Doomsday Bunker Upgrade

　　 After a month of calm, Chen Xin's life has not changed much during this month. He wakes up from the phone alarm on time every day, just like he used to sleep until he wakes up naturally.

　　 The day is not visible in the refuge, and it is meaningless to rely on light to judge day and night. In order to avoid ignoring the time of sleep, Chen Xin reset the phone alarm.

　　 Since he quit his job a few years ago to write a novel, this is the first time that Chen Xin has turned his mobile phone alarm back on.

　　 But returning to a regular schedule is also a brand new experience for Chen Xin, at least he feels that his mental and physical conditions have improved a lot.

Regular work and rest times naturally bring regular work and rest habits. After waking up, brushing his teeth and washing his face, Chen Xin will tear up a generation of self-heating food for breakfast, and while waiting for self-heating food to heat up, he will take advantage of this time to do more than a dozen Minutes of exercise, exercise.

　　Wait until the warm-up is over and the breakfast is already cooked. Eating at this time will make people more appetite.

　　 In the morning after eating, Chen Xin will first check the operation of various equipment in the shelter, and fill up the generator.

　　 After starting the generator to power the entire shelter, he will spend the morning in the planting greenhouse.

　　 Although we do not need to weed and remove insects, watering, fertilizing, and soil loosening are still needed.

　　 Needless to say, watering and soil loosening, although Chen Xin has not done it before, but with the video data in the computer, he can still make the difference and basically meet the requirements of planting.

　　 Although these vegetables cannot be said to be very lush, they are basically growing healthy and there is nothing wrong with them.

　　 The only thing Chen Xin couldn't stand was fertilizing.

When Chen Xin moved into the shelter, he did not buy chemical fertilizers. The soil in the planting greenhouse was obtained from the vegetable garden of a nearby farmer's uncle. Of course, the soil quality is not a problem, and it is the vegetable plot left by the farmer's uncle's family. He grows vegetables for his own consumption, so he has never used fertilizers and pesticides.

　　 However, when the farmer sold the soil to Chen Xin, he also reminded him that if he wants to grow delicious vegetables, he must remember to fertilize.

　　The fertilization of the farmer's uncle is of course not chemical fertilizer, but the legendary...farm manure.

　　 This thing is simply to use the black water part of the refuge water cycle system introduced before, the liquid obtained after fermentation, and the gas produced during the fermentation process is the legendary biogas.

　　 Under normal circumstances, a biogas digester is generally built in rural areas. The waste of humans and animals, straw and other organic matter are filled into the biogas digester, and methane is generated by the decomposition of the biogas bacteria, which can be used for daily cooking, heating, lighting and power generation.

　　 is a very common facility in the rural areas of Yan Country. It was promoted vigorously in the 1990s for the treatment of rural human and animal waste and to improve rural living conditions.

The black water treatment system in the sewage treatment system installed by Chen Xin also uses the same principle. It uses bacteria to decompose and recover the organic matter in the black water to realize the recycling and reuse of water resources. As for the gray water, it contains soap and washing water. The residues of hair lotion and washing powder cannot be directly added to the biogas digester, because these things will kill the decomposing bacteria in the biogas digester.

Chen Xin also considered using biogas as energy in the refuge before, but after calculating, he found that his excretion alone was not enough to meet the gas production needs of a biogas digester, so he had to give up this idea and did not use biogas. As an energy source.

　　 But even if biogas energy is not used, biogas digesters can still be used as an important sewage treatment method, which can effectively decompose the organic matter in the sewage and accelerate the recycling of water resources.

　　 Just the smell of the fermentation tank used for sewage treatment...

　　 The smelly socks that haven't been washed for a month in the boys' dormitory are compared with the fermentation tank that hasn't been opened for a month. This is probably the difference between stinky tofu and canned herring.

　　 That sourness...Chen Xin went in with his gas mask, but still almost all the tears came down.

　　 Fortunately, the sewage treatment tank is outside the container room, and Chen Xin has turned on the forced ventilation after taking into account the smell of this thing, so the smell will not permeate the entire shelter.

　　 The recycled sewage that had been fermented for a month was packed into the planting greenhouse by Chen Xin in plastic buckets prepared in advance, and then poured into the soil one by one.

　　 Although the taste of this thing is really sour and refreshing, it has to be said that nature is a complete cycle. It is the organic matter that is decomposed that can make plants thrive.

　　 After fertilizing, it was watering. However, what surprised Chen Xin today was that when he watered halfway, there was no water in the pipe.

This shocked Chen Xin. He hurried to check the water tank and sewage treatment tank, and found that his water tank that could store three tons of fresh water was empty. UU reading www.uukanshu.com and the sewage collected in the sewage treatment tank was only half. Full state.

　　 Looking at the empty water tank, Chen Xin couldn't understand why the water vapor in the air was collected by the sewage treatment tank and the water circulation system, and the water was still used up.

However, if there is no water, there is no water. Although there is still a lot of drinking water for drinking, only two and a half boxes of purified water are used, and there is still a lot of inventory, but the domestic water and greenhouse water for planting have been exhausted. Up.

　　 Now Chen Xin must find a way to replenish fresh water, otherwise he will fall into a crisis of water shortage, or use stored drinking water to supplement domestic water.

　　Using drinking water to supplement domestic water is the last choice made when there is no other way, but Chen Xin would not do it when there are other choices.

　　 Without using drinking water to supplement domestic water, Chen Xin has only two options.

　　 First of all, Chen Xin can choose to take the risk to open the door of the refuge and go out to find fresh water resources.

　　 One month has passed. The fire caused by the meteorite impact should have been extinguished with the gradual drop in temperature after the sky was covered by dust over time. It should not be too dangerous to leave the refuge now.

And this in itself was one of Chen Xin’s original plans. One month after entering the shelter, he opened the shelter and went out to install the antenna of the shortwave radio station. At the same time, he could get in touch with the companions of other survival groups. Several companions in the city exchanged supplies.

　　 At least Chen Xin can be sure that a companion in the city didn't plan to plant a greenhouse. Bringing fresh vegetables in the past can exchange a lot of things with her.

　　 But there is a problem with this, and that is how Chen Xin should bring fresh water back.