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DESCRIPTION
The BG80 mixer is specifically designed for biogas fermentation tanks, characterized by an
high dry matter content.
The mixer employment is aimed at preventing the development of settled and floating layers
in the tank.
To ensure an excellent mixing efficiency, the BG80 mixer is provided with an hydraulic device
for the regulation of the tilt angle of the propeller in the tank.
The medium and gas tightness of the digester is made sure by a strong expansion joint which
is firmly fixed both on the mixer drive line and on the wall /or roof mounting plate, by means
of a flange coupling.
The surfacing and the consequent emission of gas bubbles, which form in the fermented
medium, are made easier by the vigorous and at the same time soft mixing of the bacteria.
That prevents an uncontrolled ferment “swelling”.
The mixer functioning time can change according to needs. It is generally recommended that
the motor rotation speed (r.p.m. ) should be adjusted according to the type of substrate to be
treated, by using an inverter. That can avoid the unnecessary functioning and optimize the
electric power consumption.
During mainly the loading and starting phases, the user has to set the correct functioning
time and the suitable motor rotation speed.
Usually we advise a starting phase with a high rotation speed which has to be gradually
reduced during normal operating.
No white spots have to come up to the surface (sulphur deposition) and no substance has to
deposit at the bottom of the tank.
Furthermore it is necessary to check the tank maximum level, above all in case of high silage
or great manure quantity.
In case of an increase of the tank maximum level or of sulphur deposition, extend the mixer
operating time and, if necessary, speed up the motor revolutions per minute.
The BG80 is standard provided with a 1600mm diameter 3 vane propeller and a strong
vibration-resistant frame, suitable to support the gear box and designed for both roof or wall
mounting.
