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Biogas Journal | <strong>Autumn</strong>_<strong>2017</strong> English Issue<br />
photo: Firm Geringhoff<br />
For this reason, Mr. Klapprott recommends<br />
using as many blades as possible<br />
to chop the maize stover. He wants<br />
to do that this year. He doesn’t think of<br />
using a loading wagon with cutting system<br />
because due to the cutting length<br />
more husk leaves and stalk parts will<br />
fit through – similar to the situation<br />
now with the chopping drum with few<br />
blades in the chopper. Nevertheless,<br />
he acknowledges that with the loading<br />
wagon with cutting system assuming<br />
the same volume more stover fits on the<br />
loading wagon and the harvesting costs<br />
are lower than those with the chopper.<br />
Pieper, however, does not want to dispense<br />
with the chopper because he doesn’t want to install<br />
a separate technology, which would increase the<br />
biogas plant’s need for electricity. He would rather let<br />
biology do its work in the fermenter vessel. In his region<br />
yields of sugar-beet plants of 90 tonnes of biomass<br />
(fresh weight) per hectare are common. Pieper wants to<br />
grow more sugar-beets “because they are an outstanding<br />
fit in crop rotation. The sugar-beet also increases<br />
the grain maize yield by about 2 tonnes per hectare”.<br />
After a storage period of eleven weeks, the biogas producer<br />
opened the silage heap – which was in very good<br />
condition – in the middle of January. When a reporter<br />
for the Biogas Journal was there on the 1st of March,<br />
part of the silage had already been fed to the methane<br />
bacteria. Upon approaching the remaining heap of silage<br />
it still smelled good like lactic fermentation – no<br />
areas of mould were visible. The pieces of sugar-beet in<br />
the mixed silage also looked very good. At the removal<br />
side of the silage, it was apparent how much the stover<br />
had been compressed by the compacting.<br />
The Claas combine with<br />
the Geringhoff maize<br />
harvester deposits the<br />
maize stover at centre<br />
into a windrow beneath<br />
the thresher. The<br />
chopper comes directly<br />
behind to pick up as<br />
much of the stover as<br />
possible.<br />
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