FRITSCH Cutting Mills for Biofuel Piloting Plants

Biofuels are a diverse range of biologically derived man-made renewable fuels made as a substitute for geologically produced, and finite, fossil fuels. Biofuels include bioethanol, biodiesel, plant oil, biomethane and BtL (Biomass-to-Liquid).

They can be derived directly from plant products e.g. by sugar fermentation or by the conversion of biomass (including agricultural waste) using thermal, chemical or biochemical means. The use of so-called ‘second generation’ biofuel, produced using agricultural ‘waste’ such as leaves and stems, is advantageous as it can take place in conjunction with food production e.g. of maize cobs. This helps nullify the criticism first generation biofuel production attracted following extensive land clearance and monoculture planting of sugar cane.

The source material for second generation production is obviously also much cheaper than the nutrient-rich whole plant, however more extensive pre-treatment of the cellulose and hemicellulose rich materials may be required.

One of the most important pre-treatment factors then becomes the size of the waste particle produced as this will influence the ease of manipulation during processing and, more importantly, the surface area available for the action of microorganisms and enzymes. In many biofuel pilot plant stations and installations FRITSCH cutting mills have been used in order to achieve the optimum degree of comminution of the plant material.

The PULVERISETTE 19 Universal Cutting Mill, used in conjunction with FRITSCH’s patented sample exhauster with Cyclone separator has proved particular advantageous for this. 

Cutting Mills comminute plant material using a rotor fitted with knives, in combination with fixed stator knives, to produce cutting and shearing forces. Thanks to the progressive geometry between the cutting edges of the rotor and the fixed knives, the sample material is automatically transported away and comminuted increasingly finely, by the shearing forces between the knives, until the required fineness is achieved.

Thanks to FRITSCH’s patented sample exhauster and the Cyclone separator it is possible to obtain sufficient amounts of comminuted plant material that can then be transferred to fermentation plants without any problem. In addition fine dust is kept out by the ultra-fine High-Efficiency Particulate Airfilter (HEPA).

Date added: 2015-10-06 14:08:35