Common mistakes made in the operation and installation of RO system
The technology of reverse osmosis has evolved into a commonly used water purification process. Over long periods of time, well-designed and correctly run systems provide trouble-free functioning. These system membranes have a lengthy usable life. Mistakes committed during the design or operation of reverse osmosis systems, on the other hand, might result in long-term issues and lower membrane life.Making needless assumptions and overlooking the minor details that make all the difference is the most typical mistake made while planning any water treatment facility. A reverse osmosis (RO) plant must be properly constructed for the feed water, and any RO system is only as good as its pre-treatment, as the adage goes.
COMMON MISTAKES MADE-
1. FEED WATER
When establishing a Reverse Osmosis plant, it is critical to do a thorough examination of the feed water quality as well as the planned plant's operating parameters. To develop high RO performance, critical variables should be considered when establishing a Reverse Osmosis plant.
2. TEMPERATURE OF FEED WATER
The volume and quality of treated water from a commercial RO plant can vary greatly depending on the temperature of the feed water entering into the plant, which is something to bear in mind if you plan to build a RO plant in one of the world's warmest climates. In some circumstances, cooling the water before putting the reverse osmosis membranes in place is necessary. It's a good idea to run membrane simulations at different temperatures to make sure the plant will meet your needs.
3. CHLORINE (Cl2)
Because chlorine can harm RO membranes, it's important to know if your raw water includes it. If you're treating scheme or potable water for a high purity application, chlorine will almost probably need to be eliminated before the RO membranes are installed. Chlorine can be eliminated from chlorinated water by filtering it via activated carbon or administering an antioxidant. Prior to the RO membranes, it's always a good idea to install a chlorine analyzer ORP meter, which will shut down the plant if any chlorine gets past the pre-treatment, preventing damage to the membranes.
4. IRON
RO membranes are also harmed and blocked by iron in the input water. Many RO units have been erected to treat bore water, which can contain a lot of iron. Before the RO is installed, it is critical to check the iron content. Depending on how much iron is present, pre-treatment procedures such as aeration and filtration or DMI filtering can be used to remove it.
5. FEED WATER HARDNESS
Other types of industrial water filter systems are used to remove excess 'hardness' (usually calcium and magnesium), which can cause plumbing scaling and other undesirable effects. Anti-scalents can be dosed to reduce calcium and magnesium scaling, or softening procedures such as Ion Exchange, which replaces calcium and magnesium ions with sodium ions, or Nano Filtration can be used (NF). If this is not the case, the RO membranes will become fouled quickly, lowering recovery rates.
6. FILTRATION BEFORE RO
Filtration is widely used to remove suspended materials from raw water prior to desalination using reverse osmosis (RO). The amount of suspended solids in the feedwater, as well as the turbidity and silt density index, will determine the type of pre-filtration required. Multimedia Filtration (MMF), Ultra Filtration (UF), and cartridge filtration are common RO pre-treatment technologies.
7. MEMBRANE SERVICES / CIP CLEANING
Many RO units are installed without the ability to clean the membranes in order to save money. This can be a waste of money because customers frequently have to replace RO membranes. Membrane fouling is unavoidable, even with the finest quality inflow water, therefore proper cleaning and monitoring are essential. The membranes will be cleaned without being damaged if the CIP method is efficient. The velocity of the CIP solution across the reverse osmosis membranes, the chemicals utilized, and the temperature will all affect the CIP's performance.
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