Reverse osmosis is a membrane separation operation that uses pressure difference as a driving force to separate solvents from a solution. By applying pressure to the feed solution on one side of the membrane, water flows from the higher concentration side of the RO membrane to the lower concentration side, thereby separating fresh water from saline water. The filtered fresh water is called permeate water. The remaining concentrated water is called waste or saline water. Salt will be left behind, only clean water will flow through.

How does reverse osmosis work?

The working principle of the reverse osmosis system is to apply pressure to unfiltered water under the action of a high-pressure pump to obtain pure water, forcing the water to pass through the reverse osmosis membrane, filtering out almost all dissolved salts and other substances.

The reverse osmosis water treatment equipment uses sufficient pressure to separate the solvent in the solution through the reverse osmosis membrane in the opposite direction to the osmosis direction. The reverse osmosis method greater than osmotic pressure can be used to separate, purify and concentrate the solution. The reverse osmosis technology can effectively remove impurities such as dissolved salts, colloids, bacteria, viruses, bacterial endotoxin and most organic substances in the water, The main separation object of reverse osmosis membranes is the ion range in the solution, which can effectively remove salt from water without the need for chemicals. The desalination rate of the system is generally above 98%. So reverse osmosis technology is advanced, energy-saving, and environmentally friendly desalination method, and has become the mainstream pre desalination process.

Advantages of reverse osmosis

Due to the fact that RO reverse osmosis equipment does not require heating, consumes less energy, operates continuously and stably, has a small volume, simple operation, strong adaptability, and does not pollute the working environment, it has gradually replaced traditional ion exchange processes in the current field of water treatment equipment. The RO membrane components in RO reverse osmosis equipment use imported famous brand products, which not only have advanced technology, but also reliable product quality and strong scalability, Reasonable structure and small footprint, achieving a good balance between water utilization and product life, low energy consumption, fully automatic operation, and simple operation and maintenance.

The function of a water purifier is to purify tap water, intercepting sediment, rust, bacteria, viruses, heavy metals, etc. from the tap water, ensuring the health of household water and preventing water pollution.
We all know that masks have a limited lifespan and need to be replaced regularly, usually every 2 to 4 hours, otherwise they will not have a protective effect.
The most critical functional component of a water purifier is the filter element. Each water purifier has multiple filter elements that play different roles in filtering and treating water quality separately. Even if the filter element expires, it should be replaced in a timely manner!

What are the hazards of not replacing in a timely manner?

The filter element of the water purifier has not been replaced upon expiration, resulting in a weakened filtration effect and an inability to guarantee water quality. The sensitivity of mineral water inlet becomes worse, and the presence of sediment in the water is possible. Not replacing the filter element means that the water purifier cannot filter properly, and harmful impurities such as bacteria and viruses can accumulate inside. The water purifier has been in an overloaded working state, causing significant damage to the machine itself and affecting its lifespan. Here, we remind everyone to replace the filter cartridge in a timely manner when its lifespan expires!

The filter element replacement cycle is as follows:

Replacing the filter element

PP cotton filter element raw material: melt blown polypropylene, filtration accuracy 1-5 microns Function: effectively filter suspended solids, sediment, rust, colloids and other large particle substances in water Replacement cycle: 3-6 months.
Activated carbon filter element raw material: Coconut shell activated carbon function: adsorb residual chlorine and odors in water, improve the taste of water. The water filtered by activated carbon is sweet and delicious. Replacement cycle: 6-12 months
Raw material for nanofiltration filter cartridge: imported from the United States, with a filtration accuracy of 1 nanometer. Function: effectively removes harmful substances such as sediment, rust, colloids, suspended solids, scale, bacteria, antibiotics, heavy metal ions, etc. from water, while retaining some beneficial minerals (sodium ions, potassium ions) for the human body. Purified water can be directly consumed. Replacement cycle: 12-36 months.
RO filter element raw material: RO membrane imported from the United States, with a filtration accuracy of 0.1 nanometers. Function: effectively filters harmful substances such as scale, bacteria, antibiotics, heavy metal ions, and minerals (sodium ions, potassium ions), retaining only water molecules. Replacement cycle: 12-36 months.

How to determine if the filter element needs to be replaced?

water filter

The intelligent era of filter life reminder has arrived, and most water purifiers nowadays have filter life expiration reminders.
The activated carbon filter cartridge plays a role in removing residual chlorine, color and odor, and improving the taste. When its lifespan expires, it will inevitably affect the taste. When the feeling of the purified water outlet deteriorates, it is mostly because the activated carbon filter element needs to be replaced. When the voltage and water pressure are normal, the water outlet speed significantly decreases or there is no water outlet after a period of use. It is highly likely that the nanofiltration membrane is blocked by pollutants, and the automatic flushing function of the filter element cannot function. The water production capacity is no longer sufficient, which also indicates that the filter element has expired and needs to be replaced.

The concept of reverse osmosis

Reverse osmosis is a membrane separation technology developed in the 1960s, which relies on reverse osmosis membranes to separate solvents and solutes in a solution under pressure. It is to use sufficient pressure to separate the solvent (usually water) in the solution through reverse osmosis membrane (a semi permeable membrane). Contrary to the direction of osmosis, reverse osmosis method larger than osmotic pressure can be used to separate, purify and concentrate the solution.The main separation object of reverse osmosis membranes is the ion range in the solution.

The principle of reverse osmosis

Permeation is a physical phenomenon in which a semi permeable membrane is placed between two types of saline water with different concentrations to separate them. The water on the lower concentration side will penetrate through the membrane and penetrate into the water with higher concentration, while the salt content will not penetrate until the salt concentration on both sides is equal. If a pressure is applied on the water side with high salt content, the result can also stop the above seepage, and the pressure at this time is called osmotic pressure.
If the applied pressure is further increased, it can cause water to permeate from the side with high salt content to the side with low salt content, and the salt is intercepted, forming reverse osmosis.
In general, the principle of reverse osmosis is to apply a greater pressure than the natural osmotic pressure in the water containing salt to make the osmosis go in the opposite direction, and press the water molecules in the raw water to the other side of the membrane to obtain pure water that removes salt, microorganisms, organics and other substances. Due to the pore size of the reverse osmosis membrane being only 0.0001 microns, a bacterium needs to be reduced by 4000 times, and a filterable virus needs to be reduced by more than 200 times to pass through, resulting in an effective removal rate of over 96%.

Advantages of reverse osmosis separation

No heating required, no phase change;
Low energy consumption;
The equipment is small in size, easy to operate, and has strong adaptability;
No pollution to the environment.

The Use of Reverse Osmosis Technology

Remove organic matter, bacteria, colloids, and other impurities dissolved in water;
Wastewater treatment and reuse;
As a concentration method, it can recover valuable components dissolved in solution.
Industry suitable for application of reverse osmosis technology
Electric power industry: boiler make-up water;
Electronic industry: ultra pure water for semiconductor industry, integrated circuit cleaning water;
Food industry: formula water, production water;
Beverage industry: formula water, production water, washing water;
Pharmaceutical industry: process water, formulation water, washing water, injection water, drug concentration and separation;
Chemical industry: production water, wastewater treatment, concentration and separation of valuable substances;
Drinking water engineering: pure water preparation, drinking water purification;
Petrochemical industry: advanced treatment of oilfield injection water and petrochemical wastewater;
Seawater desalination: Production and domestic water for island areas, coastal water scarce areas, ships, seawater oil fields, etc.

Due to the efficient and energy-saving advantages of reverse osmosis technology, it has attracted much attention in the water treatment industry. Multiple countries are currently researching and developing reverse osmosis water purification, including many household water users, who are gradually using reverse osmosis water purification to improve their quality of life.