"Xiao Xuan, the old man is here today, and there is one more thing to discuss with you!"

In the main hall, Li Zexuan, Li Jingmo, and Han Tianhu sat in turn, and Han Li was taking a sip of tea.

"Oh? Father-in-law, if you have something to do, just say it! ”

When Li Zexuan heard this, he suddenly came to his senses.

In other words, since Han Lizheng returned from Yunzhou last year, Li Zexuan felt as if his father-in-law had changed as if he had changed a person, what happened to Han Li in Yunzhou, Li Zexuan had no way of knowing, he asked, but Han Li was avoiding it, and he couldn't help it!

Now Han Lizheng said that he had something to discuss with Li Zexuan, and his intuition told Li Zexuan that this might have something to do with Han Lizheng's previous trip to Yunzhou.

At this time, Han Lizheng was silent for a moment, and then said: "Xiao Xuan, last year you opened five mines in Hedong Road, and the old man went to see them one by one, in general, each mine has brought great benefits to the surrounding people, because the people can work in the mines and subsidize their families!" But as far as the old man knows, the mine has also brought a lot of trouble to the surrounding people! ”

"Trouble? What's the trouble? Could it be that someone had an accident in the mine? ”

Li Zexuan frowned, and subconsciously had some bad premonitions in his heart, so he hurriedly asked.

Father Li on the side, his face also showed a hint of nervousness, obviously he didn't want his son's mine to cause death!

Han Lizheng saw that the father and son had misunderstood, and hurriedly waved his hand and said, "No! No! The trouble that the old man said is that the dirty water produced by the mine often flows down the ditch and into the nearby rivers or lakes, so that the people will have great trouble drinking water every day!

Cholera broke out in Chang'an City last year, and the old man heard Xiaoxuan say that it was mainly because the water source was polluted! Now, the old man is worried that the people around the mine are likely to get sick if they use this polluted water source for a long time! You don't want to see that kind of result when you come to Xiaoxuan, so the old man said it and let you make plans early! ”

Li Zexuan's heart moved, it turned out that there was a problem with the discharge of sewage from the mine, and at the same time, he couldn't help but secretly praise his father-in-law for being so careful that he could see the negative effects of the mine on the environment in a forward-looking manner, and there was no one else in this vision!

"Xuan'er, your father-in-law is right! This problem must be solved as soon as possible, otherwise it will be too late when something happens in the end! And it will ruin your reputation! ”

Father Li said loudly.

Li Zexuan nodded, and after a moment of silence, he said, "This is indeed a problem. Father-in-law, son-in-law has a way here, although it is a little troublesome, but it can solve the water problem of the people around the mine! ”

Han Lizheng's eyes lit up, and he said excitedly: "Xiao Xuan, do you have a way?" That's great! Tell me about it! ”

Li Zexuan frowned and ordered: "Xiaohe, quickly bring a pen and paper!" ”

"Okay! Master! ”

There was a sound of Xiaohe's promise outside, and after a while, the little maid brought a piece of white paper and a pencil, Li Zexuan took it, spread the paper on the table, and said while drawing:

"First of all, between the major mines and rivers and lakes, we must dig a sewage treatment pool, the topography of this sewage pool must be higher than the terrain of the river, and the outlet of the sewage pool must be set up one after another special embankment, which is filled with gravel and charcoal, and the sewage from the mine enters the sewage pool, and then passes through one after another gravel embankment, and then discharges into the river, so that it will no longer pollute the water source in the river!"

This method is actually called the biofilm method in modern times, because the sewage continuously flows through the solid filler (crushed stone, plastic filler, etc.), a sludge-like biofilm will be formed on the filler, and a large number of microorganisms reproduce in the biofilm, and the microorganisms will release proteins during the growth process, which can convert the soluble heavy metal ions in the sewage into precipitate and remove, so as to play the role of purifying the sewage.

This is the most effortless and feasible sewage treatment method that Li Zexuan can think of at present.

"Xuan'er, can this work? What if the local water source is still polluted? ”

After hearing this, Father Li was skeptical.

Li Zexuan waved his hand and said, "Dad, you can rest assured!" It definitely works! ”

Han Li was staring at the manuscript that Li Zexuan had drawn earlier, frowned for a while, and said, "Xiao Xuan, if you want to build this cesspool, I'm afraid it will cost a lot of manpower and material resources, right?" Not only that, but this cesspool also takes up space! Is it worth it to make such a big fuss about this? ”

He is the one who proposes to treat the sewage, and he is the one who thinks it is too hard for the people and money! It's not that Han Li is hypocritical, but he wants to solve the sewage problem without adding too much cost burden to Li Zexuan!

But how can there be such a perfect thing in the world?

"Father-in-law! It's not a question of whether it's worth it, it's a question of whether it's worth it! If we do nothing and wait for the water source to be polluted by mine sewage, will our descendants not be able to drink even a drop of clean water in a hundred or even a thousand years? So, for the sake of our children and grandchildren, we must take the lead in doing this! ”

There is no concept of environmental protection in this era, but Li Zexuan hopes that he, the largest private mine owner in Datang, can set an example for those mine owners in the future, and when others become mine owners, they will more or less notice environmental problems!

"Good! With your words, the old man is relieved! A few days later, the old man set off to Hedong Road, urging the mine owners to step up the preparation of this sewage treatment tank! ”

Listening to what Li Zexuan said, Han Lizheng nodded solemnly and said.

"That's right! Father-in-law! How many Zhuangzi are the closest to the five mines of Xiaozi? ”

Li Zexuan suddenly smelled.

Han Lizheng didn't know why, but still replied, "There are three, what's wrong?" ”

Li Zexuan smiled, and then said, "Three Zhuangzi? All right! The son-in-law plans to pay for the three Zhuangzi to buy them back, and then give them to your father-in-law, and in the future, your old man will go to take care of the livelihood of these three Zhuangzi? ”

Han Li was taken aback, and hurriedly waved his hand and said, "No, no, no!" Xiao Xuan, what is this good way to buy Zhuangzi? Even if you really want to buy it, you will buy it, why do you have to send it to the old man? ”

Li Zexuan explained: "Hehe! Father-in-law, listen to me slowly. These Zhuangzi families are very close to the mine, and they are the first to suffer from any pollution in the mine! If we want to control pollution in the future, we must carry out large-scale transformation of these three Zhuangzi! In this case, the best way is to buy all these Zhuangzi first! And under the name of the son-in-law, there are now eight big Zhuangzi, and they can't expand more! So I can only give these three Zhuangzi to your father-in-law! ”

……………………………

The second update!

(End of chapter)