Doomsday: Unlimited upgrades to the shelter

Chapter 28 Pig manure?Can this thing generate electricity?
Everyone heard what Xie Yannan said, you look at me, I look at you, no one said a word.

After paying half the price, Qin Xiaocheng stood up slowly, and pointed to the grove not far away, "When I first came here, I vaguely saw a pond over there, is it a biogas pond?"

Wang Hui shook his head. He is just a blacksmith in the mountains. He has never heard of marsh or methane gas. The pit stinks."

"The farmyard manure can't be used up at all, so they gather here in a unified way, and wait for more for septic treatment."

Qin Xiaocheng suddenly looked at Xie Yannan excitedly, "Boss, do you know about biogas power generation?"

Although Xie Yannan is a novice in electricity, he knows that biogas can generate electricity, but it is obviously the reincarnation of livestock. What about poop, it is far from biogas pits, right? !

"I know." He replied lightly.

Coincidentally, the pig manure pond is about ten meters long and seven meters wide, covering an area of ​​quite a lot. No matter how you calculate it, it is [-] square meters. Originally, Xie Yannan didn't like that place, but he just thought it could be used for it at that time. Watering the soil and fertilizing, so I didn't pay attention to it for the time being.

"Then this matter will be easy to handle. We will use pig manure to generate electricity." Qin Xiaocheng seemed even more excited, regardless of being an injured person, he stood up and went around to Xie Yannan, and patted him on the shoulder, "We just need a biogas generator”

Qin Xiaocheng sat down and explained to everyone.

First of all, the manure of these livestock should be used to make biogas digesters.The production of a biogas digester is relatively simple, but it cannot be made with feces alone, and the sewage sludge in the sewage ditch must be searched to make the biogas digester rich in biogas bacteria, so that the feed liquid is not easy to acidify.

"I just took a look. The feces capacity in the biogas digester is about 50% of the pond. Let's go to the stinking ditch to fill in 10% of the dirt, and then add 20% of the water. The most basic biogas digester is completed. .”

While explaining excitedly, he picked up stones on the ground and sketched out his original idea.

"Let's do this first, and I will explain to you the issues that should be paid attention to in the follow-up biogas digesters."

Xie Yannan immediately understood when he heard him say this, "Then, don't you need a biogas generator, how big is it?"

Qin Xiaocheng didn't even ask for his opinion, he didn't even know if the system could provide such unorthodox things.But the concept is good. Even if the biogas digester fails to generate electricity, it can at least provide them with biogas for cooking. Just like the natural gas in the city, the advantages outweigh the disadvantages.

"I did the math. The biogas digester is successfully built. It can produce 70*0.4=28 cubic meters of gas per day. Divide 28 cubic meters by the matching coefficient of 1.6=17.5 kilowatts, and it can generate about 17 kilowatts of electricity per day. It generates electricity for four hours a day, which is Divide 17 watts by 4, which is about 4.5 kilowatts, that is to say, we need at least 4.5 kilowatts of biogas generators..."

"Okay, okay, there is a specialization in art, don't talk about it, I don't understand it, you just do it." Xie Yannan waved his hands, he couldn't listen anymore, but the man seemed to be really knowledgeable.

【Shopping store】

【Tools】

【Biogas generator (5kW): 4500 points】

[Instructions for use: The system will automatically detect the function of the generator and perform regular maintenance]

Fuck!A purchase returned to the poor, Xie Yannan hesitated for a few seconds, and then made a choice without hesitation.

[The system points have been updated, the current system points are 381 points]

Although it is very expensive, the problem of power supply must be solved. Not to mention the current use, the mission issued by the system is to upgrade the shelter to level five. Isn't there a light bulb on level five?

"The generator is ready, it's over the pig manure tank, you should get it done as soon as possible, I don't want to mess around." Xie Yannan muttered.

There are more and more people in the valley, safety is a big hidden danger, and food is also a big problem.

After a fight in the No. [-] Hospital, Xie Yannan understood that there are more than just zombies in this mode of monsters, so he originally thought that the high mountains around the valley could form a natural barrier, but now it seems that it is not very feasible.

If a group of swift zombie dogs came up the hillside and surrounded them, the consequences would be unimaginable, and a little more protection must be done around them.

Xie Yannan frowned, and saw that the six craftsmen followed Qin Xiaocheng to work on the pig manure tank, Yang Chen also consciously prepared dinner, he leaned his head on Xiaoxiao's shoulder sadly, and fell into deep thought.

Even if system points are easy to obtain now, they are still not enough to spend. Heavy weapons are a fantasy, but the basic barrier on the top of the mountain must be done well.

It suddenly occurred to him that the neighborhood where he lived before was surrounded by walls of about three meters. There was a spiral barbed wire with spikes on the top of the wall. Yes, people can't get close at all.

If this steep mountain is used as a wall, and then follow the practice of the original community, this can be regarded as the most basic barrier.

The points in the system are not enough, so I can only use reputation points to make up for it for the time being. When I think that my upgrade is nowhere in sight, and the lives of so many people are in my hands, I don't feel a little more anxious.

[The reputation value of the system has been updated, the current reputation value is 0]

【The system points have been updated, now the system points are 12381 points】

Xie Yannan exchanged the remaining reputation points in one go, praying that these can be exchanged for materials and labor. Unlike biogas pits, which can use their own people to slowly operate and save points, he had better fully deploy them before the darkness comes.

[The system has turned on the smart distance measurement mode]

[The required spiral anti-theft net is about 3100 meters, and the required steel wire is about 1622 meters]

【预估材料价格：3100*3=9300积分，1622*2=3244积分，合计12544积分】

[Estimated labor price: 3000 points]

[Warning: Insufficient system points]

Meow!Sure enough, the system is not trustworthy, even if you take all your property, it is not enough to exchange for a basic protective barrier.

FUCK FUCK!
Xie Yannan raised his head and looked at the surrounding hillsides again. He felt that danger was approaching at any time. He couldn't help but cursed in his heart, wouldn't the system be upgraded?What a fucking nonsense~
【The system has automatically updated the system】

【during upgrade……】

really……

It's all routines... Xie Yannan took a deep breath, it's better not to offend it, and to count on it to lead her to the pinnacle of life.

【System upgrade completed】

[Storage capacity expanded from 1% to 2%]

[The points rules have been updated: everyone in the shelter survives for more than 24 hours, and the points will increase by 100 per person on that day]

[The system points have been updated, the current system points are 13281 points]

……

　The previous tens of thousands of characters have been a bit of a foreshadowing. Starting from [-] characters, the main line is basically the shelter. Don’t give up on the text, Feifei wants to write seriously, and doesn’t want to follow the trend blindly. Now that she has finished the book, she must I don’t know how to cut books, so I hope you will support me a lot and collect more!

　　
　
(End of this chapter)