"You mean to call the dean and ask the hospital to send more people over?" asked Professor Dai.

"Not yet, I'm just a little excited!

I can't believe it, but this is the student I brought out!

A small move back then turned out to be the situation it is today. ”

"Hehe, Teacher Lu, Yu Qingyang is also my student!

As teachers, sometimes an inadvertent action or a sentence will affect the students, which is to be a teacher. "Professor Dai is much more stable than Teacher Lu.

Yu Qingyang also deliberately mentioned this matter at the wine table before, and it was Yu Qingyang who mentioned it, and Mr. Lu remembered that there was such a thing.

It's very simple, just like most college students nowadays who have just entered college.

Suddenly escaping from the busy school hours of high school, there will be a kind of dazedness.

Many college students were originally a good baby who loved to learn in high school, but as soon as they went to college, everything changed.

Play games online, make friends, smoke, drink, and fall in love.

Yu Qingyang was the same at the beginning, but at that time there were no Internet cafes, and some were game halls.

Of course, Yu Qingyang is not obsessed with game halls, but the Internet that has just begun to become popular.

Compared with traditional martial arts, the magical setting of the Internet, the amazing brain hole, and the ups and downs of the plot, Yu Qingyang is deeply involved.

Even classes are inseparable from the Internet.

At that time, I didn't read the Internet online, but went to the bookstore to rent physical books.

There are many bookstores near universities that rent out the Internet, and there are almost as few Internet cafes near universities as there are today.

One of the things Yu Qingyang must do every day is to carry his schoolbag to the bookstore to return the books rented.

Every time it is rented in a school bag.

Many post-80s and post-90s generations are very surprised, right?

Rent the Internet actually round the book charter!

In fact, it is not an exaggeration at all, at that time, a book was about 100,000 words or 200,000 words.

It takes about an hour or two to read, and Yu Qingyang can read seven or eight books a day.

Once in Mr. Lu's class, Yu Qingyang used to sit in the back.

Maybe I was too involved and forgot that it was class, and when I saw a certain plot of abuse, I couldn't help but slap the table and howl.

Naturally, the whole class was shocked!

According to normal logic, Yu Qingyang was in class, making a loud noise, basically being kicked out of the class, and then being blacklisted, waiting for the make-up exam.

However, Teacher Lu did not kick Yu Qingyang out of the classroom at that time, but specifically found Yu Qingyang after class.

chatted with him for a while, talking about life, ideals, and when he was in college, he also delayed his studies in order to write poems, and gave Yu Qingyang a book of poems published by himself.

It was that conversation that changed Yu Qingyang's fate, Yu Qingyang is no longer obsessed with the Internet, although he still watches it, but after completing his studies, it is regarded as a pastime.

Later, even if Yu Qingyang no longer attended Mr. Lu's class, he would visit him during the New Year's holidays, and his fate with Mr. Lu was taken over that time.

Teacher Lu chatted with Professor Dai for a while, and Yu Qingyang came over to invite them to dinner.

"Professor Dai, Teacher Lu, tomorrow the German experts will come over, and ask the two teachers to help check the gates! Let foreigners fool us with outdated technology!" At the wine table, Yu Qingyang talked about sewage treatment technology for the first time.

"Yu Qingyang, leave this matter to us! Although we can't help you design a set of advanced sewage treatment processes, we can still distinguish the quality of the technology!" Professor Dai and Teacher Lu looked at each other and said with a smile.

Professor Dai has participated in the design and construction of the Gaobeidian Sewage Treatment Plant in Chaoyang District, Yanjing and the Liede Sewage Treatment Plant in Yangcheng. Teacher Lu said with a smile.

"I'm involved in the design, just learning along!" said Professor Dai with a proud smile on his face.

Since he is ready to enter the water treatment industry, Yu Qingyang naturally wants to understand the current situation of this industry, and he knows that the Gaobeidian Sewage Treatment Plant in Chaoyang District, Yanjing is currently the largest sewage treatment plant in China.

The daily processing capacity reaches one million tons.

Yu Qingyang also knows that the total designed treatment capacity is 1.2 million tons, but now the first phase of construction has just been completed, and the daily treatment capacity put into operation is only 200,000 tons, which is not as good as the Gaobeidian Sewage Treatment Plant in Chaoyang District, Yanjing.

"Professor Dai, you are humble! With your status in the field of water environment science, you must be the guide to the work!" Yu Qingyang held it in his hand.

Professor Dai was very satisfied with Yu Qingyang's flattery, although he was humble, but the smile on his face could not be hidden.

And that's where the conversation begins.

"To say that the earliest sewage treatment plant in our country is the North District Sewage Treatment Plant in the magic capital, which was built in 1923 and treats 2,500 tons of sewage per day.

This processing capacity may be inconspicuous at present, but before the founding of the People's Republic of China, this daily processing capacity can definitely rank among the world's advanced. ”

"In fact, Modu is now the city with the most sewage treatment plants in the country! There are 12 sewage treatment plants in the city, which can meet the secondary discharge standard. Teacher Lu added next to him.

"Yes, A2/O process technology is also considered advanced technology in the world!

It is also the mainstream sewage treatment technology now!

Most of the country's wastewater treatment plants use this technology.

For example, Yangcheng Datansha Sewage Treatment Plant, Liede Sewage Treatment Plant, and Jizhuangzi Sewage Treatment Plant in Xiqing District of Jinmen all use A2/O processes!"

"Professor Dai, listen to what you said, the A2/O process should be a very advanced process technology, is this technology used in our country?"

"It's not all, for example, the Gaobeidian Sewage Treatment Plant in Chaoyang District, Yanjing uses the activated sludge method!" Professor Dai finished speaking, and without waiting for Yu Qingyang to speak, he began to popularize what is called activated sludge method.

"The activated sludge method was invented by Clark and Gage in England in 1912. It is an aerobic biological treatment method for sewage, which can remove dissolved and colloidal biodegradable organic matter and suspended solids and other substances that can be adsorbed by activated sludge from sewage, and can also remove a part of phosphorus and nitrogen. ”

Yu Qingyang didn't understand the principle of the activated sludge method mentioned by Professor Dai, and he only cared about one problem.

"Professor Dai, how many levels of discharge standards can be achieved by using activated sludge to treat sewage?"

"Uh! it can meet the Level 2 emission standard!" Professor Dai paused before replying stupidly.

It's like a painter discussing a painting, if the painting is exquisite, how exquisite the painting skills are, how skillfully the painting techniques are used, how skillfully the people and the natural landscape are integrated, and someone next to him interjects and asks, "How much is this painting worth?"