The Black Technology Era of Xueba

On Tuesday, Xiao Ming left home with a schoolbag and did not go to school. He went to Boss Xu's factory to pick up the goods.

The perfect high pressure device is made, from the finish of the stainless steel to the treatment of the joints it connects to other instruments, showing good manufacturing skills in the small factory.

It is these small factories that are responsible for the strong economic growth of Xia Guo.

Paying for the goods, Boss Xu was very good at being a man. He found a "slipper" to help Xiao Ming deliver the equipment to his home. He still thought about the million-dollar business that Xiao Ming said.

Xiao Jianqiang worked the morning shift at the paper factory, He Hui set up a stall outside the paper factory, and Xiao Ming was the only one at home.

He places the device on the ground, and then removes the bottle containing the phagocytosing type 1 anaerobic bacteria colony.

The colony bottle is divided into many layers, and it is a complete colony only when the bacteria from all layers are mixed together.

Xiao Ming took out a little strain from each layer, introduced the culture reagents and anaerobic bacteria colony strains into the high-pressure bottle successively according to the experimental instructions, and finally plugged the oxygen in the electro-extraction bottle to pressurize it.

According to Xiao Ming's drawings, the experimental high-pressure bottle has an observation port, a reagent addition port and a liquid outlet.

The reagent addition port can regularly add bacterial culture solution or add sewage, etc., and the liquid outlet can flow out the liquid after anaerobic colony treatment, which is generally pure and drinkable water.

Perfect!

After spending a whole morning, Xiao Ming finally completed every step of the experiment.

Next is the time to test the effect of Phagocytosis 1 anaerobic bacteria.

Xiao Ming took the glass reagent bottle and walked out of the door to look for sewage.

In the old family area, it is easy to find sewage. The drainage ditches on the surface, the stagnant puddles after rain, and the door of the fly restaurant are all sewage.

Under the watchful eyes of the old man, Xiao Ming endured the stench and filled the 200ml glass reagent in the gutter in the family area.

"Faeces, food residues, various heavy metals, and various harmful bacteria including Escherichia coli are enough!"

dong dong dong.

Xiao Ming walked back home again, and followed the experimental steps in the manual to add 200 ml of sewage to the inlet.

Following the instructions for phagocytosis of 1 anaerobic bacteria, 1 ml of saturated colonies can treat 100 ml to 300 ml of sewage, and the processing time is half an hour.

The saturated colony awareness here means that the concentration of phagocytosed 1 anaerobic bacteria per ml must reach 10^(-5)g/ml.

After waiting anxiously for half an hour, Xiao Ming filled 50 ml of the treated liquid in a sterilized reagent bottle. Because the phagocytic bacteria have a gravitational tendency and show a downward tendency to colonize, the liquid poured out from the upper liquid outlet will not have phagocytic bacteria.

At least, intuitively, the experiment was a success.

Because the sewage received from the ditch is yellow-black, and the liquid received now is colorless and transparent, just like bottled pure water.

However, further experiments are needed to confirm that the sewage has been treated and that the liquid meets drinking water standards.

Xiao Ming has two experimental options:

1. Drink the 50ml of water by yourself and see if you have diarrhea for a while;

2. Take it to the laboratory for testing.

The first method is relatively straightforward, but the risk is too great and there are too many uncertain factors. What if Xiao Ming's resistance is too good to kill all the bacteria in the water? Or the sewage was not treated at all, so Xiao Ming didn't drink the dung directly?

Seems a little disgusting.

veto.

The second option is to take it to a laboratory for testing, so that the most intuitive way to see what components are in the water, including those elements, whether there are heavy metals, whether the bacterial content meets the drinking water standards, and so on.

Obviously, the second option is more practical.

There are inspection and quarantine institutions in Jiangcheng, which are dedicated to serving the society. It can test the pesticide content of food and the safety indicators of drinking water.

Of course, Xiao Ming could also take the sample water to Jiangcheng No. 3 Middle School Laboratory, but with the crude equipment and dirty environment of the No. 3 Biochemistry Laboratory, Xiao Ming gave up this plan.

Still worth the money.

Before lunch, Xiao Ming took the test tube and went out. He knew that the inspection and quarantine center was near the Jiangcheng Chengbei Industrial Zone.

This time, Xiao Ming rarely did not ride a rusty bicycle but spent 15 yuan to take a taxi.

"One inspection is 800 yuan, and the sample will be sent after paying the fee." The staff in the window department had long lost their passion for their work and said mechanistically.

800 yuan for a test, Xiao Ming's flesh aches.

For the payment and other results, Xiao Ming submitted the documents at 1:30 in the afternoon, and the results would not be available until 4:00.

"Brothers also do this?" While Xiao Ming was waiting, a middle-aged man took the initiative to strike up a conversation.

Xiao Ming was at a loss when he saw the man saying: "There are many products in the market in the north of the city, so make sure you grab one! After the test results come out, I'll go to the store that sells pickled products. The sodium nitrite is definitely exceeding the standard. This time I can't make it easier for them if they don't give me 5,000 yuan."

After working for a long time, this person specializes in inspection and quarantine business, and Xiao Ming not only sighed: "It's really a champion."

"Liquid Xiao Ming!" a woman shouted from the window.

Seeing that no one answered, the woman shouted again in a sharp voice: "Liquid Xiao Ming is out!"

"Brother, are you calling me?" the middle-aged man reminded.

Xiao Ming came back to his senses, speechless, and shouting like this, he is not a sample, but liquid Xiao Ming.

"Come here." Xiao Ming walked over quickly.

The middle-aged woman said angrily, "I've been shouting for a long time!"

"I'm sorry, I'm sorry!" Xiao Ming took the inspection and quarantine order.

The test content is divided into chromaticity, turbidity, odor and taste, total bacteria (E. coli separate list), heavy metal content and so on.

This is the standard drinking water test indicator.

All indicators are qualified!

Among them, the total coliforms and heat-resistant coliforms related to the reference standard are all 0. Heavy metal content is also 0!

Perfect!

Xiao Ming squeezed his fist tightly.

"Little brother is going to collect money?" The middle-aged man laughed.

Xiao Ming just smiled and left quickly!

Among these indicators, the one that gave Xiao Ming the most information about the phagocytosis of 1 anaerobic bacteria was that the coliform colony was 0.

There are manure and food residues in the water in the drains of the community, and the number of Escherichia coli is definitely not 0.

In fact, according to the complete experimental guidelines, Xiao Ming also had to take the raw water samples (sewage) here for testing, but once every eight hundred times, Xiao Ming with an empty wallet gave up the standard experiment. Even so, the results speak for themselves! Phagocytosis 1 anaerobic bacteria are effective for sewage treatment!

But whether it is effective for the sewage treatment of paper mills, Xiao Ming has to further experiment.

Xiao Ming, who was excited to go home, did not expect that the head teacher had already contacted He Hui after he skipped school for a day. He Hui and Xiao Jianqiang were looking for people in the paper factory and various Internet cafes near the school.

According to Xiao Ming's past urination, most of the time he went to the Internet cafe to play games again.

He Hui hurriedly scolded: "This bastard, I thought he was so good in the examination because he worked hard. Today, the head teacher said that he suspects that this kid is cheating! Why is it so worrying?"