What is difference between RO and DM plant

Question

Accepted Answer

RO and DM plants are both used for water treatment, but they differ in the process and level of purification.

RO (Reverse Osmosis) plant uses a semi-permeable membrane to remove impurities and contaminants from water.
DM (Demineralization) plant uses ion exchange resins to remove mineral salts and impurities from water.
RO plant is more effective in removing dissolved solids, while DM plant is better at removing mineral salts.
RO plant is commonly used for desalination and producing drinking water, while DM plant is used for industrial applications.
RO plant requires higher pressure for operation compared to DM plant.

Accepted Answer

RO (Reverse Osmosis) and DM (Demineralization) plants are both used for water treatment, but they serve different purposes and use distinct processes:

RO Plant
1. Primary function: Remove dissolved solids, minerals, and other impurities from water using a semi-permeable membrane.
2. Process: Raw water is pressurized and forced through the RO membrane, which filters out impurities, resulting in purified water.
3. *Contaminants removed*: Dissolved solids, minerals, bacteria, viruses, parasites, and other impurities.
4. *Water quality*: Produces water with low TDS (Total Dissolved Solids), typically &lt; 100 ppm.
5. *Applications*: Drinking water, industrial processes, wastewater treatment, and desalination.

DM Plant
1. *Primary function*: Remove dissolved minerals and salts from water using ion exchange resins.
2. *Process*: Raw water passes through a cation exchange resin, which removes positively charged ions, and then through an anion exchange resin, which removes negatively charged ions.
3. *Contaminants removed*: Dissolved minerals, salts, and other inorganic compounds.
4. *Water quality*: Produces water with very low conductivity, typically &lt; 0.1 μS/cm.
5. *Applications*: Power plants, pharmaceuticals, laboratories, and industries requiring ultra-pure water.

Key differences:

- *Purpose*: RO plants focus on removing a wide range of impurities, while DM plants target dissolved minerals and salts.
Process: RO uses a semi-permeable membrane, while DM uses ion exchange resins.
Water quality: RO produces water with low TDS, while DM produces water with very low conductivity.

Accepted Answer

Reverse Osmosis (RO) is used to partially clean-up tap water to make it roughly 90% to 99% pure. Deionization (DI) filters exchange positive hydrogen and negative hydroxyl molecules for positive and negative contaminant molecules in water. DI filtering and other processes are sometimes referred to as "water polishing."

What is difference between RO and DM plant

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