Gu Yunyang nodded; Gu Hanping had hit the nail on the head.

When pressing oil, the biggest fear is that the oil yield will not be high enough.

The oil yield of traditional pressing methods is definitely not as high as that of mechanical pressing.

Later generations developed a leaching method, which involves soaking plant seeds with high oil content in chemical agents to extract the oil.

However, oil produced by this method will inevitably contain some chemical agents.

Although national regulations stipulate that it complies with health guidelines.

But everyone knows the actual situation.

For example, after the milk scandal, several major manufacturers joined forces to push for a change in standards. In the 21st century, the standards were actually lower than those in 1986.

The most significant change is the increased number of bacteria, which is even higher than before.

Gu Yunyang said, "The oil yield is acceptable, reaching around 25%."

Traditional pressing methods yield only 15-20%.

25% is already quite high.

The oil yield of leaching can reach 99%, so it goes without saying that capitalists would choose it.

The leaching method uses solvents to dissolve oils, with an oil yield of up to 99%, but strict treatment of solvent residue is required.

Both processes require multiple refining steps for crude oil, including hydration degumming, alkali refining deacidification, decolorization, and deodorization, to finally obtain finished oil that meets edible standards.

The leaching method for oil extraction utilizes solvents that can dissolve oils to extract the oils from the raw material through wetting, penetration, molecular diffusion, and convective diffusion.

Then, the mixture of solvent and fat is separated, and the solvent is recovered to obtain crude oil.

In actual production in my country's oil refining industry, the most commonly used leaching solvents are several aliphatic hydrocarbons such as hexane or light gasoline.

Light gasoline is the most widely used solvent, but its biggest drawback is that it is flammable and explosive, has a complex composition, and a wide boiling point range.

Hearing that it was that high, Gu Hanping was quite satisfied.

This is the ceiling for the squeezing method; it's unlikely to go any higher.

Even increasing the pressure on the machinery is unlikely to work.

In addition, power consumption must also be taken into account.

A few days later, Gu Yunyang went to the agricultural machinery factory and brought back a press machine.

Actually, the brigade has an old-fashioned pressing method, but that method is very laborious. Several strong men have to work hard and exhaust themselves, and the oil they press is not as good as the oil from Gu Yunyang's place.

Gu Yunyang gave Gu Hanping a key and taught him how to use it.

Now, he's the only one in the village with a biogas generator set, so only his place has electricity, and the oil press can only be used here.

Gu Hanping first experimented with his own soybeans and found that the oil yield was indeed 25%.

Then, the entire Red Flag Brigade was in an uproar.

While the machine is still running, everyone is bringing their soybeans, peanuts, and other produce to have oil extracted.

They had no objection to receiving ten eggs for each oil pressing session.

If my husband were to use the traditional method to press oil, it would be tiring, and the oil yield wouldn't be as high as it is here.

If we bring over a little more soybeans and peanuts, we'll actually make a profit.

Some clever ones would put together two or even three soybeans and peanuts, and together put together ten eggs.

Gu Hanping was at a loss for words when it came to those who were taking advantage of the situation.

Fortunately, the electricity here for Gu Yunyang doesn't actually cost much, but he can only power a few households a day.

Because this biogas digester is not very large, the amount of electricity it generates is actually not that much.

It's fine for everyday use, but it would be too much for an oil press.

Therefore, Gu Hanping ultimately stipulated that a maximum of five companies could use the service per day.

Of course, the weight is also regulated.

Who has so many beans and peanuts?

Faced with the team members' excuses, Gu Hanping simply said, "Your family's private plot is only so big, where did you get so many beans? Did you secretly plant them outside?"

This is something we cannot admit.

Therefore, the eggs that are due still need to be handed over.