Biofuels - from Waste to Energy

In collaboration with our partners, we have developed a technology suited for producing briquettes from straw for biofuel production. The straw-based briquettes can be used as fuel in both biogas and bioethanol plants. This solution is ideal for industrial agriculture, where a high amount of straw is produced as a by-product from food production. Agricultural by-products often end up as waste or residue, but much of it can be monetized through production of biofuels. C.F. Nielsen’s innovative solutions for briquetting straw enables the conversion from waste products to biofuels. Our technology enhances the dispersal of briquettes in biofuel reactors, increasing the efficiency.

Customer cases for biogas and bioethanol
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Briquetting for biofuels - How to get started

It is no secret that briquetting for biofuels is a cost-effective and CO2 beneficial alternative to using fossil fuels for industrial purposes. At C.F. Nielsen, we are experts in briquetting solutions, and we always want to educate and innovate ourselves and the solutions we provide for our customers. Our technology for producing biofuels is a result of this approach. We deliver both briquetting machines and complete lines for briquetting straw, as well as advisory engineering and after-services. A full line consists of straw handling equipment, which includes equipment for shredding and milling the straw as well as sand- and stone removal, and a high capacity mechanical press. We deliver lines with capacities starting from 500 kg per hour ranging to 20 tons per hour.

Why produce briquettes from biofuels?

We are all very much aware of how global warming is affecting our environment. We are also aware of how fossil fuels are aiding global warming. The opportunity to turn waste products from agriculture into fuel is therefore a beneficial opportunity to continue to produce high amounts of energy with less damaging alternatives to fossil fuels.

Using briquetted straw to produce bioethanol is truly a 2nd generation technology, because straw is often considered a waste or by-product with few uses and little value in agriculture. Therefore, conveying waste into fuel through Kinetic Biofuel is a financially beneficial approach to agricultural business.
With our solution for biofuels, the briquetting process creates a small steam explosion, which changes the cell structure of the straw. Due to this, the briquetted straw obtains an absorption capacity which is 7-10 times higher than a normal straw. The heightened absorption capacity enhances the dispersal of straw-based briquettes in the biofuel reactors. Due to the reduced complexity of the ethanol process, the investment in the technology will be considerably reduced, as part of the pre-treatment takes place during the briquetting process. Therefore, both the capex and the opex costs will be reduced.

This technology enables farmers and producers in the agricultural industry to convert farming by-products from waste to a marketable product in a cost-effective way.

Mechanical briquetting presses

Our large mechanical presses BP6510 and BP7510 can be delivered individually or as a part of a full straw briquetting line. The presses have capacities of respectively 1,5 and 2,75 tons of briquetted straw per hour. The mechanical presses are piston and fly-wheel based, and they operate with 270 revolutions per minute, which creates pressure of more than 2000 kg/m2. , which aids in creating the aforementioned steam explosions, changing the structure of each straw. The high amount of pressure and the entailing process makes the pre-treatment of the straw much simpler than alternatives to this process.

A full briquetting line will cover all the principal steps, both the mechanical pre-treatment of the straw, the actual briquetting of the raw material and the final steam pre-treatment before the ethanol process. This includes the enzymatic liquidation, fermentation and distillation, as well as the final liquid separation. Furthermore, the production of biogas on the stillage is an integral part of biofuel production and the final liquid separation.