Professor of Sichuan University studies leftovers and leftovers into coal, which can be converted into 200 catties per ton

Food waste utilization

Turning waste into treasure

In just a few steps, it takes 1 to 4 hours, the leftovers can be converted into bio-coal, and the effect is even better than ordinary coal.

The leftovers are put into the instrument, after 1 to 4 hours of hydrothermal carbonization reaction, it will become a pot of "black porridge", and then the water is separated by a vacuum pump, and it becomes black bio-coal, "this kind of coal" The calorific value of coal is higher than ordinary thermal coal and close to standard coal

Transform

Leftovers turn coal in 1 hour

Leftovers and bio-coal, seemingly irrelevant, how are they transformed?

At 4 pm on April 29, in Lu Hongyan's laboratory, the reporter saw the three main equipment of the project, the hydrothermal carbonization converter, the circulating water vacuum pump and the electric blast drying box

During these 1 to 4 hours, through the hydrothermal carbonization reaction of heating and then cooling, leftovers become a mixture similar to "black porridge"

benefit

The heat released is comparable to standard coal

In the laboratory, based on 1 ton of leftovers, Lu Hongyan calculated an account, "1 ton of kitchen waste contains 80% of water.

According to preliminary calculations, 1 ton of kitchen waste can extract 80-120 kg of combustible coal

"Carbonized liquid can also be used as biogas.

Visit

Fine and scented particles

In a laboratory of the School of Architecture and Environment of Sichuan University, the reporter saw many bio-coal products

Whether it is the bio-coal in the hand or the "black porridge" transformed from kitchen waste, there is a strong aroma of roasted coffee beans

But where does this special coffee aroma come from? Lu Hongyan said that it is not yet clear and is still under study

dialogue

Mature technology, hope to build a factory to deal with garbage

West China Metropolis Daily: Why do you want to study this project?

Lu Hongyan: I have lived in Germany for 8 years, and their research on waste recycling is relatively mature

When urbanization is underdeveloped, food waste is generally returned to the soil organically through poultry, which is a biological chain

The biggest advantage of the bio-coal obtained in our project is that it is equivalent to real coal, because the carbon contained in bio-coal is not much different from real coal

West China Metropolis Daily: The project has been studied for several years.

Lu Hongyan: Our small team has gone through three years of research, and the project has passed, which is considered to have had preliminary results

Judging from a large number of experimental results, the technology has matured