Regarding Lan Liru, Qiao Jiayue observed for a few days and was sure that the other party would not have any impact on her family, so she gave up.

During this time, the members were busy with spring planting, Qiao Jiayue and Qiao Hongyuan were not idle, and they were drawing design drawings in their free time.

As for their own biogas digester, how to design an indoor toilet and make the toilet communicate with the biogas digester, under the limited conditions, the brother and sister's hair had to be pulled out.

The brother and sister couldn't find inspiration, so they sat in front of the door and basked in the sun.

If the tools and materials are complete, what do they need to worry about?

Qiao Jiayue held her chin, her eyes inadvertently swept over the adobe in the corner, and a flash of inspiration flashed in her mind, "Second brother, look at that yellow mud and straw, isn't it very strong?"

The houses of the brigade are all made of stone as foundation walls, and then mud is built on them, and good houses can be built for hundreds of years.

"Huh, what do you think?"

"Can you make something out of yellow mud and straw instead of cement?"

Qiao Jiayue entered the system mall, quickly entered the word substitute cement, and found that there were really a lot of formulas.

"Second brother, I have found many formulas, do you think you want to buy them all?" Qiao Jiayue asked in a tangled manner, there are a lot of stars needed.

"It's easier to buy and make it. Qiao Hongyuan said, after all, their current environment is really not suitable for any too complicated methods.

After a while, two pamphlets appeared in Qiao Jiayue's hand, she stuffed one into Qiao Hongyuan's hand, and the two of them buried their heads in reading it.

"No, I can't. Qiao Jiayue closed the booklet in frustration, "This book needs to be calcined with fire, it's too troublesome." ”

"It's the same with me. Qiao Hongyuan waved his hand and said, taking the book in Qiao Jiayue's hand and looking seriously.

"Isn't there a better way?" Qiao Jiayue sighed, she knew that the easier the things to use, the more complicated the steps needed.

Qiao Hongyuan shook his head, "I don't think these two methods are bad. “

"As mentioned above, compared with cement, they are not bad, with little pollution, convenient materials, simple production, and low cost, which is too suitable for us. ”

"And don't forget, our brigade has a tile kiln! as long as we set it up and put it in the kiln for calcination, that's enough. ”

"Second brother, let Abba make a decision on this, we definitely can't do it. Qiao Jiayue said tangledly, when it comes to the tile kiln, this is not something that the two children can decide.

They thought that Father Qiao would agree with their idea very much and put it into practice immediately.

However, Qiao's father refused, "These two can't be taken out yet, when we don't have a backer." ”

"Why?" the brother and sister asked, puzzled.

"Cement is very important, it can be said to be a necessity in the construction project, it is in the hands of the state. Qiao's father squatted down and took the two children to reason with them.

"Try to think about it, in such a remote small place as ours, there is a formula that can replace cement, what will make the people above think?"

Qiao Jiayue pouted in frustration, she knew that things would not go so smoothly.

Qiao Hongyuan thought about it very seriously, "Then when does Abba think it's a good time?"

He laughed, "It won't be too far, you Uncle Lin will help arrange it." ”

Lin Guoping said that he would arrange a few people to join the Alpine Brigade, and there will be a ten-year movement in the future, and there will be more old professors who have been decentralized.

As long as Lin Guoping uses some means to get all of them to the brigade, at that time, these things can be released through their hands, which is not only a cover for these things, but also a layer of protection for those people.

"But by then, the recipes may not be able to bear your name, do you mind?"

The brother and sister shook their heads at the same time, "We didn't invent them in the first place, and if it's safer to use this method, we'll wait another two years." ”

"So let's just work on the digester now, I remember it was mentioned on the radio, and it's not a shocking invention. ”

Qiao's father smiled with satisfaction, he knew that his children were smart and sensible.

In fact, as soon as this formula came out, it was enough to cause earthquakes in many places, and there was no other country in them.

This recipe is definitely the most reasonable to come from the hands of dozens of old professors.

Father Qiao thought that his daughter had other good things in her hand, he squinted, there are some things that must be planned in advance.

In mid-April, the biogas digesters of the four teams were the first to be completed, and the people from the other production teams watched the excitement.

The excrement from the original septic tank has been transferred to the newly built septic tank.

These septic tanks are designed to be stepped in a stepped shape that allows for artificially controlled flow into another tank.

At this time, the fermentation flora that Qiao Hongyuan had been cultivating finally appeared in front of everyone.

That small bottle of something that can't be seen clearly is said to promote the fermentation of feces, and everyone is curious, is it really useful?

Qiao Hongyuan poured the bacteria into the biogas digester, and soon, the pond was closed again.

Everyone stood on the sidelines, staring curiously, but an hour passed, and there was no special movement in the pool.

This biogas digester was able to succeed in the end, and the biogas pipeline was specially obtained by Qiao's father to Liu Dongyang for help, and it took a lot of trouble to get it.

If I want to buy pipes again in the future, I am afraid that I will have to start from the sea market, and I can send some packages to the Du family after a while.

The biogas produced by this digester is later used to cook pig food, but it can save a lot of firewood.

After the digester was built, at first, everyone didn't feel anything, but soon, people closer to the pigsty noticed that the smell seemed to disappear.

After all, when the temperature is high, the smell in the manure tank is fermented, and the wind blows, and the smell is really unbearable.

When the members went to the pigsty again, they found that Qiao Liu'an had lit the slender pipe mouth, and a blue and yellow flame was dancing at the bottom of the pot.

In the biogas tank, you can still hear the sound of things tumbling and stirring, and everyone is amazed.

In April, when it was warm and cold, there were many fewer mosquitoes and flies in the four teams, and the members were very happy.

After observing for a while and understanding what was going on with the biogas, the other production teams agreed to build a biogas digester and worked overtime, and it was ready in about a week.

As soon as the bacteria are put into the digester, they will multiply on their own, and the excrement after decay will settle down, and when the time comes, the biogas digester will be opened and swept to the next pool, at this time, these decomposed products can be directly picked up for fertilization.

The smell is gone, there are no bacteria, insect eggs, etc., and no one dislikes the most disgusting task of picking up feces in the past.

When the biogas digester of the four production teams is done, it will be the turn of each family, and the team does not force it, after all, if you want to do the biogas digester, you need to pay for materials and labor, but it is a big expense.

And when it comes to money, there are always people who oppose it.

Anyway, Qiao Jiayue and her brothers and sisters wished that their biogas digester would be built as soon as possible, and they invited more than a dozen people to be busy for a few days, and then they could be put into use after drying in the shade.

After the digester is ready, there is no need to be careful about feeding the pigs and going to the toilet.