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Suzhou Kaixu Purification Equipment Co., Ltd
Let's talk about things you don't know about ultrapure water
Date: 2025-02-13Read: 8
1、 How long can the pure water and ultrapure water produced by the ultrapure water machine be stored?
How long can the pure water and ultrapure water produced by the ultrapure water machine be stored? Due to the fact that the production speed and efficiency of ultrapure water machines are far higher than traditional pure water production standards, they have become one of the equipment for laboratory pure water preparation. Different ultrapure water machines can produce different qualities of pure water. Although there are many brands and models of laboratory ultrapure water machines, most of them complete the same task. So, how long can the pure water and ultrapure water produced by the pure water machine be stored?
The production speed of ultrapure water machines is much higher than traditional pure water production equipment, and has become one of the laboratory water production equipment in various water industries. Although the water quality of ultrapure water produced by different ultrapure water mechanisms varies, the water quality maintenance is basically the same. So, how long can half of the water extracted from the ultrapure water machine be maintained? Let's talk about it in detail below.
Generally speaking, the higher the purity of laboratory water, the less likely it is to be stored for too long. For ultrapure water with a purity of 18.2 M Ω. cm, the longer it is stored, the more severe the decline will be. Generally, the electrical resistivity of ultrapure water stored for 1 hour will drop to 4 M Ω. cm, and the pH will drop to around 5.7. At the same time, due to environmental factors, microorganisms in the water will rapidly grow.
Therefore, in general, ultrapure water should not be left for a long time after extraction, and should follow the principle of immediate use. At the same time, in order to ensure the quality of pure water and ultrapure water, we should pay attention to the following points when taking water:
1. Ultra pure water machines should be watered and rinsed once every 7-10 days to prevent bacterial growth.
2. In the case of long-term unsuitability, it is necessary to discharge all the water in the pure water machine and water tank.
3. When the ultrapure water machine takes water, the initial pure water and ultrapure water should be discharged, and water can only be taken after the water quality is stable.
4. Do not place the pure water machine and water storage tank in direct sunlight to prevent the growth of bacteria.
The above is the storage time of the ultrapure water mechanism after taking water. Users need to have some understanding of it in order to use the equipment well and not waste the produced pure water
2、 How to reduce microbial growth in ultrapure water machines?
How to reduce microbial growth in ultrapure water machines? After prolonged use, due to the sealed environment, the ultrapure water produced by the ultrapure water machine may exceed the standard over time. Is there any way to reduce the growth of microorganisms in the ultrapure water machine?
There are generally several reasons for the growth of microorganisms in ultrapure water machines:
1. In a sealed environment, poor contact can lead to water leakage, which can cause the internal environment to be affected by external microorganisms and breed bacteria.
2. Long term failure to replace consumables leads to excessive accumulation of microorganisms on the reverse osmosis membrane, resulting in an increase in microorganisms and a decrease in water quality.
3. Long term disuse of the ultrapure water machine leads to microbial growth in its idle state.
4. The poor quality of the incoming water leads to the rapid consumption of consumables in the pretreatment system, which can result in the rapid proliferation of microorganisms.
There are several methods to reduce microbial growth in ultrapure water machines, including:
1. Regularly ensure the regular start-up cycle of the ultrapure water machine, allowing the pipeline to enter the water circulation.
2. Regularly replacing consumables, checking water quality regularly, and replacing them promptly when the water quality is not up to standard can reduce the growth of microorganisms.
3、 How to maintain the water quality of ultrapure water machine
The quality of water removed by a pure water machine depends not only on the pure water equipment, but also on how we operate it correctly in our daily use to maintain the water quality of ultrapure water.
1. The water storage tank of the ultrapure water machine should be equipped with an air filter to prevent air from seeping into the water storage tank through the water inlet and causing water pollution.
2. Due to the susceptibility of ultrapure water to environmental pollution, it is possible to use it immediately when needed, minimizing the contact between ultrapure water and the environment.
3. The water storage tank of the ultrapure water machine should be avoided from being placed in direct sunlight as much as possible.
4. Ultra pure water stored in water storage tanks for a long time should be avoided as much as possible to prevent the water quality from deteriorating due to prolonged storage.
5. When using ultrapure water for water collection, the initial ultrapure water should be discharged before using a water collection vessel for water collection.
6. When the pure water machine is not used for a long time, all the pure water in the pressure storage tank should be drained to prevent contamination.
7. The pure water machine needs to be supplied with water once a week to prevent bacterial contamination.
8. When taking water, efforts should be made to avoid the formation of water bubbles that may affect water quality.
4、 What are the electrical resistivity and conductivity of water?
What are the electrical resistivity and conductivity of water? In the water treatment industry, we often hear conductivity and resistivity used to indicate the purity of water. So, what do conductivity and resistivity mean? What do they represent? How to test conductivity and resistivity?
The electrical resistivity of water refers to the resistance between the opposite sides of a 1cm cube at a certain temperature, measured in Ω. cm or M Ω. cm. The conductivity is the reciprocal of the electrical resistivity, measured in S/cm (or μ s/cm).
The electrical resistivity (or conductivity) of water reflects the amount of salt in the water. It is an important indicator of water purity. The higher the purity of water, the lower the salt content, and the higher the electrical resistivity (conductivity) of water.
The electrical resistivity (or conductivity) of water is influenced by various factors such as water purity, temperature, and measurement. The measurement of pure water electrical resistivity (or conductivity) is carried out by selecting a dynamic measurement method and using temperature compensation to convert the measured value into a resistivity of 25 ℃ for measurement and comparison.
When measuring resistivity or conductivity, connect the conductive electrode or measuring device to the water production system. Drain the pipeline measuring device and the bubbles in the conductivity pool, adjust the water flow rate (generally not less than 0.3m/s), and install a thermometer at the outlet of the conductivity pool. Operate the conductivity meter according to the instrument manual (preheating, zeroing, calibration, and measurement). After the instrument reading stabilizes, record the water temperature and conductivity values. Online measurement should use a conductivity meter with thermometer compensation, which can directly read the conductivity value at 25 ℃. The reciprocal of conductivity is the resistivity value.
Suzhou Kaixu Purification Equipment Co., Ltd. is a one-stop service provider specializing in water treatment engineering equipment construction consulting, design, manufacturing, installation, after-sales maintenance, and more. For many years, we have continuously provided customers with water treatment engineering equipment and service solutions, creating reliable and energy-saving water treatment engineering equipment for users; Strive to earn recognition and reputation for the Kaixu brand.