Drink water scientifically and use drinking water purifiers correctly

my country's drinking water hygiene standards have strict requirements for drinking water. Tap water that meets the drinking water quality standards is safe drinking water and can protect people's health.

With the development of social economy, people have higher demands for drinking water quality, and many families choose to buy drinking water purifiers.

I. Definition

Drinking water quality processors use municipal tap water or other centralized water supply as raw water, and after further treatment, they are designed to improve the quality of drinking water and remove certain harmful substances in the water. ("Sanitary Standards for Drinking Water" (Weifajianfa [2001] No. 161))

2. Classification

Water purifiers are divided into general water quality processors (microfiltration water purifiers, ultrafiltration water purifiers), reverse osmosis water purifiers (nanofiltration water purifiers, reverse osmosis water purifiers). Water purifiers are divided into microfiltration water purifiers, ultrafiltration water purifiers, nanofiltration water purifiers and reverse osmosis water purifiers according to their water purification capacity from low to high.

1. General water treatment equipment

1. Microfiltration water purifier

Most water purifiers and water purifier taps are microfiltration water purifiers, which can filter out sediment, rust, residual chlorine and remove odors, but cannot filter out bacteria, viruses, heavy metals and minerals. They are suitable for areas with good water quality, and the filtered water cannot be drunk directly.

2. Ultrafiltration water purifier

Ultrafiltration water purifiers can filter out bacteria and most viruses, but cannot filter out heavy metals, small molecular organic matter and minerals, and cannot soften water. If the water is hard, there will still be scale after filtering it. The filtered water cannot be drunk directly.

(II) Reverse Osmosis Water Treatment Device

1. Nanofiltration water purifier (also known as loose type reverse osmosis water purifier)

Nanofiltration water purifiers can filter out most heavy metals, organic pollutants, bacteria and viruses, while retaining some minerals. Nanofiltration water purifiers have good water purification effects and can retain some minerals.

2. Reverse Osmosis Water Purifier

A reverse osmosis water purifier, also known as a pure water machine, can filter all substances except water and is generally used in areas with a relatively high risk of water pollution.

3. Selection of water purifier

1. Choose a water purifier that has obtained a health permit

my country implements health administrative licensing management for drinking water purifiers. Whether it is domestic or imported, it is necessary to check whether it has a health license issued by the health authority, whether the license is valid, and whether the content of the license and its attachments are completely consistent with the actual water purification process and materials of the product. For products claiming to be imported, it is also necessary to check the customs entry form and commodity inspection certificate.

(II) Choose the right type of water purifier

Choose the right type of water purifier according to the specific conditions of the drinking water quality in your area. The same type of water purifier has basically the same filtering working principle, so there is no need to blindly pursue expensive ones.

(III) Selecting the appropriate wastewater ratio

The wastewater ratio of reverse osmosis water purifiers and nanofiltration water purifiers should comply with the provisions of GB34914-2021 "Limited Values ​​and Water Efficiency Grades of Water Purifiers". The wastewater ratio is the ratio of pure water and wastewater discharged by the water purifier. For example, a wastewater ratio of 2:1 is equivalent to 2 liters of pure water and 1 liter of wastewater. In theory, the higher the wastewater ratio, the more water is saved, but the service life of the filter element will be shortened, resulting in higher use costs.

4. Use of water purifier

1. The water purifier should be cleaned as necessary before first use.

(ii) Replace the filter element regularly and clean it regularly according to the instruction manual. Only the correct and standardized use of the water purifier can ensure the water purification effect.