Back at the hotel, the experiment continued.

The rest is left to the digestive bacteria.

The next day, the results of the experiment came out.

Whether it's a filthy bottle, minced meat, or chili peppers, all of them are broken down by digestive bacteria.

At a constant temperature of more than 40 degrees, organic compounds are broken down by digestive bacteria into stable compounds similar to small molecules such as water, carbon dioxide, and nitrate.

It is certain that the digestive bacteria solution is weakly acidic, and experiments have found that a large amount of heat is generated in the process of decomposing organic matter in the colony.

This also proves that digestive bacteria are resistant to heat and high temperatures.

The same is true for the treatment of wastewater.

And then there's the second experiment.

Whether it's water or stable inorganic salts, these are all naturally occurring in nature, and the second experiment needs to exclude the bacterial solution to see how the colonies and stable inorganic substances that have broken down my small molecules will exist in nature.

Due to time constraints, the experiment will be conducted on the last day of the outdoor experiment.

The next day, Zhou Xiao drove and took everyone to the countryside on the edge of the city in the morning and the industrial area in the afternoon.

Jiangcheng is an old industrial city, and its development is also very uneven.

The city center is the face of Jiangcheng City, so both the infrastructure construction and the appearance of the city are passable.

However, in some villages around Jiangcheng, there is still no running water and natural gas.

In such a village, although there is a garbage room, the disposal rate is not high.

In addition, the villagers' residences are scattered around the village and are not concentrated, so it is very troublesome for them to throw garbage into the garbage room, which leads to many villagers unconsciously throwing garbage into the ditch at the door, and the domestic sewage at home is also directly discharged into the ditch.

Dirty and messy is a more conspicuous business card in the countryside around Jiangcheng.

Everyone in the village knows that suddenly outsiders will be very vigilant, and there will even be something more serious than the old aunt snatching the bottle last night.

Zhou Xiao also expected this.

He found someone in the village who could speak through the local area of Jiangcheng, sent two bottles of good wine, and asked him to lead the way.

With acquaintances leading the way, things are much easier.

Leading the way today is the village butcher Xiao, who is also the leader of the production team.

Knowing that Zhou Xiao and others were going to come to inspect the sewage, Butcher Xiao was actually quite happy.

While leading the way, he said: "The environment of our village should have been rectified a long time ago, every household is directly discharged, and the garbage is also discharged into the river along the ditch, which is a mess!" I used to fish in the ditch when I was a kid, and now I don't want to go to the river. ”

Sure enough, Zhou Xiao smelled a pungent smell when she was a few hundred meters away from the river, and this smell should not only be the smell of domestic sewage.

Zhou Xiao said: "You first collect some rural domestic garbage, and then collect the sewage directly discharged by farmers in the ditch, and also collect some in the ditch next to the field to see if there are pesticide residues in the water in the ditch, and finally we will go to the Bailong River." ”

The Bailong River is the river where Butcher Xiao often touched fish when he was a child, and this river is not only the main source of irrigation water in the village, but also one of the important tributaries of the main water system of Jiangcheng.

After the Bailong River flows into the main water system of Jiangcheng, it is introduced into the water plant by the water supply company to supply water to the residents of Jiangcheng after treatment.

Looking at the disgusting situation of the Bailong River, I was thinking that most of the residents of Jiangcheng City drank tap water after such water treatment......

Zhou Xiao had a chill.

There is another important reason for taking sewage in rural areas.

There are many types and quantities of bacteria in rural sewage, such as E. coli and so on.

Zhou Xiao wanted to know if these bacteria had an effect on digestive bacteria.

This effect is not only about the survival of digestive bacteria, but also about whether or not digestive bacteria will mutate under the influence of other colonies.

Butcher Xiao didn't know Zhou Xiao's identity, thinking that Zhou Xiao and his team were sent by the city to investigate the water source and prepare to help the village deal with sewage and garbage.

Butcher Xiao asked with concern: "Little brother, what are you going to do to solve the problems in our village!" Every year there are several new cancers in our village, and several people die of cancer every year. I remember I didn't have so many cancers when I was a child, and I don't know how it was so many over the years. Let's just say that I am separated from Zhang Lao Er, who is only in his forties at a young age, has advanced liver cancer, and passed away last year. My father, who also had liver cancer, died a few years ago. ”

Butcher Xiao followed behind the lively uncle and said:

"Isn't it? Zhang Lao's second brother and his brother Zhang Laosan were also diagnosed with cancer last year, it seems to be esophageal cancer, and they are just forty. ”

"Wang's second sister-in-law is still cancer, stomach cancer ......"

As soon as you say it, there are seven or eight cancer patients.

Mo Li was surprised: "So many cancers? ”

Although cancer is now trending in clusters and at a younger age due to the environment, lifestyle habits, etc., it is still very rare to have so many cancers in one village.

This may indicate that the environment in the village must be polluted.

But can domestic sewage pollute the environment?

Zhou Xiao doesn't think so, and Mo Li and the others don't think so either.

It is absolutely impossible for domestic sewage to cause cancer, and there must be carcinogenic sources in the village.

When everyone came to the Bailong River, they found the answer.

Why is the Bailong River so stinky and has such a pungent smell, because on the other side of the village is the factory.

Jiangcheng is an old industrial city, although there are new and old industrial areas, most of the factories are also concentrated in the industrial area, but in the vast rural areas, there are still scattered factories.

These factories are generally built in rural areas in order to reduce costs, evade environmental protection, taxes, etc., and most of them are furniture factories, leather shoe factories, fiberboard factories and other high-polluting and high-energy-consuming enterprises.

These enterprises have existed in the local area for many years, and even the bosses are locals, and many people in the village are still working in them, so everyone has turned a blind eye to whether there are procedures and whether they violate the rules.

Small workshop-style factories do not have any compliant sewage treatment equipment at all, and sewage is discharged directly.

The furniture and leather goods industry uses the most chemicals and pollutes the most, and these things are discharged directly like the Bailong River.

As far as Zhou Xiao could see, several pipes from the factory were stretched out into the river, and the sewage with white or yellow bubbles was directly discharged.

The sewage flows down the river with water from the Bailong River, and may be diverted by aqueducts built by farmers in downstream villages to irrigate crops, or it may be treated directly into waterworks and sent to thousands of households.

In addition, some of the sewage has been turned into an underground water system deep along the riverbed, and many households in the village should be using groundwater.

Butcher Xiao asked hopefully, "Are you here to investigate pollution?" When will the sewage in our village be solved? ”