Why can't tap water be drunk directly? Can the water purifier be purified for drinking?
Update time: 23-05-06 Views: 481
Why can't tap water be drunk directly? Can the water purifier be purified for drinking?
By Zhao from Onlyzone,a manufacturer of water treatment bio ceramic ball filter media in China
Why can't tap water be drunk directly?
1. The problem of residual chlorine in tap water
Throughout the history of tap water treatment in the world, whether it is the current European water treatment process or the traditional water process born in Belgium in 1902. The general process of tap water treatment process is: raw water→passing through waterworks→through sedimentation (removal of algae and sediment)→filtration (removal of large particles)→chlorination (sterilization)→finally enters the home through tap water pipes.
This technology uses chlorine gas, or chloride, to disinfect water and ozone to deodorize it.
To sum up, tap water may contain residual chlorine, which is one of the reasons why tap water is not suitable for drinking directly.
2. Risk of organic compounds and heavy metal pollution in tap water
Why can't tap water be drunk directly? The water treatment method of chlorination disinfection can kill bacteria, viruses and microorganisms in water, but it cannot filter out organic matter, compounds and heavy metals dissolved in water. On the contrary, residual chlorine will react with some compounds in water to form More harmful chlorinated compounds.
3. Risk of secondary pollution of tap water pipelines
Why can't tap water be drunk directly? In the process of tap water transportation, most of the water pipes used in the early days were galvanized pipes or steel pipes. This is especially common in some old urban areas. After aging, the water pipes are prone to rust and lead to high lead content, especially in places with welding, which will cause secondary damage to tap water. pollute. Although the country now stipulates that tap water pipes need to use PP materials, it is still difficult to replace all water pipes in a timely manner in terms of our own actual situation. On the other hand, due to the long-term use of the pipeline without replacement, the inner wall will absorb a large number of tiny particles, which will also cause secondary pollution of tap water.
4. Penetration of tap water pipes is also a big culprit
my country's water pipeline network has a leakage ratio of 40%-50%. Once the power is cut off and the water is cut off, the water pipe will become negative pressure and suck back. At this time, the dirty water impurities on the surface will seep into the damaged place If there are hospitals, farms, garbage dumps, sewage pools, etc. around the damaged pipe, the harm caused is even more unpredictable.
5. Pollution of tap water sources
The causes of water source pollution include illegal sewage discharge from factories, vehicle exhaust and aquaculture, excessive pesticides and domestic sewage, etc., all of which will lead to problems in water sources.
What should I do if the tap water cannot be drunk directly?
These two methods are usually used in real life to solve: one is to drink after boiling; the other is to use a water purifier to purify and drink.
Boiled
In fact, it is very simple, as long as the tap water is boiled, it can be drunk, because most of the tap water is sterilized by chlorine gas, but this does not make the sanitary index of tap water meet the drinking water standard, there will still be more harmful substances in the water, boiling can basically kill or reduce these substances. At the same time, there will be chlorine gas and other harmful chloride residues in tap water sterilized by chlorine gas. After boiling, most of these harmful substances can be decomposed or volatilized, which greatly improves the safety factor of water.
Water purifier purification
The working principle of a general water purifier is to filter. After filtering layer by layer, the sediment, rust, impurities, residual chlorine, bacteria, viruses, carcinogenic organic substances, heavy metals, etc. in the tap water are filtered out to achieve the purpose of purification.
Of course, different water purifiers of different quality and quality may not be able to achieve 100% purification. Therefore, for the purified tap water, it is best for consumers to boil the double-guaranteed drinking to be more at ease.
