Graf oneAdvanced Installation Instructions Manual page 6

Forced ventilation via the bioreactor's aeration unit is normally not sufficient. On the other hand, air can be
supplied through a vented tank cover.
In unfavourable conditions, the ventilation performance can also be improved by the additional use of
electric pipe aerators.
Ventilation with unobstructed outflow
1 Please note:
Ventilation in the case of infiltration or with obstructed
outflow
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