The exterior of the new phase I hall. Note the striking roof.
The system of belts above the new bunkers, with a hatch to deposit compost onto the top filler on the left.
alternatives, and Christiaens suggested we take a look at Huisman, a waste processing company in Noord-Holland, where they have a Cover-All roof. We paid them a visit and decided it was suitable for our purposes. ” The striking thing about the roof is that it looks like a tarp cover – which it actually is. Driessen: “Light metal beams top our concrete walls. Tarpaulin has been tensioned from these girders at the top and bottom, creating a hermetic seal. We create positive pressure in the hollow space between the two covers to exclude ammonia, so basically the rafters shouldn’t rust. Luckily we were allowed to build quite a high roof, so the vapours can be extracted easily.”
9000 tons
The new phase I mixing hall is intended for fermenting and turning the compost. The old hall will hold raw materials and a new mixing line. The materials will be mixed here, and pos- sibly undergo a short pre-composting process in the existing bunkers. The blend will then be
transported by a conveyor to the new hall, where top fillers fill one of the nine bunkers, each with a capacity of 1100 tons, from above.” At Walkro, it is possible to simultaneously fill one bunker and turn the contents of another as there are two separate belts above the bunkers, as well as two top fillers. “The total capacity of our new phase I facility is between 9000 and 9500 tons. Of this, 4000 tons is sent to the phase II and III tunnels at Prime Champ and LCB. The phase I composting plant formerly known as ‘De Klein’ in Maaseik is scheduled to close – we are taking over that capacity here. This will leave 5000 tons of phase I that we can fill our own tunnels with here. Previously, we could make a maximum of 6500 tons of phase I here”, said Driessen. “The first bunker should be filled in week 48 and we’ll be running at full production two weeks later. Christmas should be very interesting.” After the official opening, the building, which will be used at a later stage for phase I compost, was the venue for the celebrations.
“Christmas should be very
interesting”
Ñ
One of the nine, 1100 ton capacity bunkers, with a glimpse of the top filler at the top.
MUSHROOM BUSINESS 43
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