Chapter 195 Sewage Treatment
After Chishao woke up, everyone in the Teng tribe breathed a sigh of relief, and bright smiles appeared on everyone's faces again.
Because the weather was good this year, the crops grew lushly, and the various wild animals and birds raised also reproduced rapidly.
With just a few more generations of reproduction, these wild beasts and birds will sooner or later be domesticated into real poultry and livestock.
To the east bank of the Feiyu River, most of the processing workshops have moved there one after another, and even the breeding area has moved to the east bank, because Jiang Xuan wants to take precautions in advance against the possibility that domesticated livestock may spread some diseases.
However, this raises an obvious problem.
That's sewage.
Whether it is smelting bronze, making animal skins with nitrate, purifying mineral salt, making pottery, etc., a large amount of sewage will be generated.
In the past, the tribe was small, and the workshops were also small and scattered, so the sewage phenomenon was not particularly obvious.
Now, as the rattan tribe becomes larger and larger, the workshops are also getting bigger, and more and more sewage is generated.
In addition, the sewage from various workshops is discharged almost at will, resulting in a lot of land being polluted, and a foul odor can be smelled from a distance.
"We can't go on like this. If we continue to discharge pollutants in this way, sooner or later the Feiyu River will become a stinking ditch, and we will have to get drinking water from somewhere else."
Jiang Xuan walked in the primitive industrial zone on the east coast, looking at the polluted soil and smelling all kinds of pungent odors, feeling very bad.
The leader of the guard team of the second settlement, Cangli, was beside him and asked cautiously, "Chief, is it really that serious?"
The tribesmen had never seen what real industrial pollution looked like, and they didn’t care much about sewage, thinking it was no big deal.
Before this, Xanthium sibiricum also thought so. Although it smelled a bit, it didn't seem to be a big deal.
"If this level of indiscriminate discharge continues, the situation will be ten or a hundred times more serious than I said!"
Jiang Xuan knew that Cangli would not believe it, so he asked a guard to go to the river and catch some shrimps.
There were a lot of shrimps and crabs near Feiyu River, and the soldier soon came back with a few big shrimps.
"Watch it."
Jiang Xuan threw the shrimps into a drainage ditch outside a garment workshop.
The soil in this drainage ditch has turned black and the sewage is extremely smelly. The shrimps are most sensitive to water quality and as soon as they enter the water, they try their best to crawl out.
Jiang Xuan picked them up with a stick and put them back into the water, and they continued to climb out.
"See? Even shrimps can't survive in this kind of water. If you put a fish that can't crawl in it, it will die in no time."
"Just think about it. If one day the river is filled with this kind of sewage, fish, shrimps, crabs, and even water scorpions that can turn into giant dragonflies will all die or flee the area."
"The crops we plant will not grow tall or large, or even die."
"What should we do then?"
Jiang Xuan's words finally made Cangli and others take it seriously. The horrible scene was enough to make one's scalp tingle just thinking about it.
"Chief, what should we do then?" Cangli looked at Jiang Xuan, because he knew that Jiang Xuan would definitely have a solution.
"What to do? Of course, treat the sewage."
Jiang Xuan pointed to all the workshops, including the breeding area: "All places that generate sewage should be equipped with unified drainage pipes to collect the sewage and treat it before discharging it into the river."
"Chief, what is a drainpipe?"
"Drain pipes are, of course, pipes that can drain water. We can make ceramic drain pipes, bury them underground, and cover them with soil. This way, where sewage flows, there will be no stinking smell, and it will not pollute a lot of land."
After listening to Jiang Xuan's words, Cangli nodded in sudden realization. He had seen the tribe use bamboo to collect water from a distance, and he thought that this drainage pipe should be similar in shape to the hollow bamboo.
“What happens after the sewage is concentrated?”
“Filtering and purification, of course.”
Xanthium scratched his head. He didn't quite understand what "filtration" and "purification" meant, but he didn't ask much. He would know the answer when the time came.
Jiang Xuan first chose a low-lying place to build a sewage treatment plant.
Then he went to the pottery workshop and used clay to mold a round pipe-shaped pottery blank.
This kind of circular pipe has an outer eaves at one end and an inner eaves at the other end. By combining the inside and outside, the two pipes can be spliced together.
It's a bit like a ceramic chimney, but much larger and thicker than a chimney.
Today's pottery workshops are no longer the two cross-ventilated kilns of the past, but earthen kilns as high as two houses that can fire many large pottery pieces at one time.
After Jiang Xuan made the first round pipe ceramic blank, he explained the function of the pipe and the splicing method to the craftsmen.
This thing is not complicated, and since there is already a pottery blank as a sample, the craftsmen understood it as soon as they heard it.
"Don't worry, Chief. We will try our best to burn enough pipes."
Jiang Xuan nodded and said, "Please work hard, sewage treatment is very important to all of us. The tribesmen in the future will be forever grateful to you."
After hearing what Jiang Xuan said, the craftsmen suddenly felt a sense of mission and became more motivated.
After leaving the pottery workshop, Jiang Xuan found the newly established engineering team of the Teng tribe.
As the tribe grew larger, building houses, repairing roads, and digging ditches required a large number of people.
Therefore, Jiang Xuan specially set up an engineering team and trained a group of clansmen to become a professional team in construction.
In this way, whether it is building houses or repairing roads, efficiency will be greatly improved and quality will be guaranteed.
The leader of the engineering team, named Hongtu, is a middle-aged man who looks very honest and simple.
He has dark skin and is not very tall, but very strong. He is down-to-earth, hard-working and not fussy. Jiang Xuan likes such people very much.
"Hongtu, I need your engineering team to go to the east bank to build a sewage treatment plant, dig ditches, lay pipes, and lead all the sewage to the sewage treatment plant."
"Chief, how should we build this sewage treatment plant?"
"It's easy. Just build two houses and six filtration pools."
Jiang Xuan thought for a moment and said, "You may not understand what I am saying here. How about this? Come with me over there and I will tell you slowly."
"good."
Jiang Xuan brought Hongtu to Dong'an, first explained to him the harm of sewage, and then told him his ideas bit by bit.
"You see, we dig a ditch outside each workshop and lay ceramic pipes, so that all the sewage can be collected through the pipes."
Jiang Xuan used the mud to make a few small pipes and demonstrated to Hong Tu how to lay the pipes.
This thing is not complicated. After Jiang Xuan's simple demonstration, Hongtu immediately understood it.
Jiang Xuan can always come up with some new and practical things, and Hongtu admires him very much.
Afterwards, Jiang Xuan took the red soil to the location of the sewage treatment plant he had selected.
"In this place, on the left, we can build two houses, a little further away, for the tribesmen in charge of this place to live in."
"On the right, follow this slope and dig six large pools."
"The first pool is covered with large pebbles at the bottom to filter out larger garbage from sewage."
"The second pool is filled with smaller pebbles."
"The third one is paved with coarser gravel, and the fourth pool is paved with finer gravel."
“The fifth pool has a layer of charcoal at the bottom and fine sand on top.”
"For the sixth pool, add a layer of sand, a layer of charcoal, and five layers in a row. In this way, the sewage flowing through the six pools should be able to become relatively clean water and can be discharged into the river."
After Jiang Xuan finished speaking, Hong Tu nodded frequently. He tried his best to remember every word Jiang Xuan said. Although he could not fully understand why he did so, he believed in Jiang Xuan's wisdom.
"How about this, when we get back, I'll draw you a diagram, and your engineering team can just follow it. You don't have to bother remembering it."
Hong Tu breathed a sigh of relief and said, "It would be best if you have a picture."
"Okay, I'll send it to you when I finish drawing it."
Jiang Xuan took the red soil and left the east coast by boat and returned to the residential area on the west coast.
Then he returned to his room, took out a blank animal skin scroll, and began to draw seriously.
He clearly drew the location of each workshop and the location of the drainage pipes on the map.
Then he drew the area where the sewage treatment plant would be built and the locations of the six filtration pools.
In order to make it easier for Hongtu to understand, he even drew the coarseness of the sand and gravel in each filter pool. For the two pools at the back, even the layers of sand and black charcoal were clearly drawn.
In this way, it will be less likely for Hongtu and his team to make mistakes when building.
After drawing a simple and easy-to-understand blueprint, Jiang Xuan personally delivered it to Hongtu and made sure that he fully understood what was drawn on the blueprint.
The next day after receiving the drawings, Hongtu immediately led the engineering team to start work.
They built the house according to the blueprints and then dug the ditches. After completing these two tasks, the ceramic pipes were basically fired.
The people from Hongtu moved these ceramic pipes over, and then according to Jiang Xuan's instructions, they spliced and laid them one by one. After laying, they tried to let water flow through them, and finally covered them with soil.
After laying all the pipes, Hongtu led people to dig six large filtration pools, and according to Jiang Xuan's instructions, they laid different types of sand, gravel and charcoal in each filter pool.
It took the engineering team more than two months to complete these tasks.
More than two months later, the simple sewage treatment system of Teng Tribe was finally laid.
"Let it go!"
On the eighth day of September, with Jiang Xuan's order, all the sewage began to flow into the pipes and then into the filtration pool.
Every time the sewage passes through a filter pool, some impurities will be filtered out. When it passes through the sixth filter pool and is filtered through layers of sand and charcoal, the water becomes clear again.
“Great, it worked!”
When Jiang Xuan and the engineering team, as well as many members of the Teng tribe, saw the clear water flowing from the sixth filtration pool into the Feiyu River, everyone was excited.
Hongtu scooped up some treated water, smelled it, and found that the smell was no longer pungent. A bright smile appeared on his face and his heart was filled with a sense of accomplishment.
From now on, sewage from the original industrial area of Tengbu will be treated before being discharged into the river.
Moreover, Jiang Xuan will specially assign several tribesmen to be responsible for this matter. Not only will they clean and maintain the filter pool, but they will also be encouraged to try more filtering methods to make the sewage treatment system more and more effective.
…
Breeding area.
"Captain, after so many days of hiding, these raptor eggs should be hatching, right?"
Several soldiers from the breeding team stared at the unicorn's nest in the wooden house with anticipation in their eyes.
Dajiao said: "It should be about the same, but it's hard to say, we don't know much about birds of prey."
In the battle with the raptor tribe, Da Jiao obtained dozens of raptor eggs. After obtaining Jiang Xuan's consent, he brought them back to the Teng tribe, intending to hatch them and then tame them slowly.
At first, he used an old hen to hatch eggs from a colorful pheasant, but the raptor eggs were too big, and the old hen probably felt something was wrong, so she ran away after two days.
Afterwards, the big horned bird set its sights on the larger unicorns, and quietly replaced several female unicorns that had just started incubating eggs.
He first took away the female unicorn that was incubating eggs. The unicorn was very angry and pecked him a few times.
He then replaced the unicorn eggs in the nest with raptor eggs and put the female unicorn back.
The female unicorn was so eager to incubate the eggs that she didn't leave the nest even if she noticed something was wrong.
Raptor eggs are difficult to hatch, and these poor female unicorns took more than a month to incubate them.
Although the breeding team would bring food to the nest from time to time for them to eat, the unicorns were squatting so long that their minds were not clear, their appetite was poor, and they were getting thinner and thinner.
The raptor would come over from time to time to take a look. These unicorns were almost unable to hold on. If the raptor eggs could not be hatched in a few days, they would have to give up hatching the eggs in order to save these poor unicorns.
Two more days passed in the agonizing wait.
Just when Big Horn was about to give up, the shell of a bird of prey egg suddenly shook slightly, and a small pecking sound was heard.
The female unicorn obviously also noticed the situation of the egg. She gently pushed the egg forward with her beak and then stared at the movement of the egg.
"It's about to break out of its shell."
Da Jiao was overjoyed. He kept rubbing his hands excitedly around the bird's nest, using this way to relieve his nervousness and excitement.
The bird egg shook more and more violently, and the little bird of prey inside kept pecking at the eggshell, eventually pecking a hole in it.
Then, the little raptor continued to peck, making the hole bigger and bigger. Finally, with the help of the female unicorn, the little raptor finally broke out of the shell.
"The hatching was successful, it was a success!"
Dajiao looked at the little bird of prey that was trying hard to stand up. He was excited, but also finally felt relieved.
This proves that birds of different species can hatch each other as long as the size difference is not too large.
At the same time, since these birds of prey have lived in the vine tribe since they hatched, they are more reliable than domesticated young birds.
After the first little raptor came out, other birds of prey also hatched one after another. In the end, the breeding team got 28 little raptors, while the other eggs failed to hatch.
(End of this chapter)
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