1, Raw water:
Refers to the natural water without any treatment or the city’s tap water is also called raw water.
2, Clarified water:
Removal of suspended water from raw water.
3, In addition to salt water:
Refers to the water in the sun, the anion is basically removed or reduced to a certain degree of water called desalted water. Desalting methods are distillation, electrodialysis, reverse osmosis, ion exchange and so on.
4, Flocculant:
Can cause colloidal particles to produce condensation and the role of flocculation agent.
5, The total alkalinity:
Refers to the amount of substances in the water that can neutralize the strong acid.
6, Acidity:
Refers to the amount of water that can react with the strong base.
7, Hardness:
Refers to the water is easy to form some of the precipitation of metal ions, usually refers to calcium and magnesium ion content.
8, Turbidity:
Refers to the degree of water turbidity, it is due to the water contains a certain amount of suspended solids (including colloidal substances) produced by the optical effect. The unit is represented by NTU. Turbidity is one of the main features in the appearance of whether or not the water is contaminated. Turbidity standard unit is defined as 1mgSi02 formed by the turbidity of 1 degree.
9, Conductivity:
Is a certain temperature, the cross-sectional area of 1 square centimeters, separated by 1 cm between the two parallel electrodes of the conductivity of the solution. Can indirectly indicate the dissolved salt content of water.
10, Resistivity:
It is also an indicator of the conductivity of water, the greater the resistivity of water, the worse the water conductivity, the less ions in the water. Its common unit is MΩ.CM. It is reciprocal relationship with conductivity. For example, the conductivity of water is 0.2μs / cm, then its resistivity is: 1 / 0.2 = 5 (MΩ.CM).
11, TDS (total dissolved solids):
Is the residual inorganic matter that removes the suspended matter (SS) from the colloid and evaporates to see all the water. The unit is ppm or mg / l, which can be measured with a TDS meter. It also reflects the ion content in water. It has a rough correspondence between the conductivity and the conductivity: for the sodium chloride reference solution, the 1 ppm TDS value corresponds to a conductivity of 2 μs / cm.
12, PH:
The relative content of acid and base in the solution. The pH is a measure of the negative logarithm (log) of the hydrogen ion concentration in the water. PH value is 0 ~ 14 block, pH 7.0 is neutral; pH is less than 7.0, then the water is acidic; pH value is greater than 7.0. Then the water is alkaline.
13, Alkalinity:
Alkalinity refers to the ability of the water to accept [H +] ions and strong acid to neutralize the reaction of the material content. The alkalinity of the substance in the water is mainly the carbonate alkalinity produced by the carbonate and the alkalinity of the bicarbonate produced by the bicarbonate, and the hydroxide alkalinity produced by the presence of the hydroxide.
14, SDI:
Pollution index – used to measure the amount of suspended solids in raw water used in reverse osmosis systems.
15, Ozone:
An unstable, highly active form of oxygen, which is produced by natural lightning or high pressure charge through the air, is an excellent oxidizing agent and disinfectant.
