"What are these?" In the central room of the air circulation duct of the police station shelter, Uncle Ding looked at the items on the shelves in front of him and asked in confusion: "Does it look like a glass plate?"
A technician who was debugging these equipment heard Uncle Ding's question and explained to him while continuing the work at hand: "This is an algae culture tank. The standard name is a biological reaction facade..."
After checking the condition of a bioresponsive facade, the technician continued: "Of course, in terms of material, you can also call them glass plates. These are all made of plexiglass. The inside of the facade is hollow and filled with After the culture medium, water and carbon dioxide are used to propagate the algae.”
Seeing the thousands of bioreactive facades in front of him, and more being installed, the manager of the city police station who was with Uncle Ding asked: "Can they be used to supply oxygen? By relying on these algae?"
"Yes, relying on these algae." The technician nodded and tapped a biological reaction facade nearby with his finger: "These algae will obtain the light energy required for photosynthesis under the irradiation of the sun lamp. We Carbon dioxide is injected through the pipes at the lower end of the facade to allow the algae inside to perform photosynthesis, while the pipes at the top are responsible for collecting the oxygen released by the algae and supplying it to the air circulation system of the shelter.”
"Just rely on these... What kind of facade are there?" Another manager also spoke, revealing a strong suspicion and distrust: "Can these things be used by 20,000 people in this shelter?"
When the manager spoke, the managers of the city police station all had the same look on their faces.
It’s not that these managers don’t pretend to understand or look down on the technicians, but the thousands of glass panels installed here can supply the oxygen consumption of the entire shelter. This really makes people doubt whether it is true. can do it.
"These biological facades use microalgae bioreaction oxygen production technology. The Germans have done a similar technology experiment before and built a residential building that uses this biological reaction to construct the outer wall. A biological residence like this The biomass produced after the reaction provides enough heat and electricity to meet the needs of three surrounding residences." The technicians were not surprised by this and continued to explain to the managers of these city police stations.
After all, it was a matter of life and death for more than 20,000 people in this shelter, and the technicians felt that they should explain it more clearly.
"We have improved this technology. We originally planned to use it for experiments on submarines to see if it can be used as an oxygen supply system for submarines to increase the time the submarine stays underwater." The technicians did not conceal that this was originally a military experimental technology. In fact, he continued: "The efficiency of algae in producing oxygen is actually the highest among all living things on earth. 70% of the oxygen on earth comes from marine ecosystems, so relying on algae to supply oxygen to shelters is theoretically no problem at all. of.
As for whether the oxygen production capacity can meet the survival needs of 20,000 people, please don't worry about this. This system is designed to meet the needs of 30,000 people.
And although the oxygen content in the outside air will drop, it will not drop to the point where humans cannot survive. It is just that the oxygen content will drop to a level similar to that in plateau areas. This system is mainly to prevent the oxygen content from declining. , Carbon dioxide deposition and lack of oxygen inside the shelter due to underground structures. "
The technical staff's explanation reassured the managers a lot. After listening to the explanation, several people in charge of logistics discussed something on the sidelines.
"You said that the oxygen content in the outside environment will not drop to the point where humans cannot survive?" When the technician mentioned the issue of oxygen content in the outside world, Uncle Ding was particularly concerned because the SWAT team currently has the most field operations in the police station. Department, he is very concerned about this issue.
The technician seemed very interested in answering this question and stopped what he was doing to explain: "The total amount of oxygen in the earth's atmosphere is about one quadrillion tons, and a person breathes about 270 kilograms of oxygen per year.
Even if calculated at 0.3 tons, even if the earth's population of 7 billion is still there, it will take 550,000 years to completely consume all the oxygen in the atmosphere, and it will take thousands of years to reduce the oxygen content by 1%. "
After saying this, the technician laughed and added jokingly: "Of course, this is actually impossible. Even if the atmospheric environment only drops by one or two percentage points, it is enough to cause a hypoxic reaction in humans. If the atmospheric environment The oxygen content in the air is less than 15%, which is enough to cause serious consequences.
Previous meteorite impacts and global fires have consumed a considerable part of the oxygen in the atmosphere. According to calculations, the oxygen content in the atmosphere has dropped by approximately 0.5 to 1 percentage point.
In addition, there is no sunlight now, photosynthesis is close to stagnant, and no new oxygen is produced in the atmosphere. The oxygen content in the external environment can still be maintained at about 18-15%. Of course, this depends on the region and environment.
However, in the shelter, due to the problems of the underground building itself and the ventilation system that only relies on the ventilation system, the oxygen content will be lower than the outside world. According to calculations, if there is no oxygen supplement inside the shelter, the oxygen content is likely to drop. to less than 15%, and carbon dioxide deposition is formed, leading to hypoxia. "
After hearing the technician's explanation, Uncle Ding nodded clearly, but his brows furrowed.
Whether the external environment can survive or not, the SWAT team needs to consider completely different issues when going out into the field.
If the external environment cannot survive, then the dangers in the external environment will mainly come from the harsh natural environment. This can ensure the safety of field personnel by improving the protective equipment and safety measures for field personnel.
But if the external environment is still survivable, but the conditions are harsher, then the danger will undoubtedly increase greatly for field personnel who go out to perform tasks.
In peacetime, there are still various crimes such as two robberies and one theft. In the apocalypse, as the government's control over the city weakens, criminal behaviors will breed even in shelters, not to mention that the wild is now too dangerous for the government. Is it considered an area beyond reach
The technician seemed to notice Uncle Ding's worry, smiled and comforted him: "But you don't have to worry too much, comrade. In addition to lack of oxygen, the temperature in the wild will also seriously restrict human activities in the wild. With temperatures as low as tens of degrees below zero and lack of oxygen, not many people can stay in the wild for a long time in this harsh environment." (End of Chapter)