After that, Feng Jing quickly stuffed the truckload of sugarcane that Su Wu brought back into the big wooden box.

…… No, he still left three sugarcanes for Su Wu to chew and eat.

The sugarcane juice obtained has to be filtered, and at this step, because Su Wu has to provide jobs for the villagers, there is no mechanized equipment.

Therefore, the residue has to be filtered in a primitive way.

A particularly large bamboo basket is placed on a large vat, and a white cloth is spread on top of the basket, and the sugarcane water in the bucket is poured into it buckets by bucket.

The sugarcane juice is then drained through the basket and the residue is left on the white cloth.

But there is still sugarcane juice in the residue, so you need to work together like making soy milk, gather several corners of the white cloth, wrap them around a stick, twist them in one direction, and press them tightly to press out most of the sugarcane juice in the residue in the white cloth.

In this step, the remaining residue is removed, and a "detergent" based on lime and carbon dioxide is added to it.

A list of the ratios of sugarcane juice and each ingredient of "detergent" is also written in the book.

But after all, it was the first time for Su Wu to operate, and she didn't dare to experiment with the vat of sugarcane water she got out all at once.

The two of them first scooped out a small half bucket.

The barrel is weighed before, and the sugarcane water is added and weighed again, and the barrel is removed, which is the pure weight of the sugarcane juice.

Lime is readily available.

But carbon dioxide ...... You have to control the amount to collect, which is really troublesome, especially the other gases produced by charcoal burning, which still requires Su Yu's ability to participate to be useful.

According to the ratio, reduce the amount of detergent and add it to sugarcane juice water, because carbon dioxide is soluble in water, and sugarcane juice is not pure sugar, but still has water.

At room temperature and pressure, about one volume of water dissolves one volume of carbon dioxide, and carbon dioxide can dissolve more under high pressure, just like making Coke, the box made by Su Wu has the blessing of her ability, which can do this.

The workers only had to operate the pressurized box as she asked them to do.

Later, she announced the secret recipe, others can also use the carbonization method to make white sugar, Su Wu uses abilities everywhere, just to increase production, others have no abilities, can only use a more cumbersome way to obtain the detergent.

Their output will be lower than hers, but they still have to make money from cheap sugar cane to make white sugar, but they are not as profitable as Ye Siyin and them are now.

This is done to get the juice mixture.

The mixed juice is heated and pre-ashed for the first time, and the temperature should not be too high at the beginning, about 45°C is better.

After that, you have to add excess lime milk and carbon dioxide, and the temperature has to be raised to about 65°C, which is a carbonic acid filling.

What is called carbonic acid saturation, Su Wu doesn't understand.

Anyway, that's what the book says, she can know what calcium carbonate and carbon dioxide are, and it's good how to write chemical formulas, more complex chemical terms, more complex chemicals, she really doesn't know, maybe she hasn't heard of it.

Aromatic hydrocarbons in the third year of high school, she had completely regarded chemistry as a book of heaven at that time, but fortunately she was an art and sports student, and it was okay if she didn't understand this thing.

Su Wan pulled back her long-ago memories of taking chemistry classes, and continued to watch the heating process, letting Feng Jing be responsible for burning charcoal to make carbon dioxide, sending them into the wooden barrel in front of her, and then injecting them into the heating pot here.

This process is to produce calcium salt precipitation.

After the first heating, strain it to get a carbon of clear juice.

After that, repeat this process, carry out the second carbonic acid saturation, continue to heat, the temperature of this process is higher than the first heating, it is more appropriate to keep it at about 75°.

After filtration, a two-carbon clear juice is obtained.

After these two processes, there will be fewer and fewer impurities in the syrup.

Finally, it is smoked with sulfur, which is mainly to add sulfur dioxide, which is for the purity of white sugar.

Heat, evaporate, and you're ready to get the syrup.

Of course, this step is still relatively early from success, in order to obtain high-quality white sugar, the procedure is really very cumbersome, the cost is very high, even in the industrialized world, it is because of these cumbersome procedures, so that the cost can not be reduced.

The living syrup is carried out for sulfur bleaching, which is also heated at this time, and the temperature is kept at 60 ° ~ 68 °.

The purpose of sulfur bleaching is to reduce the pH value from 7.0~7.2 to 5.8~6.4 caused by sulfur fumigation.

This process has already made Su Wu feel super troublesome, when producing syrup in the future, she will definitely not be able to leave the factory, she has to stay here, otherwise there is no pH test strip in ancient times, and the workers are inexperienced at the beginning, and they don't know how to control the quantity, so they can only rely on her ability to control it first.

You can only rely on their experience to make this step when everyone has experience.

At this time, the sugarcane juice has to continue to heat to evaporate all the water inside.

In fact, this step uses Su Wan's ability, not too fast, and the water inside can be drained in an instant.

But...... If you really want to use the ability, you don't need to have so many complicated programs in front of you......

After all, this is to benefit the people and provide jobs for people, so the evaporation of this step still has to be operated by everyone.

The first time the clean syrup is heated and evaporated, a lot of foam is generated, and the foam needs to be removed manually.

This step does not evaporate all the water at once, but concentrates the sugarcane juice from a sugarcane juice with a water content of about 86% to a syrup with a water content of 60%.

After that, there is a second sulfur fumigation, as well as desaturation filtration, this time it is really for bleaching, and the syrup obtained after this time contains only about 45% of the water.

After that, continue to boil the sugar, and you can get the sucrose crystals.

But this crystal is not the last white sugar.

At this time, the mixture of sucrose crystals containing the mother liquor is sugar paste.

The book said that it was to be put in the crystal machine, but the book could not see the composition of this thing, and the previous juicer Su Wu could understand roughly, centrifuge, she had also talked about it in class before, and knew what it meant.

This crystal aid machine only said that it was to help crystallization, but she didn't know how to help crystallization, probably just to let the syrup cool down quickly.

She had to put the sugar paste aside and let it cool itself.

Feng Jing proposed to fetch a few buckets of cold water and put the bucket with the sugar paste in it.

Su Wu hadn't drilled a well here yet, so she asked Feng Jing to go home to fetch water.

After that, with the help of cold water, the crystallization speed was much faster.

The last step is to pour the crystallized sugar paste into the centrifuge, and with the help of the centrifugal force generated by the rapid rotation of the centrifuge, the molasses is thrown out.

There is a screen in this centrifuge where the sucrose crystals are blocked and left in the sieve basket.

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