Lunch was served in the small courtyard where Ma Yilong lived.

Of course, the protagonist on the table is the potato, Zhao Hao is ready to boil the big potatoes to taste the taste, and the small potatoes are used for stewed beef.

What, where did the beef come from? This head is drowned, serious face.

The cattle in Kunshan County are so miserable that they are killed by diseases and accidents every day......

It's a pity that the tomatoes and peppers are not ripe yet, otherwise there will be another tomato scrambled egg, spicy chicken, and rice.

While cooking, the cooking utensils in Mr. Meng He's room attracted the attention of the two children.

"Master, come and see, Mr. Meng He's stove is amazing, he doesn't need to light firewood, and he can boil the water without seeing the fire." The two children ran in, and Fei La Zhao Hao went to the room to have a look.

Zhao Hao had no choice but to follow, and saw that on the red brick stove, the kettle was already boiling.

There was no fire under the stove, only a brass pipe made a slight sound, and the water was boiled.

It's no wonder that the two children made a fuss, and whoever saw this scene would also shout invincible...... Oh no, it's incredible.

Zhao Hao asked people to close the door, and the light in the room dimmed, and a blue flame appeared under the stove, jumping happily at the mouth of the copper pipe.

"It turns out that there is really fire, it is strange that I have to let the ...... touch" The two children were so shocked that they were a little scared: "Master, is this a witchcraft?" ”

"Nonsense, it's science!" Zhao Hao rewarded the two of them with two violent shocks, and just wanted to say that he didn't even understand this, and he was worthy of being my apprentice? Only then did he think that these two were still second-grade elementary school students, so he sighed helplessly, and patiently explained to the two of them what biogas is.

The one used by Ma Yilong is the 04 Institute of Xishan Island Research Center, which developed a hydraulic biogas digester according to Zhao Gongzi's "Elementary Chemistry" textbook.

It connects the hut, the pigsty and the digester. The digester is a cylindrical concrete structure with a movable cover plate on top, so that human and animal manure and kitchen waste can be directly cleaned into the tank for fermentation.

There is also a small water tank, which is connected to the digester via an outlet pipe. When the gas is produced in the tank, the pressure continues to increase, and the material is hydraulically poured into the water tank, which will raise the liquid level of the water tank. Turn on the biogas switch when using gas? The biogas can then be discharged under water pressure, and the liquid level of the tank will naturally fall.

In this way, relying on the rise and fall of the material liquid in the water tank, the air pressure in the tank can be automatically adjusted when the gas is produced and used. So as to ensure the stability of the output firepower.

This thing doesn't have any technical threshold, it all depends on organic matter in an anaerobic environment? Combustible gas is fermented to boil water for cooking and lighting.

And biogas slurry can also be used as a pesticide, fertilizer and feed additive? The last biogas residue is still a good fertilizer...... The fertilizer taken out of the digester is three to five times more efficient than ordinary compost!

And what else is important? Because it is a confined space, it is not easy to breed mosquitoes and has no smell? It is a big killer to maintain rural hygiene. This plays an important role in eradicating common infectious diseases in rural areas, such as schistosomiasis and hookworm disease.

Therefore, Qu Rukui, the director of the 04 Institute, thinks that this thing is like a heifer taking a plane - Niu Boyi has gone to the sky. I got it out last year in my spare time. After the test had no safety problems, how many sets were installed in Kunshan Agricultural College? I want to listen to the professional opinions of Ma Yilong and the agricultural technicians to see if there is any possibility of promotion in rural areas. This is the only way to go from the lab to the factory.

Ma Yilong and others also thought this invention was very good. It's just that the problem is not small. One is to use a copper pipe with a valve to transport gas? A simple glass manometer is also installed next to the water tank? The cost is too high? Farmers are afraid that they will not buy it.

No matter how many benefits you have, you can't stand other people's firewood everywhere. So it's definitely not expensive.

04 The institute switched to the use of treated bamboo instead of copper pipes. The barometer was also eliminated, and a pullable bamboo strip was loaded into the water tank to judge the air pressure by the water level? The cost has been successfully reduced.

Again? The College of Agriculture also found that this thing is good, but it smells very bad when burned, and it is uncomfortable to smell too much.

This is normal, because biogas contains a small amount of hydrogen sulfide in addition to methane, which is colorless and odorless. When Zhao Gongzi visited sulfur making on Iwohuang Island, he smelled the smell of rotten eggs, which was also caused by this thing.

But it doesn't matter, between the gas outlet of the biogas digester and the gas pipe, add a section of bamboo tube desulfurizer filled with activated carbon and iron oxide.

Activated carbon comes from dry distilled wood and has a strong adsorption effect, which can purify the biogas. Iron oxide is rust, which reacts with hydrogen sulfide to form iron sulfide, leaving sulfur atoms in the desulfurizer. This is one of the most common and efficient methods of desulfurization.

And when the user repeats the unpleasant smell, as long as the desulfurizer is removed for ventilation, the iron sulfide will react with oxygen and reduce to iron oxide and sulfur, and it can be used continuously.

Until the desulfurizer turns completely yellow, you can contact the staff to change the material. This step is free of charge as pure sulfur can be recovered from the desulfurizer......

~~

In short, the biogas with the addition of a desulfurizer is still very suitable for use. Especially in the southern region, where the temperature and humidity are high, a biogas digester can be used to boil water for a family of six to cook and light the lamp.

Zhao Hao thinks that the next step is to find a few farms in the county and pilot them on a small scale to see how the feedback from the farmers and workers is. If there is no problem, it can be promoted in the thousands of farms under the group's jurisdiction, and this business alone has been done. When thousands of farms are used, the biogas digester will be popularized in Jiangnan, and it will be much easier to promote it to ordinary people.

Leaving the room, the two children were curious to see the biogas lamp. Shi Jizhi took them to the study. In fact, the biogas lamp is to add a glass lampshade to another pipe nozzle, and of course the effect cannot be seen during the day.

But according to Shi Jizhi, at night, this light can illuminate the entire room as bright as day, and the two dolls were dumbfounded. I think it would be happier to be able to study in this house...... Therefore, the top student is really underbeaten.

Zhao Hao felt that the brightness of the biogas lamp was average, and it was not as good as the calcium carbide lamp. Shi Jizhi They think it's really bright, because they haven't seen it, what is really as bright as day......

The main brightness of the biogas lamp in later generations actually came from the lampshade.

The lampshade, which emits a dazzling white light when heated, is made of linen mesh soaked in thorium persulfate. The flax is easy to play, but the thorium thing, Zhao Gongzi only knows that it is extracted from the solitary stone. But he had never even seen monazite, and he didn't know how to prepare it. So I had to let them blow a glass cover first.

In fact, you don't need to wear a cover, and I haven't seen anyone add a cover to the candlestick. Therefore, the glass cover can be added to the premium version set together with copper pipe fittings and glass barometer, which is specially selected by large dog owners. Although the price is much more expensive, what the rich want is the feeling that the poor can't afford it, and he doesn't pay for it......

~~

Half an hour later, it was finally time to eat. The small potatoes are smooth and sticky, and the beef stew is even more fragrant and makes the children next door cry......

Zhao Gongzi took a bite, and the tears of anger were about to fall. It's the taste of my hometown that I can't go back to.

"This thing can really be used as a staple food." Thanks to Zhao Gongzi's blessing, Fu Shi Jizhi still ate potatoes for the first time, and he couldn't help himself with the new taste.

"Well, better than corn." Ma Yilong nodded and said, "If the output is raised, maybe this thing will save Daming in the future." ”

Zhao Hao smiled and didn't refute, the old gentleman is this age, it's good to think like this.

He slowly peeled the small potato chips, and after calming down, he changed the topic and said, "By the way, there is something that I don't know if Mr. has heard of?" ”

"What's the matter?" Ma Yilong gulped down the rice.

"This month, the group received reports from several counties in Huzhou and Jiaxing that a terrible silkworm disease was spreading on farms." Zhao Hao said in a deep voice, this is his real intention today.

"It's two, not one. And it's not this year, it's the year before that. Ma Yilong swallowed a mouthful of rice, picked up a handkerchief and wiped his mouth: "The first silkworm farmers in Tongxiang County, Jiaxing the year before last, discovered that the silkworms they raised were fine the day before, and most of them died the next day. Even those silkworms that have successfully formed cocoons produce less than half of the normal state. However, at that time, the price of silk was low, and no one except silkworm farmers would take it seriously. ”

"Last year, silkworm farmers in Wukang County, Huzhou, found a strange disease, and some silkworms had black spots on their bodies. This silkworm is slow and weak, picky eater, and prone to early death. The same one is found, and it will soon spread, and then a large number of silkworms will die. "Ma Yilong is the most authoritative agricultural expert in Jiangnan and even in the Ming Dynasty, and it is obvious that someone has already reported the situation to him. And he's been paying attention to it.

"But at that time, what kind of Jiangnan textile did you, I wish I could collect less silk, and naturally it will not be reflected to you." He sneered and glanced at Zhao Hao and said: "At that time, the common people had a poor harvest, and your people only cared about harvesting silk at a low price, and they didn't care about the miserable situation of silkworm farmers at all. This is this year's sea trade through, the demand for raw silk has skyrocketed, and finally the silkworm is sick. What a good man! ”

"In the initial stage of the group, a lot of work is not in place, and people's concepts have not been reversed." Zhao Gongzi said in his heart that it was no wonder that Ma Yilong was so easy to meet again, and he always scolded me. It turned out that he had been dissatisfied with Jiangnan Textile for a long time.

He knew that with the profiteer style of Liu Zhengqi's gang, he would definitely not complain about his scolding. I had to sneer: "I will pay more attention in the future." ”

"Well, of course, you're much better than those rich dogs. But you can't compare to them, can you? Ma Yilong said it happily, so he accepted it when he saw it, and preached back to the truth: "Usually, silkworm disease will not be transmitted to the next generation. But these two diseases are evil, and they are here again this year, and the scope has expanded to six counties at once—in addition to Tongxiang Wukang, there are also four counties adjacent to them, which have also broken out. ”

"The spring silkworms in these counties are already in vain, if you don't want to control it, not only the summer silkworms will be finished, but also it is likely to spread to all the counties in Jiaxing and Huzhou." Saying that, he said with a stern expression: "Next year, it is possible that there will be an outbreak in the entire Jiangnan, and by then, you will have nothing to collect!" ”