Digestate Transport

Applies to: Biogas Plant

Description:

This indicator refers to the reduction of fuel consumption for digestate transportation, taking into account transportation distance and implementation of separation techniques. Digestate separation creates two outputs, a liquid and a fibrous material, that need to be stored and handled separately. Mechanical separators, e.g. belt press, sieve drum, are commonly used, but non-mechanical methods, such as sedimentation or filtration through geo-textile tubes, can also be used.

Questions:

What is plant-to-farm distance of digestate?

Is liquid and solid fraction of the digestate separated?

Rating:

Transportation distance below 10 km

Transportation distance longer than 10 km, separation of liquid and solid fraction

Transportation distance longer 10 km, liquid and solid fraction not separated

Sources of information:

Seadi TA, Rutz D, Prassl H, K├Âttner M, Finsterwalder T, Volk S, Janssen R. 2008. Biogas Handbook.

Lukehurst C.T., Frost P., Seadi T.A. 2010. Utilisation of digestate from biogas plants as biofertiliser.