Overview of Reverse Osmosis 　　Reverse osmosis, also known as Reverse Osmosis, is a new membrane separation technology developed in the 1960s. It is a membrane separation and filtration technology that uses pressure difference as a power source. It originated from the research of aerospace technology in the 1960s in the United States and gradually transformed into civilian use. Currently, it has been widely used in scientific research, medicine, food, beverage, seawater desalination and other fields. In the preparation of industrial ultrapure water, such as electronic and power ultrapure water, chemical, electroplating ultrapure water, boiler feed water, and pharmaceutical ultrapure water, it is often used as the first stage treatment for deionization and electrodeionization (EDI). Compared with the traditional pre-treatment process using ion exchange resin, reverse osmosis has the advantages of being more economical, energy-saving, stable in operation, and more reliable in water quality. Moreover, it can greatly extend the regeneration cycle of the second stage ion exchange resin and the cleaning cycle of electrodeionization (EDI). The working principle of reverse osmosis 　　Penetration is a physical phenomenon. When two types of water containing different concentrations of salts are separated by a semi permeable membrane, it is found that the water on the side with less salt content will permeate through the membrane to the water with higher salt content, while the salt content does not permeate. In this way, the salt concentrations on both sides gradually merge until they are equal. This process is called natural infiltration. Reverse osmosis is a separation method that separates solutes and solvents in a solution under pressure, utilizing the selective retention effect of a semi permeable membrane.

Heideneng 4040 reverse osmosis membrane	Dow 8040 reverse osmosis membrane

Composition of reverse osmosis water treatment system

　　Reverse osmosis equipment is a water treatment system organized around a reverse osmosis membrane. A complete reverse osmosis system consists of a pretreatment section, a reverse osmosis host (membrane filtration section), a post-treatment section, and a system cleaning section.

　　1Pre treatment often consists of quartz sand filtration device, activated carbon filtration device, and precision filtration device. The main purpose is to remove harmful substances such as sediment, rust, colloidal substances, suspended solids, pigments, odors, and biochemical organic matter contained in raw water, reduce residual ammonia value and pesticide pollution in water. If the content of calcium and magnesium ions in the raw water is high, it is necessary to add a soft water device, mainly to protect the reverse osmosis membrane in the later stage from damage by large particles, thereby extending the service life of the reverse osmosis membrane.

Shi Yingsha	activated carbon	Softening resin	Fiberglass filter drum	fine filtration

　　IIThe reverse osmosis host is mainly composed of a booster pump, membrane housing, reverse osmosis membrane, control circuit, etc. It is the core part of the entire water treatment system, and the quality of the produced water mainly depends on this part. As long as the membrane model and booster pump model are selected properly, the reverse osmosis host can achieve a filtration capacity of over 99% for salt in water, and the effluent conductivity can be guaranteed to be within 10us/cm (25 degrees). 　　IIIThe post-processing part mainly involves further processing of the pure water produced by the reverse osmosis host. If the subsequent process is connected to ion exchange or electro deionization (EDI) equipment, industrial ultrapure water can be produced. If it is used in civilian direct drinking water processes, it is often connected to a post sterilization device, such as a paper external sterilization lamp or ozone generator, so that the water can be directly consumed. 　　4In order to ensure the normal operation of the reverse osmosis system and extend the service life of the reverse osmosis membrane components, it is necessary to clean the system after a period of operation to remove substances such as calcium carbonate scale, metal oxide scale in water, and biological growth (bacteria, fungi, molds, etc.). When is it necessary to clean? For technical knowledge on how to clean and what chemicals to use for cleaning, please download and refer to the "Data Download" section in the customer service center.

Ultraviolet	Reverse osmosis membrane cleaning agent	ozone generator

Application fields and characteristics of reverse osmosis technology 　　Reverse osmosis membrane separation technology utilizes the principle of reverse osmosis membrane for separation and has the following significant characteristics:
　 ·Under the condition of no phase transition at room temperature, solute and water can be separated, which is suitable for the separation and concentration of thermosensitive substances, and has lower energy consumption compared to separation methods with phase changes.
　 ·The reverse osmosis membrane separation technology has a wide range of impurity removal.
　 ·High desalination rate and water reuse rate, capable of intercepting solutes with a particle size of several nanometers or more.
　 ·By utilizing low pressure as the driving force for membrane separation, the separation device is simple, easy to operate, maintain, and control, and the site is safe and hygienic.
　　Therefore, reverse osmosis water treatment technology has been widely used in industries such as boiler feedwater treatment in power plants, ultra pure water treatment in electronics and semiconductor industries, pure water treatment in chemical and pharmaceutical industries, water treatment in food, beverage, drinking water, desalination of seawater and brackish water, metallurgy, light industry, electroplating, and leather industries.