What is a Reverse Osmosis System?
Reverse osmosis systems are advanced purification technologies that eliminate salts, minerals, heavy metals, and dissolved substances by passing water through semi-permeable membranes under high pressure. This method operates on the principle of reversing the natural osmosis process. Therefore, the membrane allows only water molecules to pass while retaining contaminants.
Reverse osmosis systems provide a salt removal rate between 95% and 99.7%. In addition, they effectively remove arsenic, fluoride, nitrate, and heavy metals. It is an indispensable technology, especially in the treatment of groundwater with high mineral content, hard tap water, and seawater.
As a result, reverse osmosis systems are commonly used in drinking water, industrial process water, boiler feed water, and MBR systems for water recovery. Furthermore, when combined with UV disinfection, safe water is obtained from a microbiological perspective as well.
Technical Specifications
- Membrane Type: Polyamide (TFC) spiral wound membrane
- Salt Removal Rate: 95% - 99.7% high selective performance
- Capacity Range: 1 - 1000 m³/hour custom design
- Recovery Rate: 50% - 80% (depending on water source)
- Operating Pressure: 8 - 70 bar (depending on application)
- Body Material: Stainless steel or FRP composite
- Energy Consumption: 1 - 3 kWh/m³ efficient operation
- Automation: PLC + SCADA + remote monitoring
Application Areas
- Drinking Water Facilities: City and municipal water treatment
- Industrial Process Water: Textile, food, pharmaceuticals, chemicals
- Boiler Feed Water: Power plants, steam boilers
- Seawater Treatment: Coastal facilities, ships, hotels
- Well Water Treatment: Hardness, iron, manganese removal
- Wastewater Recovery: Advanced treatment after MBR
- Hotels and Resorts: Supply of drinking and pool water
- Hospitals and Laboratories: Purified water needs
How Does Reverse Osmosis Work?
In the reverse osmosis system, water first goes through the pre-treatment stage. In this stage, coagulation, sand filtration, and cartridge filters are used to remove large particles and suspended solids. Additionally, anti-scalants and chlorine removal chemicals are dosed to protect the membrane.
After pre-treatment, water is compressed by a high-pressure pump and directed to the membrane modules. Under high pressure, only pure water molecules pass through the membrane. Therefore, salts, minerals, and organic pollutants are collected in the concentrate stream. This side stream is referred to as "concentrate" or "brine."
As a result, the pure water (permeate) that passes through the membrane can be used directly or subjected to final treatment with UV disinfection. In modern systems, energy recovery units can reduce electricity consumption by 30-40%.
Advantages of Reverse Osmosis
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Detailed InformationFrequently Asked Questions
Modern reverse osmosis systems provide a salt removal rate between 95-99.7%. The recovery rate varies depending on the water source: a yield of 70-80% is obtained for well water, while for seawater, the yield is 30-50%. When the system is designed correctly, it operates with high performance for years.
The average lifespan of RO membranes is 3-5 years. With proper pre-treatment, periodic chemical cleaning (CIP), and suitable operating conditions, this period can extend up to 7 years. Regular maintenance maximizes membrane life.
Pre-treatment is critical for extending the lifespan of membranes and increasing efficiency. It typically includes stages such as settling, sand filtration, activated carbon filtration, and anti-scalant dosing. Pre-treatment is simpler in RO applications following MBR systems.
Seawater RO systems (SWRO) operate at high pressure (55-70 bar) and use special seawater membranes. The recovery rate is around 40-50%. In modern systems, with energy recovery units, electricity consumption has been reduced to 2.5-3.5 kWh/m³.
Yes, RO is widely used in drinking water production worldwide. However, since it removes all minerals, it is recommended to perform mineral balancing (remineralization) on the output water. This way, the drinking water becomes both safe and nutritious.
The cost of the RO system is calculated specifically for the project based on capacity, the characteristics of the water source (well, municipal, seawater), and the desired quality. In addition, the need for pre-treatment, membrane type, and level of automation affect the cost. For detailed design, contact our expert engineering team.