In the end, everyone passed Zhang Lang’s proposal to build a drainage and sewage system.

Just as Zhang Lang said, there was nothing I could do if anyone wanted to live in an environment with sewage flowing. Now that the village is built so well, it is a bit too sorry for everyone's hard work during this period.

Especially if the village doesn’t have to pay money, just put some effort into it. What the people don’t need the most is strength.

In each village, it should be said that a clan surname went back to prepare things and organized people to hold sacrificial rituals.

Such a grand sacrificial activity is naturally inseparable from the nine old men. They organize tribal sacrifices every year, and they are familiar with the ritual activities, so they take the initiative to organize the ritual.

Zhang Lang was busy at three construction sites. Some people were willing to share the work, but he was willing to do it.

A drainage and sewage system does not mean that it is done by building an underground pipeline.

The most important thing is the collection and treatment of sewage. The main production of domestic sewage in the village is domestic sewage. The domestic sewage treatment process abroad is quite mature. According to its core technology, it can be divided into two types: activated sludge method and biofilm method.

However, no matter which treatment process is used, there is no domestic treatment process. Now the country has not even solved the problem of food and clothing, so how can we have the energy to study sewage treatment?

This is why Zhang Lang has a high prestige and does not have to pay the villagers themselves, so everyone will let him do it.

If Zhang Lang dared to propose to build a sewage treatment system in the city, he would not only be criticized by people of the same level! He would probably be interviewed by his leaders.

Even if you don’t spend the country’s money, it’s not OK! No matter what channel the money you get, you must focus on more important things first.

in the country, sewage treatment did not attract the attention of the country until the 1990s!

It was not until the river water became smelly and darker! I realized the importance of sewage treatment.

Just like this mountain, it was barren and I remembered to plant trees and afforestation.

Zhang Lang came from later generations, and he would never allow the Heishui River to turn black and smelly!

After discussing with Hans, he finally chose the first, second and third-level sewage treatment process that is currently popular internationally.

The first-level treatment process is to set up a fence at the entrance of the sewage treatment facility, which mainly uses physical methods to intercept larger floating objects in order to reduce the load on subsequent treatment structures and enable them to operate normally.

The secondary treatment process mainly removes organic substances in colloidal and solubility in sewage, and usually uses biological treatment methods. The primary and secondary treatment processes are conventional treatment methods.

The third-level treatment process is used to further treat difficult-to-degrade organic matter, such as phosphorus and nitrogen that can lead to oxidation of water.

Finally, reclaimed water that can be used for irrigation.

Moreover, during this third-level treatment process, a large amount of biogas can be collected.

Biogas is a good thing, which can be used to make fire and cook, and can be used to keep warm and illuminate.

Biogas liquid is also a good thing and a good agricultural fertilizer.

Through the faith channel on the jade talisman, Zhang Lang sent the procurement information to Ye Xiaoxian and asked him to purchase sewage treatment systems and biogas tanks.

This is the latest communication method developed by Zhang Lang, which is much easier to use than later mobile phones.

And it has good confidentiality effect, so you never have to worry about eavesdropping.

…………

Several old men quickly prepared the offerings of the three animals and other offerings, and wrote the sacrificial poems.

The tablets of the land parents-in-law were invited out and placed under the big locust tree. More than 5,000 people in the village, including primary school students, participated in the ritual ceremony.

To cultivate believers, you must start with the baby.

Light incense and kowtow, then recite the sacrifice words, and then the kowtow ceremony is completed.

Zhang Lang pretended to put the drawings designed by Hans in front of his tablet, and then made a muffled thunder in the air.

He smiled and said to everyone: "Okay! The Land Master has responded! Let's go back! Let's disperse! Go and do whatever you should do!"

He is in a good mood now. He removes the incense energy consumed by the underground caves, and there is still a lot of it left. It's really profitable.

Zhang Lang brought Hans and the village committee members to the pig farm. The pig farm was built at the beginning with a stock of 5,000 heads, and the area was very large. After a little transformation, it could be used as a sewage treatment plant.

Moreover, the terrain of the pig farm is more than ten meters lower than that of the village, so it is used as a sewage treatment plant, and even water pumps are saved.

When he arrived at the pig farm, Zhang Lang asked someone to call the excavator over.

"Here! Dig in from here!" Zhang Lang said, pointing to a cliff in the wild boar factory.

"Okay! Uncle Wolf, please dodge it!"

Erlangzi agreed, climbed onto the excavator, and started digging at the position where Zhang Lang pointed.

After digging for a few times, Erlangzi stopped, turned off the fire and ran out of the car, "Uncle Wolf, dig out a cave!"

"Cave?" The villagers of the village committee and the old man who were idle and watched the fun were stunned.

How could a cave appear in this place? They explored it when the pig farm was built.

Although there are no professional exploration machinery in later generations, as a family of craftsmen, they have their own methods.

When the dust dissipated, Zhang Lang pretended to stand at the entrance of the cave and looked inside. It was dark inside.

"Go! Get a few torches!"

After a while, the rosin torch was sent over.

Zhang Lang held a torch, "Mr. Hans, let's go in and take a look? The Land Master told me that it should have a certain meaning to dig up the ground here!"

Hans didn't say anything, so he asked for a torch and took the lead in.

Zhang Lang, his third uncle and fourth uncle, also followed him into the cave.

The cave is very wide and there is no problem with running cars.

After walking about a mile, my third uncle suddenly exclaimed: "Wait! There is a fork here!"

Others also found the fork in the road, "There are also here!"

Hans, who was walking in the front, screamed, "Look! What is that?"

Everyone came forward and shone it on a torch.

The fourth uncle looked for a while before saying, "Here... this should be the root of the big locust tree!"

Zhang Lang stood by him silently, without saying a word.

Let them explore and discover the secret of this cave by themselves.

A few people explored in the cave for a long time before they came out.

As soon as Hans came out of the cave, he began to paint on the ground.

It was really hard for him. Once he went in, he recorded the forks at all times.

After drawing the map, Hans grew up and said, "The Three Pure Dao Ancestors are above! This is so amazing! There is actually a Bagua Formation underground!"

The people in the village looked at the simple map drawn by Hans, and they were so shocked that they couldn't speak.

They looked at the planning map of the new village drawn by Zhang Lang less than ten times. Now, combined with Hans's sketch, they found that the underground cave actually overlapped with Zhang Lang's planning map.

Hans stared at the sketch drawn on the ground and shouted excitedly: "Locke! Sid! Go and get the instrument! Let's measure it again!"
Chapter completed!