FAQ about Water treatment plant

1) What are the pretreatment equipment?

Pretreatment equipment includes: mechanical filter, high-efficiency fiber filter, activated carbon filter, precision filter, ultrafiltration, microfiltration, sodium ion softener, iron and manganese removal filter, dosing device, raw water tank, aeration tank .

2) How is the mechanical filter selected?

The selection of the mechanical filter is based on the total water intake of the system to select the size and combination of the filter.

3) How is the cartridge filter selected?

The selection of the precision filter is matched with the total water intake, and the diameter of the precision filter is selected according to the total water intake.

4) How to remove the high concentration of iron and manganese in raw water?

The iron in groundwater is generally ferrous, so ferrous ferrous must be oxidized to ferric. The oxidation process is completed by aeration. The aeration device fully contacts water with oxygen to produce natural oxidation; aeration The degassed water is then passed through a manganese sand filter to remove iron and manganese.

5) Why do some water types have to add a carbon dioxide remover after passing through the cation exchanger?

As a result of the exchange of metal ions in the water with the H+ ions on the cation resin, the H+ ions enter the water, so the effluent from the cation exchanger is slightly acidic, and most of the HCO3- in the water is converted into H2CO3 and further converted into CO2 gas. The solubility of the gas is low. First, it provides good conditions for degassing. Second, if degassing is not performed, H2CO3 will be exchanged with anion exchange resin, which increases the burden on the anion exchanger and shortens the output of the anion exchanger. water cycle.

6) What is the phenomenon of water hammer?

"Water hammer" is due to the air mixed in the pressure vessel, and no necessary means are used to remove the air in the vessel when the device is started, so that the high-pressure water flow mixed with the air will produce violent vibrations when moving into the vessel. The shattering of the membrane element will bring irrecoverable loss.

7) Why must the reverse osmosis concentrated water discharge pipe be a little higher than the reverse osmosis equipment?

The concentrated water discharge valve is always open during reverse osmosis operation, so that when the reverse osmosis device stops operating, if the highest point of the discharge pipe is lower than the highest point of the pressure vessel, a "siphon" phenomenon will occur, and the water in the pressure vessel will Due to its own weight, it will flow out of the reverse osmosis device through the concentrated water discharge pipe, and air will be mixed in the pressure vessel. First, it will easily cause water hammer. Less oxidation will affect the service life of membrane elements.

8) What are the features of UV sterilizer?

- Ultraviolet sterilization is fast, efficient and effective.

- Ultraviolet radiation will not change the physical and chemical properties of water, and will not bring pollution to pure water such as additives.

- Small size, light weight, low power consumption, long life

9) What are the characteristics of the ozone sterilizer?

Answer: Ozone is one of the most effective bactericides in water treatment. Only free chlorine can compare with the bactericidal ability of ozone. The advantage of ozone disinfection is its high bactericidal efficiency, even for highly resistant microorganisms such as viruses and cysts, it is by far the most effective disinfectant. It reduces the smell, taste and color of the feed water, and when it decomposes the only thing left is dissolved oxygen. In addition, the bactericidal ability of ozone is not affected by pH changes and ammonia.

Disinfection with ozone also has a disadvantage, because it must use electricity to generate ozone, and it cannot be stored. When encountering changes in water quality and water quantity, it is difficult to adjust the amount of ozone required in time. Experience has proved that ozone is most suitable for water plants with low water consumption and stable water consumption; in addition, although ozone is a strong oxidant, its oxidizing ability is selective, and it does not generally produce oxidation. Substances that are easily oxidized like ethanol are It is not easy to interact with ozone.

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