After the Dragon Boat Festival, the weather was hotter and the place in Changle County became more and more lively day by day.

In fact, it is not just Changle County, but Jinchang and Dunhuang have also been quite lively recently. Although there are no biogas lamps in their places, after they bought lanterns and oil lampshades made of thorite from Changle County, the lighting conditions are really much better than before.

As the lighting conditions improved, the world seemed to become very alive all of a sudden. It seemed that it had been through a long and long winter day, and it was finally spring.

The lanterns and oil lampshades produced in Changle County are so easy to use. Everyone who has seen them is shocked and praised them. The news is naturally spreading quickly. Nowadays, not only are vendors from the surrounding towns, but also people from Liangzhou City come all the way to buy them.

Don’t look at the lampshade that only sells for a few pennies, it can’t stand the large amount. The newly opened lampshade, I don’t know how many cars of goods I have to sell every day.

After the Dragon Boat Festival, there were also many merchants coming and going. Luo Yong once heard a few idle people in the city joke that the wooden track from Jinchang to Jiuquan was not ready, and Guo Duhu could get his money back.

Speaking of which, Guo Xiaoke proposed to pave a wooden track from Jinchang to Jiuquan. If he only used wood and cement to pave a piece of money, the two governments in Jiuquan in Jinchang paid part of their money, and could only deal with it.

However, Guo Xiaoke said, since it is necessary to repair it, it will be better. There are several rivers along the way, so it is inevitable that bridges will be built. Ordinary wooden bridges are not durable and stone bridges are too time-consuming. Earlier, Luo used his disciples to build a set of steel and concrete bridges on the wasteland between Gaochang and Dunhuang. It was very good. It would be better if he had built that kind of bridge this time.

When officials from Jinchang and Jiuquan heard that how much iron would have to be used to build these bridges, they all complained to Guo Xiaoke, but they really couldn't get out so much money and food.

Guo Xiaoke was surprisingly easy to talk about this time. Jinchang and Jiuquan had no money, so he used his money and grain to give them first. Naturally, he paid a lot of money on this road, so he would definitely have to get the big head of the income from operating this wooden track.

Because of this wooden track, Guo Xiaoke has passed through Changle County several times recently, and his relationship with Luo Yong has eased a lot.

Seeing that the time was almost right, Tang Jian told him the truth. Luo Yong actually revealed the matter to him about the ore vein in Jiuquan, and he did not know it himself from that person.

"Since that's the case, why did you deceive me again that day?" Guo Xiaoke sighed.

"You were angry at that time. If I told the truth, I would not make you angry for nothing. I would probably believe that the mine vein was just a matter of fear." Tang Jian explained to him.

Guo Xiaoke actually had some speculations about this matter over the years. Luo Yong is unusual, and it seems that he has some knowledge of astronomy and geography. Perhaps as he himself said, after he got sick, he became enlightened.

Last year, Luo Yong went to Yiwu to look for thorite and finally made a biogas lamp. How did he know that there is a stone over Yiwu? Since he could all know that there is a thorite in Yiwu, can he know that there are mineral veins over Jiuquan?

Thinking of this, Guo Xiaoke believed that the possibility of mineral veins in Jiuquan was very high!

Even if his eldest son returns in vain this time, the Guo family will not easily give up on finding this ore vein.

Therefore, Guo Xiaoke was so enthusiastic about the road construction this time, and he also asked to build a steel and concrete bridge across the river, because in his idea, this road will be used to transport iron ore in the future, so the load bearing of the bridge is naturally very important.

During this time, whenever he passed by Changle County, Luo Yong was quite considerate. He had passed his spirit at this time. Now he knew that it was Luo Yong who told him where the ore vein was, so he was naturally grateful.

In this way, County Magistrate Luo and Guardian Guo reconciled again.

Later, Guo Xiaoke proposed to ask Luo Yong to build a biogas pool in Gaochang. Luo Yong told him that biogas is toxic and flammable and explosive, which is more dangerous.

Now he has not figured out the characteristics of this biogas and dared not spread it rashly. It would be better to wait for him to figure it out first and accumulate some experience, and then promote it to Gaochang and other places.

"How long will it take?" Guo Xiaoke was a little impatient when he heard that he refused again, but what he said was not completely unreasonable.

In ordinary cellars, there are cases of suffocation, not to mention their biogas pool, which specializes in fermenting feces, urine waste, and refining miasma to burn lights. In the eyes of people of this era, biogas is similar to miasma.

In this way, the biogas is really a bit scary, but it’s economical. These people in Changle County only need three cents to light a biogas lamp for a month. If it is replaced with an oil lamp, it will not be enough anyway. Moreover, the price of this three cents per month may be profitable, which shows how low the cost is.

"It will only last one or two years at most." Luo Yong promised.

After a year or two, the biogas system in Changle County should be relatively mature. Some local people have more experience in maintaining biogas tanks and using biogas. Then they will be promoted to surrounding areas, which will be a natural thing.

In mid-June of the lunar calendar, the first biogas tank to be put into use no longer produces much gas, and there is a lot of waste residue in the pond. Even if new materials are filled, there will be no improvement.

So Luo Yong said that he would do a thorough dredging work for this biogas tank.

Biogas liquid and biogas slag will continue to produce biogas during use.

Among them, biogas liquid is easier to deal with. On the Machine House, a hand-pressure liquid pump was made earlier, which basically looks like a hand-pressure well in later generations.

When using it, just fix the liquid extraction pump next to the discharge port and place the Eucommia ulmoides hose connected to the pump body into the pool. Two or three young men take turns to take action. In half an hour, most of the biogas liquid in such a large pool can be extracted.

Every time they pumped the biogas liquid, the people nearby heard about it, and someone came to pick it up with a wooden barrel.

Nowadays, no matter what the city and countryside are in the countryside, every household has to grow some vegetables and vegetables in the yard. The biogas liquid is mixed with water and watered into the ground. Those light-colored green vegetable leaves can grow into dark green in a few days and are very fertile.

Some farmers in the suburbs need a lot of fertilizer, and many people drive donkey carriages into the city to pull them.

There was no fertilizer at this time. Because the land was small and there were many people, the area of ​​farmers planted was also large. How could there be enough fertilizer for such a large area? This is also a big problem. Some children came out to pick up manure for this.

The biogas liquid in the city is not expensive, and you can get it as long as you go. Sometimes there are too many people going there, so the officials will open the outlets of several other biogas pools to see which pool has a higher water level and then pump some out of that pool.

This is also what Luo Yong specifically advised. The biogas tank is cleaned up waste liquid and waste residue. Whenever nearby people come to take it, it is best not to ask them to return empty-handed. If they often ask people to travel in vain, there will be fewer people going to go later. They pumped so much biogas from the pond and no one wanted it. Where should they discharge it?

Although the biogas liquid is good to use to fertilize the land, if no one wants it, too much water in the pond will affect the fermentation. After it is discharged, it will flow everywhere here and there, which will also greatly affect the environment.

In the past few days, the No. 1 biogas tank has been silted, and it has also set up a liquid pump to extract the biogas liquid. After the biogas liquid has been roughly drained, the entire biogas tank has been opened and hung for two or three days.

Early this morning, several officials caught a chicken, tied their legs with twine and hung them in the biogas pool. After a while, they saw the chicken still chirping below, and they knew that the biogas in the pond had almost dissipated. So two or three people tied ropes on their bodies, one of them took an iron rake, and went down to the outlet to remove the biogas slag.

In addition, they set up a handwheel above the discharge port. The people below used an iron rake to rake the biogas slag into the dustpan, and then hung the dustpan on an iron hook hanging from the top. The people above shook the handwheel and lifted the dustpan the biogas slag in a few strokes.

There were already people waiting there next to them. At this time, someone helped to remove the biogas slag from the dustpan and dustpan from the hook, and brought it to the side neatly, pour it into the baskets they brought, or on the wooden cart. Some elderly people also came to get the biogas slag. Some young and strong people on the scene would help fill the baskets they brought with them.

While working, the people above should also pay attention to the movements of the people below. If someone feels dizzy and chest tightness, they will quickly change the person out. They are tied with ropes. Even if they are unable to walk, the people above can drag them out.

After working for an hour or two, everyone stopped to rest, let the pool below dissipate again, and then arranged for people to go down and dig. This time, they stopped after digging for less than half an hour, because the more they dig, the more the biogas became, and people felt uncomfortable after staying below for a while. For safety reasons, they stopped digging today, and the pool still had to continue dissipating.

Such a large biogas tank is so digging and stopping. When it is basically cleared, I don’t know how much biogas slag is dug out.

The residue in the pond was dug to a bottom, and finally some waste was left behind. Some new materials were added. It was summer now, and the temperature was high, and the biogas tank fermented very quickly. In less than a long time, this pond No. 1 could produce biogas again.

Speaking of which, the cleaning of this biogas tank is really troublesome. The pond is dirty and smelly, and it is quite dangerous. It not only makes people poisoned and suffocated, but also dare not light the lamp. It only puts a few bronze mirrors to refract the sunlight.

Due to these many inconveniences, many biogas tanks in later generations were abandoned. But the current era is different. At this time, people did not have electricity, oil, and natural gas. Biogas was already very advanced, convenient and cheap energy for them, so even if there were such many inconveniences, they would never be discarded easily.

This time, the biogas pool was cleaned up a lot of waste residue, and many people in the city also carried some of them home. Even the Magistrate of Tan Lao County took a few grandchildren to see the fun twice, and carried two loads of biogas residue back.

The biogas slag was dried in the backyard for drying, and then buried by them on the side of the sweet potato nest.

This spring, almost every household in Changle County planted sweet potatoes, but most families didn’t plant much. They took out the sweet potatoes from each of the chief’s families and sprouted them last year. Each household divided several tender branches and took them home and planted them carefully.

However, the Magistrate of Tan Lao's County planted a lot at home. At the beginning of spring, it was only the people in Changle County who had sweet potato seeds. Farmers outside the city and from various towns below would inevitably have some complaints.

At this time, Luo Yong took out many more sweet potato vines. He was reluctant to throw them out last year and carefully stored them. Although the leaves were all dried up, the vines still looked green. Cut these sweet potato vines into small pieces and distributed them to each village under Changle County, so that the villagers could see them all, and perhaps they could still grow them alive.

It was at that time that the Magistrate Tan Lao, got a whole vine from Luo Yong, and happily took it home, carefully cut them into pieces and inserted them into the ground, never thinking that they would all be alive.
Chapter completed!