Abstract
The economics of employing sugarbeet in place of maize for biogas production were investigated from the currently available data and a model for calculation constructed on this basis. Taken into account were beet washing system, comminution technology, liquid and bag silaging, as well as the loading technology tailored to the method of preservation. Under optimal conditions, sugarbeet can constitute an economical alternative to the employment of silo maize as a fermentation substrate. Liquid silaging is profitable if the biomass is relatively cheap and the capital costs of its storage low. The ability to automate the loading of the biogas plant gives this system a substantial advantage. Commercially decisive is whether a process chain of preparation and storage that fits in with the existing beet logistics can be provided in practice. Bag silaging is more costly, chiefly because of the absence so far of a suitable, efficient technology to load and empty the biogas plant.
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