Monday, September 3, 2007

Waste Re-use in Paper Industry-FOXFIRE

For many paper mills in the world, managing the waste/rejects is always become a high concern. As we all know that nowadays finding the area for allocating the waste from paper industry is becoming more and more difficult. Most practice, the solid waste is "dumped" in the landfill, but now some european countries like Germany and Dutch prohibit the allocation of solid waste as a landfill, although in other european countries like England solid waste for landfill is still permitted, but a high charge is applied to the paper mills.
Foxfire company in Foxhol, Groningen, Holland has the solution for paper mill's waste management, especially for the solid waste, by processing it to be the secondary fuel that commonly used in Cement Industries. In August 2006, Foxfire had started with its production (7 million Euro-investment) by sourcing the rejects from 6 paper mills; 5 in Holland and 1 in Germany, with the capacity of 150,000 MT secondary fuel/year. With its full capacity, Foxfire able to process the rejects from 10-15 paper mills.

Foxfire is processing 60% paper mill's rejects and 40% other wastes-like sludge, domestric trash and rejects from plastic industry. Foxfire is specializing in "wet" raw material as they considered that handling the "wet" raw material is more difficult due to its unpredictable characteristics. Foxfire claimed that the raw material they used is safe. For this matter, Foxfire pointed N+P Company; the leader in rejects and wastes business. N+P provides the transporter trucks, checks the materials and arranges the licences needed by Foxfire.

At the initial process stage in Foxfire, the rejects (raw material) is pre-mixed with other waste materials (since this step is already catagorized as waste-processing-step, thus license is needed). After pre-mixing, the rejects (raw material) is then transferred to preshedder, to separate unexpected material inside the raw material (such as golf ball, stone, iron, even a hand granate..). The rejects (raw material) then thransferred to the dewatering press (the rejects normally containes 50% water content), and then transferred to the hopper using the t"transportation screw". Hopper will act as a buffer tank prior the drying stage. Drying stage is processed by using the natural gas burner, and continued with "Allgaier Tumbling Dryer". Since the whole process is highly dust-generating, thus a belt conveyor is used to transport the dried material to the storage before sending to the customers. The whole process/mill was designed by Foxfire but built by Siemens.

The secondary fuel as Foxfire's end product mostly sold to the cement industry, that commonly it uses 85% of the fuel from secondary fuel, including bark trees. Most important requirement for Cement Industry is the "Flying Burning Time", that the fuel used must be completely burned out in 2 seconds, and the secondary fuel able to fill this requirement.

Currently Foxfire had signed a contract from the potential customers in US and Japan for building mills there, but now Foxfire is still concentrating in European market.


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