollow-fiber contactors stripping dissolved oxygen (DO) and carbon dioxide without chemical scavenging reagents.
Explore Degassing
Heavy-duty marine-grade SWRO units with energy recovery turbines (ERDs) supplying fresh potable and process water for ports and offshore terminals.
Explore SWRO Units
Combines 185nm TOC-reduction UV lamps, electronic grade mixed-bed polishers, and ultrafiltration membranes for stringent high-tech fab specs.
Explore Sub-ppb SystemSubmit your raw produced water analytical lab report (TDS, TOC, oil & grease, scaling ions, temperature, and target recovery rate). Our application specialists will return a detailed mass balance, P&ID layout, and formal CAPEX/OPEX proposal within 24 hours.
