"That's right, I'm a student biologist. ”

Lin Han smiled: "Since you are a student biologist, can you help me get some special strains or strains, such as sewage treatment bacteria?"

The effect of manipulating microorganisms is powerful, but like Lin Han, it is actually very inefficient to rudely gather a large area of microorganisms without selection.

After all, microorganisms have a wide variety of properties and functions, and not every microorganism has the ability to efficiently break down pollutants.

If special microorganisms can be found and targeted control can be carried out, the treatment efficiency will be greatly improved.

To put it simply, a strain refers to a class of bacteria with relatively uniform characteristics, while a strain can be regarded as a pure species of a certain type of bacteria, with more obvious characteristics.

"Strains?" Song Shuqing was a little surprised, "What do you want these for?"

"The sewage treatment plant I opened uses microbial treatment technology, but due to the lack of excellent treatment bacteria, there is still a lot of room for improvement in efficiency. ”

After all, Song Shuqing is a biology major, and of course Lin Han will not say those things that fool people.

Although this ambiguous statement made Song Shuqing a little suspicious, he didn't delve into it when he thought that it might involve trade secrets: "I have been to the microbiology laboratory of Peking University a few times, and several graduate students have stayed there for many years, so it is not difficult to get some strains. ”

He then changed his words again: "However, there are some very advanced specialized strains that involve major scientific research projects and even state secrets. I can't touch something of this level. ”

"And which strains can you get?"

"You definitely can't look down on ordinary ones, and I can't do it if it's too powerful. So what you get in the end, it's somewhere in between. Song Shuqing groaned.

"For example, some experimental strains imported from abroad are generally difficult to buy on the market, but in addition to the relatively high price, they are not important things. As long as you can afford it, I can go to the lab and find someone to buy some. ”

Lin Han was stunned: "What, is it expensive?"

"Of course it's expensive, is there anything in the laboratory that doesn't burn money? Some reagents cost thousands of dollars a gram. ”

A gram is several thousand, more than ten times more expensive than gold...... To calculate it like this, Lin Han's family background is really not enough to squander.

Song Shuqing couldn't help but smile: "Of course it won't be such expensive things, I estimate that a strain costs a few thousand yuan, and there are hundreds of cheap ones." How much are you going to buy?"

Lin Han thought for a while: "In this way, you can buy a copy for me for any strain with outstanding degradation and oxidative decomposition capabilities." 200,000, you can buy a lot, right?"

......

On the same day, Song Shuqing took the 200,000 yuan given to him by Lin Han and went straight to the capital, preparing to go to the microbiology laboratory of Peking University to purchase a batch of strains for Lin Han.

"Gaia, I'll choose this Tianhu Village. After inspecting it, Lin Han made a decision.

"Okay, the object of your current rural governance task is Tianhu Village. ”

"By the way, what do you mean by including but not limited to the ecological environment?" Lin Han suddenly remembered.

"Well, let's say better building planning, if it can be implemented, is also good for the environment in the long run. Gaia thought for a moment, "But there's not much you can do about it, so don't worry too much about it." ”

"Basically, if you can solve the environmental problems that you have identified so far in three months, the task will be considered a complete one. ”

As far as Lin Han's observation is concerned, there are three main environmental problems in Tianhu Village.

First of all, the most prominent water pollution problem, the main pollutants are all kinds of organic waste, pesticides, etc., which have caused great damage to the ecological environment of the entire village.

The second is the serious accumulation of garbage, there are too few garbage cans and they are useless, and garbage can be seen everywhere on the roadside in various corners.

There is also the problem of soil pollution, which is dominated by pesticides and excessive use of chemical fertilizers, as well as large amounts of sewage from irrigation fields.

In addition, there are problems such as burning straw polluting the air, but it is relatively less prominent.

Water bodies, garbage, and soil, these are the three major environmental problems that Lin Han has observed so far.

Of course, these three problems are common in all villages, except for those in the deep mountains and extremely remote mountain villages, almost every village will inevitably have these problems.

The mass occurrence of these problems may only be a matter of the last decade or so. The price of rapid development has also come very quickly.

Lin Han was walking around again, and was about to purify the river water in the village first, but suddenly there was a burst of from his body, which made him frown.

It's still a big deal.

Lin Han went to the car to get some toilet paper, then found a farmhouse toilet to untie his clothes, and prepared to start thinking about philosophical questions.

However, the process was not pleasant, and the first problem was that he was stepping on two wooden planks that had been soaked in urine for a long time, which looked very unstable.

It's easy to fix, just spread your legs a little apart so that your feet are on the ground and you don't have to worry about breaking the plank.

Immediately afterwards, there is a breath that lasts for a long time, wafting out of the tunnel, refreshing people's hearts and spleens, and it will not disperse for a long time.

"My day, so stinky......"

The maggots at their feet writhed their nimble limbs, passing through the partially dry ground, leaving sticky trails in their wake.

These are not important, what really makes Lin Han feel collapsed is the few mosquitoes and flies lingering beside him, buzzing and flying, stopping to watch his lower body from time to time, and moving his hands and feet is not honest at all.

"Looks like we're going to have to fix it quickly. ”

After expelling mosquitoes and flies to no avail, Lin Han had no choice but to choose a quick solution.

However, at this moment, there was a sound of hurried footsteps outside the toilet, and then an uncle suddenly appeared in front of Lin Han.

"Huh?" the uncle looked stunned.

"I'm sorry, I'll borrow your toilet for ......," Lin Han smiled awkwardly.

"Oh...... It's okay, you hurry up. ”

The uncle immediately stood in front of Lin Han, waiting as if in line, with a little eagerness on his face.

Lin Han finally left the toilet in embarrassment, and let out a long sigh of relief, with palpitations: "It seems that there is a fourth big problem here." ”

......