Professional Terms of Chemical Water Treatment
- Dissolved matter: exists in water (or other solvent) solution in the form of simple molecules or ions. The particle size is usually only a few tenths to a few nanometers, which is invisible to the naked eye, and there is no Tyndall phenomenon. It cannot be seen with an optical microscope.
- Colloid: a cluster of several molecules or ions combined together, usually in the size of tens of nanometers to tens of microns, invisible to the naked eye, but Tyndall phenomenon occurs. Small colloidal particles cannot be seen with an optical microscope, but large ones can be seen.
- Suspended matter: It is a small particle that is visible to the naked eye formed by a large number of molecules or ions. The size is usually more than tens of microns. It can be clearly seen with an optical microscope. The suspended matter particles can settle for a long time.
- Total dissolved solids: TDS, the unit of measurement is milligrams per liter (mg/L), which indicates how many milligrams of dissolved solids are dissolved in 1 liter of water.
- Turbidity: it is a water quality substitute parameter used to reflect the content of suspended solids in water. The main suspended matter in the water is generally soil. 1L distilled water contains 1mg silica as the unit of standard turbidity, expressed as 1PPm.
- Pure water: refers to the strong and weak electrolytes in the water (such as SiO2, CO2, etc.). Remove or reduce the water to a certain level. The electrical conductivity is generally 1.0-0.1μs/cm, and the resistivity is 1.0--1000000Ω.cm.
The salt content is less than 1mg/l.
- Microfiltration: MF which belongs to precision filtration. Microfiltration can filter out micron or nanometer particles and bacteria in the solution.
- Ultrafiltration: UF one of the membrane separation technologies with pressure as the driving force. For the purpose of separating macromolecules from small molecules, the pore size of the membrane is between 20-1000A°.
- Nanofiltration: NF is a pressure-driven membrane separation process between reverse osmosis and ultrafiltration. The pore size range of nanofiltration membranes is about a few nanometers.
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