"It's not just big, it's going to have a lot of special devices."

Zhang Chuyu shook his head and looked at Li Yuangang, who was a little dumbfounded, and said word by word: "First of all, you have to build a wide space under the ground of this bathroom. ”

"It's better to have a spherical space, like a beaker, understand? Like a beaker, it is connected by a thin tube in a spherical glass bottle. ”

"Then, you're going to need to build a device that can measure pressure, but that's going to require mercury, you know mercury, right?"

"I don't know."

Fat Li shook his head and said in a very honest tone: "I've heard the teacher say it, but I've never seen it." ”

Hearing this, Zhang Chuyu smiled slightly and said, "It's okay without mercury, can't you change the density of the soil?" As long as you liquefy the dirt and make the liquid dirt thicker, you're good to go. ”

"Then we can detect the scale that shows the pressure, and we are ready to use."

"But first, you'll have to build a spherical space that's twenty meters in diameter."

Hearing this, Fat Li widened his eyes slightly and looked at Zhang Chuyu in a daze.

At that moment, he thought he had misheard, and he wondered, "How much?" You just said how much is the diameter? ”

"Twenty meters."

Zhang Chuyu's answer was very direct, as if it were taken for granted.

After hearing her answer, Fat Li swallowed the saliva in his mouth with great difficulty, and said, "But Doctor, such a big pit is underground, will it be a couch here?" And the surrounding terrain is so fragmented, it is really unrealistic to build such a big pit. ”

"In addition, with me now, maybe, maybe a little reluctant."

Hearing this, Zhang Chuyu blinked slightly, and suddenly said, "Then how big of a pit can you make?" ”

"It's not a question of how big a hole to build, it's going to collapse when I build it, Doctor, this place is going to collapse."

Thinking that the female doctor was doubting his ability, Li Fatzi couldn't help but defend himself: "And I used to be in my hometown, and I saw that other people's biogas digesters were not so big?" Isn't the exhaust volume also very good? ”

Hearing this, the female doctor's pretty face was slightly red, but she pretended not to care and waved her hand, and said, "They are different from us, you know?" We're at the end of the world, you know? The last days will be different. ”

"The last days, the last days, the last days, we have to think about the way back."

"It's not just the digester, we, we're going to have a basement, yes, a basement!"

Zhang Chuyu's slightly red face suddenly swelled up with a look of excitement, and his tone was also extremely excited: "You can build the basement and the biogas digester together, so weak, what is the abnormal situation, after we hide in the basement, we also have energy, right?" ”

Hearing this, Fat Li opened his mouth slightly, but he couldn't find any reason to refute it, and finally he could only say helplessly: "Uh, doctor, with my current ability, it should be possible to make a spherical space with a diameter of ten meters underground." ”

Hearing this, Zhang Chuyu's face finally showed a smile that belonged to the winner.

"Ten meters is ten meters, and we will slowly expand it in the future."

Hearing this, Li Yuangang was silent for a long time with a sad face before finally nodding.

"Okay, but maybe it's going to collapse here, and we're only going to be one winter, so we can't make the digester too big."

"Hmm."

Zhang Chuyu supported his chin with his hand and lowered his head to think for a moment, before nodding slightly and saying, "According to what you say, then let's do it, you first build a sphere space with a diameter of only three meters, only a little volume, it shouldn't cause much damage." ”

The female doctor gave up those unrealistic thoughts and began to think about them seriously.

The construction of a digester itself is not difficult, but it does require a pressure difference.

Zhang Chuyu quickly thought of a reasonable plan for this.

Much of the water in the underground rivers is polluted, and although it is not drinkable, it is more than enough to suppress the biogas.

And the task of bringing up the water in the dark river was also handed over to Li Fatzi.

At noon, the prototype of the biogas digester was built.

Inlets, inlet pipes, fermentation rooms, gas storage sections, discharge pipes, water pressure rooms, movable covers, air ducts, overflow ports and safety covers have all been constructed.

And Zhang Chuyu also made a lot of changes, so that Li Fatzi added a lot of extra things.

These things are actually useless, but Zhang Chuyu insisted on adding them, and Li Yuangang himself didn't know what the general configuration of the biogas digester was, so he made whatever Dr. Zhang asked him to make.

So, the digester has stairs, a thermometer, carved walls, all kinds of stones, and a square metre wide isolation room.

But either way, the digester was built.

According to Zhang Chuyu, as long as the pressure scale is arranged, this biogas digester can be considered to be built.

In order for the biogas digester to play its role, one of the most important things is missing.

Well, the toilet has just been built, and there is so little manure in it that even if it is all fermented, it will not provide enough biogas.

But it's only a matter of time.

According to Zhang's estimates, it only takes half a month to store enough biogas and use enough biogas to drive generators to provide enough electricity.

In other words, even if Li Fatzi can't wait, he can only wait for half a month to be able to use the power, which makes Fatman Li extremely frustrated, but helpless.

The bleak autumn wind swept at the top of the hill slope, the scorching sun that was noon was a little pale, and the extremely low temperature made people wrap their clothes tightly, and they were easily reluctant to go out, and Li Yuangang, who had finished building the biogas digester, also realized everyone's wishes, and actually built a large canteen next to the earthen house that served as a kitchen.

The cafeteria has a wide skylight, which reduces its ability to keep out the cold, but it allows light in the canteen, and there are doors next to the skylight, so you can just close the skylight when it rains.

Of course, it was Zhang Chuyu who designed this canteen.

When the canteen was built, many people found that the place where he lived had been repeatedly renovated by Li Fatzi, and a large scale had formed at the top of this originally desolate hill.

At this time, the total number of people in the team, even if you add Zhang Chunjun, who is bedridden, is only ten people.

The power that Li Yuangang felt had brought great improvements and changes to the lives of his companions, and everyone was more or less shocked in the face of this change.

But before everyone could express the shock in their hearts in words, a terrible howl had already reached their ears.

[This book was first published from 17k, see the genuine content for the first time!] ]