Ultrafiltration and reverse osmosis combined equipment is the most mainstream two-stage membrane separation system for preparing industrial pure water, demineralized water and reclaimed reuse water in global manufacturing industries. As a professional manufacturer with independent workshop production capability for complete sets of water treatment devices, Xinxiang Lifeierte Filter Corp., Ltd delivers integrated industrial liquid filter solutions equipped with supporting Industrial Skid Mounted Ultrafiltration Equipment, anti-pollution Tubular Ultrafiltration Membrane, all-in-one Integrated Ultrafiltration Water Purification Equipment and intelligent Automatic Ultrafiltration Machine to match the pretreatment demand of reverse osmosis modules in different water quality and flow conditions. This paper comprehensively analyzes the structural composition, collaborative operation mechanism, standardized technical indicators, strict factory quality inspection standards and multi-industry application values of UF + RO combined equipment, helping overseas engineering purchasers configure matched membrane systems to stabilize produced water quality, reduce membrane replacement loss and cut the overall operation cost of enterprise water treatment stations.
Ultrafiltration and Reverse Osmosis Equipment for Industrial Water Purification
Ultrafiltration and reverse osmosis combined equipment is the most mainstream two-stage membrane separation system for preparing industrial pure water, demineralized water and reclaimed reuse water in global manufacturing industries. As a professional manufacturer with independent workshop production capability for complete sets of water treatment devices, Xinxiang Lifeierte Filter Corp., Ltd delivers integrated industrial liquid filter solutions equipped with supporting Industrial Skid Mounted Ultrafiltration Equipment, anti-pollution Tubular Ultrafiltration Membrane, all-in-one Integrated Ultrafiltration Water Purification Equipment and intelligent Automatic Ultrafiltration Machine to match the pretreatment demand of reverse osmosis modules in different water quality and flow conditions. This paper comprehensively analyzes the structural composition, collaborative operation mechanism, standardized technical indicators, strict factory quality inspection standards and multi-industry application values of UF + RO combined equipment, helping overseas engineering purchasers configure matched membrane systems to stabilize produced water quality, reduce membrane replacement loss and cut the overall operation cost of enterprise water treatment stations.
The ultrafiltration-reverse osmosis combined system adopts a classic front UF pretreatment + rear RO deep desalination layout, which solves the two core pain points of raw water turbidity pollution and ion over-standard in industrial water production. Ultrafiltration unit intercepts suspended solids, colloids, bacteria, macromolecular organics and particulate impurities in raw water, greatly lowering the SDI pollution index of inlet water for reverse osmosis membranes and avoiding irreversible fouling and scratch damage of expensive RO membrane elements. Reverse osmosis relies on high-pressure osmosis interception to remove calcium magnesium hardness, chloride ions, heavy metal ions and soluble salts, finally reaching the pure water standard required by production lines.
Our combined UF & RO equipment is an integrated skid-mounted design, integrating ultrafiltration membrane module, RO membrane stack, raw water pump, high-pressure RO pump, security filter, automatic backwashing device, chemical cleaning dosing system and PLC centralized control cabinet on one integral frame.
For conventional factory pure water preparation projects, customers can select standardized Industrial Skid Mounted Ultrafiltration Equipment as the pretreatment front end of the RO system; the unified skid structure realizes centralized layout and convenient on-site installation. For printing and dyeing, chemical and other heavily polluted wastewater reuse projects, anti-blocking Tubular Ultrafiltration Membrane is matched for the UF section, coping with high turbidity and high impurity wastewater stably for a long time. For small and medium-sized factories with limited installation space, the compact Integrated Ultrafiltration Water Purification Equipment is perfectly combined with small RO assemblies to realize plug-and-play after water and electricity access. For large-scale continuous water supply workshops, the intelligent Automatic Ultrafiltration Machine supports linkage operation with the reverse osmosis host, automatically adjusting flushing frequency and operating pressure according to real-time water quality data.
The UF membrane is modified PVDF material with strong antifouling performance; RO membrane adopts imported polyamide composite desalination membrane. All pipelines and frames use 304 stainless steel as standard material, and 316L corrosion-resistant material is optional for corrosive water quality environments. The whole set of equipment supports full automatic unattended operation, with automatic alarm protection for pressure, flow and liquid level abnormal conditions.
Ultrafiltration is pressure-driven physical sieving filtration with a membrane pore size of 0.01~0.1μm. Raw water enters the ultrafiltration membrane under low pressure of 1.0–3.6 bar. Water molecules and small soluble substances pass through the membrane to form permeate water; particulate pollutants are trapped on the membrane surface. The system executes regular cross-flow scouring, automatic backwashing and periodic chemical cleaning to discharge intercepted dirt, and the qualified UF produced water flows into the security filter to supply water for the reverse osmosis system. The core function of UF is to control the inlet water SDI value of RO below 5, greatly extending the service life of reverse osmosis membranes.
Reverse osmosis membrane pore size is only 0.0001~0.001μm. After ultrafiltration pretreatment, the water is pressurized to 10–16 MPa by the high-pressure pump and flows along the surface of the RO membrane. Under high pressure, water molecules pass through the RO membrane layer, while various inorganic salts, metal ions, residual organic matter and microorganisms are intercepted in the concentrated water side to be discharged. RO realizes deep desalination and water softening, outputting qualified industrial pure water.
The PLC control system synchronizes the operation status of the two units. When the ultrafiltration transmembrane pressure difference rises to the set value, the system will automatically reduce the RO water production flow temporarily to complete UF cleaning; when the RO concentrated water conductivity exceeds the standard, the UF unit will automatically strengthen the backwashing procedure to stabilize inlet water quality. The two units cooperate closely to ensure the long-term stable operation of the whole water making system.
Membrane material: Modified antifouling PVDF hollow fiber / tubular membrane
Operating pressure: 1.0 ~ 3.6 bar; Working temperature: 5 ~ 45℃
Applicable pH: Continuous operation 2–11, cleaning tolerance 1–13
Effluent SDI ≤5; Water recovery rate: 80% ~ 90%
Membrane type: Polyamide composite spiral wound RO membrane
Operating pressure: 1.0 ~ 1.6 MPa; Desalination rate of single membrane ≥99%
Working temperature range: 5 ~ 40℃; pH application range 3 ~ 10
System pure water recovery rate: 70% ~ 80%
Control mode: Touch screen + PLC automatic linkage control
Automatic functions: Timed backwash, automatic CIP cleaning, fault alarm, data real-time recording
Customized single set water production capacity: 0.5t/h ~ 500t/h optional
All ultrafiltration and reverse osmosis combined equipment strictly abides by ISO9001 quality management system and CE international certification standards in the whole production process.
Incoming material inspection: UF membranes, RO membrane elements, stainless steel accessories, pumps, valves and electrical components are sampled and tested before warehousing to block unqualified raw materials at the source.
Assembly process supervision: Frame welding, pipeline installation, membrane assembly and electrical wiring are tracked by special inspectors with complete quality files for each process.
Factory overall debugging: Each complete set of equipment passes water pressure tightness test, 72-hour linkage operation simulation test and automatic program calibration before delivery to eliminate hidden operation troubles.
Export-grade packaging: Moisture-proof, shock-proof and rust-proof packaging is adopted for overseas sea transportation to avoid damage during long-distance logistics.
With standardized maintenance, the service life of ultrafiltration membrane is 5–8 years, and reverse osmosis membrane can run stably for 3–5 years. We provide global spare parts supply and lifelong free remote technical after-sales service for all customers.
Electronic semiconductor industry: Produce high-purity deionized water for chip cleaning and electronic component production
Food and beverage industry: Prepare pure water for beverage blending, mineral water filling and food processing
Pharmaceutical industry: Produce purified water for pharmaceutical preparation, cleaning and production process
Boiler feed water treatment: Remove water hardness to prevent boiler scaling and improve boiler operation safety
Industrial wastewater reuse: Treat factory wastewater after biochemical treatment to reach the standard of circulating cooling water reuse
Cosmetic daily chemical industry: Provide low-ion pure water for raw material preparation and product configuration
Q1: Why must reverse osmosis equipment be matched with ultrafiltration as pretreatment?
A: Raw water contains a large amount of suspended solids and colloids. Direct access to RO will cause rapid membrane fouling and irreversible damage. Ultrafiltration can effectively intercept pollutants and stabilize RO inlet water quality, greatly prolonging RO membrane service life.
Q2: Can ultrafiltration and reverse osmosis equipment operate automatically 24 hours a day?
A: Yes. The supporting PLC linkage program realizes full-automatic water production, backwashing and cleaning without full-time manual duty, and only regular daily patrol inspection is required.
Q3: What is the difference in maintenance cycles between ultrafiltration and reverse osmosis membranes?
A: Ultrafiltration conventional chemical cleaning cycle is 1–3 months; reverse osmosis membrane cleaning cycle is 3–6 months under normal operating conditions.
Q4: Will you provide complete English technical documents for exported integrated equipment?
A: Each exported equipment is equipped with English operation manual, P&ID flow chart, electrical schematic diagram and operation video to support customer commissioning and daily operation management.
Q5: What is the warranty scope of the complete UF+RO equipment?
A: Equipment frame, pump valves and control system enjoy 1-year free warranty; UF and RO membranes are consumables without warranty, and we supply replacement membranes at factory cost price permanently.
Q6: Can the water production capacity of UF and RO be customized according to customer demand?
A: Fully customizable. Our technical team designs the matching flow rate of ultrafiltration pretreatment and reverse osmosis main unit according to customer actual water consumption, raw water quality and effluent index requirements.
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