Chapter 382 Mainstream Sewage Treatment Process A2/O
"You mean to call the dean? Ask the hospital to send more manpower?" Professor Dai asked.
"No need for now, I'm just a little excited!
Some people can’t believe it, this is the student I brought out!
A small move back then actually changed the situation today."
"Haha, Teacher Lu, Yu Qingyang is also my student!
As teachers, sometimes an inadvertent move or a word can affect the students. This is how we act as role models." Professor Dai is much more stable than Teacher Lu.
Yu Qingyang specifically mentioned this matter at the wine table before, and it was only when Yu Qingyang mentioned it that Teacher Lu remembered such a thing.
The thing is very simple, just like most college students who have just entered college nowadays.
Suddenly escaping from the busy homework in high school, you will feel a sense of confusion.
Many college students were originally good students who loved to study in high school, but everything changed once they entered college.
Play games online, make friends, smoke, drink and fall in love.
Yu Qingyang was like this at the beginning, but there were no Internet cafes at that time, and most of them were game arcades.
Of course, Yu Qingyang was not obsessed with game arcades, but with online novels that had just become popular.
Compared with traditional martial arts novels, online novels have magical settings, amazing imagination, and ups and downs of the plot. Yu Qingyang is deeply involved in it.
Even in class, online novels are indispensable.
At that time, reading online novels was not done online, but rather went to a bookstore to rent physical books.
There are many bookstores near universities that rent online novels, which are almost as few as the Internet cafes near universities now.
One thing Yu Qingyang must do every day is to carry his schoolbag and go to the bookstore to return rented books.
Each time, I rent one school bag at a time.
Many people born in the 1980s and 1990s are surprised, right?
Renting online novels actually includes book rentals!
In fact, it is not an exaggeration at all. At that time, a book was about 100,000 to 200,000 words long.
It takes about one or two hours to finish reading. Yu Qingyang can read seven or eight books a day.
One time I was in Teacher Lu's class, and Yu Qingyang sat in the back and read novels as usual.
Maybe I was so involved that I forgot that I was in class. When I saw a certain plot about torturing the protagonist, I couldn't help but slap the table and howl loudly.
Naturally, the whole class was shocked!
According to normal logic, if Yu Qingyang was reading novels and making loud noises in class, he would basically be kicked out of class and then blacklisted, waiting for a make-up exam.
However, Teacher Lu did not drive Yu Qingyang out of class at that time, but found Yu Qingyang after class.
I chatted with him for a long time, talking about life, ideals, and when he was in college. He also delayed his studies in order to write poems, and even gave Yu Qingyang a book of poems he had published.
It was that conversation that changed Yu Qingyang's fate. Yu Qingyang was no longer obsessed with online novels. Although he still read them, he only used them as a pastime after completing his studies.
Later, even if Yu Qingyang no longer took Teacher Lu's class, he would still visit him during the holidays. It was that time that his fate with Teacher Lu started.
Teacher Lu and Professor Dai chatted for a while, and Yu Qingyang came over to invite them to dinner.
"Professor Dai, Teacher Lu, German experts will come over tomorrow and ask two teachers to help check it! They will fool us with outdated technology that foreigners have to use!" At the wine table, Yu Qingyang talked about sewage treatment technology for the first time.
"Haha! Yu Qingyang, leave this matter to us! Although we can't help you design an advanced sewage treatment process, we can still distinguish the quality of the technology!" Professor Dai and Teacher Lu said to each other.
He looked at it and said with a smile.
"Yu Qingyang, I'm afraid you don't know yet, right? 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 was participating in the design, I was just following along to learn!" Professor Dai showed a proud smile on his face.
Now that he is preparing to enter the water treatment industry, Yu Qingyang naturally wants to understand the current situation of this industry. He knows that the Gaobeidian Sewage Treatment Plant in Chaoyang District, Yanjing is currently the largest sewage treatment plant in the country.
The daily processing capacity reaches one million tons.
Yu Qingyang also knows that the total designed treatment capacity of the Yangcheng Liede Sewage Treatment Plant is 1.2 million tons. However, the first phase of construction has just been completed, and the daily treatment capacity in operation is only 200,000 tons, which is still not as good as that of Yancheng.
"Professor Dai, you are so humble! With your status in the field of water environmental science, you must be the one to guide the work!" Yu Qingyang gave him a hand.
Professor Dai was very satisfied with Yu Qingyang's flattery. Although he was modest about himself, he could not hide the smile on his face.
The topic started here.
“The earliest sewage treatment plant in our country is the North District Sewage Treatment Plant in Shanghai, which was built in 1923! It treats 2,500 tons of sewage every day.
This processing capacity may not be impressive now, but before the founding of the People's Republic of China, this daily processing capacity would definitely rank among the world's advanced ones."
"Actually, Magic City is now the city with the most sewage treatment plants in the country! There are twelve sewage treatment plants in the city, which can meet the secondary discharge standards." Teacher Lu added next to him.
"Yes! A2/O process technology is considered advanced technology in the world!
It is also the current mainstream sewage treatment technology!
Most domestic sewage treatment plants use this technology.
For example, Yangcheng Datansha Sewage Treatment Plant, Liede Sewage Treatment Plant, and Jinmen’s Xiqing District Jizhuangzi Sewage Treatment Plant all use the A2/O process!”
"Professor Dai, from what you said, the A2/O process should be a very advanced process technology. Is this technology used in our country?"
"Not entirely. For example, the Gaobeidian sewage treatment plant in Chaoyang District of Yanjing uses the activated sludge method!" After Professor Dai finished speaking, Yu Qingyang began to explain to him what the activated sludge method is before he could speak.
"The activated sludge method was invented by Clark and Gage in the UK in 1912. It is an aerobic biological treatment method for sewage. It can remove dissolved and colloidal biodegradable substances from sewage.
Organic matter, suspended solids and other substances that can be adsorbed by activated sludge can also remove part of phosphorus and nitrogen."
Yu Qingyang didn't really understand the principles of the activated sludge process that Professor Dai said. He was only concerned about one issue.
"Professor Dai, how many levels of discharge standards can we use to treat sewage using the activated sludge method?"
"Uh! It can meet the second-level emission standards!" Professor Dai paused before replying angrily.
It's like a painter discussing a painting. How beautiful the painting is, how exquisite the painting skills are, what painting techniques are used, how cleverly the characters and the natural landscape are integrated. As a result, someone next to him interrupts and asks, "Excuse me, what is this?"