Let's continue to talk about the problem of fertilizer.

When it comes to fertilizer, we still have to start with the biogas digester, why do we say that the cost of the biogas digester is high.

In fact, the cost of the pool is not high, but the ancillary facilities, such as the pipes, all the pipes, are made of copper air ducts.

Or the nozzle of the blowtorch is made of gold, because of technical reasons, so you can only use precious metals, and the biogas bulb, but it is made of asbestos, and this asbestos, that consumes a huge amount of manpower.

Because they are all their own people, Yang Qiao is worried about what diseases they will get in the future, and there is that this asbestos can also be used in other places, such as making gaskets in high-temperature and high-pressure places, such as in steam engines, so this asbestos, from mining to processing, belongs to a one-stop industry, however, because there is no current technology.

It can also prevent the harm of the fine asbestos dust to the human body and lungs, which is a special thing from protective clothing to masks.

You see, it's just such a small biogas digester, just this auxiliary equipment, so I said that this auxiliary equipment can be used in other places, but it's always because of the biogas digester.

The cost is nothing.

However, the digester has the advantage of taking advantage of the favorable terrain.

There is a small waterfall under the hot spring, Yang Qiao is taking advantage of this drop, and built this cement building, but the cover of the door is made of metal, the purpose is to heat, that is, to let the water of the hot spring flow through it, so that this biogas tank can keep a certain temperature unchanged all year round, so this gas production is much more stable.

Especially this biogas lamp, but there are many benefits to planting greenhouse vegetables, you know, this biogas lamp, is not the electric lamp or something, it, can consume oxygen, in fact, this is also the old Wang's subordinates accidentally discovered, said, this through the biogas lamp of the vegetables, it seems that the yield is particularly high, later, after there is a generator, Yang Qiao also let them use electric lamps to illuminate the test, the result, is still the same.

Naturally, these agricultural workers don't know what the reason is, but Yang Qiao knows that this biogas lamp, when it is lit, needs to burn the oxygen in the air to do so.

"What's the reason, this, I'll explain it to you, you can't understand it, that's okay, don't we have a chemical laboratory over there, you let them study the ingredients in the air first, maybe, they can't study it thoroughly, but they can generally say one, two, three, four."

This is Yang Qiao's answer to them, it is true that ordinary students in later generations can know what oxygen is and what nitrogen is, but at this time, if you explain oxygen to them, it is better to call it angry, it is a gas that can make people live.

Really.

"Lang Jun, Engineer Wang, we generally know some of the qi in the air that you asked us to study, and we have given it a name, one is called Qi, which is the Qi that can survive."

Sure enough, they called it angry. Maybe it's the difference in the way of making or experimenting, naturally, this name is different, in later generations, the first person to discover oxygen, actually called oxygen phlogiston, and called angry, what's the point, besides, this is not the final definition.

"Lang Jun, however, in this air qi, there is another kind called death qi, that is, if people inhale too much, they will die, so it is called dead qi."

"Okay, have you written down the experimental procedures?"

"Well, I've written it down, Lang Jun, do you want to read it?"

"Don't do it, you continue to research, what is this angry, lifeless, just set up a special research branch, it's called the Air Research Laboratory, Wei Ye, this, you are responsible for granting them the money for research, this is an industry that consumes money, but does not make money, maybe it can make money, but I don't know if they can see it."

"Lang Jun, this?"

Wei Ye was a little embarrassed, but the engineer who studied this gas was very happy, they were really a little addicted to the study of this gas, yes, no matter what, once you put yourself into it, you will naturally feel particularly interested in something, if you are interested, you just have to unlock its secrets, if you can't solve it, it will naturally be uncomfortable day and night.

"Why, don't listen to me, in themselves, don't you see, we have some things, we didn't make money before, this slowly, don't we all make money, besides, we make money is interference, naturally we are doing something beneficial to mankind."

"Lang Jun, you are so great."

On the side, Engineer Wang, who was in charge of grain and vegetables, was stretching his thumb.

"Great, not necessarily, but the ancients said, the poor are good alone, and the good are good for the world, this is just what should be done, not why only I am doing it, but others don't know how to do it."

Yang Qiao is a little modest in this regard, but what he said is also right, some people want to help the world, but he has the heart and is powerless, yes, there are many copper coins, but what to do, but, people with ideas have no money in their hands, that's it.

"By the way, and what about you, since you have studied the composition of the air, you can go to the greenhouse and test it to see what is different from the outside of the greenhouse."

This, Yang Qiao is just a proposal, nothing else, I won't say anything, maybe, for this reason, the science and technology tree, will form a new branch, you know, this science and technology tree, but there is no planting, and chemical branching, because of this, it is also the reason why Yang Qiao decided to return to the countryside to study this kind of dish.

That's all there is to explain about gas, let's go back to biogas!

Originally, it costs a lot of money, so I don't care about spending more on this biogas digester, so in the inlet and outlet, porcelain elbows are used, plus copper valves, which can be well sealed, and to ensure the cleanliness of the inlet, the outlet, needless to say, the fermented biogas residue, what else can be said, and there is a fixed partition in the biogas digester, which will allow the new feed to be separated from the biogas residue that has been fermented and gasped.

"Lang Jun, you see, your outlet, and this biogas digester, the design is really good, this biogas residue, biogas slurry, smell, there will be a faint fragrance, not the smell of manure."

"Ugh!"

On the side, Wei Ye wanted to vomit a little.

"Uncle Wang, how dirty is this?"

"Dirty, not dirty, at first, I thought it was dirty, but later, I slowly found out that this is really not dirty, although this human dung and other cows, sheep and pigs have dung, but we found that this is even cleaner than the cow dung, you know, the cow dung smells, and even burns, and there is a smell of dung, and this."

Naturally, the so-called fragrance he said is the smell of the biogas, but the smell of the biogas, especially the fully fermented biogas residue, is naturally different, however, Yang Qiao estimates that this should be the relationship between the partition, yes, in the previous life, the biogas digester, when discharged, it may be mixed with newly added manure, but this, because of the partition, is naturally different.

"Moreover, Lang Jun, this biogas slurry, biogas residue, can not only be used as fertilizer, but even this biogas slurry can be used as medicine, which can prevent some pests, if you use herbs to prevent and control, it will make some natural enemies of insects dare not come down, but, this, it doesn't affect those little birds or anything."

This is the difference between pesticides and traditional Chinese medicine, and this biogas slurry.

The pesticide, if hit, the bird or something will eat, unless the smell is too big, but, it will have an impact on the bird, but, traditional Chinese medicine, born with a smell, this bird or something, will naturally stay away from these insects, but this biogas slurry is different, this is also an accidental discovery.

"Lang Jun, and this gas production, it is very large, no, almost all the workers in the vicinity, as well as their families, will come here to take a bath, Lang Jun, your bathhouse, built really well, no matter winter or summer, people will have hot water to bathe, summer, after washing, go back and don't feel hot, winter, washing, it will make people very comfortable."

This is considered a welfare, Yang Qiao imitated the bathhouses of later generations, built so many bathhouses, and naturally divided them into men and women, but the fuel for boiling water is this biogas, and then, add the water of the hot spring.