1 / 4
OEM High-Pressure DTRO&STRO Membrane Concentration System from China Suppliers and Factory for Wastewater Treatment Supplier, Manufacturer
Product Description
Our Solution
Shanghai Tongjie Environmental Protection's high-salt wastewater reduction and resource recovery system employs a combined process of OARO (Optical Advanced Reverse Osmosis) for high-salt concentration, DTRO (Dialysis-Treated Reverse Osmosis) for high-pressure reverse osmosis, and MVR (Membrane Vapor Recovery) for evaporation and crystallization. The raw water has a TDS concentration of 10,000–50,000 ppm, which is concentrated to over 150,000 ppm TDS, achieving zero wastewater discharge and salt resource recovery.
Adapted for: High-salt industries such as chemical engineering, electroplating, lithium salts, coal chemical industry, pharmaceuticals, and printing and dyeing.
Adapted for: High-salt industries such as chemical engineering, electroplating, lithium salts, coal chemical industry, pharmaceuticals, and printing and dyeing.
Core Advantages
When wastewater TDS exceeds tens of thousands mg/L and COD remains high, conventional reverse osmosis membrane elements quickly fail due to concentration polarization and membrane fouling. System recovery drops sharply, cleaning cycles shorten to just a few days, and evaporation/crystallization costs remain prohibitive.
DTRO (Disc-Tube Reverse Osmosis) and STRO (Spiral Tube Reverse Osmosis) are specialized high-pressure membrane technologies engineered for extreme conditions. Both share open-channel flow path designs and high-pressure operation capabilities, achieving high-ratio concentration and stable permeate production that conventional membranes cannot reach.
Standard Process Flow
⚙️
DTRO system flow: Raw water → Pretreatment (sand filter/UF) → Primary DTRO membrane modules → Recirculation → Permeate → UV disinfection → Reuse/discharge; Concentrate → Secondary DTRO → Evaporation/crystallization or resource recovery.
⚙️
STRO system flow: Raw water → Softening/UF → Primary RO concentration → Secondary RO concentration → STRO superconcentration → Permeate reuse → High-density brine → Evaporation/crystallization.
Application Scenarios
◈
Landfill Leachate Full Treatment: DTRO’s 3.0 mm wide channel design allows high turbidity feed to pass without clogging, maintaining stable flux for up to 12 months.
◈
Coal Chemical & Coking Wastewater ZLD: STRO concentrates TDS up to 80,000 mg/L, cutting operating costs by 60% compared to traditional evaporation.
◈
Power Plant & Cooling Tower: Directly treats high hardness and salinity wastewater without softening, offering superior stability.
◈
Electroplating & Pharmaceutical: Recovers valuable salts like sodium chloride and sodium sulfate as industrial-grade by-products.
◈
Steel & Non-Ferrous Metals: Nanofiltration separation recovers valuable metal ions from concentrated brine.
◈
Oil & Gas Produced Water: Significantly reduces off-site disposal costs by high-ratio volume reduction.
◈
Marine / Island Desalination: Compact modular STRO units suitable for offshore platforms and vessels.
Other Products
Modular Containerized Seawater...
High-Salinity Wastewater Volume...
OEM Precision Manufacturing
ODM Full Value Chain Innovation
Send Inquiry
Frequently Asked Questions
What level of salt concentration can the DTRO/STRO system handle?
Our system typically treats raw water with TDS concentrations of 10,000–50,000 ppm and can concentrate it to over 150,000 ppm TDS for zero liquid discharge (ZLD) processes.
Why use DTRO instead of conventional RO membranes?
Conventional RO membranes often fail due to scaling and fouling in high-salt/high-COD environments. DTRO features an open-channel design that prevents clogging and maintains stable operation under extreme conditions.
Which industries are best suited for this wastewater recovery system?
It is ideal for landfill leachate treatment, coal chemicals, electroplating, power plant desulfurization, pharmaceuticals, and oil/gas produced water treatment.
Does the system help in recovering valuable resources?
Yes. Beyond water reuse, the system can separate and recover industrial-grade salts like sodium chloride and sodium sulfate, as well as valuable metal ions from concentrated brine.
How does the system reduce operational costs?
By achieving high-ratio concentration through STRO/DTRO membranes, the load on downstream evaporation and crystallization is significantly reduced, cutting energy consumption by up to 60%.
Is the system suitable for offshore or remote locations?
Yes, our STRO systems feature a compact, modular design that is perfect for marine desalination, offshore platforms, and small island water supply units.
