THE DIGESTER.

Is a cylinder made of stainless steel built to maintain anaerobic conditions with a doubled insulated wall.
The size depends on the nature of the effluent to be treated and on the resulting technique “continuously mixed” or “fixed bed”.
The continuous mixing technique applies to effluent containing above 5% of suspended solids such as pork slurries or chicken litter (after dilution).
For effluents from the wine industry which are already diluted, the inside of the digesters are equipped with a material that will provide a bacterial support. This technique is called “fixed bed”.
 

THE MIXING

The main purpose of the mixing is to homogenize the whole material that is being fermented and thus avoiding the separation of suspended solid, the thermal stratification and the accumulation of floating material.
This stage is done without any internal mechanism. The hydraulic recycling is achieved with one or several pumps. The best and most secure working conditions are achieved by optimizing the choice of the points where the liquid is taken out and then re-injected into the tank.
 

EVACUATION

An External apparatus allows a volumetric dosage of the quantity that needs to be removed from the digester at the end of each cycle.
A regular mixing cycle is completed within 15 minutes during which some of the parameters are continuously monitored, pH, temperature…..etc.
At the end of each cycle an evacuation takes place followed by an introduction
 

AUTOMATION
The unit is fully equipped with an integrated system that allows a real time interpretation of the provided values.

A remote control monitors continuous information. It is possible to intervene remotely or react on any parameter
Depending on the daily report sent by the pilot unit to the central management some parameters can be modified
In the same way, in the event of any abnormal functioning or any breakdown,

HEATING.

The digestor’s temperature is 35°c. A heat exchanger ensures that the right temperature is maintained in the digester by compensating the entry of cold liquid and the losses through the walls of the tank.
Various energy supplies can be used for this purpose: biogas itself, electricity, rejects in the shape of hot water, or steam generated by different agro-alimentary plants
 

THE BIOGAS.

The biogas generated by the anaerobic digestion can be cost-effectively stocked in synthetic air-proof gazometers stored in a light structured construction. However in order for that energy to remain cost-effective, the volumes to be stored should remain reasonable. It is always preferable to seek a direct use for this new energy.

Digesteur 5000 m3