After the great success of greenhouse planting, the leaders of the base sorted out the technical data and reported it to the central government, and Yao Huang was rewarded by Chairman Mao, but she was not as excited about it as others. After the food problem was solved, Yao Huang focused his energy on improving the water supply at the base. She didn't know what to do, and the central government promoted the greenhouse planting technology throughout the country, especially in the north, so that she could finally eat fresh and green vegetables in winter. Greenhouse planting technology has accelerated China's agricultural development for thirty or forty years.

Although there is a water source near the base, it is salty water mixed with sand and gravel, and people will have diarrhea and abdominal swelling after drinking it. However, clean water must be used during the experiment to not easily affect the results of the experiment, which leads to a serious shortage of water supply to the base. In order to ensure the smooth progress of the experiment, the soldiers in the base had to work overtime every day to transport fresh water to the plains hundreds of miles away. During the day, the sun was extremely exposed, and the soldiers were reluctant to drink the fresh water on the car, most of them were seriously dehydrated, and some of the soldiers had their skin peeled from the sun. But the soldiers never stopped carrying water for a day, day and night, when they were tired, they took a nap in the car, people did not stop the car, wore cotton jackets in the morning and yarn in the afternoon, and absolutely delayed the fresh water supply of the base.

Yao Huang felt sorry for these soldiers, they were a group of young people who were only seventeen or eighteen years old, but their skin was rougher than that of old peasants who were forty or five years old, forty or fifty years old, yellow, purple, black, red, and blue, like a palette, miserable. The water brought back by the fighters was only enough for the experiment, and the daily water used at the base was still salty water that was difficult to eat. Yao Huang was fed up with these salty waters, and when he first came, he had been drinking these people for two whole days, and the whole person was almost dehydrated. If it weren't for the powerful elixir in the space. Maybe she's going to say goodbye to this world.

To turn salt water into fresh water, the only way Yao Huang could think of was distillation. This method is time-consuming and fuel-intensive. It consumes a lot of energy and produces a lot of pot scale. It is difficult to produce fresh water in large quantities. However, Yao Huang knows that the other two saltwater desalination methods in Langdao are even more impossible, and the electrodialysis desalination method and the reverse osmosis desalination method both require specially manufactured "thin films", and the two special thin films cannot be produced at all with the current technology of the country. After thinking about it, I still have to choose the "old" distillation method. Yao Huang's third uncle opened a pure water company, so she had the opportunity to visit the production line of pure water, and had a certain understanding of the production equipment of pure water, so she locked herself in her room for one night and designed a simple set of purification equipment. Still paying for it himself, Yao Huang asked the leaders of the base to help him find someone to make it.

Because of the success of greenhouse planting. The people in the base admired Yao Huang, and seeing that Yao Huang had a new idea, the leaders of the base all actively supported it, and not only in a month, but also the simple purification equipment was sent to the base.

"Comrade Yao, can this thing really turn idle water into fresh water?" Director Zhao, the logistics leader of the base, circled around the equipment twice and asked with uncertainty.

"I'm not sure, I'll try it when I'm installed, if it doesn't work. I'll improve it again. Yao Huang instructed the soldiers to install the equipment, and took the time to answer Director Zhao's words, and the eldest sisters and sisters-in-law of the logistics team gathered around to watch, and they wanted to help. It's a pity that the strength is not as great as that of the soldiers, so I can only do some small things such as handing wrenches on the side.

Thanks to the efforts of the soldiers, the purification equipment was finally installed. The purification equipment is divided into three parts: filtration equipment, distillation equipment and condensing equipment. The filtration equipment is composed of two parts: quartz sand filter and activated carbon filter. It is used to filter dust, humus and bacteria from raw water. Most of the sands in the desert come from the residual minerals of weathering sandstone and granite, and the main component is quartz. There is also a small amount of feldspar and muscovite, which are just used as raw materials for quartz sand filters; There is no activated carbon base inside. It can only be replaced with charcoal. At the top of the distillation equipment is a solar stove with a large lid, the sun in the desert is strong, the solar energy is abundant, and it is environmentally friendly and fast to distill, which is much better than using other energy sources. The last is the condenser tube, which does not have much technical content, but it is very material-intensive.

Raw water is poured from one end of the inlet into the purification plant, where it is filtered, distilled and condensed, and the pure water flows down the outlet pipe into the barrel that has already been attached below. Soon, a bucket of water was filled. Yao Huang scooped up a spoonful of water with a gourd spoon and took a sip......

"How?" Director Zhao asked eagerly.

Yao Huang handed the spoon to Director Zhao and motioned for him to take a sip and feel it. Director Zhao naturally hurriedly complied, and then he shouted excitedly, "Fresh water, it's fresh water, it's not salty at all." Comrade Yao, we have succeeded, and we have succeeded in purifying fresh water. ”

The people and soldiers of the surrounding logistics group cheered when they heard this, and one by one they rushed forward to taste the pure fresh water they had produced. The researchers in the laboratory were also alarmed, and after drinking the water, Professor Yuan asked a researcher to fill a bottle of water and go back for testing, and found that it was purer than the fresh water from the plains, and Professor Yuan offered to give them the pure water produced every day for experiments.

"Comrade Yao, the base has decided to make five more purification equipment. Now can you sell this to the base? The base will pay you two tiers higher than the original price. Director Zhao found Yao Huang after the purification equipment was able to work stably and offered to buy the equipment.

Yao Huang naturally doesn't accept money, there are so many valuable things in her space that she doesn't care about such a little money. What's more, what is advocated in today's society is "communism", and if she really reaches out to the base to ask for money, she will definitely be despised by everyone.

"No need, this purifier is what I donated to the base!"

Yao Huang's attitude made Director Zhao and the leaders of the base very satisfied, and they took more care of her and Song Tianpeng in their future lives.

After the installation and use of the other five purification equipment, the water consumption of the base has also been greatly improved, and most of the pure water produced by the six purification equipment every day is used in experiments, and a small part is used in life. Fighters no longer have to work overtime to carry water to distant places. They went to carry water every two days, and the time was chosen in the evening, so that all the skin diseases of the soldiers were cured.

"Comrade Yao, this is the cactus you want." Battalion Commander Zhang delivered a wagon of cacti to the door of Yao Huang's dormitory and instructed the soldiers to unload the cacti from the car.

"Thank you, Camp Commander Zhang." Yao Huang took out a pot of boiled mung bean soup and poured a bowl for each soldier. The sweet mung bean soup lifted the spirits of the soldiers.

"Comrade Yao, each of these cacti is one meter tall, you will definitely not be able to grow them alone, I will leave these boys to help you."

"Thank you, Camp Commander Zhang." Yao Huang said happily, with such a big cactus and so many cacti, she really couldn't handle it alone.

Battalion Commander Zhang left five soldiers to help Yao Huang, and in one afternoon, the soldiers planted more than 20 cacti around the dormitory. In order to thank the fighters, she left them to eat at home. Although there is a cafeteria at the base, family members occasionally open fire in their dormitories to cook some hometown food. Yao Huang wrapped the dumplings stuffed with mutton and made a few side dishes, which made the soldiers very happy. When the soldiers left, Yao Huang specially packed two large pots of dumplings for them to take back to the dormitory to share with Battalion Commander Zhang and the other soldiers, thanking them for their help.

Song Tianpeng came home late from work, and was almost startled by the cactus outside the gate. At night, the half-human-tall cacti look like monsters with teeth and claws under the cover of the night.

"Sister Erya, why did you grow so many cacti?" Song Tianpeng patted his chest to soothe the frightened little heart.

"There are too few green plants in the base, so I use more cacti to beautify the environment." Yao Huang threw the dumplings into the boiling pot, and watched the white and chubby dumplings float from the bottom of the pot to the water, Yao Huang quickly fished them up.

"Is there garlic?" Song Tianpeng asked.

"No, you can peel two of them yourself." Yao Huang couldn't stand the smell of garlic, but Song Tianpeng liked to eat garlic.

"Sister Erya, you plant so many cacti more than just greening, right?" After decades of getting along, Song Tianpeng knows Yao Huang better than anyone else, she never does meaningless things, and what she does will inevitably play a huge role in the future. Song Tianpeng sometimes wondered if Yao Huang was the sage he saw in the story who could predict and see the future - buddy, it was the truth.

"Hehe, only cacti are the best plants in the desert, why don't I plant them?" Yao Huang said with a smile, she did have a purpose in planting cacti, but she couldn't say it now.

"Cactus can clear heat and detoxify, relax tendons and activate the nerves, disperse stasis and reduce swelling, detoxify the intestines, cool the blood and relieve pain, moisten the intestines and stop bleeding, strengthen the stomach and relieve pain, suppress cough, and can also treat snake bites, burns and children's cheeks, it is a good medicinal material."

"Well, well, I do fancy the medicinal properties of cacti. Anything else? ”

"Cacti have the function of storing water."

"Yes, but now there is no shortage of water at the base, and this can be ignored. Anything else? Yao Huang brought the boiled dumplings to the table, and another person served a bowl of dumpling soup.

"Sister Erya, don't test me. I really don't know what else the cactus is for, and I don't guess your intentions, okay? Song Tianpeng hurriedly said goodbye.

Yao Huang chuckled, "Cactus can still be eaten as a dish, it can also be beautiful, and it has many functions, so if you want to have a variety of cactus, it won't cost much water anyway." ”

"Can cacti really be eaten?" Song Tianpeng asked with some disbelief, the cactus is covered with thorns, can it really be eaten?

"Why don't you believe what I say?" Yao Huang said, "Next time, I will use cactus to cook for you to taste." ”

"It's not poisonous, is it?"

Yao Huang raised his eyebrows, "You can choose not to eat!" (To be continued......)