After almost two years of cleaning, the total landfill of several dead branches and leaves in the entire reservoir area was about 200,000 tons.

Obviously, this amount of biomass is not enough for the giant sacred tree.

Therefore, the biological fertilizer formed by artificial landfill and subsequent wastewater treatment in Firefly City can only be used as feedstock for the basic growth function of the sacred tree.

The development of a tree is basically composed of four major elements: hydrogen, carbon, nitrogen and oxygen, among which hydrogen and oxygen are water.

The carbon dioxide purification function is to obtain carbon.

With the scale of the sacred tree, the average concentration of carbon dioxide emitted by such a small population and factories is not enough to see.

No matter how high the population density is caused by air flow, it is difficult for outdoor carbon dioxide concentration to exceed one thousandth of the year. There is no particularly good way. To accelerate growth, artificial carbon replenishment can only be achieved.

There are two sources of carbon replenishment, one is the volcanic ash from the entire dark place.

The main components of volcanic ash are carbon and a small amount of solid sulfide, so it can serve as a source of fertility and provide agricultural benefits to surrounding residents in the decades after the volcanic eruption.

There are a lot of volcanic ash in the dark place, but the earlier climate problems have led to relatively even distribution and difficulty in quantifying mining.

After floating islands floated for a while, relying on the stable water and gas output of the steam cloud below, the rain gradually normalized, so many volcanic ash were washed to the lowlands. Of course, more because of the unique properties of volcanic ash, the concrete has been completely solidified.

Anyway, it can be mined, and the amount is still quite large.

The second source is relatively high, so we use black water and coal slags from the two places in Heishan.

Cycloss contains a mixture of pulverized coal soil layer, coal gangue, and coal gangue is a mixture of coal and mudstone. Some of them can also be burned, but they are not easy to burn... Wang Qi read a strange knowledge in his previous life, saying that seeds wrapped in cinder will develop better.

However, it is not possible to use a train to transport the east and the mountains surrounding the reservoir. It is good to rely on a truck to replenish hundreds of tons a day, and about one-third of the carbon quality can be obtained.

The nitrogen required by plants mainly comes from metabolites of microorganisms and insects that are active in the soil layer, and they obviously cannot keep up with the need.

The location of the giant sacred tree is chosen in the middle of the reservoir. The main purpose is to directly cover the lake surface to minimize evaporation. In addition, the huge water body lacking light will be cleaner itself.

There is no need to say that there is any supply of microorganisms when there is a shortage of soil under your feet. The support points on the shore and bottom of the water can be supplied in a small amount.

So you still have to fix nitrogen by yourself.

Building a biological ammonia production factory can solve the problem, and refer to the chemical factory for specific reactions.

The ammonia production technology used by Rainbow Chemical is relatively primitive, mainly obtaining nitrogen from the air. Compared with coal that Wang Qi once heard of, natural gas mixes ammonia production is much lower in efficiency and has higher energy consumption. However, it is quite suitable to put it in a small kingdom, at least you don’t need to get other natural gas.

Only this relatively primitive method can easily be biogenerated, and the conversion ratio is low, and there is enough nitrogen pipes in the atmosphere.

Among the four basic elements, carbon is still relatively short of.

Elements with smaller amounts are more potassium-deficient.

During the fusion of the world, the sky turned red and disappeared quickly. At that time, it was suspected that it had reacted with the atmosphere and it was inferred that it was phosphide. Later, Wang Qi asked the exploration team to measure the components of the reservoir area and indeed found a large proportion of phosphides.

If it is not enough, you can try to find Wengji to import struvite...it is phosphate ore.

Wengji's royal family had poor governance capabilities and formed a special border. Before the floating island was transformed, it could basically be regarded as a sickle-shaped one. Only those who rely on the Luna River and the coast were managed. For example, the previous part of the trade was all border residents, and only those who were present when collecting taxes were collected. There was no administrative agency in normal times.

This situation of relying heavily on water has led to a high proportion of sailors in Wengji and it also occupies many islands of all sizes, including the specialty struvite.

Their characteristics are that they are far away from land and lack a foothold in the middle, so seabirds will concentrate on defecation and form ore layers.

However, the import of this thing consumes a lot of air transport capacity, and the existing air transport capacity cannot be taken into account.

There are some solutions to phosphorus, but the potassium part is difficult to deal with.

Potassium and sodium compounds are very similar, and they are very water-soluble. This characteristic also makes it possible to exist in long-term arid areas. Huge amounts of potassium are evenly distributed in seawater, and are also salt compounds with a second only to sodium chloride content.

Now the sea is covered by steam clouds, probably boiling water.

However, there are many islands floating in the sea, and many of them leave a layer of salt. Slowly refining the salt will always produce a little potassium.

I don’t know if this is enough, so I can only ignore it for the time being and see if it can develop well. If I don’t have to, I will find a way.

Next is the serious problem, the metal part.

The metallization function of the giant sacred tree was specially customized by Wang Qi to Solaris, and there are modification instructions, so that different metals can be used.

But no matter what metal it is, the size of a huge city is not enough.

There are only two iron ore with mining value in the kingdom, Nanzhen and Heishui. Among them, the iron ore in Nanzhen is relatively small, and the remaining reserves are expected to not exceed three million tons, which will be reduced by 40% if the iron element is counted as the amount.

Blackwater iron ore is quite large, with the minimum remaining exploitable amount expected to be 100 million tons. In fact, there may be many parts with relatively low mining value.

But even if all these 100 million tons of iron are dug out, it is not enough, and imports still involve air transportation issues.

Moreover, as for the sacred tree itself, the strength of using iron alone cannot be improved.

Plants are not steelmaking furnaces, and they cannot produce high-temperature crystal phase structures such as austenite, so the natural upper limit will be lower.

A lot of titanium ore has to be used.

Fortunately, the basic amount of titanium ore is good. There are a lot of ilmenite in the Golden Red Fortress. Because its plate is close to the kingdom, the activities of the demons are relatively rare. Nearby, there are titanium dioxide-shaped gold ore in the east of New Patez.

Titanium has the highest density and strength ratio in nature and has very strong performance. However, in industrial applications, titanium also has many inconveniences.

Titanium is much more troublesome than ordinary metals in smelting, and it is even more troublesome than tungsten. Once titanium parts are formed, it is difficult to reprocess. Cold rolling is not possible, hot rolling is easy to oxidize, and gas protection is also required in products that do not require surface oxidation.

The addition of the two makes the application threshold of titanium ingots too high. Unless the production capacity is so high that there is no place to go, it will be difficult to popularize it in the civilian field.

Therefore, although Phoenix Steel has long had titanium and titanium alloy products, the mining volume is not very good, and the two nearby ores are enough to be built for two or three hundred years.

There is another advantage in using titanium. Wang Qi groped fortress. He has some experience in what form the titanium element in the sacred tree can flow.

But the same problem is still the same. The capacity and demand are orders of magnitude different. Even if it is land transportation on the island, loading and unloading capabilities, vehicles, drivers, etc. must be considered.
Chapter completed!