In our opinion, when we usually say whether there is waste water or not, we should mean the difference between continuous discharge and intermittent artificial discharge. Typically, the water purifier using reverse osmosis technology will continuously discharge waste water during the working process, while most other types of machines use ultrafiltration technology, which is usually manually cleaned and discharged at regular intervals, so it is also called a machine without waste water. In fact, it is possible not to discharge wastewater, but it will greatly shorten the service life of filter materials and shorten the replacement cycle, which is very uneconomical, especially for reverse osmosis membranes with extremely fine filtration accuracy and relatively high price.
Question 2: Who can tell me what the waste water ratio of the water purifier means? For example, if you take a cup of pure water and discharge three cups of wastewater, the wastewater ratio is 1:3.
Traditional ones are generally above 1:3.
Those who are doing well now can reach 1: 1.
The best Prometheus can reach 2: 1.
Question 3: How does the water purifier reduce the waste water rate of products? You can't reduce it. You can choose to change other brands (no water consumption).
As a salesman who has been selling water purifiers for nearly 5 years, I have to say that the water purifier industry is chaotic;
If you want to buy a water purifier that suits you, please read and think about this short article carefully:
You may not have thought about it: is there a problem for water purifier manufacturers to produce water purifiers of the same brand, different models and different prices?
Have you ever thought: If the low-priced model (so-called three-stage) water purifier produced by a factory can meet the water purification requirements?
If you can?
So is it necessary to produce high-priced models (so-called class 5 or class 8) for water purifiers?
And much more expensive?
But: if the high-priced water purifier can really meet the water purification standard?
So selling low-priced models of water purifiers is not deceiving customers?
In order to adapt to the market, is the enterprise that sells regardless of whether the quality is up to standard trustworthy? It may say, in fact, our low-end products are up to standard, and the high-end products are just more perfect in function (nonsense, in fact, he is telling you that it doesn't matter whether it is used or not, tap water can only be used in households if it meets the standard)
So: when buying a water purifier, the price is not important, and the brand is not important. The only thing that matters is the effect!
How to choose an economical and efficient water purifier? You can refer to the following important indicators to buy:
1. Look at the filter element: the core component of the water purifier, and its quality directly affects the purification index of the water purifier.
First of all-pay attention to whether the filter element can filter impurities and make the water look clearer (it can be said that any water purifier can do it, but different filtering methods have completely different effects)
Filtration membrane: the market is also full of various brand-name filtration membranes, pp cotton and so on; In fact, the function is only to filter impurities above a certain specification.
Reverse osmosis: the most common in the market, and the filtration rate of 99% has become its biggest selling point; The disadvantage is also obvious that it is too clean (there are no minerals beneficial to the human body; And cannot filter microorganisms such as bacteria and viruses).
Secondly, pay attention to whether the filter element can filter odor and improve the taste (any water purifier with activated carbon can, but the filter element has different structural effects, different service life and different prices).
Granular activated carbon filter element: odor can be removed in a short time, but after a long time, it will be washed out of the waterway by water and lose the filtering effect; Disadvantages: the service life is uncertain (users will only know if the filter element has lost its purification ability)
High density activated carbon: long service life; Block structure, will not form a waterway; Disadvantages: Due to patent protection (high production cost), the production is complicated and expensive (it is 100 times higher than granular activated carbon with the same weight).
Finally-pay attention to whether the water purifier can kill microorganisms. Viruses and bacteria in microorganisms are potential pathogens and must be removed (ordinary products cannot kill microorganisms; Some products can kill microorganisms, but technology determines the risk of purification)
Chemical sterilization: kill microorganisms with chemical filters; Disadvantages: chemical residue, affecting taste and health (treatment: after installing chemical filter, improve the taste of ion filter or activated carbon filter; So that consumers can't directly detect the abnormality from the taste, which improves the difficulty of identifying chemical residues)
Ultraviolet sterilization; The sterilization rate is as high as 99%; Disadvantages: need to be charged (potential leakage safety hazard; Of course, the wireless transmission technology of electric energy can avoid potential risks), but this technology is protected by patent (high production cost)
A qualified water purifier can filter impurities, retain minerals beneficial to human body and improve the taste of drinking water.
A high-quality water purifier must: filter impurities, retain minerals beneficial to human body, filter various chemical pollutants, improve the taste of drinking water, and kill bacteria and viruses at the same time.
2. Look at the installation: Whether the water purifier is convenient to install directly affects your future use (is it convenient to move? Can I install it myself? The simpler the installation, the more convenient the maintenance)
Avoid-most of the pipeline replacement is under the stage, so it will be very inconvenient when the filter element needs to be replaced.
(For example, reverse osmosis needs to install a booster valve, and the pipeline must be replaced, so it requires professionals to install it at home, which is very troublesome, and there are also personnel ... >>
Question 4: Why does the water purifier produce much more waste water than good water? You should refer to RO reverse osmosis water purifier.
Why is it much more than good water Qianye water purifier answers for you:
First of all, understand the reverse osmosis technology: Reverse osmosis technology is the most advanced, energy-saving and effective membrane separation technology. Its principle is that under the action of osmotic pressure higher than that of solution, other substances and water are separated according to the fact that they cannot penetrate the semi-permeable membrane.
Reverse osmosis: (put the same sea water or salt water on both sides of a container, and block the middle with a semi-permeable membrane (reverse osmosis membrane). The solvent in the dilute solution will naturally flow to the concentrated solution side through the semi-permeable membrane, and the liquid level on the concentrated solution side will be higher than that of the dilute solution to form a pressure difference, which means that the osmotic pressure depends on the type of concentrated solution, and the concentration and temperature have nothing to do with the properties of the semi-permeable membrane. If a pressure greater than osmotic pressure is applied to one side of the concentrated solution, the solvent in the concentrated solution will flow to the dilute solution, and the flow direction of this solvent is opposite to the original osmotic direction. This process is called reverse osmosis. Through the reverse osmosis process, we can make water flow from high concentration solution to low concentration solution. Because inorganic ions, colloidal substances and macromolecular solutes cannot pass through the reverse osmosis membrane, in this process, we leave unwanted substances at one end of the high-concentration solution, and the low-concentration end is the purified solution we get.
The working process of reverse osmosis membrane, the core component of water purifier, is actually a process of liquid concentration. As water flows over the surface of reverse osmosis membrane, the salt content in water increases, and the osmotic pressure of water also increases. When the osmotic pressure increases to the pressure of the booster pump, water cannot flow into the purified water end through the reverse osmosis membrane. In addition, due to the increasing mineral concentration in water, some substances (such as calcium carbonate, calcium sulfate and silicon) will be deposited on the surface of reverse osmosis membrane, blocking the pores of reverse osmosis membrane, resulting in the decline of water production rate and desalination rate (the ability of reverse osmosis membrane to remove inorganic salts from water). The water purifier should avoid the above phenomenon in the operation process, so all the reverse osmosis membranes in use have a proportion that can turn the inlet water into product water, so the so-called wastewater is produced.
Question 5: The wastewater ratio of the water purifier is 1: 5, 1: 3, 1: 2, 1: 1. What proportion is better? 1:3 is the most standard ratio. Including economically developed countries, this ratio of gold to wastewater is also widely used.
The wastewater ratio is not as high as possible, nor is it as low as possible.
1:5, the water purifier that can make this waste water ratio is not very familiar, is it professional? If it is 5: 1, it is fooling you or the water purification effect is very rough.
1:2, this is quite reliable. But it is not the international wastewater ratio.
1: 1, personally not recommended. Because even if this wastewater ratio is reached, it is at the expense of some aspects. You reduce the wastewater ratio to save water, but in fact, the low wastewater ratio is generally at the expense of the service life of ro membrane. Moreover, the general ro membranes on the market are very expensive. This is not cost-effective.
To sum up, 1, regardless of the proportion, you must choose a regular big brand;
2. Recommendation 1:3
Question 6: What does the water purifier mean by dual water type? What is the waste water discharged? One part of pure water and one part of ultrafiltration water; Too much waste water is normal, and the most important thing is that you can use it (the so-called "waste water" is the water filtered in the first three stages).
Question 7: What's the difference between wastewater from water purifier and micro-waste? 1. There is a wastewater solenoid valve in the water purifier, and the wastewater can be adjusted to 0, but this will have a serious impact on the machine and the membrane. In fact, the wastewater rate of RO is generally 1: 3, so as to really ensure the desalination rate. If it is adjusted randomly, the water filtered by the water purifier will be unqualified after one month.
2. Adding an RO membrane to filter the wastewater again will increase the cost a lot and shorten the life of the membrane. Several manufacturers have such products, and ordinary companies don't do it.
Question 8: What does the waste water rate of the water purifier mean? Is it clear water: waste water? For the water purifier that produces wastewater, the higher the rate, the better? The concept of waste water rate is agreed on the first floor, but the comparative example and the quality of water purifier are not agreed.
There are many processes used in water purifiers, which are mainly divided into several categories: 1. There is only one stage of filtration 2. Filtration+activated carbon adsorption 3. Filtration+ion exchange+activated carbon adsorption 4. Filtration+membrane filtration+activated carbon adsorption.
Basically, each of the above has its advantages and disadvantages. The lower the wastewater rate of a certain type, the better, but if the fourth type is compared with the first type, the lower the wastewater rate of the first type is certain, but it is not necessarily good.
At present, the last RO reverse osmosis membrane used in the market has a high wastewater rate, which is due to the process. RO reverse osmosis membrane belongs to semi-permeable membrane. By intercepting all minerals and harmful substances in throttling water, only water molecules are allowed to concentrate to produce wastewater.
Generally, there are many RO reverse osmosis membranes, and the wastewater rate is about 70%, which wastes a lot of water. I personally don't recommend using them.
Some manufacturers say that the waste water rate is also nonsense. Generally, it is necessary to reduce the wastewater rate. No matter whether it is reflux or cascade filtration, the membrane will be damaged, and the price of the membrane is very expensive and uneconomical.
Some manufacturers use ultrafiltration membranes with larger pore size, which is also a sign of dishonesty to users.
Question 9: Is it better to have wastewater or no wastewater in the water purifier? The first-class water purifier without wastewater only filters out the suspended matter visible to the naked eye, while the second-class water purifier can filter out the suspended matter and peculiar smell in the water. The water purifier with wastewater belongs to reverse osmosis type, which is generally five-stage filtration. In addition to filtering out suspended solids and odors, even impurities such as organic matter, inorganic matter, drugs, bacteria and viruses dissolved in water that are invisible to the naked eye can be filtered out, and direct drinking water comes out. But the price of this kind of machine is of course a little more expensive. Which one to choose depends on your requirements.