D2.1 - EU Project Neptune

NEPTUNE · Contract-No. 036845 Deliverable 2.1
Table 4.3 Heavy metals distribution during the incineration and pyrolysis (Kistler,
1986)
A - % of heavy metals input kept in the solid residue
B - % of heavy metals input transferred to the fly ash
4.1.2 Pilot plant trials and results
The pilot plant (Figure 4.4) was constructed and delivered by Pyromex, Switzerland and the
trials were performed in cooperation with Eawag. The plant is located in Munich, Germany
and not at the WWTP Glarnerland as originally planned, due to the possibility for Pyromex to
use it as a fully commercial plant after finishing the experiments.
Figure 4.4 Pilot plant for ultra-high temperature gasification process with feed device
(left) and reactor tube (right)
The sludge was fed to the reactor in batches of 4-6 kg. The residence time in the reactor was
controlled by adjusting the speed of the rotating snail, which transported material through the
reactor tube. Temperature was controlled at three points: at the beginning, in the middle and
at the end of the reactor tube. The inorganic product is pushed out of the reactor, and is
marked in the presented results as solid residue. The produced gas is transported through
the pipes to the cooling and water spraying system (scrubbing). The water is recirculated and
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