Can you drink the beer brewed to the toilet?

Source: Science Popularization China

Recently, Singapore, which has always paid attention to environmental protection, has launched a "special" beer, which is widely welcomed by consumers. Why is this beer "special"? Because beer is brewed with recycled flush water. I do n’t know if it ’s okay. How much will it affect it? It is still popular, is it a bit incredible? Let's talk to you about this incredible beer bar today!

01, about this news

This news has both gimmicks and technology.

Let's talk about gimmicks first. Everyone understands this. It uses water recycling toilet water to make beer, and there is a limited saying, so it is not special to buy it. It is very good, so it is normal for the fresh and collected snap -up to buy.

Among them, it is worthy of attention: technology. Turning the recycling water into drinking water, maybe many people think that this thing is not a very mature technology?

For example, Shenzhou is so dry in space. Treatment of sewage and then drinking water, including the urine of the astronauts, will be treated and re -become drinking water.

However, there is an important question here: cost. The cost of wastewater can be used to drink, and the cost is extremely high, that is, a large -scale scientific research activity such as aerospace that is basically expensive without cost will be willing to use various high -tech without cost.

In reality, it is basically impossible, and the cost is too high.

02, how to deal with domestic sewage?

Of course, the sewage in our lives will also be sent to the sewage plant for treatment. It mainly uses the sewage treatment process of first -level treatment and secondary treatment phase combination. Grade treatment is to use biological methods to purify sewage and reduce nitrogen and phosphorus concentration in sewage, but the result after this treatment is to meet the national emission standards, not drinking water standards.

Therefore, these treated wastewater cannot be consumed directly, and they are often used for green irrigation, road flushing, vehicle flushing, construction, fire protection, etc.

Of course, there are also rows in the natural river after processing, and some people may feel that in this case, isn't it equivalent to the use of sewage? In fact, it is not the same. You cannot underestimate the dilution of natural water bodies for the sewage itself and the self -cleaning ability of natural and objective existence, so it is still "different sewage water and 100%sewage."

After the water body is contaminated, through a series of physics, chemistry and biology, the process of gradually restoring its original traits is called the self-public self-cleaning process.

Of course, the self -purification ability of water body also has a maximum limit.

However, we cannot be used directly for drinking. The drinking water we use is often directly from the river lake and then enter the tap water plant for processing before drinking.

03, why can't urban wastewater become drinking water?

Then you will definitely ask, in this case, can you deal with urban wastewater cleaner? Of course, for example, use various infiltration reverse penetration membrane treatment to make urban wastewater clean water, but this cost will increase amazing.

Everyone may wish to think, even if we use the water purifier to deal with water, the cost is very high, let alone meet the needs of the entire city.

Therefore, the cost of urban wastewater does not become drinking water, and the cost is the key.

And Singapore has actually worked in this area for decades. As early as the last century, the Singapore Public Business Administration began to explore how to transform urban sewage into drinking water. It took decades to solve this problem. The cost control is the key.

Only low costs can make wastewater use to become normal, otherwise it is unsustainable.

Therefore, we do not need to laugh at each other, we need to develop the corresponding technology to see if we can find lower technologies to achieve this process. If it is achieved, then water use of the entire country is a huge improvement.

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