"Xiao Xuan, I'm here today to discuss something with you!"
In the main hall, Li Zexuan, Li Jingmo, and Han Tianhu were seated. Han Lizheng took a sip of tea and said seriously.
"Oh? Father-in-law, please tell me what you want to say! "
When Li Zexuan heard this, he immediately perked up.
Ever since Han Lizheng had returned from Yunzhou last year, Li Zexuan felt that his father-in-law had become a different person. Li Zexuan had no idea what had happened to Han Lizheng in Yunzhou. He had asked, but Han Lizheng refused to talk about it. There was nothing he could do!
Now that Han Lizheng had said that he had something to discuss with Li Zexuan, Li Zexuan's intuition told him that it might have something to do with Han Lizheng's previous trip to Yunzhou.
At this moment, Han Lizheng was silent for a moment, then he said, "Little Xuan, last year you opened up five mines in Hedong Road. This old man went to take a look at them one by one. Generally speaking, each mine brought great benefits to the surrounding citizens, because the citizens could work in the mines to support their families! But as far as I know, the mines also brought a lot of trouble to the people around it! "
"Trouble? What trouble? Did someone get into an accident in the mines? "
Li Zexuan frowned. He had a bad feeling about it, so he quickly asked.
Father Li, who was beside him, also looked nervous. Obviously, he didn't want anyone to die in his son's mines!
Han Lizheng saw that the father and son had misunderstood, so he quickly waved his hand and said, "No! No! The trouble I'm talking about is the dirty water from the mines. It often flows into the nearby rivers or lakes along the ditches. As a result, the people's daily drinking water is very troublesome!
Last year, when there was a cholera in Chang 'an City, I heard from you that it was mainly because the water source was polluted! Now, I'm worried that the people around the mines will get sick if they use the polluted water source for a long time! Little Xuan, I'm sure you don't want to see that kind of result either. That's why I'm telling you, so that you can make plans early! "
Li Zexuan's heart skipped a beat. It turned out that there was a problem with the sewage discharge from the mine. At the same time, he couldn't help but secretly praise his father-in-law for being so meticulous. He could actually foresee the negative effects of the mine on the environment. No one else had such foresight!
"Xuan 'er, your father-in-law is right! This problem had to be solved as soon as possible. Otherwise, if something happened, it would be too late! It will also ruin your reputation! "
Li Sicheng's father chimed in.
Li Zexuan nodded. After pondering for a moment, he said, "This is indeed a problem. Father-in-law, I have an idea here. Although it's a little troublesome, it can solve the water problem of the people around the mine! "
Han Lizheng's eyes lit up and he said excitedly, "Little Xuan, you have a way? That's great! Tell me about it! "
Li Zexuan frowned and ordered, "Xiao He, bring me a pen and paper!"
"Alright! Young Master! "
Xiao He's assent came from outside. After a while, the young maidservant brought in a piece of white paper and a pencil. Li Zexuan took the paper and spread it on the table. As he drew, he said,
As he drew, he said, "First of all, we have to dig a sewage treatment pond between the mine and the river. The terrain of this sewage pond must be higher than the terrain of the river. At the outlet of the sewage pond, we have to set up special dams. These dams are filled with gravel and charcoal. After the sewage from the mine enters the sewage pond, it will pass through the gravel dams and finally be discharged into the river. In this way, it will not pollute the water source in the river!"
This method was actually called the biofilm treatment method in modern times. As the sewage continuously flowed through solid fillers (gravel, plastic fillers, etc.), a mud-like biofilm would form on the fillers. A large number of microorganisms would grow in the biofilm. During the growth process, the microorganisms would release proteins that could convert the soluble heavy metal ions in the sewage into precipitates and remove them, thus purifying the sewage.
This was the most effortless and feasible method of sewage treatment that Li Zexuan could think of at present.
"Xuan 'er, will this work? What if we end up polluting the local water source? "
Old Man Li was a little skeptical when he heard that.
Li Zexuan waved his hand and said, "Father, don't worry! This method will definitely work! "
Han Lizheng stared at the manuscript that Li Zexuan had drawn and frowned. He said, "Xiao Xuan, if you want to build this sewage pond, I'm afraid it will take a lot of manpower and material resources, right? Not only that, but this sewage pond also takes up a lot of space! Is it worth it to make such a big fuss over it? "
He was the one who proposed to treat the sewage, and he was also the one who felt that it was too costly! It was not that Han Lizheng was pretentious, but he wanted to solve the sewage problem without adding too much cost to Li Zexuan!
But how could there be such a perfect thing in the world?
"Father-in-law! This matter is not a matter of whether it is worth it or not, but whether to do it or not! If we don't do anything and wait for the water source to be polluted by the sewage from the mines, then in a hundred years, or even a thousand years, our descendants won't even be able to drink a drop of clean water! So, for the sake of our children and grandchildren, we have to take the lead in this matter! "
There was no concept of environmental protection in this era, but Li Zexuan hoped that as the owner of the largest private mine in Tang Dynasty, he could set an example for the other mine owners. When the other mine owners became mine owners, they would more or less pay attention to environmental issues!
"Good! With your words, this old man is relieved! In a few days, this old man will leave for Hedong Road and urge the other mine owners to hurry up and prepare the sewage treatment pond! "
Hearing Li Zexuan's serious tone, Han Lizheng nodded solemnly and said.
"Right! Father-in-law! How many villages are there closest to this son-in-law's five mines? "
Li Zexuan suddenly asked.
Han Lizheng did not understand, but he still replied, "There are three, why?"
Li Zexuan chuckled, then said, "Three villages? That's good! This son-in-law intends to buy these three villages and give them to you. In the future, you can take care of the livelihood of these three villages, okay? "
Han Lizheng was shocked and hurriedly waved his hands. "No, no! Xiaoxuan, why are you buying villages for no reason? Even if you really want to buy them, you should buy them for yourself. Why must you give them to this old man? "
Li Zexuan explained, "Haha! Father-in-law, listen to me slowly. These villages are very close to the mines. If there is any pollution in the mines, they will be the first to suffer! If we want to control the pollution in the future, we must carry out a large-scale transformation of these three villages! Under such circumstances, the best way is to buy all of these villages first! And this son-in-law already has eight big villages under his name, so he can't expand anymore! So, I can only give these three villages to you, father-in-law! "
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