RO (Reverse Osmosis) membrane, is the core component in household and industrial water purification equipment, which effectively removes dissolved solids, bacteria, viruses, organics, and other impurities from water through high-pressure reverse osmosis technology to provide high-quality pure water. However, with the prolonged use of time, RO membrane will gradually accumulate dirt, affecting its filtration efficiency and life. Therefore, it is especially important to clean and maintain the RO membrane on a regular basis.
RO membrane cleaning
After the water purifier has been used for a period of time, the pollutants inside the RO membrane will accumulate more and more, at this time, the RO membrane needs to be cleaned.
Reverse Osmosis membrane cleaning frequency and water quality has a direct relationship, some places water hardness is too large. That is to say, water salts are too high, or water inside the calcium and magnesium and other metal ions are too much, these ions are easy to deposit on the surface of the RO membrane, the formation of clogging. Or is the water inside the microbial content is too high, in the RO membrane above the formation of organic mucous membrane, will also produce clogging.
Ordinary cleaning directly backwash can be. If you want to clean more thoroughly, you need to use a cleaning agent. Cleaning agent is divided into two categories, one is specifically used to clean calcium and magnesium ions, this is specifically for the use of hard water; there is also one is specifically used to clean organic matter. You can mix your own, you can also go online to buy ready-made.
Cleaning calcium and magnesium ions, you can use citric acid or hydrochloric acid, citric acid modulation into a 2% solution, (hydrochloric acid modulation for 0.2%) PH value to maintain at 2 ~ 3 or so, remember to use PH test paper to test the PH value before use. It will be able to RO membrane cleaning.
If you are cleaning organic matter, use 0.1% sodium hydroxide plus 0.025% sodium dodecyl sulfate, modulated with purified water, PH value adjusted to about 11~12.
Attention is needed when cleaning. Only one solution can be used at a time, not two solutions at the same time. Mixed use will not only not have any effect, but will also cause irreversible damage to the RO membrane. If you want to use both solvents, then first clean the calcium and magnesium ions with a solution to clean once, generally two small time or so; cleaning is completed, rinsed with water, and then rinsed with a solution to clean organic matter. Generally speaking, after these two solutions cleaned, RO membrane water production will have a significant increase.
Of course, if the clogging is too serious, then simply use a booster pump to pump the reagent to the RO membrane shell inside, soak for two hours and then clean. After the cleaning is completed, the membrane with clean water.
RO membrane specifications
Water purifier RO membrane specifications from 50G to 400G size varies, of course, now there seems to be larger, but are rarely used. Like the community inside the 800G water vending machine, with two 400G RO membrane. g means gallons, 50G is the water purifier a day to make 50 gallons of water, divided by 24, equivalent to 7.8 liters of water per hour, a minute 130 ml of water. 50G RO membrane is also relatively small, the size of the equivalent of a glass of white wine. 400G can theoretically make 1514 liters of water a day, a minute can make 1 liter of water, that is, a minute can make 1 liter of water, that is, a minute can make 1 liter of water, that is, a minute can make 1 liter of water. Theoretically, 400G can produce 1514 liters of water a day, 1 minute can produce 1 liter of water, that is to say, you can directly use the cup to receive water to drink, do not need to install a pressure bucket to the water purifier, the size of 400G RO membrane is equivalent to the size of the supermarket inside the 1.5L bottle of purified water.
The Frizzlife PD400 utilizes a composite pre-filter and RO membrane with a maximum filtration accuracy of 0.0001 microns. The PD400 under-sink reverse osmosis water filtration system introduces a 5-stage deep filtration mechanism that eliminates more than 1,000 harmful contaminants from the water (99.99%) including lead, chlorine, fluoride, heavy metals, chloramines, VOCs, TDS, scale, arsenic and asbestos, amongst others. RO water filtration systems have a drain ratio as low as 1.5:1 (pure water: drain), saving up to 450% of water compared to conventional systems (1:3). With a capacity of up to 400 gallons per day, the Tankless RO Water Filtration System delivers instantly fresh, pure water to supplied lead-free faucets, filling a glass of water in less than 12 seconds.
RO membrane shell configuration and wastewater ratio configuration of the problem
50G to 100G RO membrane are relatively small, with the usual 1812 type of membrane shell; 200G and 300G usually use 3012 type of mold shell, 400G usually use 3013 type of mold shell.
RO membrane wastewater ratio configuration is usually more than 1 to 2. Although many water filter companies claim that their water filters have a 1 to 1 wastewater ratio, this is not the case.
50 gallons with 300CC wastewater ratio; 75 gallons with 350CC wastewater ratio; 100 gallons with 400CC wastewater ratio; 150 gallons with 500-600CC wastewater ratio; 200 gallons with 600-800CC wastewater ratio; 400 gallons with 1200-1600CC wastewater ratio
Of course, according to the water quality, if the water quality is good, then you can adjust the wastewater ratio lower, but the wastewater ratio is too low will affect the service life of the RO membrane.
The service life of RO membrane
The service life of RO membrane is related to many factors, such as the amount of water used at home, water quality, of course, the main factor is the quality of RO membrane. General 5 mouth family, municipal tap water, for example, with a two years is no problem at all. If you usually also do cleaning and maintenance and so on, the use of time is even longer. Generally speaking, if you feel that your home water purifier makes water for a significantly longer time than before, and there is a significant decline in taste, then you should replace the RO membrane.
Contaminants that RO membrane can filter
The filtration precision of RO membrane is 0.0001 micron, and nowadays, with advanced technology, any harmful substances inside the water can be found out. According to understand, now the main harmful substances in the water are trichloromethane, heavy metals, rust and sediment, bacteria and viruses. Trichloromethane is the residual chlorine produced a chemical reaction, the diameter of 2 to 5 microns. Heavy metals are mainly lead, mercury, etc., directly in 0.05 microns. The diameter of the rust sediment is relatively large. Ordinary are more than 10 microns, with eyes can see, if the rust sediment is too much, then it is best to install a front. In addition, there are some is the water inside the bacterial virus, these are relatively small, the diameter of 0.01 micron to 0.1 micron size varies. Some other calcium and magnesium ions, although not very harmful to people, but also easy to deposit in the body, the formation of stone disease. Diameter are in 0.05 microns or so.
RO membrane pore size is only 0.0001 microns. According to the above pollutant size diameter can be known, RO membrane diameter than the tiniest germs are 200 times smaller, so the water through the RO membrane are very pure.