In recent years, the water quality problem has become more serious. Many households have installed water purifiers, but the water purifier will filter out the waste water. How do these “waste water†actually produce, will it really waste a lot of water in our house?
1. Why does the water purifier produce wastewater?
There are many water purifiers on the market, and the water purifier that will discharge the “waste water†is often the RO reverse osmosis water purifier, because its core component reverse osmosis membrane is actually a liquid concentration process in the process of working, the water The salt content increases with the flow of water through the surface of the reverse osmosis membrane, and the osmotic pressure of water continuously increases.
When the osmotic pressure is increased to the pressure of the booster pump, water cannot flow into the clean water end through the reverse osmosis membrane. In addition, due to the increasing concentration of minerals in the water, some minerals will deposit on the surface of the reverse osmosis membrane and block the pores of the reverse osmosis membrane, resulting in a decrease in the water production of the reverse osmosis membrane and a decrease in the salt rejection rate.
The above phenomenon should be avoided during the operation of the RO reverse osmosis water purifier.
Therefore, some of the water will be washed against the reverse osmosis membrane, and the water used for the flushing will be eliminated, which is called “waste waterâ€. All the reverse osmosis membranes have a ratio of water that can be made into product water. It is "recovery rate".
(The tap water is compressed into the reverse osmosis membrane and becomes two parts of clean water and concentrated water. The ratio of clean water to concentrated water is the wastewater rate.)
Second, the water purifier is really a water tiger?
In the past, there may be many water purifiers with a wastewater rate of around 1:3, but with the advancement of technology, the wastewater rate of most new water purifiers on the market has been controlled at around 1:1, many It is a cup of pure water that discharges the “waste water†below a cup, and the proportion of waste water discharged by a better water purifier will be less.
Let us calculate the account now. If it is just like me, pure water is used as the daily drinking water of the family. According to the water consumption of a family of three, each person drinks 2L of water a day, 180L pure per month. Water, according to the 1:1 wastewater rate, that is to say, the family will discharge about 180L of "waste water" in one month.
However, we have to abolish about 40L of water every day when we take a bath, and the family has to spend 3,600L of water per month. Therefore, even if the "waste water" of the water purifier is not used, it will not cause excessive waste of water resources, and it is not necessary to worry too much about the waste water.
3. Is there any reuse value for the “waste water†produced by the water purifier?
However, these "waste water" are directly discharged, and there is always some waste. It is different from the bath water after all. Take the RO reverse osmosis water purifier as an example. The "waste water" has been filtered through the first three stages of the filter. , a large part of the impurities have been removed.
In addition to the slightly higher salt content and bacteria than tap water, most other indicators, such as turbidity, color, organic matter, colloids, etc., are much lower than tap water.
In summary, we can completely collect these “waste water†buckets. If they are used well, the value is still quite high.
Fourth, how to use "waste water"?
As we have already said before, “waste water†is also filtered through the first three stages of the filter element, and a large part of the impurities have been removed, so it is no problem to use for washing. The easiest way. For example, the wastewater from my water purifier is taken in an 18L large bucket and can be used for nearly a week.
In addition, you can also consider your own DIY household water purifier wastewater recovery system, that is, use water tanks to connect the water purifier wastewater, use the water pump to recycle the wastewater to the sink for reuse, and the DIY cost is not high.
Here we first say some very simple and practical methods:
1, kitchen washing water
When I have finished washing the dishes, I will use the basin to connect the "waste water" to the washing spirit to first soak the bowl, then brush it clean, and finally rinse it off with tap water. Secondly, it is very convenient to wash the rag and wipe the table.
2, household cleaning water
In addition, the dust in my house is particularly large. I usually have nothing to do with wiping the table, balcony, or the ground. Using "waste water" is not the most suitable choice. Although it can't save much, but think about the lack of water, you can save a little bit.
3, flushing the toilet
The flushing toilet does need a lot of water every day. If the urine is also washed by a water tank, I will prepare a bucket of “waste water†in the bathroom to wash it. This saves water to a large extent. . Of course, the water that has been dragged over can flush the toilet.
Xiao Bian suggested to use the household water purifier, do not have to worry too much about the waste water generated by the water purifier will be wasted, the "waste water" filtered by the three-stage filter can not be used in addition to drinking, in fact, can be applied to many life scenarios So we can try to reuse the "waste water".
Save a little water every day, not only can save a part of the water fee, but also contribute to the country's water conservation.
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