The third day of the German anaerobic tower, also known as the UASB anaerobic tower, is a variant of IC anaerobic tower technology, and the biggest difference with the second generation of sewage treatment is that UASB has an additional sewage treatment process, that is, constructed wetland.

Wetlands refer to natural or artificially formed swamps and other shallow areas with still or flowing water bodies, and its water depth is generally not more than 2 meters.

Anyone who knows anything about environmental protection knows that there are three major ecosystems on earth: forests, oceans, and wetlands. wetlands, known as the "kidneys of the earth"; Forests are known as the 'lungs of the earth'.

As the "kidney of the earth", the wetland plays a role in the ecological environment by treating the earth's sewage.

In the 21st century, the environmental protection laws of Europe and the United States have very strict requirements for sewage treatment, and the original IC biological anaerobic treatment technology has been increasingly unable to keep up with the needs of the development of the times.

The specific process is that the treated sewage of the anaerobic tower is not discharged into nature, and the treated sewage enterprise first recycles a part of it as general industrial production water, and the remaining sewage is discharged into the constructed wetland, using the power of nature to do the final purification of the sewage.

Ambrera Integrated Environment's sewage treatment technology belongs to the second generation and a half generation of sewage treatment technology, and the use of anaerobic tower is an IC anaerobic biological tower, not a UASB anaerobic tower, but in the last process of sewage treatment, the module of constructed wetland is added.

Ambrera's 460-square-kilometre constructed wetland was first built in the name of an environmental experiment project with the Canadian government.

The project was strongly supported by the Canadian government, which also gave tax incentives to encourage Ambrera to protect the natural environment.

Because it is a scientific research experiment, the Canadian government gave this land for free, this is a closed wetland for workers, it is artificially cut off from the outside of the river, only a few places have built a canal connected to the outside world. Every once in a while, Ambrera Integrated Environment's water quality monitors the water quality in the wetlands, and only when the water quality fully meets Canadian legal standards can the floodgates be opened and released to the outside.

The construction of the constructed wetland began in 71. It consists of three parts: the wetland, the peatland, or the water zone, of which the peatland accounts for 40% of the constructed wetland, because peat has the effect of sewage purification.

Above the peatland is a wet meadow, which is made up of wild grasses, reeds, Icelandic knotweed, eucalyx, lingonberries, lichens, peat moss, red stem moss, moss, watermill, mushroom, algae, eyelid, rush grass, wild rice, mangrove and other dozens of wetland aquatic plants, and the peatland filters the sewage. Heavy metal ions in the sewage are left in the peatlands.

The well-developed root system of various aquatic plants planted on the peatland will absorb the heavy metal ions in the peat, thus completing the purification of sewage.

A large number of lotus flowers are planted in the water area of the wetland, and the lotus also has the ability to purify sewage.

In addition to these four types of fish, there are also a large number of loaches, crucian carp, carp and some cold-water fish, such as high whitefish, white striped fish, and Qinghai Lake naked carp.

These fish were introduced from Southeast Asia along with the Canadian government, and here we have to mention the flood of Asian carp in North America in the future.

In the 70s of the 20th century, American biologists wanted to use an ecological purification method to remove excessive algae from rivers.

The Asian carp is a voracious eater, so they introduced four species of Asian carp from China. And these carp have indeed lived up to expectations and completed the mission of cleaning up the river more completely. In the '80s, the carp entered the Mississippi River basin due to flooding, and over the next 30 years, their numbers increased dramatically, feeding along the river, destroying every ecosystem in their path.

This is the whole process of the Asian carp flooding in North America, and Canada's policy is to closely follow the United States, and the United States wants to introduce Asian carp. As a neighbor and younger brother of the United States, Canada could not lag behind, so in 74 it also began to introduce "Asian carp" from Asia.

If Ambrera had to import carp from Asia alone, Ling Shizhe would have been annoyed by various approval procedures alone. As a Chinese, Ling Shizhe is very familiar with China's freshwater fish, he did not follow the Canadian government to choose those ordinary hybrid varieties of "Asian carp", he knows which fish are delicious, which fish are not delicious, which fish are delicious and have fewer spines. Which fish can survive at high latitudes.

Taking carp as an example, there are many varieties of carp, if the meat is beautiful, the spines are few, and the ability to survive in high latitudes is the primary selection criterion, the Yellow River carp is the first choice, like other hybrid carp, Ling Shizhe does not consider it at all.

After all the fish were selected, Ling Shizhe was shipped to Canada with the hybrid "Asian carp" purchased by the Canadian government, and all the procedures were exempted, which saved Ling Shizhe a lot of trouble.

The survival rate of these Chinese freshwater fish to Canada in the first year is less than 10%, but after the first year, these surviving fish are fully adapted to Canada's environmental climate, and by the third year, the amazing reproductive ability of Chinese carp, grass carp, bighead carp, herring, crucian carp, and loach began to appear, because the first generation has fully adapted to the high latitude environment of Canada, so these fish will also pass on their genes to the next generation, so in less than five years, in addition to several cold-water fish such as high whitefish, The entire 460 square kilometers of constructed wetland are almost entirely freshwater fish carefully selected by Ling Shizhe from China.

The wetlands are filled with water and fish, which soon attract flocks of migratory birds that come to Canada for the summer.

The tall reeds here were a natural sanctuary for these migratory birds, with grass seeds and fish in the water as their food, so it soon became a habitat for birds.

A complex wetland ecological chain began to form in the constructed wetland, which also attracted a large number of tourists to visit.

The constructed wetland system has been running very well over the years, the wetland not only brings a lot of tourism income to Raccoon Town and Ambrera every year, but also attracts the attention of many enterprises, the environmental protection laws in Europe and the United States are becoming more and more stringent over the years, and the ecological pressure on enterprises, especially chemical enterprises, is getting bigger and bigger, and the cost is getting higher and higher.

The success of Ambrera's constructed wetland has given many companies and governments in Europe and the United States hope for solving the contradiction between the environment and employment. They have excluded observers from staying in Raccoon Town for a long time to observe the effects of Ambrera's wastewater treatment system, and if it proves to be effective, they will sign a contract with Ambrera. Introduce this set of IC anaerobic tower + wetland sewage treatment technology.

This is a huge gold mine, a huge market, and if nothing else, the various biodegradable substances sold every year alone can make Ambrera Integrated Environmental Company become a Fortune 500 company overnight. And it's also one of the top few big companies.

Just when everyone was full of confidence, there was an incident where the heavy metal content in the wetland exceeded the normal value, which made Ambrella's senior management feel bad at all.

What are the consequences once the news spreads, I can figure it out with my toes, the contract must have flown off, and the annual billions of dollars in income must be gone, everyone has worked hard for this goal for so many years, needless to say that the money is spent, and everyone will not be reconciled by this hard work and sweat alone.

"Blockade, be sure to block the news!" Ling Shizhe immediately issued a gag order. "But this can only be blocked for a while, people will still know after a long time, so take advantage of this time to be clear, what is the cause of excessive heavy metals, is there a problem with our anaerobic tower, or our sewage treatment system in the early stage, or our artificial wetland has a problem, the problem must be thoroughly investigated, and then solve it, do you know?"

With Ling Shizhe's order, Ambrera was running at high speed. A large number of technical experts were sent to the wetland and sewage treatment plant to find out the cause of the excessive heavy metals in the wetland, but a month later, the news came back that the anaerobic tower and sewage treatment plant were all normal, and the treated sewage was all up to standard.

"Since there is no problem with the sewage plant. So the problem must be in the wetlands, but what is the problem? It's been two months, and the cause of the problem still hasn't been found, Alison, what do you think we should do next? Ling Shizhe asked anxiously in the office.

Alison was also irritable and checked for more than two months. The problem has never been found, and if the matter is not solved, the matter is really big.

At present, Mobil Oil Company and DuPont Chemical have sent people to make preliminary contact with Ambrera, and if they know that Ambrera's sewage treatment technology is not working at this time, then so many years of hard work will really be in vain.

The contact with Mobil and DuPont was handled by Alison herself, but as the CEO of Ambrera, Alison knew he had to calm down now.

After a long time, Allison asked, "Boss, when did you find out that something was wrong with the wetland?" ”

"Two months ago, I was in ......" Ling Shizhe put on the hot spring meadow to meet a bear and meet Daniel. "He was the one who told me that there was something wrong with the constructed wetland. ”

"Understood," Alison thought for a moment and said, "Do you have his way of associating?" ”

"What's wrong?"

Alison explained, "Go find him, this old guy must have a solution, and now the only way we can solve it is to find him." ”

Ling Shizhe nodded, and found Professor Forrest's business card, which had his contact number on it, before the call came, Ling Shizhe just lifted the microphone and put it down, "Alison, once this call is made, we will be ready for heavy bleeding." ”

Alison bit her lip and said, "The blood is definitely going to come out, but if it's him, his appetite is big, and it's not a big deal, but if there is someone behind him, it's very troublesome, but no matter what, contact him first to say, the current Ambrera is no longer the small company it used to be, and no one can blackmail us!" ”

Right! Alison is right, now Ambrera is not for anyone to come and take a bite of the company, and anyone who wants to blackmail Ambrera will have to pay the price!

Thinking of this, Ling Shizhe firmed up his message and picked up the phone on the table...... (To be continued.) )