"Xiao Xuan, I am here today and there is one more thing I want to discuss with you!"
In the main hall, Li Zexuan, Li Jingmo, and Han Tianhu were sitting one after another. Han Li was taking a sip of tea and said seriously.
"Oh? Father-in-law, if you have anything to say, just tell me!"
When Li Zexuan heard this, he immediately became energetic.
By the way, since Han Lizheng returned from Yunzhou last year, Li Zexuan felt that his father-in-law had changed. Li Zexuan had no way of knowing what happened to Han Lizheng in Yunzhou. He asked, but Han Lizheng avoided him. There is nothing he can do about it!
Now Han Lizheng said that he had something to discuss with Li Zexuan, and his intuition told Li Zexuan that this might be related to Han Lizheng's previous trip to Yunzhou.
At this time, Han Lizheng was silent for a moment and said: "Xiaoxuan, you opened five mines on Hedong Road last year. I have visited them one by one. In general, each mine has brought great benefits to the surrounding people. There are great benefits, because the people can work in the mines and subsidize their families! But as far as I know, the mines have also brought a lot of trouble to the people around them!"
"Trouble? What trouble? Did someone have an accident in the mine?"
Li Zexuan frowned and subconsciously had some bad premonitions in his heart, so he asked quickly.
Father Li on the side also showed a trace of nervousness on his face. Obviously he didn't want anyone to die in his son's mine!
Seeing that the father and son had misunderstood, Han Lizheng waved his hands and said: "No! No! The trouble I'm talking about is that the dirty water produced by the mine often flows along the ditch into nearby rivers or lakes. As a result, the common people's daily Drinking water can cause big trouble!
Cholera broke out in Chang'an last year. I heard you say, Xiaoxuan, that it was mainly because the water source was polluted! Now, I am worried that the people around the mine may get sick if they use this polluted water source for a long time! I think Xiaoxuan, you don't want to see that kind of result, so I will tell you and let you make plans in advance! "
Li Zexuan's heart moved. 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 his thoughtfulness. He could see the negative effects of the mine on the environment in a forward-looking manner. No one else had such foresight!
"Xuan'er, your father-in-law is right! This problem must be solved as soon as possible, otherwise when something goes wrong in the end, it will be too late! And it will also ruin your reputation!"
Father Li spoke up to help.
Li Zexuan nodded, and after pondering for a moment, he said: "This is indeed a problem. Father-in-law, son-in-law, here is a method. Although it is a bit more troublesome, it can solve the water problem of the people around the mine!"
Han Lizheng's eyes lit up and he said excitedly: "Xiaoxuan, do you have a solution? That's great! Come and tell me!"
Li Zexuan raised his eyebrows and ordered: "Xiao He, quickly bring a pen and paper!"
"Okay! Master!"
Xiao He's promise came from outside. After a while, the little maid brought a piece of white paper and a pencil. Li Zexuan took them, spread the paper on the table, and said while drawing:
"First of all, a sewage treatment tank must be dug between major mines and rivers and lakes. The terrain of this sewage tank must be higher than the terrain of the river. Special dams must be set up one after another at the outlet of the sewage tank. This dike is filled with gravel and charcoal. After the sewage from the mine enters the sewage pool, it passes through one gravel dike after another before being discharged into the river, so it will no longer pollute the water source in the river!"
This method is actually called the biofilm method in modern times. Since sewage continuously flows through solid fillers (gravel, plastic fillers, etc.), a sludge-like biofilm will be generated on the filler. A large number of microorganisms breed in the biofilm. Microorganisms During the growth process, proteins will be released, which can convert soluble heavy metal ions in the sewage into precipitates and remove them, thereby purifying the sewage.
This is the least laborious and most feasible sewage treatment method that Li Zexuan can think of at present.
"Xuan'er, is this okay? What if the local water source is still polluted?"
After hearing this, Father Li was a little doubtful.
Li Zexuan waved his hand and said, "Don't worry, Dad! This method will definitely work!"
Han Li was staring at the manuscript Li Zexuan had drawn before, frowning and saying, "Xiao Xuan, if you want to build this cesspool, it will cost a lot of manpower and material resources, right? Not only that, this cesspool also takes up a lot of space!" Is it worth going to such great lengths to do this?”
He was the one who proposed treating sewage, and he was also the one who felt it was too much of a waste of money and people! It's not that Han Li is being hypocritical, but that he wants to solve the sewage problem without adding too much cost burden to Li Zexuan!
But how can anything be so perfect in the world?
"Father-in-law! This matter is not a question of whether it is worth it, but a question of whether to do it or not! If we do nothing and wait for the water source to be polluted by mine sewage, then a hundred or even a thousand years from now, we will Will our descendants not even be able to drink a drop of clean water? Therefore, 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 the Tang Dynasty, can set an example for the subsequent mine owners. When others become mine owners, they will be more or less the same. Environmental issues will be noticed!
"Okay! With your words, I feel relieved! In a few days, I will leave for Hedong Road to urge the mine owners to prepare the sewage treatment tank!"
Hearing Li Zexuan's serious words, Han Lizheng nodded solemnly and said.
"By the way! Father-in-law! Which of the five mines is closest to my son-in-law?"
Li Zexuan suddenly smelled it.
Han Lizheng didn't know why, but he still replied: "There are three, what's the matter?"
Li Zexuan smiled, and then said: "Three Zhuangzi? That's good! My son-in-law plans to pay for these three Zhuangzi, and then give them to your father-in-law. In the future, you will take care of the livelihood of these three Zhuangzi. How about you?" "
Han Lizheng was startled and waved his hands quickly: "No, no! Xiaoxuan, why are you buying Zhuangzi so neatly? Even if you really want to buy it, I will buy it for you. Why do you have to give it to me?"
Li Zexuan explained: "Haha! Father-in-law, please listen to me slowly. These Zhuangzi's homes are very close to the mine. If there is any pollution from the mine, they will be the first to suffer! If we want to control the pollution later, we must deal with these three Zhuangzi is carrying out large-scale transformation! In this case, the best way is to buy back all these Zhuangzi first! And the son-in-law now has eight big Zhuangzi under his name, and cannot expand any more! So just I can give these three Zhuangzi to your father-in-law!"
………………………
Second update!
(End of chapter)
